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A power plant produces 30 MW for 20 minutes, 60 MW for 15 minutes and 30 MW for 25 minutes. How much electric energy, in MWh, does the plant produce?
Why is it tiring to push hard against a solid wall? When a person pushes hard on a solid wall, is work done?
A cannon tilted upward at = 31 fires a cannonball with a speed of 94 . At that instant, what is the component of the cannonball's velocity
Decide the specific internal energy of 98 L of neon gas at 400°C and 2 MPa. The neon gas has a total enthalpy of 1200 kJ . Suppose that the neon gas is an ideal gas.
A lighthouse sweeps its beam of light around in a circle once every 7.5 s. To an observer in a spaceship moving away from Earth, the beam of light completes one full circle every 15 s. What is the speed of the spacecraft relative to Earth?
Does the car have enough initial velocity to make it around the loop? If it does not, where does it stop and turn around?
What is the speed v of a wave traveling down such a wire if the wire is stretched to its breaking point? Express the speed of the wave numerically, in meters per second, to the nearest integer.
A 0.100 kg block is suspended from a spring. When a small pebble of mass 40 g is placed on the block, the spring stretches an additional3.8 cm. By the pebble on the block, the block oscillates with amplitude of 15.0cm. (Suppose that the pebble is glu..
Compare this with the average particle energy of 1019 GeV needed for unification of forces.
The magnetic flux through a loop of wire is ?B = 5.7 T · m2. what is the smallest possible value for the area of the loop
Determine the resistance of a 75-W lightbulb connected to its proper source voltage of 110 V. Express your answer to two significant figures and include the appropriate units.
The displacement of a wave traveling in the positive x-direction is D(x,t)=(3.5cm)sin(2.7x?122t), where xis in m and t is in s. What is the frequency of this wave
an automobile battery has an emf of 12.60 v and an internal resistance of 0.076 0?. the headlights together have an
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