Explanation:
G is the universal constant of gravitation, approximately 6.67×10⁻¹¹ m³/kg/s².
g is the acceleration due to gravity. It's defined by the universal law of gravity as:
g = MG / r²
where M is the mass of the planet and r is the distance from the planet's center to the object.
Near the surface of the Earth, g is approximately 9.8 m/s².
An example of a product made from a renewable resource is
A) electricity made from coal.
B) coal slurry made from coal.
C) ethanol fuel made from corn.
D) plutonium made from uranium.
Answer: C) ethanol fuel made from corn.
Explanation:
Ethanol made from corn is a type of biofuel, which is made from renewable resources known as biomass (plants, for example).
In the case of bioethanol, this is produced by the fermentation of sugars (from starch) contained in the organic matter of plants, such as beets or corn.
Therefore, the correct option is C.
Which of the following is a contact force?
A. Air resistance
B. Magnetic force
C. Gravity
D. Electrical force
Air resistance is type of contact force as the air should be in contact with the surface of moving
object to ocure air resistance.
The force that is a contact force as listed from the option is air resistance (Option A)
What is a contact force?A contact force is a force that results from the direct contact between the objects involved. Some examples of contact force includes:
Force of pushForce of pullAir resistanceNon contact force on the other hand requires no contact with the objects involved. These forces includes:
Magnetic forceElectrical forceGravitational forceWith the above information, we can conclude that the contact force in the options given is air resistance (Option A)
Learn more about contact and non contact force:
https://brainly.com/question/18451249
#SPJ6
How would a geologist identify where an igneous rock was formed? A. If it has coarse grains, then it cooled slowly on the surface of the earth. If it has fine grains, then it cooled rapidly beneath the earth's surface. B. If it has coarse grains, then it cooled rapidly on the surface of the earth. If it has fine grains, then it cooled slowly beneath the earth's surface. C. If it has coarse grains, then it cooled rapidly beneath the surface of the earth. If it has fine grains, then it cooled slowly on the earth's surface. D. If it has coarse grains, then it cooled slowly beneath the surface of the earth. If it has fine grains, then it cooled rapidly on the earth's surface.
Answer:
D. If it has coarse grains, then it cooled slowly beneath the surface of the Earth. If it has fine grains, then it cooled rapidly on the Earth's surface.
Explanation:
The easiest way for a geologist to identify where the igneous rocks have formed is to look at their grains. There's two types of igneous rocks, intrusive and extrusive. The intrusive igneous rocks have formed from the magma that has cooled off slowly deeper into the crust, thus their crystals had more time to grown, and they have coarse grains. The extrusive igneous rocks have formed from the lava that has cooled off quickly on the surface, thus their crystals had very little time to grow, so they have fine grains.
The correct option is D. If it has coarse grains, then it cooled slowly beneath the surface of the earth. If it has fine grains, then it cooled rapidly on the earth's surface.
To understand why option D is correct, let's consider the processes of igneous rock formation and the factors that influence grain size:
1. Intrusive (plutonic) rocks are formed from magma that cools and solidifies within the Earth's crust. This slow cooling process allows for the formation of large crystals, resulting in coarse-grained rocks. Since the cooling is slow, the mineral ions have more time to move and form larger crystals. Examples of intrusive rocks include granite and gabbro.
2. Extrusive (volcanic) rocks are formed from lava that cools and solidifies on the Earth's surface. This rapid cooling process does not allow much time for crystal growth, resulting in fine-grained or aphanitic rocks. The rapid cooling rate traps the mineral ions before they can organize into larger crystals, leading to a rock with small, barely visible crystals. Examples of extrusive rocks include basalt and rhyolite.
Therefore, the identification of the environment in which an igneous rock was formed is based on the texture of the rock, which is indicative of the cooling rate:
- Coarse grains (phaneritic texture): The rock cooled slowly, which typically occurs beneath the Earth's surface where the surrounding rock acts as an insulator, slowing down the cooling process. This is characteristic of intrusive rocks.
