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It is believed that the universe began with a big bang about 17 billion years ago. Neglecting the expansion of the universe, we can reason that the most distant objects observable are no further than the distance light could have traveled in 1.7 × 10^10years.
If the speed of light is 2.99792 × 10^8, what is the maximum possible radius of the observable universe?
A flywheel is spinning with its axle pointing along the east-west direction. You are standing west of the flywheel facing toward it. What is the direction of the flywheel's angular velocity
q1. two trains each having a speed of 38 kmh are headed at each other on the identical straight track. a bird that can
A music store has jazz, classical, country-western and rock music albums on tapes and CDs in the following quantities finding the probability.
A 0.5 kg block of ice is sliding by you on a very slippery floor at 2.5m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with ice block for 0.0025 seconds.
The brakes of a truck cause it to slow down by applying a retarding force of 7710 N to the truck over a distance of 1050 m. What is the work done by this force on the truck
Physics two skaters with masses of 65 kg and 45 kg, respectively stand 8.0 m apart each holding one end of a rope. If they pull themslevles along the the rope until they meet explain how far does each skater travel?
An 8000-kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs.
Five moles of an ideal monatomic gas with an initial temperature of 128 C expand and, in the process, evaluate the final temperature of the gas
A brass wire is to withstand a tensile force of 350N without breaking. What minimum diameter (in mm) must the wire have
An object's moment of inertia is 2.00kgm2 . Its angular velocity is increasing at the rate of 3.80, What is the total torque on the object
A styrofoam cooler (K = .030 W/mo C) has an average surface area of 0.576 m2 and an average thickness of 2.6 cm. How much heat is required to melt the ice in the cooler
Suppose light with wavelength 7.80 102 nm is used instead and the diffraction grating has 3.35 103 lines per centimeter. Find the angles of all principal maxima
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