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A cart is driven by a large propeller or fan, which can accelerate or decelerate the cart. The cart starts out at the position x = 0 m, with an initial velocity of + 4.3 m/s and a constant acceleration due to the fan. The direction to the right is positive. The cart reaches a maximum position of x = + 12.5 m, where it begins to travel in the negative direction. Find the acceleration of the cart.
A laser emits a narrow, circular beam of light. The radius of the beam is 1.37×10-3 m, and the power is 1.44×10-3 W
The speed of light in a particular type of glass is 1.69 108 m/s. What is the index of refraction of the glass
a 0.50 uF capacitor is charged to a 12V battery. How much electrical potential energy is stored in the capacitor
A thin, uniform rod is hinged at its midpoint. To begin with, one half of the rod is bent upward and is perpendicular to the other half. What is the angular velocity of the straight rod
A 60.0 g bullet is fired from a muzzle velocity of 525 m/s from a gun with mass 4.50 kg and a barrel length of 55.0 cm, Find the bullet's momentum as it leaves the barrel
The temperature inside a house is 25 degree C while the temperature outside is 10 degree C. Approximately how much energy is radiated per second
A proton and an electron are fixed in space with a separation of 957 nm. Calculate the electric potential at the midpoint between the two particles. Find the magnitude and direction of the electric field at the same point.
A hollow aluminium cylinder is to be fitted over a steel piston. At 22°C the inside diameter of the cylinder is 99.2 percent of the outside diameter of the piston. To what common temperature must the two pieces be heated in order that the cylinder ju..
A 47-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord
A rocket is fired from the ground but at 30m it runs out of fuel, How fast is it going when it comes back down to earth
a car tyre is pumped up to 230 kpa. what is the volume of air at atmospheric pressure 100kpa that must be pumped into a
Use the Bohr model to calculate the wavelength λ of the photon emitted when the electron in a hydrogen atom falls from the n = 5 level
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