Globular clusters can be used to measure the distance of nearby galaxies
a. True
b. False
Indicate whether the statement is true or false
True
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Projectile Motion: A fisherman casts his bait toward the river at an angle of 25° above the horizontal. As the line unravels, he notices that the bait and hook reach a maximum height of 2.9 m. What was the initial velocity he launched the bait with? Assume that the line exerts no appreciable drag force on the bait and hook and that air resistance is negligible.
A. 18 m/s B. 7.9 m/s C. 7.6 m/s D. 6.3 m/s
Define the Roche Limit
What will be an ideal response?
What is the magnitude of the magnetic force on a charged particle (Q = 5.0 ?C) moving with a speed of 80 km/s in the positive x direction at a point where Bx = 5.0 T, By = ?4.0 T, and Bz = 3.0 T?
a. 2.8 N b. 1.6 N c. 1.2 N d. 2.0 N e. 0.4 N
A mass, m, is hung from a spring that has a spring constant, k, and the system is set into oscillation. The period of the oscillation is measured and recorded as T. If the mass is doubled and the spring is replaced by a less-stiff one that has half the spring constant, k/2, what will happen to the subsequent period of oscillation of the new spring-mass combination?
1.It will remain the same. 2.It will quadruple. 3.It will double. 4.It will halve.