An object is thrown horizontally from the open window of a building. If the initial speed of the object is 20 m/s and it hits the ground 2.0 s later, from what height was it thrown? (Neglect air resistance and assume the ground is level.)

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Answer 1

Answer: An object is thrown horizontally from the open
window of a building. If the initial speed of the
object is 20 m/s and it hits the ground 2.0 s later,
from what height was it thrown? (Neglect air
resistance and assume the ground is level.)
Initial vertical velocity = 0
formula: s = ut + (1/2)*g*t^2
s = 0 + 1/2*9.8*2^2
s = 9.8*2 = 19.6 m

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The part of your brain that controls muscle coordination and posture is the cerebellum. This portion also maintains posture, balance, and internal equilibrium. c:

Answer:

The Cerebellum controls muscle coordination and posture.

Why are solids good at transferring heat through conduction? A.The particles are close together. B.The particles do not move. C.The particles give off electromagnetic waves. D.The particles can slide past one another.

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Answer: the particles are close together

Explanation:

i think it's B. because in heat conduction particles doesn't move and the heat transfer from the high energetic power to less energetic particle

The captain told the passengers that the plane is flying at 450 miles per hour. This information describes the plane's

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Entropy measuresa.
temperature as volume increases.
b.
temperature as pressure increases.
c.
temperature at constant pressure.
d.
messiness.
e.
temperature at constant volume.

Answers

entropy measures : D. Messiness

Entropy often interpreted as the degree of disorder or randomness in the system thermal energy for conversion into mechanical work, so the best way to describe it is it measures 'messiness'

If you have a mass of 55 kg and you are standing 3 meters away from your car, which has a mass of 1233 kg, how strong is the force of gravity between you and the car ?

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Answer:

5.03×10¯⁷ N

Explanation:

From the question given above, the following data were obtained:

Mass of the person (M₁) = 55 Kg

Mass of the car (M₂) = 1234 Kg

Distance apart (r) = 3 m

Gravitational constant (G) = 6.673×10¯¹¹ Nm²/Kg²

Force (F) =?

The force between the person and his car can be obtained as follow:

F = GM₁M₂ / r²

F = 6.673×10¯¹¹ × 55 × 1234 / 3²

F = 6.673×10¯¹¹ × 67870/ 9

F = 5.03×10¯⁷ N

Thus, the force between the person and his car is 5.03×10¯⁷ N

Um I don't remember how to do this, help :(

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Pressure is a measure of force per unit area:

P = F/A

The water exerts a pressure of 202 kPa = 202,000 Pa on the diver, who has a surface area of 1.50 m². Then the force exerted by the water is F such that

F = PA

F = (202,000 Pa) (1.50 m²)

F = 303,000 N = 303 kN

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