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A string is wrapped several times around the rim of a small hoop with radius 8.00 cm and mass 0.180 kg . The free end of the string is held in place and the hoop is released from rest (the figure (Figure 1) ). After the hoop has descended 95.0 cm , calculate the angular speed of the rotating hoop and the speed of its center.
To determine the specific heat of an object, a student heats it to 100 in boiling water. She then places the 68.5 object in a 196 aluminum calorimeter containing 135 of water. The aluminum and water are initially at a temperature of 19.5, and are ..
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1040 Hz, What is the speed of the bird, expressed as a percentage of the speed of sound
q1. for the beam given in the figure below assume that the material is astm-a514 steel with elastic modulus and e
Light bends when it passes obliquely from one medium to another, taking somewhat a longer path form one point to another. What does this longer path have to do with the time of travel of light
A string 1.50 m long will break if the tension in it exceeds 2X10^2N. How fast (in m/s) can a rock of mass 1.50 kg be whirled in a circular horizontal path if the string is not to break? Assume the rock moves on a smooth horizontal surface (No fri..
A doubly charged helium atom whose mass is 6.6 *10^-27 is accelerated by a voltage of 3000 V. What is its period of revolution
A wire made of aluminum is 882 m long and has a cross-sectional area of 36.6 10-7 m2. It is observed that 6.6 C pass through the wire in 79.2 s. Determine the power loss of the wire
A bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10 cm. What is the average acceleration of the bullet while it is in the sand bag
A 0.174kg softball is pitched horizontally at 26m/s. the ball moves in the opposite direction at 38m/s after it is hit by the bat.
A 1.5-V battery is connected in series with a 3.3-k? resistor, a 4.7-k? resistor, and a 1.0-k? resistor. Calculate the current (in mA) through and the voltage (in V) across each resistor
A laser beam is incident on two slits 0.100 mm apart and a screen is placed 4 m from the slits. An interference pattern appears on the screen. what is the wavelength of the laser light
A block of mass m = 300 g is released from rest and slides down a frictionless track of height h = 70.6 cm. What is the value of the spring constant k
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