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A porpoise jumps straight up and crashes back into the water at 8.9 m/s. The drag and buoyancy forces of the water slow the porpoise down with an acceleration of -9.3 m/s2 as the porpoise finally slows to a stop. Find the depth the porpoise reaches.
A rectangular block of ice 14.0 m on each side and 1.4 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3.
A high-voltage transmission line with a resistance of 0.345 ?/km carries a current of 1.45 kA. What is the power loss due to resistance in the line
The hail comes straight down at a mass rate of m/?t=0.069 kg/s and an initial velocity of v0= -15 m/s. calculate the magnitude of the force exerted by the hail on the roof
Ultrasound used in a particular medical imager has frequency 4.8 MHz and wavelength 0.31mm . Find (a) the angular frequency, (b) the wave number, and (c) the wave speed.
A group of charges is found in space. At a distance of 100 cm from the group of charges, the total electric flux through a Gaussian sphere is found to be 517 N·m2/C. What is the potential along the Gaussian sphere
Transverse waves with a speed of 56.0 m/s are to be produced on a stretched string. Calculate the wave speed in the string if the tension is 8.00 N
a boy of mass 46.2 kg is initially on a skateboard of mass 2.00 kg moving at a speed of 10.2 ms. the boy falls off the
A piston, A, as shown below, has a diameter of 0.61 cm. A second piston, B has a diameter of 3.7 cm. Determine the force, F, necessary to support 500.0 N weight in the absence of friction.
liquid water with density prho is filled on top of a thin piston in a cylinder with cross-sectional area a and total
What key compound makes photosynthesis in green plants possible? Of what importance is the atmospheric ozone layer? What causes the displays of lights called auroras?
What is the magnitude and direction of vector E?
The efficiency of a particular Carnot engine is 0.310, Find the temperature of the low-temperature reservoir
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