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A 5.20 x 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 x 104 J of work on the balloon in the process. At what height above the surface of the earth does the balloon have a speed of 7.40 m/s?
A converging lens is located 10.0 cm to the left of a diverging lens. The focal length of the converging lens is +20.0 cm. where is the final image formed by the diverging lens
Light is emited from an ordinary lightbulb filament in wave-train bursts about 10^-8s in duration. What is the length in space of such wave trains
A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. What is the mass of the aluminum chunk
Neutron-induced fissionof U-235 results in the fission products iodine-139 and yttrium-95. How many neutons are released
A projectile is fired horizontally from a gun that is 47.0 m above flat ground; emerging from the gun with a speed of 250 m/s.
A 2260 kg satellite used in a cellular telephone network is in a circular orbit at a height of 710 km above the surface of the earth. What is the gravitational force on the satellite
a a sidewalk is to be constructed around a swimming pool that measures 10.0 plusmn 0.1 m by 17.0 plusmn 0.1 m. if the
a bathyshpere dives to a depth of 1000 m in the ocean. if the inside is maintained at one atmosphere, what is the net force acting on the round window
A place kicker must kick the football from a point 30.2 m from the goal and clear a bar 3.00 m above the ground. what is the vertical component of the ball's velocity
A heat pump has a coefficient of performance of 3.90, How much energy does it deliver into a home during 12 h of continuous operation
the international space station orbits the earth at an average altitude of 362 km. assume that its orbit is circular
The only force acting on a 2.7 kg canister that is moving in an xy plane has a magnitude of 2.7 N. The canister initially has a velocity of 3.0 m/s in the positive x direction, and some time later has a velocity of 7.4 m/s in the positive y direct..
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