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The air inside a bicycle tire pump has 172 joules of work done on it as 64.8 joules of heat is conducted away from it
A bungee cord is stretched between two poles with a force of 415 N. What is the velocity of a wave on this bungee cord
A 418 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 1.7 meters
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 3.6 cubic meters of sea water. What is the buoyant force acting on the object
A 0.058 kg aluminum bullet traveling at 481 m/s strikes an armor plate and comes to a stop. what is the bullet's temperature change in degrees Celsius
If the gauge pressure of the blood at your heart is 13.25 kPa and your body doesn't compensate, what would the pressure be at your head, 57.4 cm above your heart
A large man sits on a four-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg. what pressure does each leg exert on the floor
x rays with a wavelength of .12nm undergo first-order diffraction from a crystal at 80 degree angle of incidence
what is the speed of an electron with a de Broglie wavelength of .29nm, What is the speed of a proton with a de Broglie wavelength of .29nm
what is the speed of a 200g baseball with a de Broglie wavelength of .18nm, what is the de Broglie wavelength of a 200g baseball with a speed of 20 m/s
A very small circular metal ring of radius r=0.5cm and resistance x=5ohms is that the center of a large concentric circular metal ring of raduis R=50cm, What is the magnitude and direction of the av
a hydrogen atom is in the n=15 state. In the Bohr model, how many electron wavelengths fit around this orbit
The sun radiates energy at the rate 3.8*10^26W. The source of this energy is fusion, a nuclear reaction in which mass is transformed into energy. Estimate the lifetime of the sun
There are 5 pairs of plates: A,B, and D are charged plastic plates and C is an electrically neutral copper plate. A is attracted to B, C to A, C to D, B to D, How can you tell if they attract or do
A cylindrical wire is carrying a current that is non-uniform in both space and time, Find an equation that describes magnetic field inside the wire due to the current as a function of r from the cent
You are standing at x=8.0km Lightning bolt 1 at x=0km and lightning bolt 2 at x=13.0 km. If your assistant didn't see the flashes at the same time, what is the time difference between the two flashes
What fraction of the power radiated by the sun is intercepted by the planet Neptune? The radius of Mercury is 2.48 107 m
consider the bohr model of the one ecectron atom Be+3, calculate the radius,in nm,of ground state orbital
When two capacitors are connected in parallel across a 10.0 V rms, 1.0 kHz oscillator, the oscillator supplies a total rms current of 523 mA. What are the values of the two capacitors
Suppose that each of a person's hands makes contact with a different conductor over a surface area of 11.0 cm2. Find the resistivity of the skin
According to the law x =a sin2(wt - pi/4), a point moves along the x axis, Find the amplitude & period of oscillations
A 5.0 kig block is hung from the ceiling on a 2.0-meter-long wire with a mass of 4 g. How long does it take the pulse to reach the ceiling
A 1000 kg roller coaster starts from rest at height H= 25 m above the bottom of a 14 m diameter loop. What is the downward force of the track on the car
A 2.8{\rm kg} block of wood sits on a table. A 3.0 {\rm g} bullet, fired horizontally at a speed of 370{\rm m/s} , What is the speed of the block immediately after the bullet exits
A 70.0kg archer, standing on frictionless ice, shoots a 100g arrow at a speed of 50m/s. What is the recoil speed of the archer