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A cannon fires a cannonball from the top of a wall at a speed of 23.49 m/s and an angle of 30.95 degrees from the horizontal. A cannonball that was accidentally dropped from the top of the castle hits the water below in 2.19 s. What is the horizontal distance from the wall where the fired cannonball hits the ground?
According to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponents head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in .018s
A girl with a mass of 40 kg is swinging from a rope with a length of 3.2 m. What is the frequency of her swinging
A car races at a constant speed of 25 m/s around a circular track with a radius of 150 meters. find the displacement between the starting and ending points
A single chain supports a pulley whose weight is 40 N. Two identical 80-N weights are then connected with a cord that passes over the pulley
A 9500 line/cm grating reveals that a beam of light contains three different wavelengths. When the light strikes the grating at normal incidence, What are the wavelengths for each angle
A circuit is powered by a 12.0 V battery in series with R1=25 ohms A second set of resistors R2= 75 ohms, What is the voltage drop across the 75 ohm resistor
A 15.0-kg block of ice at 0 °C melts to liquid water at 0 °C inside a large room that has a temperature of 20.0°C. Calculate the net entropy change of the system
An automobile has a mass of 1500 kg, and its aluminum brakes have an overall mass of 6.00 kg. (a) Assume all the mechanical energy that transforms into internal energy when the car stops is deposited in the brakes and no energy is transferred out of ..
A computer disk drive is turned on starting from rest and has constant angular acceleration. What is its angular acceleration, in rad/s^2?
A mass on a string of unknown length oscillates as a pendulum with a period of 6 s. What is the period in the following situations, determine The mass is doubled
A worker in a radiation lab recieves a whole-body radiation dose of 29 mrad. Her mass is 65 kg. The radiation delivered by alpha particles for which the RBE is 12. What was the total energy absorbed by her body
Radiation at temperature Ti fills a thermally insulated cavity of volume V. If the cavity expands isentropically to volume rV, how much work is done by the radiation , as a fraction of its initial energy? How much work would be done if the expansion ..
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