Question 4 Multiple Choice Worth 4 points)

Physics

1 answer:

guapka [62]3 years ago

7 0

Answer:

its A Weathering breaks down rocks; deposition leaves them in new places

Explanation:

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SONAR stands for "sound navigation and ranging,” and it is used to map and explore the ocean floor.

lara31 [8.8K]

SONAR stands for "sound navigation and ranging,” and it is used to map and explore the ocean floor.

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3 years ago

A satellite revolves around a planet at an altitude equal to the radius of the planet. the force of gravitational interaction be

padilas [110]

Let
M = the mass of the planet
n = the mass of the satellite.
r = the radius of the planet

When the satellite is at a distance r from the surface of the planet, the distance between the centers of the two masses is 2r.
The gravitational force between them is
$f_{0} = \frac{GMm}{(2r)^{2}} = \frac{1}{4} ( \frac{GMm}{r^{2}} )$
where
G = the gravitational constant.

When the satellite is on the surface of the planet, the distance between the two masses is r.
The gravitational force between them is
$f_{4} = \frac{GMm}{r^{2}} =4f_{0}$

Answer: $f_{4} = 4f_{0}$

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4 years ago

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The exit nozzle in a jet engine receives air at 1200 K, 150 kPa with negligible kinetic energy. The exit pressure is 80 kPa, and

nikitadnepr [17]

Complete question:

The exit nozzle in a jet engine receives air at 1200 K, 150 kPa with negligible kinetic energy. The exit pressure is 80 kPa, and the process is reversible and adiabatic. Use constant specific heat at 300 K to find the exit velocity.

Answer:

The exit velocity is 629.41 m/s

Explanation:

Given;

initial temperature, T₁ = 1200K

initial pressure, P₁ = 150 kPa

final pressure, P₂ = 80 kPa

specific heat at 300 K, Cp = 1004 J/kgK

k = 1.4

Calculate final temperature;

$T_2 = T_1(\frac{P_2}{P_1})^{\frac{k-1 }{k}$