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Makai Wilkins
Physics
The initial speed of the bullet is 822 m/s, and the speed of the bullet after it exits the block is 439 m/s. At what speed does the block move after the bullet passes through it?
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Davin Andrade
Physics
A horse is running at 12m/s accelerated to 38m/s in 10 seconds. What is the horses acceleration.
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Todd Parks
Physics
You have a tungsten sphere (emissivity ε = 0.35) of radius 25 cm at a temperature of 25°C. If the sphere is enclosed in a room whose walls are kept at - 5°C, what is the net flow rate of energy out of the sphere?
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Sonia Bartlett
Physics
True or false materials with a high specific heat can absorb a lot of energy and show little change in temperature
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Tanya Knox
Physics
The principle of blank states that objects behave in the same manner in a gravitational field and in an accelerated frame of reference.
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Jayla Price
Physics
A powerboat, starting from rest maintains a constant acceleration. After a certain time Δt, its displacement and velocity are Δr and Δv. At time 2Δt, what will be its displacement and velocity, assuming the acceleration remains constant?
(A) 2Δr and 2Δv
(B) 2Δr and 4Δv
(C) 4Δr and 2Δv
(D) 4Δr and 4Δv
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Jeffery Gillespie
Physics
Study the scenario.
A toy is launched horizontally by a spring. Once the toy is moving there is a total of 150 J of energy stored in the isolated system.
How much energy was stored in the system before the spring released the toy?
(A) less than 150 J because an isolated system loses energy as energy is converted from one form to another
(B) more than 150 J because an isolated system gains energy as energy is converted from one form to another
(C) 150 J, because the initial and final energy must be the same in an isolated system
(D) there is no way to tell what happens to the amount of energy in an isolated system unless we know the speed of the toy
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Wendy Knapp
Physics
A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car. Since a lot of damage is done on the car : Select one:
a. the force on the truck is smaller than the force on the car.
b. the truck did not slow down during the collision.
c. the force on the truck is greater then the force on the car.
d. the force on the truck is equal to the force on the car.
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Princess Hernandez
Physics
All waves transfer what?
a. energy
b. matter
c. energy and matter
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Royce Sharp
Physics
Identify the frequency used by these broadcast media.
FM
AM
Television
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Juliette Brennan
Physics
The purpose of teaching high levels of math is to filter out students who lack logical intelligence
True or False
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Carley Randolph
Physics
What two factors determine the directions of the global winds?
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Camryn Farmer
Physics
In deciding whether to use a technology, people must analyze
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Parker Peck
Physics
What does the term "energy crisis" mean?
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Buds
Physics
Calculate the magnitude and direction of the electric field 2.0 m from a long wire that is charged uniformly at λ = 4.0 * 10-6 C/m.
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