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A 1.9 kg metal head of a geology hammer strikes a solid rock with a speed of 5.9 m/s. Assuming all the energy is retained by the hammer head, how much will its temperature increase? (chead = 0.11 kcal/kg °C).
An underwater diver sees the sun 62 degree above horizontal. How high is the sun above the horizon
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.61 km. What is the direction of the couples displacement
An electron follows a helical path in a uniform magnetic field of magnitude 0.501 T. Calculate the electron speed
A 62.0 m length of insulated copper wire is wound to form a solenoid of radius 2.1 cm. The copper wire has a radius of 0.53 mm. How long is the resulting solenoid
A 3.0 kg particle with velocity v = (5.0 m/s) i -(6.0 m/s) j is at x = 3.0 m, y = 8.0 m. It ispulled by a 7.0 N force in the negative x direction. What torque about the origin acts on the particle?
A 0.13 kg meter stick is held perpendicular to a wall by a 2.7 m string going from the wall to the far end of the stick. Find the tension in the string.
An airplane with a speed of 69.8 m/s is climbing upward at an angle of 40° with respect to the horizontal. Calculate the distance along the ground, measured from a point directly beneath the point of release
a 0.250-mm-diameter silver wire carries a 40.0ma current. what are a the electric field and b the electron drift speed
A boy is trying to retrieve his toast from a toaster using a metal knife. He touches one of the wires inside, which is connected to 120 V. What is the current through his body
A 77 kilogram person stands on a scale in an elevator. Find what does the scale read when the elevator is at rest
place a test lead in one of the big lab magnets and plug both ends in the voltmeter so that it measures voltage on the
A Carnot engine works between two heat reservoirs at temperatures Th = 305 K and Tc = 60 K. How much heat does it give off in each cycle
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