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a circular wine barrel 75 cm in diameter will burst if the netupward force exerted on the top of the barrel is 6490 n a
an electron is accelerated through 2400v from rest and thenenters a region where there is a uniform 170 t magnetic
one heater uses 270 w of power when connected by itself to abattery another heater uses 350 w of power when connected
asquare loop of wire surrounds a solenoid the side of the square is01 m while the radius of the solenoid is 0025 m the
a man pushes a lawn mower on a level lawn with a force of 208n if 42 of this force is directed downward and 54 w of
a microwave oven has a power requirement of 1249 w a frozendinner requires 63 min to heat of full powera how much
a ray of sunlight is passing from diamond into crown glass the angle of incidence is 2890 degrees the indices of
the drawing shows a collision between two pucks on an air-hockeytable puck a has a mass of 0030 kg and is moving along
a 700 newton stunt pilot flying a 980kg plane in a vertical loopwith a radius of 600 meters is weightless at the top of
a speeder is pulling directly away and increasing his distance froma police car that is moving at 23 ms withrespect to
the averageintensity of sunlight at the top of the earths atmosphere is 1390wm2 what is the maximum energy that a 25 m
a thin film of polystyrene is used as an antireflectivecoating for fabulite known as the substrate the index
the radius of curvature of a loop-the-loop for a rollercoaster is 106 m at the top of the loopthe force that the seat
exciting news a planet has been discovered orbiting the star closest to us on earthnbsp under careful observation the
1 two charges 10c and 20c are 30cm parta what is the electric force felt by the first chargeb what is the electric
an 870 kg block slides with an inital speed of 156 ms down the ramp at an angle of 284 with the horizontal the
a certain type of laser emits light that has a frequency of 74x 1014 hz the light however occurs as a series ofshort
1 in a series circuit how do the currents flowing through individual resistors compare2 in a series circuit how does
a 60 omega rtesistor and a 40 omega are connected inparallel to a 120 v power supplya what is the current through each
two diverging light rays originating from the same point havean angle of 810deg between them after the rays reflect
a 140 kg block slides with a speed of 0950 ms on a frictionless horizontal surface until it encounters a spring with a
a rubber ball of mass 265 g is dropped from a height of 190 m onto a floor the velocity of the ball is reversed by the
a person of mass 520 kg stands at rest how much will the average force exerted on the feet by the floordiffer from the
a flat unbanked curve on a highway has a radius of240 rm m a car rounds the curve at aspeed of 200 rm mrm swhat is the
a 29kg block slides with a speed of 16ms on a frictionlesshorizontal surface until it encounters a spring a if the