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Meadow
PhysicsPhysics
Why internal energy is not sufficient to compare macro and micro states
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Wade Brandt
PhysicsPhysics
What happens to water vapor as it rises in the atmosphere?

A. Heats and condenses

B. Heats and expands

C. Cools and condenses

D. Cools and expands
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Madisyn
PhysicsPhysics
Which would likely demagnetize a magnetized iron nail?
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Nash Porter
PhysicsPhysics
To create "dry ice," manufacturers compress and cool carbon dioxide gas until it solidifies. Describe what happens to the carbon dioxide molecules as the gas is compressed and cooled.
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Guest
PhysicsPhysics
A pulse of red light and a pulse of blue light enter a glass block normal to its surface at the same time. after passing through the block, which pulse exits first?
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Octavio Vargas
PhysicsPhysics
An object is hanging by a string from the ceiling of an elevator. the elevator is moving upward with a constant speed. what is the magnitude of the tension in the string? an object is hanging by a string from the ceiling of an elevator. the elevator is moving upward with a constant speed. what is the magnitude of the tension in the string?
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Darrell Conrad
PhysicsPhysics
If a running system has a total change in the heat of 437 joules, and it is running at a temperature of 321 K, what is the entropy?
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Izayah Bates
PhysicsPhysics
A cello string 0.75 m long has a 220 hz fundamental frequency. find the wave speed along the vibrating string. answer in units of m/s.
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Rebecca Schwartz
PhysicsPhysics
A copper rod at 25°C is 1.5 m long. How long would it take a sound to move through the rod from one end to another? how would I do this?
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Malaki
PhysicsPhysics
What is the hardest mineral in this group?

A. Calcite

B. Quartz

C. Diamond

D. Gold
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Mohamed
PhysicsPhysics
In a p-type semiconductor, p signifying that the number of positive holes in the material has increased, which element could be used as the dopant?
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Lorenzo Conner
PhysicsPhysics
What are Vertical columns on the periodic table called
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Joel Maynard
PhysicsPhysics
Ecoststem with the harshest climate
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Johanna Villa
PhysicsPhysics
A firefighting crew uses a water cannon that shoots water at 25.0m/s at a fixed angle of 53.0 degrees above the horizontal. The firefighters want to direct the water at a blaze that is 10.0 m above ground level.

How far from the building should they position their cannon? There are two possibilities.
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Miracle Brock
PhysicsPhysics
A 15 kg bullet leaves the 30 cm long barrel of a gun at a speed of 240 m/s.

a. find the exit velocity of the bullet.

b. find the average force exerted on the bullet by the expanding gases as the bullet moves through the length of the 30 cm barrel
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