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A 230 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.250 s. The total energy of the system is 1.00 J. Find the force constant of the spring.
It has been suggested that rotating cylinders about 8 mi long and 6.1 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acc
A 1900 kg car traveling to the right at 22 m/s is chasing a second car of the same mass that is traveling to the right at 10 m/s. What fraction of the initial kinetic energy of the cars is lost dur
Allylchloride, Why it is easy to remove the Cl from allylchloride?
Ricardo notices that the canoe moved 50.3 cm relative to a submerged log during the exchange and calculates Carmelita's mass, which she has not told him. What is it?
An Earth observer measures the two spaceships to be the same length. If the slower spaceship is moving with a speed of 0.332 c, determine the speed of the faster spaceship.
The focal length of a relaxed human eye is approximately 1.86 cm. When we focus our eyes on a close-up object, we can change the refractive power of the eye by about 18 diopters. Calculate the foca
A 1100 N crate is being pulled across a level floor by a force F of 325 N at an angle of 33° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Fi
Calculate the minimum amount of energy, in joules, required to completely melt 140 g of silver initially at 14.0°C.
A woman stands on a scale in a moving elevator. Her mass is 57.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. Dur
A 10.0 liter gas cylinder is filled with N2 to a pressure of 75.0 atmospheres. How many moles of N2 does one have to add to raise the pressure to 125 atmospheres. Assume a constant temperature of 25
When the wax melts, the block slides out to the end of the rod. What is the final angular velocity? Give your answer in rpm.
A hiker's trip consists of three segments. Path A is 8.0km long heading 60 degrees north of east. Path B is 7.0km long in a direction due east. Path C is 4.0km long heading 315 degrees counterclockw
Boiling point of water at 750 mm Hg is 99.63C. Calculate the amount of sucrose to be added to 500 g of water such that it boils at 100C. kb=0.52 k kg/mol
A 2.0 kg block is attached to a string that is wrapped around a 4.0 kg, 4.0-cm-diameter hollow cylinder that is free to rotate. (Use the figure below, but treat the cylinder as hollow.) The block is
A charge Q is located inside a rectangular box. The electric flux through each of the six surfaces of the box is: 1 = +1600 N · m2/C, 2 = +4000 N · m2/C, 3 = +1600 N · m2/C, 4
The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 6 x 10-3 s. What is the change in momentum of the ball.
(a) What was the magnitude of the centripetal acceleration of the rock when it was on the string? (b) What was its speed when it was on the string?
What is the calculated pH of the solution if there is initially 2.0mL of acetic acid at an initial concentration of 0.89M and 0.80mL of 1.0M HCl is added?
A 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M LiOH. Determine the pH of the solution before the addition of any LiOH.
A 35.0g bullet moving at 475m/s srikes a 2.5kg bag of flour that is on ice, at rest. The bullet passes through the bag and exits it at 275m/s. How far is the bag moving when the bullet exits?
Find the length of a bicycle being ridden at a speed of 20.0 mi/h as measured by an observer sitting on a park bench, given that its proper length is 1.90 m.
Ethylene glycol, the main component of automotive engine coolant, has a specific heat of 2.35 J/g.oC. Calculate the amount of heat required to raise the temperature of 1.00 kg of ethylene glycol fro
A space station, in the form of a wheel 125 m in diameter, rotates to provide an "artificial gravity" of 3.10 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of r