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Get college assignment help at uniessay writers The combination of an applied force and a frictional force produces a constant torque of 21 N · m on a wheel rotating about a fixed axis. The applied force acts for 5.9 s, during which time the angular speed of the wheel increases from 0 to 12 rad/s. What is the moment of inertia of the wheel? Answer in units of kg · m2.

Consider an electron, mass m = 0.9*10^-30 kg, in an infinite well that is 2 cm wide. For what value of n will the electron have an energy of 1 eV?

A 61.9 kg person jumps from rest off a 2.86 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.13 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This force is nonconservative.

1. Given: Length = 6 ft, Width = 3 ft and Height = 10 ft. Find volume of rectangular object: ______________________________________________________________________________ 2. Given: diameter of cylinder = 20ft height of cylinder = 25 ft Find volume of cylinder: _______________________________________________________________________________ 3. Given: Mass of hydrogen gas = 3.5 grams Volume of hydrogen gas = 40 L Find Density of gas; ______________________________________________________________________________ 4. Given: Density of object = 5.6 g/cm3 and the mass of object = 4,580 g Find Volume of object: ______________________________________________________________________________ 5. A cylinder 6 cm in diameter and 30 cm long is made of brasss Density = 8.5 g/cm3 Find the mass of the brass ? ___________________________________________________________________________ 6. Given: weight (force) of block = 3,500 lbf Dimensions = 6o in (L) x 20 in (W) x 72 in (H) Find Pressure exerted by Block: Pressure = Force/Area _______________________________________________________________________________ 7. Given: weight (force) of granite 956 lbf Dimensions = 110 in (L) x 15 in (W) x 72 in (H) Find Pressure exerted by Block: Pressure = Force/Area _______________________________________________________________________________ 8. Given : Height (h) of tank = 30 ft; specific gravity of hydrocarbon in tank = 0.72; vapor pressure of hydrocarbon = 430 psi Calculate pressure in bottom of tank Pressure = h x (0.433 psi/ft) x specific gravity Vapor Pressure _______________________________________________________________________________ 9. Given: Height (h) of water in tank = 19.5 ft Calculate pressure in the bottom of the tank _____________________________________________________________________________ 10. Given : Scuba diver goes down depth (h)105 ft in ocean. Calculate pressure exerted on diver 1. The temperature of a 4.00 L sample of gas is changed from 10.0 °C to 20.0 °C. What will the volume of this gas be at the new temperature if the pressure is held constant? 2. A 600.0 L sample of nitrogen is warmed from 77.0 °C to 86.0 °C. Find its new volume if the pressure remains constant. 3. Solve the Charles’ Law equation for V2. 4. Charles’ Law deals with what quantities? a. pressure/temperature b. pressure/volume c. volume/temperature d. volume/temperature/pressure 5. A container of oxygen has a volume of 30.0 mL and a pressure of 4.00 atm. If the pressure of the oxygen gas is reduced to 2.00 atm and the temperature is kept constant, what is the new volume of the oxygen gas? 6. A tank of nitrogen has a volume of 14.0 L and a pressure of 760.0 mm Hg. Find the volume of the nitrogen when its pressure is changed to 400.0 mm Hg while the temperature is held constant. 7. You are now wearing scuba gear and swimming under water at a depth of 66.0 ft. You are breathing air at 3.00 atm and your lung volume is 10.0 L. Your scuba gauge indicates that your air supply is low so, to conserve air, you make a terrible and fatal mistake: you hold your breath while you surface. What happens to your lungs? Why? 8. Boyle’s Law deals what quantities? a. pressure/temperature b. pressure/volume c. volume/temperature d. volume temperature/pressure 9. Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 20.0 °C to 30.0 °C. 10. A gas has a pressure of 0.370 atm at 50.0 °C. What is the pressure at standard 400 K? 11. 500.0 liters of a gas are prepared at 700.0 mm Hg and 200.0°C. The gas is placed into a tank under high pressure. When the tank cools to 20.0 °C, the pressure of the gas is 30.0 atm. What is the volume of the gas? 12. A gas is heated from 263.0 K to 298.0 K and the volume is increased from 24.0 liters to 35.0 liters by moving a large piston within a cylinder. If the original pressure was 1.00 atm, what would the final pressure be?

stone has a mass of 6.0 x 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.90. When the tire surface is rotating at a maximum speed of 13 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N.

