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Kinetic energy is a microscopic concept. The equivalent cacroscopic concept is:a. mass b. entropy c. temp d. heat
The second law of thermodynamics has a number of equivalent definitions, all of which give an indication of which way nature flows. which of these statements is not generally derivable from the concept that that a particular engine is the most efficient engine possible and that it is reversible?a. heat will not flow spontaneously from a cold reservoir to hot oneb. an engine or combination of engines alone cannot make theat flow from a cold reservoir to a hot one.c. heat will flow spontaneoulsy from a cold reseroir to hot oned. it is not possible to convert 100 % of heat into work.
Two point charges .03 m apart have an electric potential energy -90 microjoules . The total charge is 20 nanoCoulombs. What is the lesser charge
A 52.1-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.589 and 0.312, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across ..
consider the case of a wooden block moving along a horizontal track, how much is the change in mechanical energy
The frequency of a tuning fork is 358 Hz. Find the length of the shortest organ pipe which will give 6 beats/s with the fork. The velocity of sound in air is 339.1 m/s.
Calculate the de Broglie wavelength for an alpha particle (He-e nucleus) with energy E = 4.2 GeV (which is emitted in the radioactive decay of U-238)
A 53.26 g sample of a substance is initially at 29.9 °C. After absorbing 2429 J of heat, what is the specific heat of the substance
what is the net workdone on the weights.A child slides down a hill on a toboggan with an acceleration of 1.8 m/s2. If she starts at rest, how far has she traveled after following lengths of time.
A 125-turn circular coil of radius 2.75 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Find the magnitude of the average EMF
A baton consists of a 10-cm rod of mass 200 g with small metal spheres, each of mass 100 g, on either end. Calculate the moment of inertia of the baton about an axis through the center of the rod and perpendicular to it
Length A is measured to be 7.5cm±0.3 cm and length B is 7.0cm±0.6cm. What is the difference between the two lengths, LB - LA
A uniform 2.95- kg spinning disk with a radius of 0.263 m is brought to rest by a brake-pad pressed against the side 0.205 m from the rotation axis. What frictional force was applied by the brake pad
m1 = 26.00 kg, m2 = 13.10 kg, R = 0.12 m, and the mass of the uniform pulley M = 5.00 kg. Calculate the time interval required for m1 to hit the floor
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