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A child slides down a slide with a 26° incline, and at the bottom her speed is precisely half what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
A 58.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.38 102 m/s from the top of a cliff 156 m above level ground, What is the initial total mechanical energy of the projectile
A car and driver have a combined mass of 100 kg. What is the force of the hill on the car as it passes over the top
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is ? = 3.00 10-7 C/m2, and the plates are separated by a distance of 2.9 10-2 m. How fast is the electron moving just bef..
A roller coaster car has a mass of 500 kg loaded with passengers. The car passes over a hill of radius 15m, What is the force of the track on the car at the top of the hill
The pendulum is now swinging on Pluto. Calculate the new period of oscillation in terms of T, knowing that on Pluto the gravity is 1/16 of gravity on the Earth
A city employee wanted to measure the height of a tall tree. The employee stood 9.50 m from the base of the tree; and he saw that his line of sight made an angle of 65.2 degrees above the horizon,
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = -28.0 cm). How far is the object from the converging lens
A pulley with a radius of 10.0 cm is mounted on an axle that passes through the center of the pulley. calculate the number of revolutions the pulley has made
The maximum current in a 26?F capacitor connected to an ac generator with a frequency of 110Hz is 0.15 A. What is the maximum voltage of the generator
An ideal gas occupies a volume of 1.8 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container
A red blood cell typically carries an excess charge of about -2.5 × 10-12 C distributed uniformly over its surface. What is the surface charge density on the red blood cell
A beam of natural light with an irradiance of 330 W/m^2 impinges on the first of two consecutive ideal linear polarizers whose transmission axes are 67.0° apart
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