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A car of mass 1420 kilogram traveling at 20 m/s is at the foot of a hill that rises 120 meter in 2 kilometer. At the top of the hill, the speed of the car is 10 m/s. Compute the average power delivered by the car engine, ignore any frictional losses.
Far in space, where gravity is negligible, a 480-kg rocket travelling at 95 m/s fires its engines. The figure shows the thrust force as a function of time. The mass lost by the rocket all through these 30s is negligible.
You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. What should be the diameter of the pipe under the platform
A certain lightbulb is rated at 60.0 W when operating at an rmsvoltage of 1.20 x 102 V. (a) What is the peak voltage applied across the bulb? (b) What is the resistance of the bulb?(c) Does a 1.00 x 102 W bulb have greater or lessresistance than a 60..
A glass windowpane in a home is 0.62cm thick and has dimensions of 0.9m multiplied by 1.6 m. On a certain day, the indoor temperature is 20 °C and the outdoor temperature is 0 °C.
A constant horizontal force Fa pushes a 3.70 kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. it gives the package's x and y velocity components versus time t. (The vx axis is marked in increments of 1.2..
Two linear waves have the same amplitude and speed, and otherwise are identical except one has half the wavelength of the other, Which transmits more energy
A beam of protons at an accelerator creates a current of 120 mu/A. If the beam is focused on a target, how many protons strike the target in 30.0 s
question1a puck of mass m1 76.0 g and radius r1 4.40 cm glides across an air table at a speed of 1.50 ms. it makes a
A vessel whose walls are thermally insulated contains 2.3 kg of water and 0.35 of ice, all at the temperature of 0.0 . The outlet of a tube leading from a boiler in that water is boiling at atmospheric pressure is inserted into the water. How many..
How much water must be displaced to float a cubical block of wood (density 655 kg/m^3) that is 15.0 cm on a side
An egg rolls off a kitchen counter and breaks as it hits the floor. How large is the impulse that the floor exers on the egg, and how large is the force exerted on the egg by the floor when stopping it? The counter is 1.0mhigh, the mass of the egg is..
The alveoli in the lungs have an average radius of 0.125 mm and areapproximately spherical. If body temperature is 37.0 degrees C, and the pressure in the lungs is atmospheric pressure:
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