As light travels out of a gravitational field, it gains energy, and its wavelength becomes shorter
Indicate whether the statement is true or false
False
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A block is pushed across a rough horizontal surface from point A to point B by a force (magnitude P = 5.4 N) as shown in the figure. The magnitude of the force of friction acting on the block between A and B is 1.2 N and points A and B are 0.5 m apart. If the kinetic energies of the block at A and B are 4.0 J and 5.6 J, respectively, how much work is done on the block by the force P between A and B?
A. 2.7 J B. 1.0 J C. 2.2 J D. 1.6 J E. 3.2 J
Pairs of forces of equal magnitude act on identical cylinders as shown in the figures. In which example is the cylinder in translational and rotational equilibrium?
A.
B.
C.
D.
E.
Charge of uniform density 12 nC/m is distributed along the x axis from x = 2.0 m to x = 5.0 m. What is the electric potential (relative to zero at infinity) at the origin (x = 0)?
a. 91 V b. 99 V c. 82 V d. 74 V e. 140 V
A major source of chlorine gas, ci2, is from the electrolysis of brine, which is concentrated salt water, NaCI(aq). What is the sign of the electrode where the chlorine gas is formed? Is it negative or positive?
A) Positive, since the chloride ions lose electrons to form chlorine molecules. B) Negative, since the chlorine gas needs to deposit electrons to form chloride ions. C) Neither, since chlorine gas is a neutral molecule, there is not electrode attraction. D) Both, since the chloride ions from NaCl (aq) are attracted to the positive electrode to form chlorine molecules while the produced chlorine gas molecules move to deposit electrons at the negative electrode.