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A 25.0kg child plays on a swing having support ropes that are 1.80m long. A friend pulls her back until the ropes are 45.0 (degrees) from the vertical and releases her from rest.
Part A How fast will she be moving at the bottom of the swing?
How many helium-filled balloons would it take to lift a person, Assume the person has a mass of 80kg and that each helium-filled balloon is spherical with a diameter of 33 cm
Two strings are adjusted to vibrate at exactly 188 Hz. Then the tension in one string is increased slightly. What is the new frequency of the string
A student removes a 10.50 kg stereo from a shelf that is 1.802 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the work done by a) person and b) gravitational force that acts on the amplifier.
One component of a magnetic field has a magnitude of 0.0406 T and points along the +x axis, Determine the angle that the net force makes with regard to the +x axis
Derive the speed of the wave water in a shallow pool of water of depth y. You may consider using a method similar to the derivation of the sound wave equation
The intensity of the electromagnetic radiation from the Sun when it reaches the Venus' surface is approximately 2600 W/m2. What is the amplitude of the associated magnetic field
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.35 Earth years in its circular orbit around its sun, Find the radius of the exoplanet\'s orbit
The fastest pitched baseball was measured at 46 m/s, what force did he produce on the ball during this record-setting pitch
An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is 281 nm, How much net energy (in terms of eV) is absorbed by the atom
At the Equator near Earth's surface, the magnetic ?eld is approximately 64.5 µT northward and the electric ?eld is about 51 N/C downward in fair weather. Find the magnitude of the gravitational force on the electron
A wristwatch has +2 nC of charge deposited at each numeral (representing each hour). The radius of the wristwatch is 3.00 cm. How much work is required to move a proton
The small spherical planet called "Glob" has a mass of 7.28 x 10^18 kg and a radius of 6.26 x 10^4 m. What was the initial speed of the rock
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