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A hammer of mass 200g is dropped from the top of a roof of the two storey building to the ground. Another hammer of equal mass fell from a coffee table to the ground. Given than the height of the two storey building and the coffee table are 10 m and 5 m respectively.
a. Show that a hummer dropped from two storey building roof does more work than a hammer falling from a coffee table.
b. Calculate the potential energy from the two heights.
A 0.410 kg pendulum bob passes through the lowest part of its path at a speed of 3.13 m/s. What is the tension in the pendulum cable at this point if the pendulum is 76.2 cm long.
Calculate the minimum excitation energies of (a) the 33 kHz quartz crystal of a watch, (b) the bond between two O atoms in O2, for which k= 1177 N m-1.
A 3.4-cm-diameter parallel-plate capacitor has a 1.8mm spacing. The electric field strength inside the capacitor is 1.3×105V/m, What is the potential difference across the capacitor
A rod of length l and uniform mass m is hinged at its lower end while it was held at rest in a vertical position. What is the angular acceleration of the rod during the fall for a given theta
a 10 kg sled slides down a snowy hill. At position A it is moving at 1.00 m/s when it reaches position B it is moving at 3 m/s. What is the work done by friction on the sled
A long straight wire carries 2.7A along the +x-axis. Discover the magnitude of the magnetic field at a point 20cm away on the +y-axis. Find the direction of the magnetic field at a point 20cm away on the +y-axis.
Two point charges are placed along a horizontal axis with the following values and positions: +3.0μC at x=0 cm and-7.0μC at x= 20 cm. At what point along the axis is the electric field zero?
An object floating in a lake has 15 percent of its volume above the lake surface. What is the density of the object
A pair of narrow, parallel slits separated with 0.270 mm is illuminated by the green component from a mercury vapor lamp (λ = 546.1 nm). The interference pattern is observed on a screen 1.23 m from the plane of the parallel slits.
question a simple harmonic oscillator takes 3.0 seconds to undergo 30 complete vibrations. find the frequency in hz
Explain the sign of the acceleration and describe in words how the thread changes the velocity of the spider. would also like to know how to get to the answer can any one explain this to me in english?
A spherical pot of hot coffee contains 0.75 of liquid (essentially water) at an initial temperature of 99. Calculate the coffee's rate of heat loss by radiation
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