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Some space invaders build a giant gun on the surface of their planet. After wandering the planet, they find that the planet has a radius of 8.72×107m, and after a simple freefall experiment, they calculate the mean mass density to be 5750kg/m3.
(a) What must the muzzle velocity for the projectile to escape the planet's gravitation when fired perpendicular to the horizon?
(b) What is the speed of the projectile after it has traveled a distance of 9.55×106m?
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
Find out the angle between the filter's polarizing axis and the direction of polarization of light necessary to increase the ratio of the clouds' intensity to that of blue sky so that it is three times the normal value.
An inductor (L = 400 mH), a capacitor (C = 4.43 ?F), and a resistor (R = 500 ?) are connected in series. Calculate the required peak voltage
An object is placed 23.3 cm to the left of a thin converging lens that has focal length +11.3 cm. What is the distance between the object and the image
A crane weights 10500kg and the wrecking ball is 800kg. the arm of a crane can extend to a lenght of 22m. Whats the max speed of the wrecking ball
An isolated conducting sphere has a 13 cm radius. One wire carries a current of 1.0000048 A into it while another wire carries a current of 1 A out of it. How long in seconds would it take for the sphere to enhance in potential by 820 V.
Two identical point charges (q = +6.90 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.45m. A test charge (q0 = -3.20 x 10-8 C), with a mass of 5.20 x 10-8 kg, is released from rest at one of the corners of the s..
During a stage production of Peter Pan, the 53.5 kg actress playing Peter has to fly in vertically (descend). Calculate the tension in the wire supporting the actor
An object initially at rest explodes and splits into three fragments. what is the speed of the third fragment
A soccer ball of diameter 30 cm rolls without slipping at a linear speed of 2.7 m/s. Through how various revolutions has the soccer ball turned as it moves a linear distance of 16 m.
A water slide launches a child horizontally above a swimming pool. How far from the launch point does the child land in the water
From what height did the student fall? Assume that the only force acting on him throughout the collision is that as a result of the ground.
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