Faraday's law states that voltage cannot be increased by moving a magnet towards a coil.
a. true
b. false
The answer is false.
Sam is building a model of an antique car. The scale of his model to the actual car is 1:10. His model is 12 1 2 inches long. How long is the actual car? The length of the actual car is inches.
An iron nail is made up of particles. What is true about the particles?
Answer: " The correct answer is "They stay in place and vibrate." For the other answer options, iron nails are solid particles and in a solid, molecules are packed together (i.e. the space between them is very small) and do not move all over the place because of a strong force of attraction between them, and it keeps its shape and stays in place and vibrate.
Explanation: What is true about the particles?" The correct answer is "They stay in place and vibrate." For the other answer options, iron nails are solid particles and in a solid, molecules are packed together (i.e. the space between them is very small) and do not move all over the place because of a strong force of attraction between them, and it keeps its shape and stays in place and vibrate.
Answer: "They stay in place and vibrate." For the other answer options, iron nails are solid particles and in a solid, molecules are packed together (i.e. the space between them is very small) and do not move all over the place because of a strong force of attraction between them, and it keeps its shape and stays in place and vibrate.
Explanation:
airplane releases a ball as it flies parallel to the ground at a height of 195m, the ball lands on the ground at exactly 195m from the release piont, calculate the speed v of the plane
Answer:
Velocity of plane = 30.93 m/s
Explanation:
Considering vertical motion of ball
Initial velocity, u = 0 m/s
Acceleration , a = 9.81 m/s²
Displacement, s = 195 m
We have equation of motion s= ut + 0.5 at²
Substituting
s= ut + 0.5 at²
195 = 0 x t + 0.5 x 9.81 x t²
t = 6.31 seconds
Now considering horizontal motion of ball
Acceleration , a = 0 m/s²
Displacement, s = 195 m
Time, t = 6.31 s
We have equation of motion s= ut + 0.5 at²
Substituting
s= ut + 0.5 at²
195 = u x 6.31 + 0.5 x 0 x 6.31²
u = 30.93 m/s
Velocity of plane is horizontal initial speed of ball = 30.93 m/s
Velocity of plane = 30.93 m/s
If 20 beats are produced within one second, which of the following frequencies could possibly be held by two sound waves traveling through a medium along a common path at the same time
A. 22 Hz and 42 Hz
B. 47 Hz and 55 Hz
C. 38 Hz and 63 Hz
D. 18 Hz and 26 Hz?
Answer:
A. 22 Hz and 42 Hz
Explanation:
When two waves of slightly different frequency meet each other, they produce an interference pattern called beat. The frequency of this beat is equal to the absolute value of the difference between the individual frequencies of the two waves:
[tex]f_B=|f_1-f_2|[/tex]
In this problem, we have 20 beats per second, so the beat frequency is
[tex]f_B = \frac{20}{1 s}=20 Hz[/tex]
Therefore, we have to find the pair of waves whose frequency difference is 20 Hz. Let's analyze each choice:
A. [tex]f_B = |22 Hz - 42 Hz|=20 Hz[/tex] --> YES
B. [tex]f_B = |47 Hz - 55 Hz|=8 Hz[/tex] --> NO
C. [tex]f_B = |38 Hz - 63 Hz|=25 Hz[/tex] --> NO
D. [tex]f_B = |18 Hz - 26 Hz|=8 Hz[/tex] --> NO
So, the correct choice is A.
Provide two examples of things that apply to both relative and absolute dating.
Read “Solar Basics” on the Energy Kids website. Specifically, read text under “Two limitations of solar energy”. Use the information to answer the question. What factors affect the amount of solar energy that reaches the Earth’s surface?
Sample Response: The amount of solar energy that reaches the Earth’s surface depends on the weather, location, and time of year.
PLZ! RATE AND THANKS!
F = Gm2/r2 G = ? I need help asap
Answer:
Universal Gravitational Constant
Explanation:
Universal Gravitational Constant or G is used in calculating the gravitational force between two objects. The force (F) is given by,
[tex]F = \frac{GMm}{r^{2}}[/tex]
where,
M and m = mass of two objects
r = distance between the centers of the two objects
The value of G with an accuracy of 99% was first calculated by Henry Cavendish in 1798.
The value of [tex]G = 6.67 \times 10^{-11}[/tex] m³kg⁻¹s⁻²
Answer:
G = Fr2/m2
Explanation:
we have to isolate G
multiply r2 on both sides
Fr2 = gm2
and then divide m2
Fr2/m2= G
20 points! science
A heating element being placed in one end of an aquarium can heat the whole aquarium because of heat transfer by convection conduction radiation evaporation
What product of the greenhouse effect could lead to more extreme weather events?
