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Q. Assume that, as lying on a beach near the equator watching the Sun set over a calm ocean, you start a stopwatch just as the top of the Sun disappears. You after that stand, elevating your eyes by a height H = 1.90 m, and stop the watch when the top of Sun again disappears. If the elapsed time is t = 11.8 s, what is the radius r of Earth?
A man drags a 72.0 kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 26 degrees above the horizontal, and the strap is inclined 68 degrees above the horizontal. The center ..
Presume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate.
A 45kg pole-vaulter running at 12 m/s vaults over the bar. Her speed when she is above the bar is 1.90m/s. Avoid air resistance and determine her height as she crosses the bar.
What is the total charge on Earth's surface implied. explain the strength and direction of an electric field.
A solenoid of radius 1.1 cm produces a magnetic field at its center is 0.28 T. What is the magnetic flux by the center of the solenoid.
A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily.
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, plates are disconnected from the battery. define the behavior of the ball.
If the parachutist comes to rest with constant acceleration over a distance of 0.610 m, what force does the ground exerts on her.
A U tube is filled with water, and the two arms are capped. The tube is cylindrical, and the right arm has twice the radius of the left arm. The caps have negligible mass, are watertight, and can freely slide up and down tube.
An object that hangs form the ceiling of a staionary elevator by an ideal spring scilliates with a period T. If the elevator accelerates upward 2g , what will the period of oscillation of the object ?
One hundred k mol of a gas containing 94.4 mole% methane, 3.40% ethane, 0.60% propane, and 0.50 percent butane is to be burned with 17% excess air. Calculate the required molar flow rate of the air.
A pencil (mass 5.8g and length 8.3cm) is at first balanced so that it is sitting vertically on a flat table. If the pencil then falls, find its angular velocity just before it strikes the tabletop. Assume that the mass of the pencil is distributed un..
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