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the highest part of a road over the top of a hill follows an arc of a vertical circle of radius 500 m with what minimum
stan and ollie are standing next to a train track stan puts his ear to the steel track to hear the train coming he
a cord of length 13 m is fixed at both ends its mass per unit length is 11 gm and the tension is 11 n a what is the
a golf ball of mass 0050 kg is at rest on the tee and has a velocity of 102 ms immediately after being struck if the
when responding to sound the human eardrum vibrates about its equilibrium position suppose an eardrum is vibrating with
a hunter is standing on flat ground between two vertical cliffs that are directly opposite one another he is closer to
when the power is turned off on a turntable spinning at 900 rpm you find that it takes 118 revolutions for it to stop
magnus has reached the finals of a strength competition in the first round he has to pull a city bus as far as he can
the outfielder throws a baseball with an initial speed of 10 ms an infielder catches the ball at the level 1 m lower
a comet orbits the sun with a period of 9681 years the comets distance of closest approach to the sun perihelion is
an asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 115 km and with a
a uniform disk with a mass of 0767kg and radius 151cm is rotating on frictionless bearings with an angular speed of
an engine with an output of 2670 w has an efficiency of 390 it works at 900 cycless how much work is done in each
1 give at least 3 examples from the electromagnetic spectrum uses and dangers2 describe the three ways that electricity
a 210 g block is pressed against a spring of force constant 130 knm until the block compresses the spring 100 cm the
soft drinks are commonly sold in aluminum containersa to an order of magnitude how many such containers are thrown away
a coil of wire is connected to a galvanometer when a bar magnet is moved in and out of the coil the galvanometer
an iron nail is brought near a magnet which of these is not true the nail is ferromagnetic the nail becomes a north
a playground ride consits of a disk of mass m 47kg and radius r 16 m mounted on a low friction axle a child of mass m
an open plastic soda bottle with an opening diameter of 30 cm is placed on a table a uniform 195-t magnetic field
three moles of ideal gas are in a rigid cubical box with sides of length 0470m part a what is the force that the gas
animals in cold climates often depend on two layers of insulation a layer of body fat of thermal conductivity 0200wm
two rods one made of brass and the other made of copper are joined end to end the length of the brass section is 0290m
a hydraulic press has one piston of diameter 20 cm and the other piston of diameter 80 cm what force must be applied to