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A large balloon of mass 233 kg is filled with helium gas until its volume is 327 m3. Assume the density of air is 1.29 kg/m3, Calculate the buoyant force acting on the balloon
Double slits of 0.115 mm separation are placed at the front of a lecture room that is 17.1 m long. what is the separation between the first two bright fringes
A magnetic field points perpendicular into a 5x12 cm rectangular coil of 44 turns and resistance .25 omega. what magnitude of emf is being induced in the coil
At some location, earths magnetic field is B earth= 0.52 gauses and points north, at 55.0 degrees below horizontal line. find the magnitude of the magnetic force on a 25 m long segment of power line
What potential is generated on a plane's wings when it flies through the earth's magnetic field
In a certain experiment, the pressure of a gas depends on the volume by P=alphaV^3+betaV^2, What is the work done on the gas
The Ed-Scale defines the perfect temperature of a martini to be 14 degrees E and the boiling point of antifreeze to be 100 degrees E. Use this equation to find the freezing point of water in Eds
Suppose the tension in a cord is 12.0 N. If the speed of a wave in the cord is 9.50 m/s, then what must be the linear mass density of the cord
A loop of wire with radius R has charge density 3theta^2 , where theta is in radians. Write an integral (but do not solve) to find the electric potential at the center of the loop
The activity of a freshly prepared radioactive sample is 1010 disintegrations per second, whose mean life is 109 s. find the mass (in mg) of the radioactive sample
A proton is projected in the positive x direction into a region of uniform electric field Earrowbold = (-5.40 multiplied by 105) i hat bold N/C at t = 0. Determine the acceleration of the proton
An electron and a proton are each placed at rest in a uniform electric field of magnitude 556 N/C. Calculate the speed of each particle 47.6 ns after being released
The ball thrower, who has a mass of 100 kg, can throw a 500 g ball with a speed of 10 m/s. What constant force must the athlete exert on the ball
A beetle 4.80mm is examined with magnifier of focal length 10.3 cm. If the observer's eye is relaxed while using the magnifier, what is the apparent length of the beetle
What is the minimum diameter mirror on a telescope that would allow you to see details as small as 4.90 km on the moon some 384000 km away
What is the maximum number of lines per centimeter a diffraction grating can have and produce a complete first-order spectrum for visible light
Find the range of visible wavelengths of light in Plexiglas. (Assume that the range of visible wavelengths of light in air is 380 - 760 nm.)
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.843 rad/s. You, with a mass of 71.9 kg, estimate the total angular momentum of the system
Big yellow fishing swimming at 2.0m/s swallows little green fish at rest. What fraction of big yellow fish's initial kinetic energy was lost is this collision
A 70kg block is pushed 5m up an incline against a friction force of 50N. The block is pushed to a height 1m above the ground. How much work is done by the person on the block
A solid sphere of mass 2.5 Kg and a radius .15m starts from rest at the top of the ramp inclined 15 degrees, and rolls to the bottom without slipping. What is the total kinetic energy of the sphere
Suppose you are using total internal reflection to make an efficient corner reflector, what must be the minimum index of refraction of the material
A narrow beam containing red (660 nm) and blue (470 nm) wavelengths travels from air through a 2.60 cm thick flat piece of crown glass, By what distance are the red and blue separated when they emerg
The flywheel of a gasoline engine is required to give up 510J of kinetic energy while its angular velocity decreases from 630rev/min to 480rev/min, What moment of inertia is required
A simple of helium gas occupies 5 liters at 22degree C and a gauge pressure of 200,000 pascals. What is the mass of the gas