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Standing on the roof of a (48) m tall building, you throw a ball straight up with an initial speed of (20.5) m/s. If the ball misses the building on the way down, how long will it take from you threw the ball until it lands on the ground below? Give your answer in seconds and round the answer to three significant figures.
An astronaut on a strange planet finds that she can jump a maxhorizontal distance of 16.0 m if her initial speed is 2.00m/s. What is the free- fall acceleration on the planet
The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=59600 N. What is the magnitude of the lift force
a quantity is measured 100 times and after calculating the mean the standard deviation and the standard error on the
a 2.00 kg block hangs from a spring balance calibrated in newtons that is attached to the ceiling of an elevator.a what
A lumberjack (m= 98 kg) is standing at rest on one end of afloating log (m= 230 kg) that is also at rest. What is the velocity of the first log just before thelumberjack jumps off
Positronium is a hydrogen atom with the proton replaced by a positron (like electron, but w/ positive charge). Calculate E1 for positronium.
If it takes 9.19e5 J of heat to bring 0.30 kg of ice at -17*C to water vapor at 108*C, what is the specific heat of the water vapor
Factors involved in establishing a Standby Generator System? What are the major parameters involved in selection of Standby Generator System and in the design of Generator Rooms for High rise commercial projects
To demonstrate the tremendous acceleration of a top fuel drag racer, you attempt to run your car into the back of a dragster that is "burning out" at red light before the start of a race. (Burning out means spinning the tires at high speed to heat..
A single mass m1 = 4.5 kg hangs from a spring in a motionless elevator. The spring is extended x = 15.0 cm from its unstretched length. find the force the bottom spring exerts on the bottom mass
At the Indianapolis 500, you can measure the speed of carsjust by listening to the difference in pitch of the engine noisebetween approaching and receding cars. How fast is it going
A 3.0 millimeter diameter ball bearing has 3.0 × 109 excess electrons. Determine what is the ball bearing potential
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