What would be the effect of the uneven distribution of

Physics

2 answers:

Oxana [17]3 years ago

6 0

Answer:

What would be the effect of the uneven distribution of the Sun’s energy on Earth?

The equator and the poles would both be cool.

The equator and the poles would both be warm.

<u>The equator would be warmer than the poles. </u>

The equator would be cooler than the poles.

Explanation:

Marianna [84]3 years ago

4 0

The equator would be warmer than the poles. :)

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What does the atomic number of an element represent?

Zinaida [17]

The number of protons in an atom is represented by the atomic number.

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7 0

3 years ago

A bullet fired horizontally hits the ground in 0.5 sec. If it had been fired with a much higher speed in the same direction, and

stira [4]

Answer:

3. 0.5 sec.

Explanation:

A bullet fired horizontally follows a projectile motion, which consists of two independent motions:

- A horizontal motion with constant speed

- A vertical motion with constant acceleration, g = 9.8 m/s^2, towards the ground

The time taken for the bullet to reach the ground can be calculated just by considering the vertical motion:

$y(t) = h + v_{0y} t - \frac{1}{2}gt^2$

where y is the vertical position at time t, h is the initial height, and $v_{0y}$ is the initial vertical velocity of the bullet.

Since the bullet is fired horizontally, $v_{0y}=0$ . So the equation becomes

$y(t) = h - \frac{1}{2}gt^2$

And the time that the bullet takes to reach the ground can be found by requiring y=0 and solving for t:

$t=\sqrt{\frac{2h}{g}}$

As we can see, in this equation there is no dependance on the initial speed of the bullet: therefore, if the bullet is fired still horizontally but with a different speed, it will still take the same time (0.5 s) to reach the ground.

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3 years ago

You need to push a heavy box across a rough floor, and you want to minimize the average force applied to the box during the time

7nadin3 [17]

When pushing the body it is necessary to break the frictional force generated by the floor. Once this frictional force is overcome, the body will begin to move. Ideally, if a constant velocity is maintained or close to this value, the acceleration that will be exerted will tend to be zero and therefore, by Newton's second law the value of the Force will also tend to minimum values.

Remember that this law tells us that

$F= ma$