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Compared to a car moving at 10 km/h, how much more kinetic energy does that same car have when it's moving at 20 km/h?
A steel tank is built to hold methanol. The tank is 2.000 m in diameter and 5.000 m high. It is completely full with methanol at 10.0°C. If the temperature rises to 40.0°C, how much methanol (in liters) will flow out of the tank, given that both the ..
A 20 {rm kg} child plays on a swing having support ropes that are 2.3 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest.
A stone dropped into a pond generates a travelling wave group approximately 1 m long; the waves within the group have a wavelength of about .1 m Estimate the range of the wavevector spectrum representing the group.
You wish to launch a satellite that will remain above the same spot on earth's surface. calculate the radius of the circular orbit this satellite must have
after struggling to remove a refrigerator mass 100 kg. you finally apply enough force to get it moving. what is the
Two positive ions and one negative ion are fixed at the vertices of an equilateral triangle. Where can a fourth ion be placed, along the symmetry axis of the setup, so that the force on it will be zero? Is there more than one such place? You will ..
A hollow, conducting sphere with an outer radius of 0.240 m and an inner radius of 0.197m has a uniform surface charge density of +6.35×106 C/m2. Calculate the strength of the electric field just outside the sphere
a spring is hanging vertically from a ceiling. assume the springs mass is negligible. i hang a 0.5kg mass on the spring
A string is fixed at both ends and is vibrating at 119 Hz, which is its third harmonic frequency. Determine the length of the string
A boxer swings with a roundhouse punch to an opponent's head. Determine the velocity of her glove when it makes contact in m/s
In the figure to the left, the pulley (which is in the form of a disk) has a mass of 7.50 kg and a radius of 35 cm. What is the speed of the iron block
a two-resistor voltage divider employing a 3.3-kq and a 6.8-kq resistor is connected to a 9-v ground-referenced power
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