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A projectile is launched vertically from the surface of the Moonwith an initial speed of 1500 m/s. At what altitude is the projectile's speedone-half its initial value?(in km)
a helicopter has 3.0 m long rotor blades rotating at an angular speed of 63 rad/s. What is tangential speed of each blade tip
a stationary particle of charge q 2.8 times 10-8 c is placed in a laser beam an electromagnetic wave whose intensity
Your toaster has a power cord with a resistance of 2.2×10?2 connected in series with a 9.9 nichrome heating element. How much power is dissipated in the heating element
Michelle is enjoying a picnic across the valley from a cliff. She is playing music on her radio (assume it to be an isotropic source) and notices an echo from the cliff. what is the intensity of the music arriving at the cliff
question a metal surface illuminated by 8.5 x 1014 hz light emits electrons whose maximum energy is 0.52ev. the same
q1. brass is an alloy made from copper and zinc. a .59 kg brass sample at 98 c is dropped into 2.8 kg of water at 5 c.
A pulley is attached to the ceiling (as shown in the figurebelow). Spring scale A is attached to the wall and a rope runshorizontally from it and over the pulley. The same rope is then attached to spring scale B
A pinball bounced around its machine before resting between two bumpers. determine the total displacement\'s magnitude and direction
Five clarinets sit a distance of 11.5 m from the audience. Together the intensity level of the music is 78.5 dB, What is the intensity of one clarinet
A 11.0-g wad of sticky clay is hurled horizontally at a 110-g wooden block initially at rest on a horizontal surface. The clay sticks to the block. obtain the speed of the clay immediately before impact
An aircraft weighing 849?N is accelerated?at 7?m/s2 for?13 seconds, at which time the aircraft launches.? How much work was done on the aircraft
An air puck of mass \(m_{1}\) is tied to a string and allowed to revolve in a circle of radius R on a frictionless horizontal table. determine the radial force acting on the puck
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