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Dmitry_Shevchenko [17]

4 years ago

9

What happens when infrared hits a shiny surface

1 answer:

saw5 [17]4 years ago

3 0

Will reflect ........

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Mkey [24]

Answer:

A)

Explanation:

The lowest latitudes get the most energy from the sun. The highest latitudes get the least.

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3 years ago

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a moving freight car collides with an identical one that is at rest what happen to the second car after the collison

irakobra [83]

It moves backwards do to the impact. this is because force can not be created nor destroyed so it is transferred.<span />

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3 years ago

Which term is used to describe all the habitats around the world

mr Goodwill [35]

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3 years ago

The metric system is based on units of

Margaret [11]

The metric system is based on units of tens.

7 0

4 years ago

A body of mass 2.78 kg is pushed straight upward by a 31.3 N vertical force. What is its acceleration (in m/s2)

Bingel [31]

To solve this problem we will apply the concepts related to Newton's second law for which the product of mass and acceleration is defined as the force applied to an object. Mathematically this is,

$F_{net} = ma \rightarrow a = \frac{F_{net}}{m}$

Here,

$F_{net} =$ Net external Force

m = Mass of the body

a = Acceleration

The net force on the body would be given by the difference between the ascending force and the weight, therefore,

$F_{net} = F-W$

Here,

F = Upward Force

W = Weight

The Weight is,

$W = (2.78kg)(9.81m/s^2)$

$W = 27.27N$

Then the $F_{net}$ is

$F_{net} = 31.3-27.27$

$F_{net} = 4.03N$

Finally replacing at the first equation we have,

$a = \frac{4.03N}{2.78kg}$

$a = 1.44m/s^2$

Therefore the acceleration of the stone is $1.44m/s^2$

8 0

4 years ago