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A solid sphere of mass 6.0 kg is mounted on a vertical axis and can rotate freely without friction. A massless cord is wrapped around the middle of the sphere and passes over a 1.0 kg pulley and is attached to block of mass 4.0 kg, as shown. What is the speed of the block after it has fallen 80 cm? Treat the pulley as solid cylinder.
What was the displacement of the spring. An elevator and its load have a combined mass of 1400 kg. Find out the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration i..
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
A cylindrical container of inside diameter 0.6 m is filled with gasoline to a depth of 2 m. What is the mass of the gasoline?
A 11.0g bullet is fired horizontally into a 103g wooden block that is firstly at rest on a frictionless horizontal surface and connected to a spring of constant 154N/m. The bullet becomes embedded in block. If the bullet-block system compresses the s..
A 2.5 mol sample of helium gas initially at 300 K and 0.400 atm is compressed isothermally to 1.30 atm. Note down that the helium behaves as an ideal gas.
An important feature of the Carnot cycle is that: A) its efficiency can be 100% B) its efficiency depends on the absolute temperature of the hot reservoir used.
Create a visual display for a tennis ball rolling horizontally along a table and as it goes off the table. Sketch and label all forces acting on the ball in as a minimum three different locations of its motion.
A person walks up a stalled 14 m long escalator in 81 s. When standing on the same escalator, now moving, the person is up in 48 s. How much time would it take that person to walk up the moving escalator?
If a power plant burns coal at 1000°C and the air temperature where the exhaust fumes cool is at 20°C, what is the maximum efficiency of the power plant?
Two particles with Q1 = 50 µC and Q2 = 79 µC are initially separated by a distance of 2.4 m, What is the change in the electric potential energy
A 300 kg piano slides 4.50 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
Earth's atmosphere, the electric field above Earth's surface has been measured to be 150 N/C downward at an altitude of 250 m and 165 N/C downward at the altitude of 400 m. compute the volume charge density of the atmosphere.
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