PHYSICS HIGH SCHOOL

A girl rides her moped 5.0 km east and then turns around and rides 2.0 km west. The entire trip takes 15 minutes. What are her average speed and velocity?

Answers

Answer 1

Answer:

The girl's average speed is 28 km/h, and her average velocity is 8 km/h to the east.

Average speed and average velocity

To calculate the average speed and average velocity, we'll use the following formulas:

Average Speed = Total Distance / Total Time

Average Velocity = Total Displacement / Total Time

Given information:

Distance traveled east = 5.0 km
Distance traveled west = 2.0 km
Total time = 15 minutes = 15/60 hours = 0.25 hours

Total Distance = Distance east + Distance west = 5.0 km + 2.0 km = 7.0 km

Total Displacement = Final position - Initial position = 2.0 km east

Average Speed = 7.0 km / 0.25 hours = 28 km/h

Average Velocity = 2.0 km east / 0.25 hours = 8 km/h (east)

So, the girl's average speed is 28 km/h, and her average velocity is 8 km/h to the east.

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Answer 2

Answer:

Answer; lol im taking that physics exam as well, a m f confused i cant find the answers on the internet

Explanation: #ripaldinepride

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Martha and Mary are trying to move an old toy Barbie Jeep that is broken up a hill. Martha is applying 35 N of force and Mary is applying 20 N of force. What is the net. force being applied to the box and is it balanced or unbalanced

Answers

Answer: Net Force is 15 N towards Martha

Its an unbalanced force

Explanation:

You should vary your ____________ based on the size and noise level of the venue you are speaking in.

Answers

I think, the best word to fill the blank is "voice". You should vary your voice based on the size and noise level of the venue you are speaking in. Because when you are speaking you use your voice to be heard. Also, it is the only thing you can vary depending on the size and the noise when speaking in a certain location.

Answer:

Explanation:

List all physical changes.

Answers

Physical changes refer to alterations in the properties or characteristics of matter without changing its chemical composition. Some examples of physical changes include changes in state, size, shape and color.

Changes in state are common physical changes that occur when matter transitions between solid, liquid, or gas phases. This change occurs due to a change intemperature or pressure. For example, water freezing into ice or boiling into steam are examples of changes in state.

Changes in size, shape, and texture occur when matter undergoes physical alterations without any changes in its chemical composition. For instance, cutting a piece of paper into small pieces, hammering a metal sheet to make it thinner, or molding clay into a different shape are all examples of physical changes.

Changes in color are also physical changes. They occur when the light-reflecting properties of a material change due to a physical alteration. For instance, when copper is exposed to air, it turns green due to a chemical reaction, but when iron rusts, it changes color due to a physical change in its surface.

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Manuel releases a pendulum bob. The drawing shows its path. At which point does the pendulum bob have the most gravitational potential energy? a. no differences
b. point D
c. point B
d. point C

Answers

The right answer for the question that is being asked and shown above is that: "c. point B." Manuel releases a pendulum bob. The drawing shows its path. At point B that the pendulum bob have the most gravitational potential energy.

A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. Which best explains why the needle moves away from the pole when it comes close to a current-carrying wire?-Current within the wire weakens the magnetic force of the pole.
-Magnetism surrounding the wire weakens the magnetic force of the pole.
-Magnetism surrounding the wire draws the needle toward the wire.

Answers

Answer

-Magnetism surrounding the wire draws the needle toward the wire.

Explanation
When a compass needle is placed near a conductor carrying current, it deflects to one side.
This happens because the magnetic field due to the needle interact with electric fields around the conductor carrying carrying current resulting to a force that makes the needle to deflet.
The best answer that suits the question asked is -Magnetism surrounding the wire draws the needle toward the wire.

A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. The best explanation why the needle moves away from the pole when it comes close to a current-carrying wire is Magnetism surrounding the wire draws the needle toward the wire.

Where does sugar enter the blood?

Answers

After we eat, blood sugar concentratons rise, the pancreas releases insulin automatically so that the glucose enters cells, as more and more cells receive glucose, blood sugar levels come down to normal again. Exces glucose is stored as glycogen in the liver and muscles.Hope this helps.

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