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Q. A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.
How much time does it take for the package to get to the ground? [Hint: v_0 for the package equals the speed of the helicopter.]
Q. Surface of Cube At each point on the surface of cube, the electric field is in the positive direction of z. The length of each edge of the cube is 2.20 m. On the top surface of the cube, = (-33 N/C)k, and on the bottom face of the cube = (+19 N/C)k . Conclude the net charge contained within the cube.
You are driving to grocery store at 21. You are 100 from an intersection when the traffic light turns red. Presume that your reaction time is 0.75 and that your car brakes with constant acceleration. How far from the intersection are you when you ..
The bunchberry flower has the fastest-moving parts ever seen in a plant.at first , the stamen are held by the petals in a bent position, storing elastic energy like a coiled spring.
what is its kinetic energy at the end of the interval. How high a tree would a 80 kg person have to climb to increase his gravitational potential energy relative to the ground by that amount.
what is the volume of an iron atom. What is the ratio of the mass density of girder A to the mass density of girder B.
A girl rides the escalator that moves foward at a constant speed. As the girl raises, how do her gravitational energy and kinetic energy change.
There are four coils of wire being used as electromagnets. They all have the equal size and are made up of the same material but have a different number of loops.
A 1600 kg car is traveling along a straight road at 17 m/s. Two seconds later its speed is 24m/s. What is the magnitude of the net force on car during this time.
find the components of the hiker's total displacement for the trip. Find the magnitude and direction of the displacement from base camp.
An insulated Thermos contains 131 cm3 of hot coffee at 82 °C. You put a 12g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though ..
An archer pulls her bow string back 0.40m by exerting a force that increases uniformly from zero to 25 N. How much work does the archer do in pulling back the bow.
A ball is tossed from an upper story window of a building. Compute the height from which the ball is thrown.
A steel beam is suspended completely under water by a cable that is attached to one end of the beam, so it hangs perpendicularly. Another identical beam is also suspended completely under water, but by a cable that is attached to the center of the be..
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