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The science fiction writer Robert Heinlein once said, "If you can get into orbit, then you're halfway to anywhere." Justify this statement by comparing the minimum energy needed to place satellite into low Earth orbit (h=400km) to that needed to set it totally free from the bonds of Earth's gravity. Neglect any effects due to air resistance.
A proton moving with a velocity of 4.0 *10^4 m/s enters a magnetic field of 0.20 T. what is the magnitude of the force on the proton
A ball thrown straight up from the ground passes a window 5.6 m up. An observer looking out the window sees the ball pass the window again, going down, 2.6s later
In which case is it more likely that we may neglect non-ohmic effects due to the heating of the circuit by the current: in a series or parallel circuit? Why?
Suppose a small boat is at the crest of this wave, 1.5 {rm m} above the equilibrium position. Illustrate what will the vertical position of the boat be 5 seconds later?
You inflate the front tires on your car to 29 psi. Later, you measure your blood pressure, obtaining a reading of 138/84, the readings being in mm Hg. In metric countries (which is to say, most of the world), these pressures are customarily reported ..
Two springs with spring constants k1 and k2are put together end-to-end. Let x1 be the amount by which thefirst spring is stretched relative to its equilibrium length, andsimilarly for x2.
It's generally okay to ignore relativistic effects when a particle's speed is less than 1.0% of the speed of light, Find the accelerating potential difference that will bring electrons to that speed, starting from rest
A coil of area 0.100 m2 is rotating at 70.0 rev/s with the axis of rotation perpendicular to a 0.200 T magnetic field. If the coil has 700 turns, what is the maximum emf generated in it
a square loop of dimensions 2a x 2a lies in the xy plane with its center at the origin and sides parallel to the x and
1 at one instant a proton is moving in the positive x direction in a uniform magnetic field which is in the positive y
A pinball bounced around its machine before resting between two bumpers. determine the total displacement\'s magnitude and direction
An electric clothes dry operates on a voltage of 220V and draws a current of 20A. How long does the dryer take to dry a full load of clothes that weighs 6.0 kg wet and 3.7kg dry
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