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A ball of mass 0.640 kg moving east (+x direction) with a speed of 3.20 m/s collides head-on with a 0.480 kg ball at rest. If the collision is completely elastic, what will be the speed and direction of each ball after the collision?
Percy did 1000 joules of work and exerted a power of 2 watts. How many seconds did Percy take to do his work
A Carnot engine takes in heat from a reservoir at 470°C and releases heat to the lower-temperature reservoir at 200°C. What is its efficiency.
What is the work done by the electric field on a charge q as it moves through a potential difference of ?V? (Use any variable or symbol stated above as necessary.)
A surveyor measures the distance across a straight river by the following method: Starting directly across from a tree on the opposite bank, he walks x = 102 m along the riverbank to establish a baseline. How wide is the river
A 43-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, How high does she rise during this interval
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
in a headon collision (without friction) a 4000 kg truck going 10m/s due east strikes a 2000kg car gong 40m/s west, what direction do they roll in
When light of wavelength 300 nm falls on a cobalt surface, electrons are emitted that have a maximum kinetic energy of 0.240eV. Compute The cut off wavelength, The work function of cobalt,
A horizontal beam of vertically polarized light of intensity 43 W/m2 is sent through two polarizing sheets. What is the intensity of the light transmitted by the pair of sheets
A proton with mass 1.67×10−27 kg and charge 1.60×10−19 C accelerates from rest in a uniform electric field of strength 500 N/C. (a) What is the magnitude of the acceleration of the proton? (b) How long does it take the proton to reach a speed of 35,0..
a rock is dropped into an abandon mine and a splash is heard 10 s later. how fast the rock was falling when it hit the water
A constant force is applied to an object, causing the object to accelerate at 10 m/s2. What will the acceleration be if the force is halved? What will the acceleration be if the object's mass is halved?
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