Peak values for a neodymium-glass laser are 1200 J for 1 nanosecond. If the cross section of the laser beam is 1 cm2, what are the maximum values of E and B? (µ0 = 4p × 10^-7 T×m/A, c = 3.00 × 10^8 m/s)
a. 3 × 10^7 V/m, 2 T
c. 1 × 10^10 V/m, 3 T
b. 2 × 10^8 V/m, 10 T
d. 3 × 10^9 V/m, 10 T
D
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If there were no gravity, a ball thrown upward at an angle would follow a straight-line path. Due to gravity, however, at the end of 2 s it is
A) 5 m below the straight line. B) 10 m below the straight line. C) 15 m below the straight line. D) 20 m below the straight line. E) more than 20 m below the straight line.
A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2 . At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves?
a. 1.9 km b. 1.3 km c. 1.6 km d. 1.0 km e. 2.1 km
Briefly describe what you would see if your friend plunged into a black hole
What will be an ideal response?
The force of friction between two surfaces is independent of the area of contact between the surfaces
Indicate whether the statement is true or false