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Electric cars need charging. Discuss, from a thermodynamics and physics point of view, the efficiency of electric cars where electricity is not generated from renewable sources.
At least one hundred words.
Describe the difference (in both what happens and why) between a person who jumps from an airplane with a parachute and one who jumps without a parachute. If a parachute is used, what would be the difference when the same size parachute is used on..
Two objects attract each other gravitationally with a force of 3.1×10?10N when they are 0.45m apart. One of the object has a mass of 2.0kg. Find the mass of the other object
a cannon sends a projectile towards a target a distance1420m away. The initial velocity makes an angle 21 degrees with thehorizontal. the target is hit. How high is the highest point of trajectory
A proton (charge +e) moves a distance d = 0.50 m in a straight line between points a and b in a linear accelerator. Determine the potential difference
Ignore air resistance and the curvature of the earth in this problem. How far in meters does the projectile travel horizontally?
A planet of mass 7.00 1025 kg is in a circular orbit of radius 6.00 1011 m around a star. What is the change in kinetic energy of the planet
A diving board oscillates with simple harmonic motion of frequency 3.23 cycles per second. What is the maximum amplitude with which the end of the board could vibrate in order that a pebble placed there not lose contact with the board during the o..
You want to close an open door by throwing either a 400 g lump of clay or a 400 g rubber ball toward it. You can throw either object with the same speed, but they are different in that the rubber ball bounces off the door while the clay just stick..
A proton is confined within an atomic nucleus of diameter 4.1 fm. Estimate the smallest range of speeds
A plastic rod is rubbed with a cloth, and in the process it acquires a charge of ?2.1×10E?8C. How much does the mass of the rod increase by
A train engine weighs 5 times as much as aflatbed car. If the engine coasts at 3 km/hr into the boxcarthat is initially at rest and becomes coupled to the boxcar, how fast do the two move after the inelastic collision?
A focused magnetic field of variable strength is used to "steer" electrons in a television tube (CRT). The electrons emerge in a stream from a "gun" that has accelerated them across a potential difference. A magnetic field can deflect the beam of ..
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