In air a concave mirror has a focal length of 30. cm. Under water that same mirror would have ________ focal length
A) a larger
B) the same
C) a smaller
B
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If R = 3.0 k?, C = 5.0 mF, ? = 6.0 V, Q = 15 mC, and I = 4.0 mA, what is the potential difference Vb?Va?
A. ?3.0 V B. +9.0 V C. ?15 V D. +21 V E. ?6.0 V
A flat horizontal plate of area 400 cm2 is dragged over a 0.20 cm thick layer of oil at a speed of 30.0 cm/s. The oil is resting on a fixed horizontal surface. It takes a force 1.20 N applied to the plate to sustain this speed
What is the viscosity of the oil? A) 6.00 kg/m • s B) 20.0 kg/m • s C) 60.0 kg/m • s D) 0.200 kg/m • s E) 200 kg/m • s
An electron traveling due North with speed 4 × 105 m/s enters a region where the earth's magnetic field has the magnitude 5 × 10-5 T and is directed downward at 45° below horizontal. What magnitude force acts on the electron?
What will be an ideal response?
The metamorphic property of flat or elongated mineral grains in parallel layers is called
A) schist. B) cleavage. C) foliation. D) lithification.