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A gold prospector finds a solid rock that is composed solely ofquartz and gold. The mass and volume of the rock are, respectively,14.2 kg and 3.92 × 10-3m3. The density of gold is 19 300kg/m3, and the density of quartz is 2660kg/m3. Find the mass of the gold in the rock.
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. How far apart will the two packages land on the ground
transverse waves with a speed of 59.0 ms are to be produced on a stretched string. a 4.95-m length of string with a
An airplane with a speed of 73.2 m/s is climbing upward at an angle of 40° counterclockwise from the positive x axis. Calculate the distance along the ground
Suppose a ping-pong ball and a bowling ball are rolling toward you with the same momentum, and you exert the same average force in stopping each of them.
A block of weight 43.6 N is hanging from a rope. The tension from the rope is pulling upward on the block. The block is accelerating upward at a rate of 1.22 m/s^2. What is the magnitude of the tension in the rope?
A 0.117 kg meterstick is supported at its 37.7 cm mark by a string attached to the ceil- ing. A 0.624 kg mass hangs vertically from the 4.04 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and t..
A rock climber throws a small first aid kit to another climber who is higher up the mountain. What is the vertical height between the two climbers
A copper wire has a square cross section 2.5 mm on a side. The wire is 3.2 m long and carries a current of 4.6 A. Find the magnitude of the current density in the wire
The magnetic field in an electromagnetic wave has a peak value given by B = 3.3uT. Find the peak intensity. Find average intensity
question a 75kg student is standing atop a spring in an elevator that is accelerating upward at 3.0ms2 the spring
A charge of -3.0 nC is at the origin and a second charge of 15.0 nC is at x = 7.00 m. Find the magnitude and direction of the electric field
A sodium surface, which has a work function of 2.46eV is illuminated with a wavelength = 300nm light. What is the deBroglie wavelength of these electrons
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