If an object has a moment of inertia 21 kg·m2 and rotates with an angular speed of 111 radians/s, what is its rotational kinetic energy?

A 20.0 child plays on a swing having support ropes that are 2.30 long. A friend pulls her back until the ropes are 43.0 from the vertical and releases her from rest.

A stone of mass 0.31 kg is tied to a string of length 0.50 m and is swung in a horizontal circle with speed v. The string has a breaking-point force of 45 N. What is the largest value v can have without the string breaking?

What beat frequencies are possible with tuning forks of frequencies 266, 269, and 271 Hz? 1 3Hz, 4Hz, 5Hz 2Hz, 3Hz, 5Hz 1Hz, 2Hz, 3Hz 2Hz, 3Hz, 4Hz .

A 740 g block is released from rest at height h0 above a vertical spring with spring constant k = 350 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 18.8 cm. How much work is done (a) by the block on the spring and (b) by the spring on the block? (c) What is the value of h0? (d) If the block were released from height 3h0 above the spring, what would be the maximum compression of the spring?

Get college assignment help at uniessay writers a child is riding a merry-go-round which completes a revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. What is the magnitude of the centripetal acceleration of the child?

A loudspeaker of mass 23.0 {rm kg} is suspended a distance of h = 2.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30 {rm m}.

A river flows due east at 1.70 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 15.0 m/s due north relative to the water. a)What is the velocity of the boat relative to shore? b)If the river is 270 m wide, how far downstream has the boat moved by the time it reaches the north shore?

A cart of mass M = 1.70 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley connects the cart to a hanger with mass m = 1.25 kg. The cart is released from rest, allowing it to roll, pulled by the falling hanger. What is the formula for the acceleration a of the cart in terms of the cart’s mass M, the hanger’s mass m, and the acceleration of gravity g?

A ball is projected upward at time = 0.0 s, from a point on a roof 50 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is Consider all quantities as positive in the upward direction. The velocity of the ball when it is above the ground is closest to:

Determine how many calories of heat must be removed to change 100g of vapor at 240°C to solid at 20°C. Consider the following properties of the substance: heat of fusion 300 cal/g, heat of vaporization 600 cal/g, specific heat capacity as a liquid -0.75 cal/g-Co, melting point at 20°C and boiling point of 240°C.

an object of mass m1 on a frictionless horizontal table is connected to an object of mass m2 through a very light pulley P1 and a light fixed pulley P2 as shown below.

The pulley system in the figure is used to lift a crate of mass m = 59-kg. Note that a chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume that the masses of the chains, pulleys, and ropes are negligible.

A 40.0-kg box initially at rest is pushed 5.00 m along a rough, horizontal floor with a constant applied horizontal force of 130 N. If the coefficient of friction between box and floor is 0.300, find (a) the work done by the applied force, (b) the increase in internal energy in the boxfloor system due to friction, (c) the work done by the normal force, (d) the work done by the gravitational force, (e) the change in kinetic energy of the box, and (f) the final speed of the box.

A positive point charge q sits at the center of a hollow spherical shell. The shell, with radius R and negligible thickness, has net charge – 4.00 q. Find an expression for the electric field strength outside the sphere, r> R.

1. (30 pts) Two charges, q1 = -80 nC and q2 = 50 nC are placed 3 m apart as shown. The (x,y) coordinates of the charges and two other points in meters are indicated. a. (5) Find the electric potential at points A and B

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November 3, 2019