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Bentley Andrews
PhysicsPhysics
A 50-kg student gets in a 1000-kg elevator at rest. As the elevator begins to move, she has an apparent weight of 600 N for the first 3 s. How far has the elevator moved, and in which direction, at the end of 3 s?
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Russell Warner
PhysicsPhysics
A block of wood measuring 2.75 cm x 4.80 cm x 7.50 cm has a mass of 84.0 g. will the block of wood sink or float in water?
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Karissa Espinoza
PhysicsPhysics
How long does it take the baton to complete one spin?

A twirler's baton is 0.76 m long and spins around its center. The end of the baton has a centripetal acceleration of 47.8 m/s2.

a. 0.31 s

b. 0.56 s

c. 4.3 s

d. 70 s
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Allyson Browning
PhysicsPhysics
When temperature and pressure are applied to sedimentary and igneous rock?
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Marianna Gill
PhysicsPhysics
What are mixtures? click that apply
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Angeline Moyer
PhysicsPhysics
The seasons of the year result from Earth's movement, or

around the Sun.
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Jonathan Houston
PhysicsPhysics
How does a message travel across the gap at a synapse?
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Dillan Solomon
PhysicsPhysics
Two speakers are 3.0 m apart and play identical tones of frequency 170 Hz. Sam stands directly in front of one speaker at a distance of 4.0 m. Is this a loud spot or a quiet spot? Assume that the speed of sound in air is 340 m/s.
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Rene Glass
PhysicsPhysics
Height formula in physics
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Demarcus Baird
PhysicsPhysics
What do we expect to happen to Earth's air temperature if the amount of energy from the sun that reaches the Earth's surface is reduced by half?
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Cierra Rogers
PhysicsPhysics
The gravitational force between two objects increases as mass

A. decreases or distance decreases.

B. decreases or distance increases.

C. increases or distance decreases.

D. increases or distance increases.
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Superman
PhysicsPhysics
A friend asks you how much pressure is in your car tires. You know that the tire manufacturer recommends 30 psi, but it's been a while since you've checked. You can't find a tire gauge in the car, but you do find the owner's manual and a ruler. Fortunately, you've just finished taking physics, so you tell your friend, "I don't know, but I can figure it out." From the owner's manual you find that the car's mass is 1000 kg. It seems reasonable to assume that each tire supports one-fourth of the weight. With the ruler you find that the tires are 15 cm wide and the flattened segment of the tire in contact with the road is 14 cm long. What answer will you give your friend?
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Jadiel Parsons
PhysicsPhysics
What lead does to X rays?
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Jaiden Frey
PhysicsPhysics
A lab technician uses laser light with a wavelength of 650 nm to test a diffraction grating. When the grating is 40.4 cm from the screen, the first-order maxima appear 6.09 cm from the center of the pattern. How many lines per millimeter does this grating have?
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Autumn Lowe
PhysicsPhysics
One of the reasons the metric system is easier to use is that

it uses fractions

it is a decimal system

you don't need to know any math to use it

it was invented in the United States
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