A person's face is 30 cm in front of a concave shaving mirror. If the image is an erect image 1.5 times as large as the object, what is the mirror's focal length?
A)
20 cm
B)
30 cm
C)
50 cm
D)
70 cm
E)
90 cm
E
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Equilibrium: A uniform ladder 12 meters long rests against a vertical frictionless wall, as shown in the figure. The ladder weighs 400 N and makes an angle ? = 51° with the floor. A man weighing 874 N climbs slowly up the ladder. When he is 78 m from the bottom of the ladder, it just starts to slip. What is the coefficient of static friction between the floor and the ladder?
Fill in the blank(s) with the appropriate word(s).
A deuteron is accelerated from rest through a 10-kV potential difference and then moves perpendicularly to a uniform magnetic field with B = 1.6 T. What is the radius of the resulting circular path? (deuteron: m = 3.3 × 10?27 kg, q = 1.6 × 10?19 C)
A. 19 mm B. 13 mm C. 20 mm D. 10 mm E. 9.0 mm
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The measure of a body's resistance to being rotated is its angular momentum
Indicate whether the statement is true or false
What is h?
What will be an ideal response?