A maximum in solar activity should next occur about
A) 2020. B) 2017. C) 2019. D) 2023. E) 2027.
D
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A crate is sliding down a 30° incline, picking up speed as it slides. Ignore air friction. (a) Which of the forces listed below that acts on the crate has the greatest magnitude?
A. 
B. 
C. Both and (which are equal)
D. 
E.
A 1-kg ball is released from a height of 6 m, and a 2-kg ball is released from a height of 3 m. Air resistance is negligible as they fall. Which of the following statements about these balls are correct? (There could be more than one correct choice)
A) As they reach the ground, the 1-kg ball will have more kinetic energy than the 2-kg ball because it was dropped from a greater height. B) As they reach the ground, the 1-kg ball will be moving faster than the 2-kg ball. C) Both balls will reach the ground with the same speed. D) Both balls will reach the ground with the same kinetic energy. E) Both balls will take the same time to reach the ground.
An AC voltage source, with a peak output of 122 V, is connected to a 54.0-? resistor. What is the rate of energy dissipated due to heat in the resistor?
a. 276 W b. 138 W c. 68.9 W d. 195 W e. 87.7 W
A 10-cm focal length converging lens is used to magnify small newspaper print 2.0 mm high. Calculate the height of the image (in mm) for the maximum magnification for a normal eye
a. 3.5 b. 7.0 c. 9.2 d. 12 e. 2.5