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A) What is the energy range (in joules) of photons of wavelength 400nm to 760nm ?
B) What is the energy range (in eV) of photons of wavelength 400nm to 760nm ?
Describe two different energy alternatives to fossil fuels in detail. Discuss how they work, how they compare with fossil fuels, and their relative advantages and disadvantages.
Radioactive isotopes often occur together in mixtures. assume a 480 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days.
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
A ‘U' shaped pipe contains a liquid that is sealed at both ends by pistons. Determine the downward force
A star is moving away from the Earth at the speed of 200 km/s. What will be the wavelength of a spectral line that would have the wavelength of 500 nm if the star were at rest.
A negative charge orbits a positive charge. The orbit is a perfect circle, What is the period of the orbit of the negative charge
In a college homecoming competition, eighteen students lift a sports car. Though holding the car off the ground, each student exerts an upward force of 390 N. What is the mass of the car in kilograms? What is its weight in pounds.
A helicopter is ascending vertically with a speed of 5.30{rm m/s}. At a height of 120 {rm m} above the Earth, package is dropped from a window.
A charge of 0.43 C is spread uniformly throughout a 36 cm rod of radius 7 mm. What are the volume and linear charge densities?
Pete slides a crate up a ramp with constant speed at an angle of 27 degrees by exerting a 133 N force parallel to the ramp. How much work has been completed against gravity when the crate is raised a vertical distance of 1.6 m? The coefficient of fri..
The wheel of a car has a radius of 0.360 m. The engine of the car applies a torque of 327 N·m to this wheel, What is the magnitude of the static frictional force
An asteroid is discovered heading straight toward Earth at 13km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 mins, after which the asteroid is moving at 28 degrees to its original path at a..
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