Question

1. When is the speed largest within a pendulum swing.

A.As it passes by the equilibrium point (the lowest point) in either direction.

B.At the highest point of the swing.

C.Midway from the highest to the lowest point, going down.  

D.Midway from the lowest point to the highest point, going up.

E.Midway from the lowest point to the highest point, in either direction.

F.The speed is uniform throughout a swing.

2.For small amplitude oscillations, when friction is not important, what determines the period of the pendulum?

A.The mass of the object and the length of the string.

B. The mass of the object, the length of the string and the surface area of the object.

C.The length of the string and the surface area of the object.

D. The length of the string only.   

E.The mass and density of the object.

F. The mass of the object.

3. In the simulation, what type of radiation arrives from the sun and what is its behavior?

A.Both infrared and visible light photons are observed arriving. The photons randomly change direction in air.  

B.The incoming radiation is infrared. The infrared photons randomly change direction in air.

C.The incoming radiation is visible. The visible photons randomly change direction in the air.

D. The incoming radiation is visible. The visible photons reach the surface of the Earth.

E. The incoming radiation is infrared. The infrared photons reach the surface of the Earth.

4.In the simulation, which molecules show the strongest interaction with visible light photons.

A.None of them show a strong interaction with visible light photons.

B.CO2 only.

C.CH4 only.

D.O2 and N2.

E.H2O and CO2.

F.H2O and CH4.

Answer 1

1.A as it passea by the equilibrium point

Kinetic energy is maximum at that point so the speed is also the largest

2.D length of the string only

Since the amplitude is small and friction negligible dimensions of the mass does not influence time period and mass never does so only length of the string influence

3.C The incoming radiation is visible. The visible photons randomly change direction in the air

4.A None of them show a strong interaction with visible light photons