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Three children, each of weight 356N, make a log raft bylashing together logs of diameter 0.30m and length 1.80m. How many logs will be needed to keep them afloat in fresh water? Take thedensity of the logs to be 800 kg/m^3.
a duck and a guy named john are sitting on opposite sides of a large merry go round that is rotating clockwise. Describe the motion of the coconut viewed by the students
Treating a lightning bolt as a long, thin wire, calculate the magnitude of the magnetic field produced by such a bolt of lightning at a distance of 71 m.
A room has dimensions of 4.2 m long, 3.5 m wide, and 2.4 m high. What is the weight of the air in the room
If the bullet has a mass of 21.5 and a speed of 310 , how high would the block rise into the air after the bullet becomes embedded in it.
A charge of +1.00 10-6 C is located 29 cm from a charge of -4.00 10-6 C. What is the magnitude of the force exerted on each charge
A microscope with a tube length of 200 mm achieves a total magnification of 800x with a 40x objective and a 20x eyepiece. How far is the sample from the objective lens
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 32.9 dB. what is the intensity delivered to the eardrum
Nine grams of water are placed in a 1.99 liter pressure cooker and heated to 535oC. What is the pressure inside the container
Three forces in the x-y plane act on a 7.20 kg mass: 13.10 N directed at 503.0o, 11.80 N directed at 130.0o, and 10.40 N directed at 224.0o. Calculate the magnitude of the acceleration
q1. a roller-coaster track has six semicircular dips with different radii of curvature. the similar roller-coaster cart
A small car with mass 0.690 travels at constant speed on the inside of the track that is a vertical circle with radius 5.00. If the normal force exerted by the track on the car when it is at the top of the track (point) is 6.00, what is the normal fo..
An electric motor rotating a workshop grinding wheel at a rate of 1.01 102 rev/min is switched off. How long does it take for the grinding wheel to stop
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