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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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
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 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?
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