What is the shortest-wavelength X-ray photon emitted in an X-ray tube subject to 50 kV?
A)
0.025 nm
B)
0.25 nm
C)
2.5 nm
D)
25 nm
E)
none of the given answers
A
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Light that is shifted toward the color red due to the light passing very near a compact object is called ____________________
Fill in the blank(s) with correct word
Equilibrium: In the figure, a uniform ladder of weight 200 N and length 10 m leans against a perfectly smooth wall. A firefighter of weight 600 N climbs a distance x up the ladder. The coefficient of static friction between the ladder and the floor is 0.50. What is the maximum value of x for which the ladder will not slip?
A. 3.9 m B. 5.0 m C. 6.0 m D. 6.3 m E. 8.4 m
A ball thrown upwards reaches a maximum height and then comes back down to the original level. At the peak of the motion the velocity and acceleration are both zero
Indicate whether the statement is true or false
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. A horizontal force of 32 N is applied to the 3.0-kg box pushing it against the 5.0-kg box, and, as a result, both boxes slide along the floor
How large is the contact force between the two boxes? A) 12 N B) 20 N C) 24 N D) 32 N E) 0 N