Answer:
1 A
2 D
3 D
Explanation:
i hope this helps
Answer:
Option-(A): Electrical energy runs through a wire to a 60 Watt bulb producing light.Option-(A): The ability to do work.Option-(B,C): Energy is the force used to move an object, and Energy is required to set an object in motion.Option-(B): You predominantly use vector quantities.Explanation:
Energy:
The basic capacity or the element which is required to transfer the amount of data or the information or any sort of elements from the point of generation to the point of destination is called as the energy.
While, the Energy,E is basically the concept of storing the amount or level of capacity inside a source or it can be transferred from the point of generation to the point of its source or destination. It is a scalar quantity just because the two vector quantities the time,t and the force,F gives rise to the scalar quantity known as the energy,E.
The energy,E is transferred from one point to another.While, each object in this universe has some mass,m while the objects can be moved from one point to another when the energy,E stored inside the object is transferred from its stored form into motion.
HELP ASAP! GIVING BRAINLIEST
When a pendulum hits a metal lid or pan, what forms of energy can you identify?
Kinetic energy
When the pendulum hit the metal lid or pan it shakes
What type of reaction feels cold to the touch?
Answer:
Explanation:
An endothermic reaction absorbs heat, so it will be cold to touch.
When it will be cold to touch, an endothermic reaction will be present.
What is endothermic reaction?The endothermic reaction is the reaction which absorbs heat and reduces the temperature.
When we are feeling cold to touch any object, that object has undergone the reaction like endothermic reaction.
For example: In refrigerator, the endothermic reaction will let each food item to make cold.
Thus, endothermic reaction feels cold to the touch.
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two appliances a lamp with a resistance of 15 and a curling iron with a resistance of 20 are connected in parallel to a 120v source through a 2 resistor in series how much current passes through the circuit when both appliances are on?
Answer:
11.3 A
Explanation:
First of all, we need to find the equivalent resistance of the two appliances in parallel, which is given by:
[tex]\frac{1}{R_{12}}=\frac{1}{R_1}+\frac{1}{R_2}=\frac{1}{15 \Omega}+\frac{1}{20 \Omega}=0.116 \Omega^{-1}\\R_{12} = 8.6 \Omega[/tex]
Then we know that these two appliances are connected in series to another resistor of
[tex]R_3 = 2 \Omega[/tex]
So the total resistance of the circuit is
[tex]R=R_{12}+R_3 = 8.6\Omega + 2\Omega = 10.6\Omega[/tex]
And since we know the voltage of the source,
V = 120 V
We can now calculate the current in the circuit by using Ohm's law:
[tex]I=\frac{V}{R}=\frac{120 V}{10.6 \Omega}=11.3 A[/tex]
Material speed of sound in m/s
air 331
helium 972
tap water 1493
sea water 1533
aluminum 5100
Based on the data in the table, what can we reasonably conclude about the speed of sound through various materials?
A) The speed of sound is faster in lighter materials.
B) The speed of sound is higher in liquids than in solids.
C) The speed of sound is higher in solids than in liquids.
D) The speed of sound moves slower when atoms are closely packed.
Answer:
C. is correct option.
Explanation:
Speed of sound in a particular temperature depends upon bulk modulus and density of material.
It is directly proportional to bulk modulus of material and inversely proportional to the density.
As we move from air to aluminium, their density increase which decrease speed of sound in them. But as we move down to their bulk modulus also increases and increase in that bulk modulus is too much comparable to their increase in density.(You can google their density and bulk modulus respectively).
So, at the end their bulk modulus factor overcome the sound that decreased due to density.
And overall sound increases .
Therefore the speed of sound is higher in solids than in liquids.
Answer: A
Explanation:the other ones was wrong
Ohm's Law Problems
1. If you have a circuit with a 50V battery and a 10 OHMS resistor what is current through the
circuit?
Answer:
The current through the circuit is 5A
Explanation:
Ohm's Law
The intensity of current through a circuit is directly proportional to the voltage or voltage of the same and inversely proportional to the resistance it presents.
[tex]I=\frac{V}{R}[/tex]
Where I is the intensity that is measured in amperes (A), V the voltage that is measured in volts (V); and R the resistance that is measured in ohms (Ω).
With a 50V battery and a 10Ω
[tex]I=\frac{50V}{10ohms}=5A[/tex]
When sunlight reflects from a horizontal surface horizontally polarized light reflects more strongly than the rest of the sunlight. This reflection produces?
