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Q. The radius of Earth is about 6.38 multiplied by 10^3 km. A 7.02 multiplied by 10^3 N spacecraft travels away from Earth. What is the weight of spacecraft at the following distances from Earth's surface: 6.38 times 10^3 km and 1.4 times 10^4 km?
Q. A jet plane lands with a velocity of +103m/s and can accelerate at a maximum rate of -5.02 m/s2 as it comes to rest. From instant it touches the runway, what is the minimum time needed before it can come to rest?
What is the kinetic energy of α particle while it reaches the other plate? The distance between the plates is 33 cm.
An electron librated from a hot filament cathode is attracted by an anode with a potential of 1200V positive with respect to the filament. Compute the speed of the electron when it strikes anode.
calculate the force of kinetic energy acting on Tom. calculate the distance from the edge of the table where Tom hits the floor.
For instance, the flute can be described as an open-open pipe because a flutist covers the mouthpiece of flute only partially. Meanwhile, a clarinet can be described as an open-closed pipe as the mouthpiece of the clarinet is almost completely closed..
A disk of radius R = 9 cm is pulled along a friction less surface with a force of F = 15 N by a string wrapped around the edge. At the instant when d = 28 cm of string has unwound off the disk, what is torque exerted about the center of the disk.
An underwater diver sees the sun 58 above horizontal. How high is the sun above horizon to a fisherman in a boat above the diver.
An airplane flies 200 km due west from city A to city B and then 265 km in direction of 27.5° north of west from city B to city C.
The kinetic friction force between surface and disk slows down its linear motion while at the same time making the disk spin on its axis at an accelerating rate. Finally, the disk's rotation catches up with its linear motion, and disk begins to roll ..
Two long, parallel wires, each having a mass per unit length of 40 g/m, are supported in a horizontal plane by strings 6.00cm long. When both wires carry the same current I.
Calculate the angular velocity of the wheel when the suitcase reaches the ground. compute the moment of inertia of the wheel.
suppose that all the energy goes into the arrow, with what speed does the arrow leave the bow.
A 25 kg child on a 2.0 m swing is released from rest when the swing supports make the angle of 30.0 degrees with the vertical.
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