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A helicopter is ascending vertically with a speed of 5.47m/s. At a height of 104 m above the Earth, a package is dropped from the helicopter. How much time does it take for the package to reach the ground?
A net force of 132 N acts on a baseball (m=140g) for a period of 0.045s. What is the magnitude of the change in momentum of the ball?
A heat engine operates in a Carnot cycle between 84.0°C and 345°C. It absorbs 20,800 J of energy per cycle from the hot reservoir. How much energy does it expel in each cycle by heat
You (mass 80 kg) and your friend (mass unknown) are in a rowboard (mass 60 kg) on a calm lake. What is your frriend's mass
When empty, a particular helicopter of mass 3770 kg can accelerate straight upward at a maximum acceleration of 1.34 m/s2. What is the mass of the cargo
If the Hawaiian hot spot is a fixed hot spot, which of directions is closest to the direction that the Pacific Plate was apparently moving as the Emperor Seamount Chain formed.
An object 4.0 cm high is placed 12 cm in front of a diverginglens that has a focal length of – 8.0 cm. Describe by calculation the location, nature (real or virtual andupright or inverted), and size of the image for this location.
A ball traveling with an initial momentum of 2.5 kg m/s bounces off a wall and comes back in opposite direction with a momentum of -2.5 kg m/s. What is the change in momentum of the ball
question1a small plastic sphere of mass m 137 g is attached to a string.there is an electric field of 174 nc directed
A charged particle moves in a region of uniform field along a helical path (radius = 1.0 cm, pitch = 6.0 cm) as shown. Illustrate what is the angle between the velocity of the particle and the magnetic field?
A sky diver of mass 60 kilogram can slow herself to a constant speed of 93 km/h by orienting her body horizontally, Determine the magnitude of drag force on the sky diver
In traveling to the Moon, astronauts aboard the Apllospacecraft put themselves into a slow rotation to dsitribute theSun’s energy evenly. At the start of their trip, theyaccelerated from no rotation to 1 revolution per minute during a12- min time ..
The movement of the water because of the tides will give kinetic energy to the turbine blades, causing them to spin. In the calculations that follow ignore any frictional drag because of the seawater.
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