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Suppose a 1.17×104 kg spaceship left Earth at a speed of 0.90c. What is the spaceship's kinetic energy? Compare with the total U.S. annual energy consumption (about 10^20 J).
a motor starts from rest with an angular acceleration of 12. rad/s ^2 what is the motor angular speed 4.0s later? how many revolutions does it make in this period of time
A steel ball with mass 40.0g is dropped from a height of 2.00monto a horizontal steel slab and it rebounds 1.60m, calculate the impluse delivered to the ball during impact
A certain laboratory experiment requires an aluminum wire of length of 36.0 m and a resistance of 2.80 ? at 20.0°C. What diameter wire must be used
q1. the temperature of the glass surface of a 30 w light bulb is 75degc when the room temperature is 10degc. estimate
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axel through the center of the disk. the platform has a mass of 150 kg a radius of 2m and a rotational inertia of 30 kgm about the axis of ..
The balloon contains 0.30mol of helium starts at a pressure of 110 kPa and rises to an altitude where the pressure is 70.0 kPa, By what factor does its volume increase
an automotive battery has an emf of 13.4 v. when supplying power to the starter motor the current in the battery is
a generating station is producing 1.7 x 106 w of power that is to be sent to a small town located 4.2 km away. each of
On a distant planet, golf is just as popular as it is on earth. On the distant planet, what is the maximum height of the ball
Suppose the meter stick made an angle of 20 with the horizontal (the 0 mark above and the 100 cm mark below the horizontal ) when in equilibrium. Find the perpendicular distance between the axis of rotation and the lines of action of W & the 100 gm m..
Two small balls are given positive charges. When they are a distance of 15.6 apart, the repulsive force between them has a magnitude of 0.220. What is the charge on the second sphere
What are the corresponding velocity vectors
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