A hockey puck slides off the edge of a table with an initial velocity of 20.0 m/s. The height of the table above the ground is 2.00 m. How far from the edge of the table, measured along the floor, does the puck hit the floor?
A) 20.0 m
B) 40.0 m
C) 12.8 m
D) 19.6 m
E) 6.4 m
C
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In a double-slit experiment, the distance between the slits is 0.2 mm, and the distance to the screen is 150 cm. What wavelength (in nm) is needed to have the intensity at a point 1 mm from the central maximum on the screen be 80% of the maximum intensity?
A. 900 B. 700 C. 500 D. 300 E. 600
A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as shown in the figure. The mass slides down the track and collides with a 1.4-kg mass that is initially at rest on a horizontal frictionless surface. If the masses stick together, what is their speed after the collision?
a.
2.1 m/s
b.
1.7 m/s
c.
1.9 m/s
d.
1.5 m/s
e.
2.3 m/s
A positive charge is fixed at the origin. A negative charge is moved along the x-axis from x = 50 cm to x = 10 cm. The potential energy of the system
A. increases. B. does not change. C. decreases.
In the context of the excitation of atoms, jumps of electrons from one orbit to another are sometimes called__________
A) magnetic jumps B) transitional jumps C) filtered jumps D) quantum jumps