- Fine grains (aphanitic texture): The rock cooled rapidly, which typically occurs on the Earth's surface where the lava is exposed to the atmosphere or water, leading to quick heat loss. This is characteristic of extrusive rocks.
Based on this understanding, the correct identification is:
- If an igneous rock has coarse grains, it cooled slowly beneath the surface of the earth (intrusive).
- If an igneous rock has fine grains, it cooled rapidly on the earth's surface (extrusive).
Hence, option D is the correct answer.
Suppose a fly and an eagle have the same kinetic energy. How could this be true?
A fly and an eagle could have the same kinetic energy if the fly compensates its smaller mass by flying at a much higher velocity, whereas the eagle, which has a larger mass, would fly at a slower speed to achieve the same kinetic energy. This is a direct result of the kinetic energy formula and the principle of conservation of energy.
Explanation:The scenario where a fly and an eagle have the same kinetic energy is actually possible. Kinetic energy, which is the energy an object possesses due to its motion, can be calculated using the formula ½mv², where 'm' is the mass of the object and 'v' is its velocity. For the fly and the eagle to have the same kinetic energy, the fly, which has a much smaller mass compared to the eagle, must compensate by having a much higher velocity. Conversely, the eagle with a larger mass can have the same kinetic energy by flying at a lower velocity.
For example, if we consider the kinetic energy formula, a very light fly (let's say 0.002 kg) moving at a high speed (say 20 m/s) would have a kinetic energy of 0.4 Joules. In comparison, a massive eagle (for instance, 4 kg) would only need to fly at around 0.14 m/s to have the same kinetic energy of 0.4 Joules. This illustrates how mass and velocity can vary inversely for different objects to have equivalent kinetic energies.
While it might seem counterintuitive, this is a direct consequence of conservation of energy and the kinetic energy relationship. The concept that energy cannot be created or destroyed, but only transferred or transformed, means that two vastly different animals could have the same kinetic energy if their masses and velocities are complementary.
Amplitude modulation is used in?
A.AM radio
B.microwave ovens
C.the internet
D.FM radio
Amplitude modulation is used in AM radio.
Answer is A.
Answer:
Amplitude modulation is used in AM radio.
Explanation:
Information signals must be transported between a transmitter and a receiver on some form of transmission medium. However, information signals rarely find a suitable way to transmit. Therefore, modulation is defined as the process of transforming information from its original form to a form more suitable for transmission, and is performed on the transmitter in a circuit called a modulator.
AM means modulated amplitude or amplitude modulation; it consists in varying the amplitude of a carrier wave of relatively high frequency according to the amplitude of the modulating signal (information). Frequencies that are high enough to radiate efficiently through an antenna and propagate through free space are commonly called radio frequencies.
AM was the first technique that was used to make radio.
Then amplitude modulation is used in AM radio.
The brightness of a star depends on its (color, composition of atmosphere, or distance from earth), and stars that are closer look (brighter, dimmer, or white).
Answer:
Distance, Brighter
Explanation:
Think of a flash light, one close and one far which is brighter and which is dimmer.
Hope this is what your teacher put as the answer!
Answer:
Distance, brighter
Explanation:
Brightness depends upon the amount of power that is radiated by a star
This in turn follows the inverse square law. That is, as the distance from the object increases, brightness decreases as the square of the distance.
Color depends on the composition of the star's radiation.
When the stars are bright, it can be understood that they are closer, compared to other stars.
According to Ohm's law, a circuit with a high resistance _____. will have a low electric current will have a high electric current will have an equal electric current will have an electric current but the relative amount cannot be determined
Answer:
current
Explanation:
According to Ohm's law, a circuit with a high resistance will have a low electric current
Explanation:
The basic electricity law is Ohms law. It considers three important elements which that electrical quantities. They are voltage, resistance and current. According to this law, the electric current that flows in a circuit has direct proportionality to the voltage and inverse proportionality to the resistance.
