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2 cars 1 and 2 starting from rest are moving with speeds v1 and v2 msv1gtv2 car 2 is ahead of car1 by 3939s3939 metres when the driver of car 1 sees
used normally a 150-watt 120 volt light bulb requires how many amps of currentansused generally a 150-watt 120 volt light bulb needs 125
five volts are applied across the plates of a parallel plate capacitor the distance of separation of the plates is 02 meters what is the magnitude of
the force acting between two point charges can be computed using which of the following lawsa ohms lawb amperes lawc coulombs lawd newtons second
the potential difference across a 4 ohm resistor is 20 volts assuming that all of the energy dissipated by this resistor is in the form of heat
the constant potential difference across a 2 ohm resistor is 20 volts how many watts of power are dissipated by this resistorans200 watts of power
name the female physicist who received the nobel prize in 1963 for her discovery concerning the shell structure of the nucleus ansmaria goeppert
who first theoretically predicted the existence of the positron a positively charged electron he received the nobel prize in physics in 1933
who shared the nobel prize in physics in 1909 with guglielmo marconi for his contribution to the development of wireless telegraphyanscarl ferdinand
which of the following scientists is responsible for the exclusion principle which states that two objects may not occupy the same space at the same
what is the name of the first american physicist to win two nobel prizesansjohn bardeen was the first american physicist who win two nobel
if the resultant force acting on a body of constant mass is zero the bodys momentum isa increasingb decreasingb always zerod constantansif the
in physics a radian per second is a unit of a angular displacementb angular velocityc angular accelerationd angular momentumansa radian per second is
a machine performs 8 joules of work in 2 seconds how much power is delivered by this machineansthe power is delivered by this machine is 4
a 40 kilogram girl climbs a vertical distance of 5 meters in twenty seconds at a constant velocity how much work has the girl doneans2000 joules or
if the distance between two objects each of mass m is tripled the force of attraction between the two objects is a 12 the original forceb 13
a helicopter is ascending vertically with a constant speed of 6 meters per second relative to the ground at the instant the helicopter is 60
a certain spring is known to obey hookes law if a force of 10 newtons stretches the spring 2 meters how far will a 30 newton force stretch the
a 10 kilogram body initially moving with a velocity of 10 meters per second makes a head-on collision with a 15 kilogram body initially at rest
a block of metal which weighs 60 newtons in air and 40 newtons under water has a density in kilograms per meter cubed of a 1000b 3000c 5000d 7000ansa
a box is initially at rest on a horizontal frictionless table if a force of 10 newtons acts on the box for 3 seconds what is the momentum of the box
a boy throws a ball vertically upward with a velocity of 6 meters per second how long does it take the ball to return to the boys handansa boy throws
a certain machine exerts a force of 200 newtons on a box whose mass is 30 kilograms the machine moves the box a distance of 20 meters along a
a toy train moves in a circle of 8 meters radius with a speed of 4 meters per second what is the magnitude of the acceleration of the trainansthe
a ball leaves a girls hand with an upward velocity of 6 meters per second what is the maximum height of the ball above the girls handansa ball