PHYSICS HIGH SCHOOL

What is the definition of uniform motion?

Answers

Answer 1
Answer:
Uniform motion means no part of the motion is changing.

The two parts of motion are . . . speed and direction.

If neither part is changing, that means constant speed in a straight line.

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Every charged particle produces ?
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A boat is headed due east across a river at a velocity of 25 meters/second with respect to the water. The velocity of the river current is 2.7 meters/second due north. What is the angle at which the boat will deviate from its original path?
Which of the following is NOT an example of work?a. a windmill turning in the wind b. a person sliding a box across the floor c. a metal bar bracing a leaning brick wall d. an air bag deploying in an automobile wreck
A young man sets a goal to compete in a marathon in two weeks. He started training last week by exercising three to four times a week with his friend. After each training session he writes his daily experiences to assess problems that may hinder his achievements. What aspect of his fitness program could keep him from achieving his goal?

The resultant vector of two particular displacement vectors does not equal the sum of the magnitudes of the individual vectors.Decribe the directions of the two vectors

Answers

If the resultant magnitude of the sum of two vectors is not
the sum of their individual magnitudes, then they are not both
acting in the same direction. 

That's all you really know about them.  They can be in ANY two
different directions; just not both in the same direction. 

If they were both in the same direction, then the magnitude of
their vector sum would be the sum of their magnitudes, and
the direction of their vector sum would be the same direction
as both of them.

A shorter electromagnetic wave is _____. more powerful less powerful hotter colder

Answers

Answer

more powerful 

Explanation
Electromagnetic waves are waves that do not require material medium for propagation. For example x-rays, UV and gamma rays.

From the wave equation, V= λf, when the wavelength is short the frequency is high. 
Frequency determines the intensity of the wave. When high the frequencies are high the waves has more penetrating power, hence more powerful. 

Answer:

More powerful

Explanation:

I answered it and got it right.

Which of the following contains the most thermal energy?a. a cup of hot water
b. a cup of cold water
c. a hot tub full of hot water
d. a large bucket of hot water

Answers

the answer would be c.

Which form of energy increases when a spring is compressed?chemical potential energy

elastic potential energy

kinetic energy

radiant energy

thermal energy

Answers

When a spring is compressed, its potential energy is increased. Specifically, the form of potential energy that increases is called elastic potential energy. The correct answer is "elastic potential energy."

When a spring is compressed, work is done to compress the spring, and this work is stored in the spring as potential energy. The potential energy is stored in the spring in the form of potential energy associated with its deformation, which is called elastic potential energy. When the spring is released, the stored potential energy is converted back into kinetic energy, which causes the spring to expand or oscillate.

To learn about Kinetic Energy click:

brainly.com/question/26472013

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elastic potential energy. its easy, think of it like this. when your shooting a rubber band at them, when you stretch the rubber band it increases the potential energy, and when you let go the potential energy converts into kinetic energy which makes it move. when a rubber band snaps, it means it cant handle all the pressure and potential energy.

Explain what is meant by “field” and compare the properties of gravitational, electric, and magnetic forces in terms of particles affected, factors affecting the magnitude, and their relative strengths.

Answers

Field in this context refers to a region of the space to which corresponds a value.

There is a gravitational field around the earth, because a mass m placed at any point around the earth will be atracted (gravitational force) by it.

There is an electric field in a point when a charge placed there feels an electric force.

The gravitational field is proportional to the value of the mass of the object that produces it.

The electric field is proportional to the magnitude of the charge of the particle that produces it.

The gravitational field is always attractive. The electric field may be attractive or repulsive.

Both fields are proportional to the inverse of the squared distance.

The magnetic field is created when a charge is in movement,i.e a charge in movement will create a magnetid fiedl around it that will act and create a magnetic force over other charge also in movement.

The magnetic field is proportional to the product of the charge times its velocity and inversely proportional to the squared distance. The force generated my be attractive or repulsive.

What happens to water when it changes to ice?Its density increases.

Its density decreases.

Its mass increases.

Its mass decreases.

Its volume increases.

Its volume decreases.

Answers

There are two answers to this:

  • Its density decreases
  • Its volume increases

You notice that ice floats on water, this means that its density is less. The mass remains the same because you did not add or remove anything. But what causes the density to decrease then? For density to change, there needs to be a change in either the volume or the mass of the object. Density is calculate by mass/volume. Since the mass did not change, the volume must have. So in this case, the volume increases. Hence, this is what causes it to be less dense.

Answer

B and E

Explanation:

water molecules are connected with each other through hydrogen bonding

 
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