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A 400g mass is attached to cord 1.2m in length. It is pulled to the left until the angle with the vertical is 30 degrees, and then released. What is the speed of this mass when it passes through the lowest point?
Using the mass-luminosity relationship if a main sequence star has a luminosity of 3000 times the luminosity of the Sun, what is its mass in relation to the Sun?
The rails are laid on a winter day when their temperature is 1.8°C. (a) How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 32.2°C
A pinhole camera is made from an 82cm -long box with a small hole in one end, how tall will the image of the person on the film be
a hoop and a disk both of 0.38- m radius and 3.0- kg mass are released from the top of an inclined plane 3.3 m high and
The electric field near the surface of Earth points downward and has a magnitude of 156 N/C. What is the ratio of the magnitude of the upward electric force on an electron to the magnitude of gravitational force on the electron?
A person whose eyes are 1.80 m above the floor stands in front of a plane mirror. The top of her head is 0.15 m above her eyes. What is the height of the shortest mirror in which she can see her entire image?
The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. determine the speed of the lighter box
A driver is traveling at 72 km/hr when she sees a red light in the distance. She keeps traveling at this speed for two seconds, and then applies the brakes, decelerating the car to a stop at a rate of -5 m/s2. Compute her total stopping time, measure..
An infinitely long cylindrical non-conductor is uniformly charged with a volume density of 6 C/m3. The cylinder has a radius of 8 cm. Calculate the electric field at a distance of 1 m from the axis of the cylinder
a 15 g bullet is fired into the bob of a ballistic pendulum of mass 1.8 kg. when the bob is at its maximum height the
The Sun's corona sends high energy protons and electrons towards the Earth (the Solar Wind). A typical solar wind proton has an energy of K=6.0 KeV (thousand electron volts). An eV (electron volt) is the kinetic energy an electron gains when it mo..
A water line with an internal radius of 5.06 x 10-3 m is connected to a shower head that has 12 holes. The speed of the water in the line is 1.18 m/s. What is the volume flow rate in the line
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