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A 80 kilogram person standing erect steps off a 2.3 meter high diving platform and begins to fall from rest. The person comes to rest 2.0 sec after reaching the water. Find what average force did the water exert on him? N
A 5.0 kg block of aluminum isheated at atmospheric pressure so that its temperature increasesfrom 20°C to 38°C. Find the change in internal energy of the aluminum
Four particles with masses 8 kg, 4 kg, 2kg, and 2kg are connected by rigid rods of negligible mass as shown. calculate the moment of inertia of the system about the z axis
Consider a square window of side L=1.00m that lies in the plane of the blackboard at the front of the classroom. calculate the electric flux through the window
An airplane flying at a distance of 45 km from a radio transmitter receives a signal of intensity 50 µW/m2. The transmitter radiates uniformly over a hemisphere. What is the amplitude of the electric component of the signal at the airplane? What is t..
Using a 673-nm wavelength laser, you form the diffraction pattern of a 0.109-mm wide slit on a screen. How far is the screen located from the slit
An object has an equation of motion given by x = -2t^2 + 2t - 5. What is the displacement of the particle from t = 1s to t = 3s? What is the average velocity over that time range
The work performed as a function of time for a process is given by W = at3 , where a = 2.4 J/s3. What is the instantaneous power output at t = 2.6 s
the west antarctic ice sheets some 0.83 million km2 and only 6 of the total antarctic ice surface have an average
A 9.0 kilogram cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 11.0 m/s. Find the rotational kinetic energy about its center of gravity
Calculate the impulse experienced when a 66 kg person lands on firm ground after jumping from a height of 2.8m. Estimate the average force exerted on the person's feet by the ground if the landing is with bent legs
Three point charges are located near a spherical Gaussian surface of radius R = 6 cm. What is the electric flux through this surface
What is the unknown charge at x = +0.19 m in micro-coulombs? If negative, indicate so with a negative sign, but omit a sign if positive.
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