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A diffraction grating has 4272 lines/cm. Calculate the width of the dark area between the first and second order spectra on a screen 3.3 m away
A test tube standing vertically in a test tube rack contains 2.2 cm of oil, What is the gauge pressure on the bottom of the tube
You throw a 13 g rock and it leaves your hand at a speed of 17 m/s. What is the de Broglie wavelength of this rock
A low-power laser used in a physics lab might have a power of 0.55 mW and a beam diameter of 2.6 mm. Calculate the average light intensity of the laser beam
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor, How tall is the tower
If the shortest-wavelength bremsstrahlung X-rays emitted from this tube is 23.40 pm, what is the voltage across the X-ray tube
A hydrogen atom is in the 2s state. Determine the principal quantum number and the energy of the state
An electron remains in an excited state of an atom for typically 10-8 s. What is the minimum uncertainty in the energy of the state
Consider an airless, non-rotating planet of mass M and radius R. Calculate the ratio h/R of the projectile's maximum height to the planet's radius
If there is a section of the hose where the diameter decreases to 1.93 cm, what is the speed of the water in this section
An undersea research chamber is spherical with an external diameter of 5.20 m. The mass of the chamber, when occupied, is 66400 kg. find the buoyant force on the chamber
A certain raft is 2.5 m long, 0.55 m wide, and 14 cm deep. If the raft itself has a mass of 15.6 kg, what is the maximum mass it can support in fresh water
One arm of a U-shaped tube (open at both ends) contains water, and the other alcohol. at what height will the water be
A hydraulic lift is used to jack a 970 kg car 13 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 250 N. Calculate the combined work input of all of the strokes
When a wilf fire approaches a residentail area, a house owner climbs up to the roof, what is the minimum water pressure of the source(faucet) end of the hose
A swimming pool 2.6 m by 1.0 m has a uniform depth of 2.0 m, What is the absolute pressure at the bottom of the pool
When your friend is riding a 6.50-kg bicycle, the weight is supported more on the back tire and less on the front tire. what is your friend's weight
You win a lottery prize consisting of all the gold you can put into a backpack with dimensions 68 cm x 29 cm x 15 cm
A 5.8 m diameter merry-go-round is rotating freely with an angular velocity of 0.90 rad/s. What is the angular velocity of the merry-go-round now
A sound generator simultaneously produces two different frequencies, 240 Hz and 360 Hz. What will be the frequency of the third tone
A sound wave in our classroom has speed of 380 m/s. There is a speaker at each end of the table that has 4.0 m length. What is the minimum phase difference between the waves arriving to you from the t
A guitar string has a tension on it of 6500 N and length of 1.2 m. what is the linear mass density of the string
The electric field between the plates of a paper-separated (K=3.75) capacitor is 8.23×104V/m . The plates are 1.90mm apart, Determine the area of each plate
A 31.0 omegacap.gif resistor and an 16.0 omegacap.gif resistor are connected in series across a 15.0 V battery. What is the voltage out of the battery
The band gap of the semiconductor gallium arsenide (GaAs) is 1.43 eV , and the bandgap for the semicondcutor aluminum gallium arsenide (AlGaAs) is 2.06 eV. find the maximum wavelength absorbed by Ga