Thus, if a circuit has high resistance it implies that the electric current flowing in that circuit is low. If the circuit voltage is increased, there will be an increase in the current but the circuit resistance will remain unchanged. Hence, current is related with both voltage and resistance. Current has direct proportionality to voltage and inverse to the resistance.
If a battery in a circuit is 24 volts and the resistance is 12 ohms what is the current
I = 2A.
The easiest way to solve this problem is using Ohm's Law equation I = V/R.
The battery in the circuit is V = 24V and the resistance R = 12Ω, to calculate the current we use the equation above:
I = 24V/12Ω = 2A
Using Ohm's law, which states that current equals voltage divided by resistance, the current in a circuit with a 24-volt battery and a 12-ohm resistance is found to be 2 amperes.
Explanation:To calculate the current in a circuit with a given voltage and resistance, we can apply Ohm's law, which states that current (I) equals voltage (V) divided by resistance (R). In this case, we are given a 24-volt battery and a resistance of 12 ohms.To calculate the current in a circuit with a given voltage and resistance, we can apply Ohm's law, which states that current (I) equals voltage (V) divided by resistance (R). In this case, we are given a 24-volt battery and a resistance of 12 ohms. Using Ohm's law:
I = V / R
I = 24 V / 12 Ω
I = 2 A
Therefore, the current flowing through the circuit is 2 amperes (A).
Learn more about Ohm's Law here:https://brainly.com/question/36009177
#SPJ2
a filament lamp of resistance 3 ohms is connected to the terminals of a 6 V battery. when the switch is closed, the current in the circuit is
voltage = current * resistance
so
current = voltage/resistance
therefore,
current = 6/3 A = 2 A
Answer:
tratamento de lei ohm
Explanation:
What is the difference between chemical change and a physical change?
Answer:
Explanation:
There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
A 5 kg rock is 8 m above the ground,Calculate it's energy?
Answer:
392 J
Explanation:
Gravitational potential energy is:
PE = mgh
where m is mass, g is acceleration of gravity, and h is the height.
PE = (5 kg) (9.8 m/s²) (8 m)
PE = 392 J
This direct relationship graph shows that the position of the car as time elapses.
When there is direct relationship the car moves with respect to time.
Effect of direct relationshipThe direct relationship in the graph shows that the position of the car positively changes as time elapses because there is a direct relationship between position and time.
Direct relationship means when one factor increases the other also increases whereas one decreases the other also decreases so we can conclude that when there is direct relationship the car moves with respect to time.
Learn more about relationship here: https://brainly.com/question/26152883
Learn more: https://brainly.com/question/12680874
Answer: Increases
This direct relationship graph shows that the position of the car
increases as time elapses.
Explanation: got 100 percent on edge
Why does water have a high surface tension? (2 points) Hydrogen bonding keeps water molecules close together. Water is a liquid at room temperature. The lengths of the bonds in water molecules can change. Water molecules contain 18 electrons.
The correct answer is A. Hydrogen bonding keeps water molecules close together.
Explanation:
In physics, surface tension refers to the tension that is created in the surface of liquids as a result of bonds or attraction between particles and that makes the surface layer denser than the rest of the liquid. In the case of water, this occurs due to the bonds created between the hydrogen particles with other particles in water that create a surface that is denser and flexible. This only occurs in the surface while particles in the rest of the liquid do not form these bonds. Considering this, it can be concluded water has a high surface tension because "hydrogen bonding keeps water molecules close together".
Water has a high surface tension due to two key factors:
hydrogen bondingliquid state of water at room temperature.Why does water have a high surface tension?The high surface tension of water arises primarily from the presence of hydrogen bonds between water molecules and the fact that water is a liquid at room temperature.
Hydrogen bonding occurs when the positively charged hydrogen atom in one water molecule is attracted to the negatively charged oxygen atom of another water molecule. These hydrogen bonds create cohesive forces holding the water molecules close together.
