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Abby Murray
Physics
A rocket with a total mass of 330,000 kg when fully loaded burns all 280,000 kg of fuel in 250 s. The engines generate 4.1 MN of thrust. What is this rocket's speed at the instant all the fuel has been burned if it is launched in deep space?
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Alex Bradley
Physics
Un móvil parte del reposo y, al cabo de 5 s, alcanza una velocidad de 5 m/s; a
continuación, se mantiene con esa velocidad durante 4 s, y en ese momento frena
uniformemente y se detiene en 3 s.
a) Representa la gráfica v-t correspondiente a dicho movimiento.
b) Calcula la aceleración que lleva el móvil en cada tramo.
c) Calcula el espacio total recorrido a lo largo de todo el movimiento.
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Ashton Johnson
Physics
A 2.0-kilogram mass is located 3.0 meters above
the surface of Earth. What is the magnitude of
Earth's gravitational field strength at this
location?
(1) 4.9 N/kg (3) 9.8 N/kg
(2) 2.0 N/kg (4) 20. N/kg
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Liana Roman
Physics
How long did the astronauts stay on the moon?
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Hayden Kemp
Physics
Brenda is standing on the beach; the sea is choppy. she observes that the crests of distant waves appear not only smaller, but also closer together than do the crests of waves nearer the beach. this example illustrates a depth cue known as:
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Compton
Physics
If two waves in the same space interfere completely destructively, which of the following occurs?
A. The amplitude decreases.
B. The amplitude increases.
C. The wave speed increases.
D. The wave speed decreases.
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Judah Mcintyre
Physics
An electric force exists between which pair of objects? Check all that apply.
A) a neutral object and a negative object
two negative objects
B) a neutral object and a positive object
C) two positive objects
D) a negative object and a positive object
E) two neutral objects
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Adyson
Physics
A person jogs 40 km in 32 minutes then 20 km in 22 minutes and finally 10 km in 16 minutes
what is his average speed in in per minute
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Brisa Vaughn
Physics
Write a sentence describing the relationship between volume and time
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Jordyn Chandler
Physics
For two different inertial frames of reference would acceleration and change in velocity be different? How would energy be affected?
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Jaylah Chaney
Physics
You're still in a redecorating mood and want to move a 35kg bookcase to a different place in the living room. You exert 58 N on it which makes it move at 0.12 m/s^2. Find the coefficient of kinetic friction between the bookcase and the carpet
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Jacob Hayden
Physics
You are standing in an elevator that is accelerating upward at 2 m/s2. What is the normal force acting on you by the elevator if your mass is 70 kg?
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Joslyn Miles
Physics
A father racing his son has 1/3 the kinetic energy of the son, who has 1/2 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son
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Mikey
Physics
A 2 kg book is pushed across a table is a force 4. Assuming no friction, what is the acceleration of the book?
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Colten Shields
Physics
When electricians use wiring for houses they use both copper and rubber. Which do you think is used as a conductor?
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