Imagine you are taking a road trip! Select a destination and navigate the trip. Answer the following questions in one or more complete sentences: Where will you go on your trip? Imagine you are taking a road trip! Select a destination and navigate the trip. Answer the following questions in one or more complete sentences: Where will you go on your trip?
I chose to travel from New York City to Miami, traveling along Interstate 95 South. The journey is about 1,280 miles and takes around 19 hours by car. Essential items include a GPS, emergency car kit, snacks, and water.
For my road trip, I will choose to travel from New York City to Miami, Florida. To plan the trip, I first identify my starting point, New York City. I will take Interstate 95 South, which provides a direct route to Miami. Along the way, I will pass through several major cities including Philadelphia, Baltimore, Washington D.C., and Savannah. To ensure a safe trip, I will monitor my car's fuel levels, engine performance, and be prepared to reroute if necessary.
The journey from New York City to Miami covers roughly 1,280 miles, which can take about 19 hours of driving. Essential items to pack include a GPS for navigation, an emergency car kit, and sufficient snacks and water. Comfort items might include a travel pillow and entertainment options like books or music.
what is the difference between a total solar eclipse and a partial
Whenever possible, these types of power plants should be built because they generate virtually no pollution.
A.biomass power plants
B.geothermal power plants
C.nuclear power plants
D.natural gas power plants
Geothermal facilities are very expensive to build and are only able to be built in areas with the correct geology. These power plants operate virtually emission and pollution free, and they do not require fuel or waste to be shipped to or from the facility.
The second option would be nuclear power plants. However, nuclear power plants can leave behind radiation and radiated waste which is considered pollution.
Biomass power plants, geothermal power plants, and nuclear power plants are types of power plants that generate virtually no pollution.
Explanation:Biomass power plants, geothermal power plants, and nuclear power plants are types of power plants that generate virtually no pollution. Biomass power plants burn organic matter (biomass) from plants to create electricity, while geothermal power plants use the natural heat flow from the Earth's core to generate steam that turns turbines and produces electricity. Nuclear power plants use fission to generate electricity without emitting air pollutants or CO2. However, it is important to note that nuclear power plants produce radioactive waste that needs to be safely stored for an extended period of time.
A model rocket with a mass of 0.181 kg is launched into the air with an initial speed of 92 m/s. How much kinetic energy will the rocket have at a height of 164 m? Assume there is no wind resistance.
303 J - 747 J - 634 J - 444 J
I have tried taking the initial KE with 1/2*.181*92^2 and subtracted the final potential energy .181*9.8*164. This gets me 475, which isn't any of the choices. I picked 444 J since it was the closest, but it was wrong.
Which of the following quantities is a vector in character?
electric field
electric charge
electric energy
electric potential difference
The correct option is Option A (Electric Field). Among the given options, the electric field is a vector quantity. The other quantities such as electric charge, electric energy, and electric potential difference are all scalars.
Among the given quantities, the electric field is a vector quantity, while the others are scalars. A vector quantity has both magnitude and direction, making it possible to be represented by arrows indicating the direction and strength of the field.
Key differences :
Electric field: A vector quantity represented by E, which denotes force per unit charge and has both magnitude and direction.Electric charge: A scalar quantity representing the amount of electric charge.Electric energy: A scalar quantity representing the potential energy in the system.Electric potential difference: A scalar quantity representing the difference in electric potential between two points.For example, the electric potential of a point charge is given by V = kQ/r, which is a scalar, whereas the electric field is defined as the force per unit charge and is a vector.
A deciliter is how many times larger than a milliliter
You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 17 m/s2. After 30 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect any effects due to air resistance.) The rocket eventually stops rising and then falls back to the ground. You want to get a sample of air that is 23 km above the ground.
On which factor coefficient of cubical expansion depends?
Why should we use the metric system in science?
The metric system is used in science because it is universally adopted, easy to convert, and flexible across large and small numerical ranges. Every unit in the metric system increases by a factor of ten, an advantage not found in the U.S customary units. Metric units are easily scalable across different fields, making it a practical choice in science.
Explanation:In the realm of science, it is more common to use the metric system, a measurement system adopted by most countries, except the United States. A core advantage of adopting this system is that every unit increases multiplicatively by a factor of ten. The base units of the metric system are the meter for length, kilogram for mass, and second for time.
One significant advantage of such system is its flexibility in scaling across extremely large or small numerical ranges simply through the use of an appropriate metric prefix, making it universal across various scientific and professional fields. For instance, in construction, one would most likely deal with meters, whilst in aviation, kilometers are more suitable, and nanometers find their use in optical design.
Unlike in the system of U.S customary units where conversions between various units might be complicated, the metric system offers simple conversions by merely shifting the decimal place of a number due to the sequential powers of 10 of the metric prefixes.
