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Explain why food stays fresh longer when kept in the refrigerator.
In the stratospheric level of the atmosphere there is a high level of ozone, O3. This ozone absorbs much of the ultraviolet light from the sun and thus protects life in the surface of the Earth from harmful high level of ultraviolet radiation.
Explain why one chlorofluorocarbon (CFC) molecule in the ozone layer is capable of breaking down hundreds and even thousands of ozone molecules?
a spherical void of radius r has cut inside the sphere, find the electric field inside the void if its center is displaced by vector R
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. find How long was the ball in flight
an ion having charge 6e is traveling horizontally to the left at 8.60kms when it enters a magnetic field that is
An object moves with constant acceleration 3.55 m/s2 and over a time interval reaches a final velocity of 12.8 m/s.
To stretch a certain spring by 3.00cm from itsequilibrium position requires 9.50J of work, What is the force constant of this spring
If the average frequency emitted by a 200,-, rm W light bulb is 5.00 times 10^ {14}, {rm Hz}, and 10.0 percent of the input power is emitted as visible light, about how many visible-light photons are emitted per second.
hanging wire has a length of 1.90m . when a steel ball of mass 51.0 kg is suspended from the wire the wire stretches by
A 100 gram aluminum calorimeter contains 250 gram of water. The two metals are in thermal equilibrium at 10°C. Compute the specific heat of the unknown sample
q1. a mass-spring system oscillates on a horizontal frictionless surface with amplitude of 3.89 cm. if the spring
What average thermal power is produced as rock stops?
Two 10-cm-diameter charged rings face each other, 28cm apart. What is the magnitude of the electric field E? at the midpoint between the two rings
A neutron at rest decays into a proton and a electron. How much Kinetic energy (in MeV) is shared by the electron and the proton?
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