3 years ago

Please help me anything will help

Physics

1 answer:

spin [16.1K]3 years ago

6 0

Your answer is C) The speed of sound is higher in solids than in liquids.

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Undefined shape, particles or atoms are loose, wet

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A 1000 kg car drives off of u 30m cliff of

Inessa05 [86]

The mechanical energy of the car is $1.54\cdot 10^6 J$

Explanation:

The mechanical energy of an object is equal to the sum of its gravitational potential energy (GPE) and its kinetic energy (KE):

E = GPE + KE

The GPE of the car is given by:

$GPE = mgh$

where

m = 1000 kg is the mass of the car

$g=9.8 m/s^2$ is the acceleration of gravity

h = 30 m is the height of the car above the ground

Substituting,

$GPE=(1000)(9.8)(30)=2.94\cdot 10^5 J$

The kinetic energy of the car is given by:

$KE=\frac{1}{2}mv^2$

where

m = 1000 kg

v = 50 m/s is the speed of the car

Substituting,

$KE=\frac{1}{2}(1000)(50)^2=1.25\cdot 10^6 J$

Therefore, the mechanical energy is

$E=GPE+KE=2.94\cdot 10^5 + 1.25\cdot 10^6 = 1.54\cdot 10^6 J$

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3 years ago

Why does air resistance alter the landin location of an object? in projectile motion

Dominik [7]

Answer:

Explanation:

In the vertical, air resistance reduces the maximum height attained and therefore also the time of the flight.

In the horizontal, air resistance reduces the range due to direct action and indirectly because the time of flight is reduced due to vertical air resistance.

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it would be a +b

Explanation:

bc it's from where the point where you started and when you ended

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<span>The atoms will form a(n) ionic bond by passing their electrons. (sodium will give an electron to chlorine, then they will bond).</span>

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