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3 years ago

Please help thanks ;)

Physics

2 answers:

Nikitich [7]3 years ago

8 0

Answer:b speed with displacement

Explanation:

notsponge [240]3 years ago

4 0

Answer:

B. Velocity is speed with displacement

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What did classical physics predict about electron flow as a result of light shining on a metal surface?

serious [3.7K]

The classical physics predicted about electron flow as a result of light shining on a metal surface is that D. The brighter the light, the fewer electrons would flow.

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4 years ago

Read 2 more answers

Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straigh

Lorico [155]

Answer:

The time save by Simpson is 25.8 minutes.

Explanation:

Given that,

Velocity of the car, v = 48 km/h

Distance covered by the car, d = 144 km

Let t is the time taken by the car. Speed of an object is given by distance covered per unit time. It is given by :

$v=\dfrac{d}{t}$

$t=\dfrac{d}{v}$

$t=\dfrac{144\ km}{48\ km/h}$

t = 3 hours

If the velocity is increased to 56 km/h to the east. Time taken is given by :

$t'=\dfrac{144\ km}{56\ km/h}$

t' = 2.57 seconds

The time save by Simpson increasing his average velocity is given by :

$\Delta t=t-t'$

$\Delta t=3-2.57$

$\Delta t=0.43\ hours$

$\Delta t=25.8\ min$

So, the time save by Simpson is 25.8 minutes. Hence, this is the required solution.

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4 years ago

Design a roller coaster.

Zarrin [17]

1. Because the cart on the coaster must get all of its power from this first hill.
2. It must be smaller because if it was bigger the cart would roll backwards without enough power.
3. an upward climb that is too steep.

I answered the first 3 but try to do the last two by yourself. They are very easy once you figure it out. Try searching the definition of the main points. :)

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3 years ago

Plzpzlpzlzplzplzplzpz this one also all questions

WINSTONCH [101]

Answer:

I didn't know these questions sorry

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3 years ago

An object on the moon will weigh 1/6th of what it does on earth but have the same mass. Why is that?

elena55 [62]

Answer:

Because the weight depends of the gravity

Explanation:

This is because weight and mass are different, in order to better understand this problem we will apply an example with real values, which will help us to determine a person's weight.

A man has a mass of 80 [kg] on Earth when measuring his weight he realizes that it is 784.9 [N] and on the moon it is 130.8 [N]

On Earth

$g_{e} = 9.81[m/s^2]\\g_{m} = 1.635[m/s^2]$

Where:

g = gravity

Weight on the moon

Wm = 80 * 1.635

Wm = 130.8[N]

Weight on the earth

We = 80 * 9.81

We = 784.8[N]

In this way we can see that the weight depends on the gravity of where the person is located.

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4 years ago