The speed of light is about 3.00 × 105 km/s. It takes approximately 1.28 seconds for light reflected from the moon to reach Earth. What is the average distance from Earth to the moon?

Answers

Answer 1

Answer: Just to correct you - the speed of light is 3.0 x 10^5 km/sec and not 105 km/sec as given by you (maybe it was just a typing mistake from your end).

The average distance between earth and moon would be - 384,000 kms.

This is calculated by the formula -> Distance = Speed x Time.

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Humans can perceive infrared light with their eyes. True or false

Displacement is the change in velocity of an object.

True or false

Answers

Words less true are seldom if ever spoken.

False, it is the change in distance. Chance in velocity would be Δv

which is heavier a one ton box or a one metric ton box? How many pounds heavier is one than the other?

Answers

1 metric ton is bigger than 1 ton. 1 metric ton = 1.102311 tons or 2,204.622 pounds. on ton only = 2,000 pounds.

While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the speed of the tennis ball is km/h.

Answers

the answer is 11 km/h ... i just took the test

8 km/h I think good luck if it's wrong

Imagine that a car is traveling from your left to your right at a constant velocity. Which two actions could the driver take that may be represented as (a) a velocity vector and an acceleration vector both pointing to the right and then (b) changing so the velocity vector points to the right and the acceleration vector points to the left?

Answers

Answer:

(a). The speed of car will increases.

(b). The speed of car will decreases.

Explanation:

Given that,

A car is traveling from your left to your right at a constant velocity.

We need to find two actions could the driver take

Using given data

(a). If the velocity and acceleration of car to the right

It means the velocity and acceleration of car is in same direction then the speed of car will increases.

(b). If the velocity to the right and the acceleration to the left

It means the velocity and acceleration of car is in opposite direction then the speed of car will decreases.

Hence, (a). The speed of car will increases.

(b). The speed of car will decreases.

Which of the following is a form of mechanical energy?a. internal energy
c. gravitational potential energy
b. chemical potential energy
d. electrical energy

Answers

Gravitational potential energy is a form of mechanical energy.

What is Gravitational potential energy?

Gravitational potential energy is the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field.

If an object is at rest and doesn't involve elastic energy, then mechanicalenergy can be equal to gravitational potential energy.

To learn more about Gravitational potential energy here

brainly.com/question/3884855

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Okay so i believe that potential energy is mechanical but there are two answers with potential energy in it. Its a tough one but I think I would go with gravitational potential energy. Hope this helped!

What large gymnosperm is found in the tropics?

Answers

Gymnosperms are a plant group that share unique characteristics: they bear seeds however the seeds do not develop within an ovary. One large gymnosperm that grows in tropical regions, it is named as conifers. Conifers have about 558 living species. It is the most ecologically and economically essential group. Most conifers are trees which bear seeds within a cone.

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