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3 years ago

The 20 or so minerals that make up most of the rocks of earth's crust are know as what

Physics

1 answer:

STALIN [3.7K]3 years ago

7 0

Rock-forming minerals because they formed the earths crust

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How is constant acceleration indicated on a motion map?

sasho [114]

<span>by vectors that are all the same length

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2 years ago

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The handles of the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers

fenix001 [56]

Answer:

Rubber or plastic covers are bad conductors of electricity. So they do not allow the electric current to pass through it.

Explanation:

Rubber and plastic are bad conductors of electricity, therefore when handling a tool with a rubber handle, the electricity will not pass through it.

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2 years ago

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In the first seconds of flight, the Saturn V rocket achieved an altitude of m, and a velocity of m/s. The rocket weighed approxi

jolli1 [7]

The average power produced by the rocket is the product of force exerted by the rocket and the velocity of the rocket.

<h3>Average power produced by the rocket</h3>

The average power produced by the rocket is calculated as follows;

P = FV

where;

P is the average power
F is the force exerted by the rocket
V is the velocity of the rocket

Thus, the average power produced by the rocket is the product of force exerted by the rocket and the velocity of the rocket.

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1 year ago

Johannes Keller’s theory was based upon analysis of planet observations taken by tycoon Brahe

Lunna [17]

I would say The answer is false

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3 years ago

A pole-vaulter just clears the bar at 5.31 m and falls back to the ground. The change in the vaulter's potential energy during t

irina [24]

Answer:

Weight = 734.46 N

Explanation:

Given:

Initial height of the pole-vaulter is, $h_i=5.31\ m$

Final height of the pole-vaulter is, $h_f=0\ m$

Change in the vaulter's potential energy is, $\Delta U=-3900\ J$

We know that, change in potential energy is given as:

$\Delta U=mg(h_f-h_i)$

Where, 'm' is the mass of the object, 'g' is acceleration due to gravity and has a value of 9.8 m/s².

Now, weight of the object is given as the product of its mass and acceleration due to gravity. So, replace 'mg' by weight 'w'. So, the equation becomes,

$\Delta U = w(h_f-h_i)$

Now, rewriting in terms of 'w', we get:

$w=\dfrac{\Delta U}{(h_f-h_i)}$

Now, plug in all the given values and solve for 'w'. This gives,

$w=\dfrac{-3900\ J}{(0-5.31)\ m}\\\\\\w=\dfrac{3900}{5.31}\ N\\\\\\w=734.46\ N$

Therefore, weight of the vaulter is 734.46 N.

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3 years ago