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Q. A swimmer wears a heavy belt to make her average density exactly equal to the density of water. Her mass, including the belt, is 60 kg. What is the swimmer's volume in m3? What is the simmer's weight in Newtons?
Q. An electric wire that has a mass of 5.0kg for a 20 m length is strung between two poles 20 m apart. What must be the tension in the wire if it is to take 0.80 seconds for a pulse to travel along the wire from one pole to the other?
What is the final temperature when .032kg of milk at 11C is added to .16 kg of coffee at 91C. suppose the specific heat capactieis of the two liquids are the same as water, and disregard any energy transfer to the liquid's surroundings.
The distance to the Andromeda Galaxy is estimated at about 2 ´ 106 light years. A light year is distance travelled by light in one year; if the speed of light is 3 ´ 108 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 ´ 107 s..
If you had been tasked to remove the water from New Orleans after Hurricane Katrina would you select a radial flow, mixed flow or axial flow pump for this purpose? Explain it briefly.
Find the Band Structure and Band Occupancy
In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m. The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m.
A somewhat longer cable replaces the old and is attached to the steel bar 5 m from its upper end, connecting to the same place on the wall as before and maintaining the same angle between the bar and the wall.
How to find out the magnitude of the acceleration
You're carrying a 4.0-m-long, 25 poles to a construction site when you choose to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force should you exert to keep pole motionles..
What is pressure in the cylinder
A 53 kg skier skis directly down a frictionless slope angled at 12° to horizontal. Choose the positive direction of the x axis to be downhill along the slope.
The average intensity of sunlight at the top of the earth's atmosphere is 1390 W/m2. What is the most energy that a 30 m multiplied by 55 m solar panel might collect in one hour in this sunlight.
What are magnitude and direction of the force
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