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A dynamite blast at a quarry launches a rock straight upward, and 2.4 second later it is raising at a rate of 12 m/s. Suppose air resistance has no effect on the rock, evaluate its speed
(a) at launch and
(b) 5.8 second after launch.
q1. two 75.0 w 120 rm v light bulbs are wired in series then the combination is connected to a 230 v supply. how much
A circuit consists of an ideal ac generator, a 25 µF capacitor, and an 90? resistor, all connected in series. Find the average power supplied by the generator
A 10-kg bullet is fired horizontally into a 300-g wooden block initially at res on a horizontal surface and become embedded in it. The coefficient of friction between block and surface is (0.50).
assuming dissipative forces can be ignored how fast will an empty barrel with a radius of 57 cm be moving after
a charged particle of mass 0.0020 kg is subjected to a 6.0 t magnetic field which acts at a right angle to its motion.
Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.5 cm-3, and their speed is 657 km/s. Find the current density of these protons
What is the distance (in mm) separating the violet (lambda = 400nm) in the first-order band from the red (lambda = 600nm) in the second order.
Tritium ({}_1^3 {\rm{{\rm H})}} is an unstable isotope of hydrogen; its mass, including one electron, is 3.016049 {\rm u}. Determine the total kinetic energy of beta decay products
a large crate of mass 1.5103kg is at rest at the top of an incline of slope 15 degrees. it slides 20 m down the
An observer, whose eyes are 1.77 m above the ground, is standing 28.0 m away from a tree. The ground is level, and the tree is growing perpendicular to it. The observer's line of sight with treetop makes an angle of 22.0° above the horizontal. How..
You hold a spherical salad bowl 90 in front of your face with the bottom of the bowl facing you. The salad bowl is made of polished metal with the 30 radius of curvature. Where is the image of your 2.0 tall noses located.
A sealed cubical container 11.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 24.0°C
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