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A projectile is fired straight upward from Earth's surface with a speed that is 0.816 times the escape speed. If RE is the radius of Earth, what is the highest altitude reached measured from the surface of the Earth?
A woman pulls a loaded sled of mass m = 75 kg along a horizontal surface at constant velocity
A 2680 satellite used in a cellular telephone network is in a circular orbit at a height of 800 above the surface of the earth. What fraction is this force of the satellite's weight at the surface of the earth
A rock is suspended from a scale reads 20.0 N. A beaker of water ( having a density of 1000 kg/m^3) is raised up so the rock is totally submerged in the water. The scale now reads 12.5 N. What is the density of the rock?
A 350kg piano slides 3.7m down a 33^\circ incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure(Figure 1) ). The effective coefficient of kinetic friction is 0.32.
A block of mass 1.90 kg is pushed 4.60 m along a frictionless horizontal table by a constant 16.0 N force directed 27.0° below the horizontal.
You stand in the earth's magnetic field, directly facing its horizontal component (in other words, facing magnetic south). Compute the outward flux through your body's back surface
Runner A is initially 1.0 mi west of a flagpole and is running with a constant velocity of 8.0 mi/h due east. How far are the runners from the flagpole when they meet
A long thin rod lies along the x-axis. One end is at x=2.00 m and the other at x=4.00 m. Calculate mass of the rod
A ball is thrown upward from a platform 4.0 m high with a speed of 23 m/s at an angle of 37 o from the horizontal. What is the magnitude of its velocity when it hits the ground?
A 250MW laser pulse is focused with a lens to a diameter of 2.5?m. What is the laser beam's electric field amplitude at the focal point
Find the minimum frequency a photon must have if it is to ionize the n = 1 state of a doubly ionized lithium atom
two small charges with a mass of 1 gram each are connected by 2 cm long insulating rod of negligible mass. Obtain the moment of inertia around the center of mass
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