Read more about water
brainly.com/question/1313076
#SPJ6
........................................................ waves are detected first because they move so fast .
.......................................... angles to the direction of movement .
A kind of scale used to measure the amount of seismic energy released by an earthquake : ................................
PRIMARY Waves Are Detected First Because They Move So Fast.
RIGHT Angles To The Direction of Movement.
A Kind Of Scale Used To Measure The Amount of Seismic Energy Released By An Earthquake RICHTER SCALE
a bicycle is a compound machine, true or false
This is true. The break handles and brakes are levers and the seat adjustment (raise or lower) is a screw.
Answer:
True.
Explanation:
A bicycle is a compound machine.
Photoelectrons with a maximum speed of 7.0 x 10^5 m/s are ejected from a surface in the presence of light with a frequency of 8.00 x 10^14 Hz. Calculate the energy required to eject photoelectrons from the surface
Final answer:
The energy required to eject photoelectrons from the surface can be found using the equation E = hf, where E is the energy and f is the frequency. Substituting the given values, the energy required is 5.30 x 10^-19 J.
Explanation:
Energy required to eject photoelectrons from the surface
Max speed of photoelectrons = 7.0 x 10^5 m/s
Frequency of light = 8.00 x 10^14 Hz
The energy required to eject photoelectrons can be found using the equation:
E = hf
Where E is the energy, h is Planck's constant (6.626 x 10^-34 J.s), and f is the frequency.
Substituting the values:
E = (6.626 x 10^-34 J.s)(8.00 x 10^14 Hz) = 5.30 x 10^-19 J
The energy required to eject photoelectrons from the surface is 5.30 x 10^-19 J.
Which of these correctly shows what happens when two magnets are placed side by side?
A. N__S 《 《N__S
B. S__N》 《N__S
C. S__N《 》S__N
D. N__S《 》S__N
Answer:
D
Explanation:
Remember that magnets only attract at different poles. If both poles are the same, they repel
When two magnets are placed side by side they can either attract or repel each other depending on the arrangement of their poles. Option B correctly shows the magnets attracting each other.
Explanation:When two magnets are placed side by side they can either attract or repel each other depending on the arrangement of their poles. In option B, the magnets are oriented in a way that the south pole of one magnet is facing the north pole of the other magnet. This is the correct representation of what happens when two magnets are placed side by side because opposite poles attract, resulting in the magnets sticking together.
Learn more about Magnetism here:https://brainly.com/question/13026686
#SPJ2
conclusion on ohm's law experiment
Answer:
Explanation:
In our previous articles, we observed the theoretical formulas of Ohm’s law, its calculations in the lab report, and experiment. Today you’ll learn the verification of theory vs experimental results on a 1 kΩ resistor.
The theoretical results are obtained from the formula of Ohm’s law: V = IR. The experimental verification is provided for a metal film 1 kΩ (±0.05%). We have used a high-quality resistor with negligible tolerance value so as to reduce the tolerance error.
The little problem in our calculations arises due to improper handling of multimeter probes. You can learn the complete method to perform the Ohm’s experiment here and can calculate the current values by using the Ohm’s law calculator.
The latent heat of vaporization of a substance is the amount of energy associated with doing which of the following to 1 kg of the substance?
(PLEASE HELP NEED ANSWER ASAP!!)
Answer:
B) Boiling it at its boiling point
Explanation:
As we know that the heat required to convert the given substance from liquid to vapor at its boiling point is known as latent heat of vaporization
So here we know that
[tex]Q = mL[/tex]
here we know that
[tex]L = \frac{Q}{m}[/tex]
so it is known as the heat required to boil the given substance of unit mass at its boiling point
so correct answer will be
B) Boiling it at its boiling point
Janet installed a dimmer on the lights in her bedroom. She slid the dimmer switch, causing the resistance in the circuit to decrease. Assuming the voltage is constant, what affect will Janet’s actions have on the circuit? The voltage will increase from 120 to 240 volts. The lights will brighten. The current will decrease. The current will increase. The lights will dim.
