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1 how many rulings should a 40cm wide diffraction grating have to resolve the wavelengths 415496 nm and 415487 nm in
two boys on ice skates stand face to face and then push each other away their masses are 50 kilogram and 60 kilogram
a geode is a hallow rock with a solid shell and an air filled interior assume a particular geode weighs twice as much
a hydrogen atom in a state having a binding energy the energy required to remove an electron of 085 ev makes a
80-m aluminum bar is held with its length parallel to the east-west direction and dropped from a bridge now before the
assume a beam of 50 ev protons strikes a potential energy barrier of height 60 ev and thickness 056 nanometer at a rate
a bat emits a sound whose frequency is 80 khz the speed of sound in air at 200degc is 343 ms however the air
a gaussian surface in the shape of a right circular cylinder by end caps has a radius of 102 cm and a length of 120 cm
a 75 cm diameter horizontal pipe gradually narrows to 45 cm when water flows during this pipe at a certain rate the
when an earthquake occurs two types of sound waves are generated and travel through the earth the primary or p wave has
a hunter is standing on flat ground between two vertical cliffs that are directly opposite one another he is closer to
a merry-go-round is stationary a dog is running on the ground just outside its circumference moving with a constant
an electric field of 670times105 vm is desired between two parallel plates each of area 400 cm2 and separated by 0410
a 30 gram particle undergoes shm with amplitude of 20 mm and a maximum acceleration of magnitude20 multiplied by103 ms2
the reason of a banked curve is to allow vehicles tomaneuver during the turn without relying on static tire friction to
at a coal-burning power plant a steam turbine is operated with a power output of 607 mw the thermal efficiency of the
under the action of a certain torque a body of moment of inertia i4kgm2 rotates about a fixed axis assume that at an
a 75 kilogram man sits on a 37 kg chair each leg of the chair makes contact with the floor in a circle that is 13
a car going 110 kmh southwest reaches a curve in the road suppose that the curve is an arc of a circle after rounding
a 500 kilogram small bullet is fired horizontally into a 120-kilogram wooden block resting on a horizontal surface the
if a soldier shoots an enemy with the intent of killing him he wants the bullet to deliver maximum energy on the other
during each cycle a reversible engine absorbs 1550 joule of heat from a high temperature reservoir and performs 1200
1 if a ball is attached to a string and is spun in a vertical circular motion of constant velocity at which point in
a for a satellite to be in a circular orbit 810 kilometer above the surface of the earth determine what orbital speed
a brick is originally 772 cm high and an aluminum can is initially 773 cm high by how much should their temperatures be