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A small 0.300kg bird is flying horizontally at 3.50m/stoward a 0.750kg thin bar hanging vertically from a hook at its upper end.When the bird is far from the bar, what are the magnitude and direction (clockwise or counterclockwise) of its angular momentum about a horizontal axis perpendicular to the plane of the figure and passing through point C?
Let counterclockwise angular momentum be positive, clockwise angular momentum be negative.
An astronaut constructs a pendulum with a length of 1 meter on a new planet. what is the acceleration due to gravity
A clown is using a concave makeup mirror to get ready for a show and is 26 cm in front of the mirror. The image is 70 cm behind the mirror. (a) Find the focal length of the mirror. (b) Find the magnification.
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks, Find the time it takes for the ball to fall from rest all the way to the ground
If a runner's power is 400 W as she runs, how much chemical energy does she convert in 10.0 minutes
A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take g=10ms-2
A wire of radius r and length L and resistivity ρ has a resistance R. Estimate what is the new resistance if the wire is stretched to 4 times its original length
A pendulum is constructed from a thin, rigid, and uniform rod with a small sphere attached to the end opposite the pivot. This arrangement is a good approximation to a simple pendulum (period =3.72 s), because the mass of the sphere (lead) is much gr..
Hurricane Wilma was the most powerful tropical cyclone ever recorded in the Atlantic basin, determine the estimated diameter of the system at peak strength
A baseball pitcher (m = 81 kg) is initially standing at rest on an extremely slippery, icy surface. What is the recoil velocity of the pitcher
A 3-m2 hot black surface at 80°C is losing heat to the surrounding air at 25°C by convection with a convection heat transfer coefficient of 12 W/m2.°C, Determine the total rate of heat loss from the surface
A distant galaxy emits light that has a wavelength of 683.2 nm. On earth, the wavelength of this light is measured to be 688.4 nm. (a) Decide whether this galaxy is approaching or receding from the earth.
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
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