An image
A mirage
Scattering
Glare
Answer:
The answer is Glare
Explanation:
When sunlight reflects from a horizontal surface, horizontally polarized light reflects more strongly than the rest of the sunlight. This reflection produces glare. To block the glare, polarized sunglasses have vertically polarized filters, which block the horizontally polarized light.
How are uniform circular motion maps the same as linear motion maps? Check all that apply.
Time is represented by dots at 1-second intervals.
Start position is represented by an x.
Velocity vectors change length as the object’s speed changes.
Velocity vectors change direction as the object’s direction changes.
Acceleration vectors always point in the same direction.
Answer:
Time is represented by dots at 1-second intervals.
Velocity vectors change direction as the object’s direction changes.
Explanation:
I just did the problem and got it right! :)
The acceleration of circular path is continuous and the direction of the acceleration is inward.
Time is represented by dots at one second intervals. Velocity vectors change direction with change of the object’s direction.Circular motion:
It is the motion of an object in the circular path at constant velocity.
Velocity if the circular path is constant and the direction of velocity is tangent to the object' motion.
The acceleration of circular path is continuous and the direction of the acceleration is inward.
Therefore, for uniform circular motion maps, time is represented as the dots of one second intervals.
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what is passice solar heating
Answer:
Using the sun's energy to heat a building; the windows, walls, and floors can be designed to collect, store, and distribute solar energy in the form of heat in the winter (and also to reject solar heat in the summer).
Lemme know if this helped :D!
a system of putting the sun's energy to use without requiring mechanical devices to distribute the collected heat.
The second question pls
Answer:
480 J/kg/°C
Explanation:
To find the heat capacity of the metal, we must first find the heat lost by the metal, which means we must find the heat gained by the water.
Heat gained by water:
q = mCΔT
q = (0.150 kg) (4200 J/kg/°C) (20°C - 15°C)
q = 3150 J
Heat lost by metal:
q = mCΔT
-3150 J = (0.100 kg) C (15°C - 80°C)
C ≈ 480 J/kg/°C
Explain the difference between rotation and revolution.
Answer:
When an object turns around an internal axis (like the Earth turns around its axis) it is called a rotation. When an object circles an external axis (like the Earth circles the sun) it is called a revolution.
Rotation: Earth’s rotation is why we have day and night (it turns on its axis)
Revolution: Earth’s revolution is what we base our years after (the Earth revolving around the sun)
A frog leaping upward off his lily pad instead of continuing on in a straight line . Which law is it ?
Answer:
I think it's Law of Motion.
Explanation:
Hope my answer has helped you!
I believe it is the Law of motion. The frog leaping upward off his lily pad is law of motion
How do radiography and sonography compare?
a.Each technique increases the risk of developing cancer.
b.Radiography uses X-rays, but sonography uses radio waves.
c.Each technique uses mechanical waves.
d.Radiography uses ionizing radiation, but sonography does not.
Answer:
D.Radiography uses ionizing radiation, but sonography does not.
Explanation:
Radiography is the process of using x-rays or gamma rays to capture images showing internal parts of the human body for medical examinations.X-rays are commonly used in this process.x-rays are categorized as a cancer causing agent thus exposure to such rays could cause development of cancer.In sonography, high frequency sound waves are used. There is no exposure to any ionization radiation like in radiography.
Any help is appreciated!
Answer:
a
Explanation:
Name four wave properties that are common to all members of the electromagnetic spectrum?
Answer:
1.transfer energy from one place to another.
2.can be reflected.
3.can be refracted .
Explanation:
I only know that much
The four common properties of waves in the electromagnetic spectrum are wavelength, frequency, amplitude, and speed. These properties are integral to defining how electromagnetic waves behave and are used in technological applications.
Four wave properties that are common to all members of the electromagnetic spectrum include:
Wavelength: This is the distance between two consecutive peaks or troughs of the wave. Different parts of the electromagnetic spectrum have different wavelengths, from short gamma rays to long radio waves.
Frequency: Refers to the number of wave cycles that pass a given point per unit time. Frequency and wavelength are inversely related by the speed of light.
Amplitude: This represents the height of the wave peaks, corresponding to the intensity of the radiation.
Speed: All electromagnetic waves travel at the speed of light in a vacuum, which is approximately 299,792,458 meters per second (c).
These properties are essential for understanding how electromagnetic waves interact with matter and how they are utilized in various applications.
Identify the part of a wave shown here
IMAGE BELOW
The bottom of this wave is called the Trough.
A. An open parallel circuit
B. An open series circuit
C. A closed parallel circuit
D. A closed series circuit
Answer: Open Series Circuit
Explanation: In a Series Circuit everything is connected together, but in Parallel Circuit it is not, it's Parallel R1, R2, etc.