Answer:
The lights will brighten.The current will increase.Explanation:
The question implies that the dimmer here is based on a resistor. For the dimmer to work properly, it needs to be connected to the lights in series. The total resistance of the series circuit is the sum of the resistance of
the dimmer resistor, andthe lights.Reducing the resistance of the dimmer resistor will reduce the total resistance of the circuit. The question states that voltage across the series circuit is "constant." There will not be a change in the voltage across the circuit. The voltage across the lights will increase but will not exceed the voltage of the power supply. The RMS voltage of power supply in the US is 120 volts. The voltage across the light will become closer to 120 volts. However, only reducing the resistance of the switch will not cause the voltage to exceed 120 volts.
[tex]\displaystyle \rm Current = \frac{Voltage}{Resistance}[/tex].
Resistance drops while voltage across the entire circuit stays the same. As a result, the current through the circuit will increase.
Current is the same for all appliances connected in series. The current in the lights will increase. Assume that the resistances of the lights stay the same,
[tex]\displaystyle \rm Power = Current^{2} \times Resistance[/tex].
Power dissipated in the lights will increase. More energy will be consumed to produce light in unit time. As a result, the lights will brighten.
which of the following is not a base?
A shampoo
B toothpaste
C bleach
D orange
Answer:
D
Explanation:
Orange juice at least is acidic and therefore not basic.
Toothpaste,bleach and shampoo are base. While orange has the acidic nature. Orange is not the base.
What is the difference between the acid and base?Acid is a chemical substance that, when dissolved in water, produces a solution with higher H+ ion activity than pure water.
A base is an aqueous material that receives protons, contributes electrons, or releases hydroxide (OH-) ions. A proton donor is an acid. A base, on the other hand, is a proton acceptor.
The important base and their uses;
1.sodium hydroxide, ------- Used in the manufacture of soaps
2.potassium hydroxide --------Used in the production of liquid soaps and soft soaps. Used in alkaline batteries.
Toothpaste,bleach and orange are base. While orange has the acidic nature. Orange is not the base.
Hence, option D is correct.
To learn more about the acid and base, refer to the link;
https://brainly.com/question/23687757
#SPJ2
Which type of force should she place in the cell marked x
Answer:
Gravity
Explanation:
For a space station in orbit, the centripetal force is the force of gravity.
For a child in a swing, the centripetal force is the normal force.
For a ball on a string, the centripetal force is the tension.
Answer:
Gravity
Explanation:
Gravity is one of four fundamental forces in nature. The other fundamental quantities are the electromagnetic interaction force, the weak force and the strong force. Simply put, gravity is the magnitude responsible for defining the weight of a body, being the centripetal force of orbiting objects (such as a space station, for example) and being the vertical and downward force that holds us together with the planet. Any object that moves in free fall is under the influence of gravity acceleration, which on Earth equals approximately 9.8 m / s2.
heeeeelp urgent
I need an compare and contrast between energy and work.
20 pts.....
energy is the ability to do work while work is the dot product of force and displacement
Work is done by applying force. Energy is the ability to perform work or an action. Both are smaller units and are related closely.
Explanation:
Work is an act of overpowering resistance.It is done by applying force. It acts as evidence of empowerment of resistance form the application of force movement.
The capability to perform some work or action is Energy. Energy can take different forms like light, electrical, heat, etc. The energy in motion is work. The energy changes form one form to another by the process of work. Work can be of only two forms. It can be either positive or negative.
A 2000 kg car is pulling a 1000 kg trailer. The car's engine exerts 6000 N of force to move the car and the trailer. In addition, the car and the trailer experience a 1000 N frictional force as they are being pulled. What is the magnitude of the net force on this system ?
a. 2000 N
b. 4000 N
c. 5000 N
d. 8000 N
The magnitude of the net force on the car and trailer system is 5000 N.
