At the Fermilab accelerator in Weston, Illinois, singly-charged ions with momentum 3.3 × 10^?16 kg?m/s are held in a circular orbit of radius 1.00 km by an upward magnetic field. What B field must be used to maintain the ions in this orbit? (qion = 1.60 × 10^?19 C)
a. 5.3 T
b. 2.1 T
c. 2.1 T
d. 0.19 T
e. 0.48 T
c
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Samantha pushes a 60-N crate up a ramp 30 m in length and inclined at 10° with the horizontal. What potential energy change does the crate experience?
a. 1.8E+3 J b. 1.8E+3 J c. 1.2E+1 J d. 3.1E+2 J e. 1.0E+4 J
A 500-N object sits on the small piston of a hydraulic machine. The small piston has an area of 2.0 cm2. If the large piston has an area of 40 cm2, how much weight can the large piston support? Assume the pistons each have negligible weight
A) 25 N B) 500 N C) 10000 N D) 40000 N
A railroad train travels forward along a straight track at 90.0 m/s for 1 000 m and then travels at 70.0 m/s for the next 1 000 m. What is the average velocity?
a. 79.3 m/s b. 78.8 m/s c. 83.8 m/s d. 75.8 m/s e. 81.5 m/s
According to the principle of complementarity, wavelike and particle-like properties of light
A) only slightly contradict each other. B) very much contradict each other. C) make up a wholeness that better describes nature. D) none of the above