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Two canoes are tied together and traveling down a river with the current. Spotting a waterfall, the two canoeists cut the rope and push off of each other to try and reach opposite banks of the river. They are in the middle of the river and will reach the waterfall in 4 s. One canoe and its rider have a combined mass of 85 kg and reach the shore in 3.4 s. The other canoe and rider reach the opposite shore just in time at 3.9 s. What is the combined mass of this canoe and rider?
A ball whose mass is 1.3 kg is suspended from a spring whose stiffness is 3 N/m. Suppose this apparatus were taken to the Moon, where the strength of the gravitational field is only 1/6 of that on Earth. What would the period be on the Moon
according to the IOC, an Olympic diving pool must be at least 5m deep. What is the pressure at the bottom of a 5m deep pool
A 0.2 kg object is suspended from a spring with a spring constant of K = 10 N/m. What is the potential energy of the system
A m = 3 kg steel ball strikes a wall with a speed of v = 10 m/s at an angle of ?i = 60? with the surface. Determine the impulse given to the ball
a small motor draws a current of 1.75 A from a 120.0 V line. It costs $35.81 to operate the motor for 4.00 hrs at $0.0600 /kWh. What is the power output of the motor
A muon is created at the top of Mount Kamet (height 7,800 m) and travels at constant speed to sea level, what is the height of Mount Kamet
An electron in a 1-D box of length 0.100 nm, Find the energies of the four lowest states that have energies above the ground states
If a person standing inside an elevator is moving up at uniform speed of 4m/s what is the normal force on her feet? Weight of the person is 60kg
A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.00 cm wide and 10.0 m long. What is the maximum charge that can be stored in this capacitor
question1two window washers bob and joe are on a 3.00 m long 380 n scaffold supported by two cables attached to its
Does the pivot point (i.e., the triangle in the diagram upon which the ruler balances) exert a force on the ruler? Does it exert a nonzero torque about the pivot.
question1a parachutist relies on air resistance mainly on her parachute to reduce her downward velocity. she and her
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