3 years ago

What statement about gravity is true?

1 answer:

6 0

Gravity is the pull of an object that varies on the object's mass. Its the force that pulls us toward the Earth. For example, The Earth is very big compared to you, so you are attracted to it. A pencil, however, has little mass; Therefore it does not attract other objects to it.

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Kate is participating in a race.she ran 300 meters in 3 minutes.what is her average speed in m/min?

Lera25 [3.4K]

Answer:

Her average speed is: 100 m/min

Explanation:

Recall that the formula for average speed is given by:

Speed = Distance / time

Then in our case, this is

Speed = 300 m / 3 min = 100 m/min

8 0

3 years ago

What two factors could the students change to investigate how to increase and decrease the magnetic force between the paperclip

scoundrel [369]

..............................................A

4 0

3 years ago

What are dreams, where do they originate from, why do we have dreams, and are they psychic visions or something? Please explain

Slav-nsk [51]

Dreams are stories of images, emotions, and ideas that our mind make when we sleep. perhaps, we dream because of unconscious wishes and desires. they can be psychic visions, our dreams can predict the future.

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3 years ago

An astronaut floating alone in outer space throws a baseball. If the ball moves away at 20 m/s, the astronaut will:.

vitfil [10]

Answer:

Move the opposite direction ( at a lesser magnitude of velocity)

Explanation:

7 0

2 years ago

Atoms in a solid are in continuous vibrational motion due to thermal energy. At room temperature, the amplitude of these atomic

Bingel [31]

Answer:

10 m/s

Explanation:

Given:

Amplitude of atomic vibrations (λ) = 10⁻⁹ cm = 10⁻⁹ × 10⁻² m = 10⁻¹¹ m [1 cm = 10⁻² m]

Frequency of the vibrations (f) = 10¹² Hz

In order to find the atom's maximum speed, we need to make use of the formula that relates speed, frequency and wavelength of the vibration.

Therefore, the formula for maximum speed is given as:

$v=f\lambda$

Now, plug in the values given and solve for speed 'v'. This gives,

$v=(10^{12}\ Hz)(10^{-11}\ m)\\\\v=10^{12-11}\ m/s\\v=10\ m/s$

Therefore, the atom's maximum speed due to thermal energy provided is 10 m/s.

6 0

4 years ago