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Everett Merritt
Physics
A positive rod is placed to the left of sphere A, and the spheres are separated.
Which best describes the spheres?
Sphere A is negative and sphere B is positive because protons from sphere A are attracted to the rod and move to sphere B.
Sphere A is negative and sphere B is positive because electrons from sphere B are attracted to the rod and move to sphere A.
Sphere A is positive and sphere B is negative because electrons from the rod move to sphere B and protons then move to sphere A.
Sphere A is positive and sphere B is negative because protons move from sphere B to the rod and also to sphere A.
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Odin Meza
Physics
A wave is turned back when it meets the boundary of the medium in which it is traveling. The wave is said to have undergone 1. reflection. 2. diffraction. 3. refraction. 4. interference.
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Guest
Physics
How is thermal energy naturally transferred between objects?
A. From the object with slower molecules to the one with faster molecules
B. From the hotter object to the cooler object
C. From the larger object to the smaller object
D. From the object with lower internal energy to the one with higher internal energy.
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Elliot Andrews
Physics
Do balance forces change the motion of an object
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Guest
Physics
100kg quarterback is travelling at 3m/s and is stopped by a tackler in 2s.
a. calculate the average force exerted by the tackler?
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Gilberto Castillo
Physics
Neritic Sediments are deposited on the ocean floor in a sorted manor. In which order are the sediments ordered moving from the shoreline to further offshore?
A. Larger to smaller
B. Smaller to Larger
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Savanna Griffin
Physics
Quartz has an index of refraction of 1.46. Diamond has in index of refraction of 2.42. In which material does a light ray entering from air slow down more?
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Maxim Miles
Physics
A net force of 100 n is moving a mass with an acceleration of 5 m/s2. what is the mass of the object? 0.05 kg 20 kg 95 kg 500 kg
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Jett
Physics
A cube of wood with a density of 0.780 g/cm 3 is 10.0 cm on each side. When the cube is placed in water, what buoyant force acts on the wood
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Alyson Blackburn
Physics
What is latitude 20 degrees north and longitude 65 degrees west?
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Rich
Physics
How many black holes are there in the Andromeda galaxy?
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Homer
Physics
Consider an electric dipole in a uniform electric field. In which orientation does the dipole-field system have the greatest potential energy? when the dipole moment and the electric field are parallel when the dipole moment and the electric field are antiparallel when the dipole moment makes the 60∘ angle with the electric field when the dipole moment and the electric field are perpendicular
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Madison
Physics
A spherical balloon is 40 ft in diameter and surrounded by air at 60°F and 29.92 in Hg abs. (a) If the balloon is filled with hydrogen at a temperature of 70°F and atmospheric pressure, what total load can it lift? (b) If it contains helium instead of hydrogen, other conditions remaining the same, what load can it lift? Answers (a) 2381 lb; (b) 2209 lb
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Trevor Blackburn
Physics
A 0.05-kg starts from rest at a height of 0.95m. assuming no friction, what is the kinetic energy of the car when it reaches the bottom of the hill? (Assume g = 9.81 m/s)
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Houston Norris
Physics
Which one of the following statements indicates the result of Kepler's astronomical calculations?
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