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0.5 kg of ice slowly melts. The latent heat of fusion is 80 kcal/kg. By how much does the entropy of the ice change
A man traveling on a bicycle at 10 m/s along a straight road that runs parallel to some railroad tracks. What frequency is heard by a stationary observer located between the train and the bicycle
a record is turning at the rate of 33 r.p.m. when the 45 r.p.m. button is pressed. what is the angular acclereration of the record
An ideal gas expands at a constant pressure of 2.1 atm from 457 mL to 713 mL. Heat then flows out of the gas, at constant volume, What is the total heat flow into the gas
Lithium, beryllium, and mercury have work functions of 2.30eV,3.90eV, and 4.50eV respectively. Find the maximum kinetic enery for the photoelectrons in each case
A 2.5 meter long elastic cord is fixed at both ends. at what frequency should this cord be vibrated such that a n-10 standing wave is produced
The photoelectric effect experiment is often carried out by using a mercury light source to illuminate a particular surface. What is the work function of this surface
a harvest mouse can detect sounds as quiet as -10 dB. suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby at the entrence to its nest, How far is the harvest mou
A ray of 600 nm light traveling through air is incident on a slab of diamond (n=2.41) at an angle of theta=60 to the normal. What is the wavelength of light inside the diamond
A man driving a car toward a large vertical wall sounds his horn. The car is traveling at 81 km/h. What is the frequency of the car's horn
An apparatus shown constists of a pair of charge parallel plates (shown edge-on) in a uniform magnetic field of 1.50 T, obtain magnitude of the electric field between the plates
A laser beam is incident on two slits with a separation of 0.210 mm, and a screen is placed 5.30 m from the slits. what is the wavelength of the laser light
When ultraviolet light with a wavelength of 250 nm is incident on a particular metal surface, What is the threshold frequency for this particular metal
A 10.0-m long string is moved up and down with simple harmonic motion with a frequency of 33 Hz. Determine the velocity of the wave on the sting
A 2.5 kg stone is dropped from a height of 4m. What is its momentum on impact
A solid piece of an unknown material wights 96.9 N in air and 59.6 N when submerged in water. The density of water is 1000 kg/m3, Determine the density of the material
A wooder raft has mass of 76kg. When empty it floats in water (density 1000 kg/m^3) with 40% of its volume submerged
A beam of light of wavelength 569 nm traveling in air is incident on a slab of transparent material. Find the index of refraction of the material
A ferromagnetic metal at very low temperatures has a specific heat capacity given by c(T)= zT+yT^3+zT^(3/2). find the entropy increase due to this process
When a certain element is bombarded with high-energy electrons, Determine the atomic number Z of the element.
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 4 excited state. determine the photon wavelengths of the first transitions
For a hydrogen atom, determine the ratio of the ionization energy for the n = 4 excited state to the ionization energy for the ground state
A perfectly inelastic collision (both cars stick together after the collision) occurs between a 2000kg car moving at 7m/s, What is the velocity of the cars immediately after impact
The nucleus of the hydrogen atom has a radius of about 1.1x10^-15 The electron is at a distance of about 5.29 Ã- 10-11 m from the nucleus. compute the volume of the atom
A certain helium-neon laser pointer, emitting light with a wavelength of 632 nm, How many photons are emitted by the laser pointer