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The ring has zero radial velocity at its initial position, a distance of r0 = 0.295 m from the fixed end. Determine the radial velocity of the ring as it reaches the moving end of the rod.
If a 120 lb. soil is placed in the wheelbarrow with its center of gravity 1.5 ft. from the axle, what force is required to raise the legs of the wheel barrow?
A spring is hanging vertically from a ceiling. (Assume the spring's mass is negligible.) I hang a 0.5kg mass on the spring and let the spring slowly stretch to an equilibrium position.
Use energy conservation to find the distance along the incline that the block slides before coming to rest.
Drops of rain fall perpendicular to the roof of a parked car during a rainstorm. The drops strike the roof with a speed of 12m/s, and the mass of rain per second striking the roof is 0.035 kg/sec.
(a) If the block travels a distance of 4.5m along the surface, what is the work done by the rope? (b) Find the work done by friction on the block.
A projectile is fired with a speed of |v| = 60 m/s at angle of 60 degrees. A second projectile is then fired with the same speed 0.5 s later. Determine the angle of the second projectile so that the
If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the magnitude of the velocity of the cars be immediately after the collision? (wants an answer in km/h,
How long does it take the flywheel to reach top angular speed of 1000 rpm?
A 1.5 kg ball and a 2.2 kg ball are connected by a 1.0 m long rigid, massless rod. The rod is rotating cw about its center of mass at 30 rpm. What torque will bring the balls to a halt in 4.4 s?
The electron in a hydrogen atom with an energy of-.544 eV is in a subshell with 18 states. a) What is the principal quantum number, n for this atom?
The alpha particle will come to rest when all is initial kinetic energy has been converted to electrical potential energy. Find the distance of closest approach between the alpha particle and the go
Give a strategy that allows you to use the preceding information to calculate work function and cutoff frequency for this surface. Carry out your strategy and determine the work function and cutoff
This coil is placed inside a solenoid, with coil and solenoid axes aligned. The solenoid has 3200 turns and is 23 cm long. At what rate must the current in the solenoid be increased to induce a 1.1 mA
To see why, consider a 9 V battery supplying 3.0 A to an electromagnet with inductance 2.6 H. A switch in this circuit opens and the current drops to zero in a mere 6.7 ms. What's the emf induced in
If an alternator coil is 17 cm in diameter and is spinning at 1150 revolutions per minute in a 0.11 T magnetic field, how many turns must it have to produce a 14 V peak output?
Two 57.5 kW radio stations broadcast at different frequencies. Station A broadcasts at a frequency of 892 kHz and station B broadcasts at a frequency of 1410 kHz. Which stations emits more photons p
Light of frequency 9.95 x 10^ 14 hz ejects electrons from the surface of silver. IF the maximum kinetic energy of the ejected electrons is .18 x 10^ -19 J what is the work function of silver?
When a person visits the local tanning salon, they absorb photons of ultraviolet light (UV) to get the desired tan. What are the frequency and wavelength of a UV photon whose energy is 6.5 x 10^-19
The second order maximum produced by a diffraction grating with 560 lines per centimeter is at an angle of 3.1 degrees. What is the wavelength of the lights that illuminates the grating?
A diffraction grating with 345 lines/nm is 1 m in front of a screen. What is the wavelength of light whose first-order maxima will be 16.4 cm from the central maximum on the screen?
The microphone is 2.25 m from midpoint of the two speakers. What are the lowest two frequencies that produce an interference maximum at the microphone's location?
A large crate of mass 1.5*10^3kg is at rest at the top of an incline of slope 15 degrees. It slides 20 m down the incline. at the bottom its speed is 8m/s. calculate: a) the change in kinetic energy
The rms speed of the molecules in 1.3 g of hydrogen gas is 1600 m/s. What is the total translational kinetic energy of the gas molecules?
Jupiter's moon Io is has an orbital radius of 421,000 km, around the planet Jupiter (MJ = 1.9 x 10^27 kg). Io's radius is 1821 km and its mass is 8.93 x 10^22 kg. Calculate the tensional force insid