At the Fermilab accelerator in Weston, Illinois, singly-charged ions with momentum 3.2 × 10^-16 kg×m/s are held in a circular orbit of radius 1 km by an upward magnetic field. What B-field must be used to maintain the ions in this orbit? (qion = 1.6 × 10^-19 C)
a. 4 T
c. 1 T
b. 2 T
d. 3 T
B
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According to the impulse-momentum relationship Ft = change in mv, a falling bungee jumper has momentum which is reduced by the force F exerted by the bungee cord. If v is the speed of the jumper, then m in the equation is the mass of the
A) jumper. B) cord. C) ground below. D) none of the above
A child is riding a merry-go-round that has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745 rad/s2. The child is standing 4.65 m from the center of the merry-go-round
What is the magnitude of the linear acceleration of the child? A) 8.05 m/s2 B) 7.27 m/s2 C) 2.58 m/s2 D) 3.46 m/s2 E) 4.10 m/s2
In simple harmonic motion, the magnitude of the acceleration is:
A. constant B. proportional to the displacement C. inversely proportional to the displacement D. greatest when the velocity is greatest E. never greater than g
How many electrons are present in the ion of the isotope of oxygen, 18O3- if oxygen has an atomic number of 8?
A) 18 B) 5 C) 8 D) 11