Explanation:The magnitude of the net force on the car and trailer system can be calculated by subtracting the frictional force from the force exerted by the car's engine. In this case, the engine exerts a force of 6000 N and the frictional force is 1000 N. Therefore, the net force is 6000 N - 1000 N = 5000 N. So, the correct answer is c. 5000 N.
Learn more about Net force on a system here:https://brainly.com/question/2902811
#SPJ2
According to the law of conversion of matter, which chemical equation represents a possible chemical reaction
a. 2Na+ Cl2=2NaCl is the most possible chemical reaction that can occur
what type of reaction happens when a base is mixed with an acid
Mixing a base with an acid results in a chemical reaction called neutralization. The result is a perfectly balanced solution of salt and water with a pH of 7 if the acid and base are balanced properly. Depending on the bases and acids used, it can be a dangerous experiment.
Neutralization reaction happens when a base is mixed with an acid. Acid neutralize the base to form the salt and water.
What is the difference between the acid and base?Acid is a chemical substance that, when dissolved in water, produces a solution with higher H+ ion activity than pure water.
A base is an aqueous material that receives protons, contributes electrons, or releases hydroxide (OH-) ions. A proton donor is an acid. A base, on the other hand, is a proton acceptor.
Acid neutralize the base to form the salt and water.
Hence, neutralization reaction happens when a base is mixed with an acid.
To learn more about the acid and base, refer to the link;
https://brainly.com/question/23687757
#SPJ2
100 POINTS!!!! ANSWER QUICKLY NOWWWW!!!! How does an electric motor convert electrical energy into mechanical energy? A. When current flows through the motor, it powers electromagnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the electrical energy available. B. When mechanical energy flows through the motor, it powers electromagnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the electrical energy available. C. When magnetism flows through the motor, it powers electromagnets that are attracted and repelled by the poles of permanent magnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the mechanical energy available. D. When current flows through the motor, it powers electromagnets that are attracted and repelled by the poles of permanent magnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the mechanical energy available.
Answer:
An electric motor converts electrical energy into mechanical energy. The process is as follows:
D. When current flows through the motor, it powers electromagnets that are attracted and repelled by the poles of permanent magnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the mechanical energy available.
Select the correct answer.
Why is the primary mirror in a telescope curved?
A.
to magnify the image
B.
to direct light rays to a focal point to intensify them
C.
to change the direction of the rays
D.
to bend the rays
E.
to absorb extra light
Answer:
to absorb extra light- E.
Answer:
E.
Explanation:
Curved mirrors absorb more light that the flat ones, this means that the image you're gonna get it has more information, you can see more.
That's why curved mirror are also used to vigilance in stores for example. Because allows you to see a more panoramic view due to the extra light reflection.
Why does the earth rotate?
A. Because Earth is formed from cold gases collapsing due to gravity
B. Because the matter in the nebula that formed Earth was spinning
C. Because Earth forms more than 99% of the mass of the solar system
D. Because the hydrogen atoms inside the nebula fused to form helium
Answer:
the answer I think is A im so sorry if its wrong
Explanation:
Because yes we do have gases collapsing we also have dust collapsing with it and surrounding it to make a disk type of air flow that pushes it that makes it rotate if that makes sense. yet again super sorry if its wrong.
Answer:
the answer is actually B
Explanation:
When our solar system formed out of a gas cloud, called a nebula, there was lots of dust and gas coming together due to the force of gravity. The dust and gas was already moving around in a circle. As it all clumped together to form the Sun and planets, these new objects started to spin – and then spin faster.
i hope this helps!!!
HELP ASAP PLEASE!! ❤
If we use ______ to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.
A) Wood
B) Clay brick
C) Iron
D) Aluminum
E) Copper
F) Nickle
I believe the answer is C iron...
Answer:
E) Copper
Explanation:
Copper has the strongest conductivity form the options, the greatest conductor of all is Silver, cause it has a 105% of conduction, the next one is Copper, with a 100% and the third one would be Gold with a 70%, this is measured according to the resistance that the metal creates against the electricity flow through its material.