The question related to understanding open and closed as well as series and parallel circuits in physics. In series circuits, current will not flow if there's an open connection, while in parallel circuits, it can still flow through other branches. Household electrical systems typically employ both series and parallel circuits for efficiency and functionality.
Explanation:The student's question pertains to the behavior of electrical circuits, specifically the difference between open and closed circuits, as well as series and parallel configurations. An open circuit is one where the path for the electric current is interrupted, preventing current from flowing. This can occur in both series and parallel circuits. Conversely, a closed circuit is one where the path for the current is complete, allowing the current to flow unimpeded. This too can happen in both series and parallel circuits.
In a series circuit, all components are connected end-to-end to form a single path for current flow. If any component is disconnected, creating an open circuit, no current will flow through the circuit. In a parallel circuit, the components are connected alongside each other with their own separate paths for current. If one branch is open, current can still flow in the other branches. Therefore, choice (B), an open series circuit, will not allow the flow of current, but choice (C), a closed parallel circuit, and choice (D), a closed series circuit, will allow current to flow.
Looking at household electrical systems, a combination of series and parallel circuits is often used for efficiency. For example, a house's lighting system may use parallel wiring to ensure that if one light bulb fails, the others continue to operate. Similarly, complex appliances like a washing machine may use both types of circuits to control different components accurately.
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The largest source of available freshwater on Earth is _____.
lakes
rivers
aquifers
ice caps
Answer:
The correct answer is ice caps.
Explanation:
Ice caps are the largest source of available freshwater on Earth; especially in Antarctica.
Answer:
ice caps is the correct answer.
Explanation:
The largest source of available freshwater on Earth is ice caps.
Freshwater is a naturally occurring water and concentration of the dissolved salts is low.
Fresh water carries water in ice caps as the largest sources and water in glaciers, ponds, lakes, streams, rivers, ice sheets.
Antarctica contains 90% of the fresh water on the Earth's surface but it is iced in the form of the ice caps.
SOMEONE PLS HELP ME ASAP!!!!!!!!!!
Answer:
Greatest-A Middle-B Last-C
What is the weight of a basketball with a mass of 0.5 kg
W = 4.9N. The weight of a basketball with a mass of 0.5Kg is 4.9N.
The weight of an object is the force of gravity on the object and can be defined as the product of the mass by the acceleration of gravity, w = mg.
W = (0.5Kg)(9.8 m/s²) = 4.9N
The weight of the basketball is calculated by multiplying the mass of the ball by the acceleration due to gravity. The gravitational potential energy is calculated using the height of the ball above the ground when the player is about to shoot.
Explanation:The weight of a basketball with a mass of 0.5 kg can be found by using the formula for weight (W = mg), where m is mass and g is the acceleration due to gravity (approximately 9.81 m/s2 on Earth). To calculate the gravitational potential energy (GPE) of the netball when the player is about to shoot, the formula for potential energy (GPE = mgh) is used, where h is the height of the ball above the ground. The ball's mass is given as 0.5 kg, and from the provided information, the total height (h) when she is about to shoot is the sum of her height and the distance the ball is held above her head (1.7 m + 0.5 m), which totals to 2.2 m. Therefore, the gravitational potential energy at that moment is GPE = 0.5 kg × 9.81 m/s2 × 2.2 m.
What would happen if the producer population were wiped out completely?
A First level consumers would obtain energy from second level consumers.
B There would be no energy available for consumers.
C First level consumers would increase in number
D There would be more energy available for consumers.
Answer:
B. There would be no energy available for consumers
Explanation:
The producers are the basis and foundation of all ecosystems. If something dramatic happens to the populations of producers and they are wiped out, then the ecosystems will crumble and nothing will be left of them. The reason for this is that the producers are the ones that produce the energy, and they are the ones that are the food source, thus energy source for the consumers. Once they are gone, the organisms that consumed the producers will starve to death. The predators will have lot of food from the dying prey, but that will only last for a couple of weeks, and after that they will starve to death as there will be no more food left for them.
12. Sarah walks 2 kilometers north from her house to the grocery store. Then, she leaves the grocery store and walks 3 kilometers further north to her grandma’s house. She finally leaves her grandma’s house and walks home. b. What is Sarah’s distance? a. What is Sarah’s displacement?
a. distance: 10 km
The distance covered is equal to the sum of the distance of each part of the journey.