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Steel is a mixture of iron and carbon. It can be separated into iron and carbon by melting it. What is steel?
A. A compound
B. An element
C. A molecule
D. An alloy
What can iron filings sprinkled on a piece of paper demonstrate?
The contamination that results from the spread of bacteria from meat to vegetables is called
Answer:
Cross contamination.
Step-by-Step Explanation:
The contamination that results from spread of bacteria from meat to vegetable is called cross contamination which means the bacteria from one type of food transferred to other food which eventually spoil the food.
This happens by direct contact of two types of food.
The contamination that results from the spread of bacteria from meat to vegetables is called Cross-contamination.
Cross-contamination is the movement of bacteria or other pathogenic microbes from one food item or surface to another, which can result in the spread of diseases.
In the case of meat and vegetables, cross-contamination can happen if bacteria from uncooked or carelessly handled meat come into contact with vegetables, either directly or through shared surfaces. This may occur while handling, storing, or preparing food.
Using separate cutting boards and utensils for raw meat and raw vegetables, washing your hands completely after handling raw meat, and storing meat and vegetables separately in the refrigerator are all critical ways to reduce the risk of cross-contamination.
Hence, the contamination that results from the spread of bacteria from meat to vegetables is called cross- contamination.
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some ancient civilizations used units of measure based on the length of certain seeds. what kind of problems might you expect with such a system ?
Hypothesize whether you think each of the following substances will be an acid, a base, or neutral:
Bleach —
Detergent —
Eye drops —
Lemon juice —
Tea —
Bleach is a base. Detergent is a base. Eye drops are a neutral. Lemon juice is an acid. Tea is an acid.
What is Acid ?Acid is any material that when dissolved in water has a sour taste, alters the colour of some indicators (blue litmus paper turns red, for example), combines with some metals (like iron) to release hydrogen, reacts with bases to produce salts, and catalyses various chemical reactions. Acids are examples of both organic chemicals that belong to the carboxylic acid, sulfonic acid, and phenol groups as well as the inorganic substances known as the mineral acids, such as sulfuric, nitric, hydrochloric, and phosphoric acids. These materials contain one or more hydrogen atoms, which are discharged as positively charged hydrogen ions when they dissolve in a solution (see the Arrhenius hypothesis).
The Brnsted-Lowry theory and the Lewis theory provide broader definitions of an acid that encompass chemicals that display typical acidic behaviour as pure compounds or when dissolved in solvents other than water.
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If the velocity of an object changes from 65 m/s to 98 m/s during a time interval of 12 s, what is the acceleration of the object?
A. 13.58 m/s
B. 2.75 m/s
C. 33 m/s
D. 5.42 m/s
Is the balancing egg video based on science or pseudoscience? Explain why.
I put a text version pic of what was in the video.
An object is thrown with an initial velocity v0 forming an angle θ with an inclined plane, which a In turn it forms an α-angle α with a horizontal plane.
A) Find the distance X from the launch point to the point where the object falls. X = F (v0, θ, α, g)
B) Find the distance for v0 = 20m / s, θ = 53o , α= 36 ° , g = 9.8m / s2
A galaxy whose stars are arranged in a disk with arms that surround a central bulge is a _____ galaxy.
A.irregular
B. elliptical
C. cluster
D.spiral
E.group
D. Spiral is the answer to the question
give an example of something that is cyclic and non - cyclic
A cyclic process is a process in which the system returns to its original state at the end of the cycle. A non-cyclic process is a process in which the system does not return to its original state at the end of the cycle. An example of a cyclic process is the four-stroke gasoline engine, and an example of a non-cyclic process is irreversible processes.
Explanation:A cyclic process is a process in which the system returns to its original state at the end of the cycle. An example of a cyclic process is the four-stroke gasoline engine, which operates according to the Otto cycle. This cycle is a repeating sequence of processes that convert heat into work. On the other hand, a non-cyclic process is a process in which the system does not return to its original state at the end of the cycle. An example of a non-cyclic process is irreversible processes, which depend on the path and do not return to their original state.
A car traveling at speed of 24 m/s comes to stop at the red light how much time will it take for the car to stop if its acceleration is -8.0 M/S2
Answer:
The car take the time is 3.0 sec
Explanation:
Given that,
Speed = 24 m/s
Acceleration = -8.0 m/s²
We need to calculate the time
Using equation of motion
[tex]v = u+at[/tex]
Where, v = final velocity
u = initial velocity
a = acceleration
t = time
Put the value into the formula
[tex]0=24-8.0\times t[/tex]
[tex]t =\dfrac{24}{8.0}[/tex]
[tex]t = 3.0\ sec[/tex]
Hence, The car take the time is 3.0 sec.