In this case, Sarah's trip consists of three parts:
- 2 km north from the house to the grocery store
- 3 km north to grandma's house
- 5 km back to reach home
So the distance covered is the sum of all these parts:
d = 2 km + 3 km + 5 km = 10 km
b. displacement: 0
Instead, displacement is defined as the distance (measured in a straight line) between the final point of the motion and the initial point of the motion. So displacement does not depend on the path taken by the object, but only on the final and initial position.
Here we have:
- Final position of Sarah's journey: home
- Initial position of Sarah's journey: home
So, the displacement is zero, because the final point corresponds to the initial point.
Which circuit-A or B-represents a series circuit? Explain your answer.
Circuit-A is a series circuit. There's only one road that electrons can take to get from one battery terminal to the other one. There's no point in the circuit where an electron has to decide which path to take.
Circuit-B is a parallel circuit. At each of the two 'dimples' across the top, an electron has a choice: It can turn right and go through a bulb, OR keep going straight on to the NEXT bulb.
Circuit-C is a series circuit. There's only one road that electrons can take to get from one battery terminal to the other one. There's no point in the circuit where an electron has to decide which path to take.
Circuit-D is called a "series-parallel circuit", because it has characteristics of both kinds. Devices #2 and #3 are in parallel, but Device #1 is in series with them.
Circuit-E is a parallel circuit. There are two places across the top where an electron has a choice: It can decide to take a right turn and go through the bulb OR keep going straight on to the next bulb.
How is an image produced by a plane mirror different than an image produced by a convex mirror?
A It is smaller than the object.
B It is the same size as the object.
C It is inverted
D It is upright.
Answer:
it is the same size as the object ( B )
Explanation:
An image formed/produced by a plane mirror is different than an image produced by a a convex mirror because image produced by a plane mirror appears the same size as the object while the image produced by a convex mirror does not appear is smaller than the object.
images produced by a convex mirror is usually smaller than the original object, they are upright and they are virtual. they also seem to appear behind the convex mirror. while plane mirror produce images of same size as the object.
A copper sphere was moving at 25 m/s when it hit another object. This caused all of the KE to be converted into thermal energy for the copper sphere. If the specific heat capacity of copper is 387 J/(kg ⋅ C°), what was the increase in temperature?
0.23 C°
0.81 C°
1.3 C°
2.1 C°
Answer:
[tex]\Delta T = 0.81 ^oC[/tex]
Explanation:
As we know by energy conservation
All its kinetic energy will convert into thermal energy to raise its temperature
[tex]\frac{1}{2}mv^2 = ms\Delta T[/tex]
now divide both sides by mass of the object
[tex]\frac{1}{2}v^2 = s\Delta T[/tex]
so change in temperature is given as
[tex]\Delta T = \frac{v^2}{2s}[/tex]
[tex]\Delta T = \frac{25^2}{2\times 387}[/tex]
[tex]\Delta T = 0.81^oC[/tex]
To calculate the increase in temperature for the copper sphere, one needs to equate its kinetic energy to the heat gained by the copper and solve for the temperature increase using the copper's specific heat capacity. Without knowing the mass of the sphere, the calculation cannot be completed.
Explanation:Understanding the Increase in Temperature of a Copper Sphere
When a copper sphere moving at 25 m/s hits another object and all its kinetic energy (KE) is converted into thermal energy, the increase in temperature can be calculated using the equation for kinetic energy and the formula for heat transfer involving specific heat capacity:
KE = ½ * m * v2
Where m is the mass of the sphere and v is the velocity. Once the kinetic energy is known, his is linked to the thermal energy (ΔQ) gained by the copper sphere:
ΔQ = m * c * ΔT
Here, c is the specific heat capacity of copper, and ΔT is the temperature increase we need to find. Given that the entire KE is converted to thermal energy, we set ΔQ equal to KE and solve for ΔT, which directly gives us the increase in temperature of the copper sphere.
Without the mass of the copper sphere, we cannot determine the exact temperature increase from the information provided. However, if we have the mass, we can use the above equations to find the numerical value of the increase in temperature.
PLEASE HELP!!! Find the mass
Recoil = Cannon Ball / cannon x speed of cannon ball.
7.42 = 32.5/ cannon x 388
7.42 = 32.5 x 388 / cannon
7.42 = 12,610 /cannon
7.42 x cannon = 12610
Cannon = 12610/7.42
Cannon = 1699.46 kg. ( Round answer as needed)
A diver of weight 500N stands at the end of a springboard that is 2.0 m long and is fixed at
point P.
2.0m
The springboard has a weight of 500 N. The centre of mass of the springboard is in the centre of
the board.
What is the total moment about point P of the diver and the board?
A 500NM
B 750Nm
C 1000 Nm
1500 Nm
the answer is (c) because if you say
[tex]moment = f \times d| = 500n \times 2.0m = 1000nm[/tex]
The total moment about point P of the diver and the board is 1000N.m. The correct option is C.
What is moment of force?The equal and opposite force acting at a point from the axis of rotation is called the moment of force.
M = F x r
Given is the force = 500N and the distance between diver and board r =2m, the moment will be
M = 500 x 2
M = 1000N.m
Thus, the correct option is C.
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a magnet has a 20 cm magnetic field if a piece of metal is 18 cm from the magnet will it be attracted or not
Yes, a metal piece of 18cm away can be attracted by a magnet that has 20cm of magnetic field.
The magnet is having a magnetic field of 20cm. And the Metal piece is 18cm far from the magnet. Usually, magnetic fields decrease in strength as you move farther away from the magnet. The strength of the attraction will depend on various factors, including the strength of the magnet, the properties of the metal, and the orientation of the magnet
However, since the metal is within the 20 cm range of the magnet's magnetic field, it experiences some level of attraction.
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Final answer:
A piece of metal 18 cm away from a magnet, which has a 20 cm magnetic field, will be attracted to the magnet because it falls within the magnet's magnetic field range, where magnetic forces are strong enough to attract ferromagnetic materials.
Explanation:
If a magnet has a 20 cm magnetic field and a piece of metal is 18 cm from the magnet, the piece of metal will indeed be attracted to the magnet. This is because the piece of metal falls within the magnet’s magnetic field range. The magnetic field is the region around a magnet where magnetic forces are exerted on ferromagnetic materials like iron, nickel, and cobalt. Since the piece of metal is closer than the full extent of the magnetic field (20 cm), it falls within the sphere of influence where it can be attracted to the magnet.
Magnetic fields are invisible but can be visualized through the use of iron filings or other methods. They illustrate how magnetic forces decrease with distance. However, within its range, a magnet can exert a force sufficient to attract compatible materials. Hence, a piece of metal located 18 cm from a magnet, within the 20 cm range of its magnetic field, will be subject to this magnetic force and drawn towards the magnet.
What do radio waves and microwaves have in common?
A) Both have higher frequencies than visible light
B) Both are located next to visible light on the spectrum.
C) Both are located to the right of visible light on the spectrum
D) both have shorter wavelengths than visible light
Answer: C) Both are located to the right of visible light on the spectrum
Explanation:
BECAUSE....
Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They travel with the speed of light.
Both radio and microwaves are electromagnetic waves which are adjacent to each other in electromagnetic spectrum towards lower frequency and higher wavelength.
The relationship between wavelength and frequency of the wave follows the equation:
[tex]\nu=\frac{c}{\lambda}[/tex]
where,
v = frequency of the wave
c = speed of light
[tex]{\lambda}[/tex]= wavelength of the wave
* Hopefully this helps: ) Mark me the brainliest:)!!
~234483279c20~
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡⊕
Answer:
C.) Both are located to the right of visible light on the spectrum
↓↓↓
Explanation:
Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They travel with the speed of light.
Both radio and microwaves are electromagnetic waves which are adjacent to each other in electromagnetic spectrum towards lower frequency and higher wavelength.
The relationship between wavelength and frequency of the wave follows the equation:
where,
v = frequency of the wave
c = speed of light
= wavelength of the wave ↑↑↑
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Hope I helped!!! ∞
~Nuha
<3
Help please? Thanksssss
Answer:
250 N
Explanation:
The acceleration of the 50 kg cart under 750 N of force is:
F = ma
750 N = (50 kg) a
a = 15 m/s²
To accelerate from 13 m/s to 17 m/s takes:
v = at + v₀
17 m/s = (15 m/s²)t + 13 m/s
t = 4/15 s
To accelerate in 3 times as many seconds (t = 4/5 s):
17 m/s = a (4/5 s) + 13 m/s
a = 5 m/s²
So the force is:
F = ma
F = (50 kg) (5 m/s²)
F = 250 N
You could also have reasoned this without the calculations. 3 times the time means 1/3 the acceleration which means 1/3 the force.
A soil sample contains 55 percent sand, 25 percent clay, and 20 percent silt. What type of soil is present in the sample?
a.clay
b.silty loam
c.silty clay loam
d.sandy clay loam
Answer: D (sandy clay loam)
Explanation:
It is because it is 55 percent sand, and 25 percent clay, so it has to be more sandy than silty. Much of it is by sand, so it is sandy. Loam is a fertile soil of clay and sand, so it is D.
Answer:
D. sandy clay loam
Explanation:
This soil type is normally made up of sand along with varying amounts of silt and clay.