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questiona the proton-proton chain efficiently converts hydrogen into helium according to 4h rarr4 he a helium 4 nucleus weighs 664638 times 10-27 kg
question1a 67 human sprinters can accelerate from rest to 11 in 30 throughout the similar interval a 32 greyhound can accelerate from rest to 22
question1a simple pendulum consists of an object suspended by a string the object is supposed to be a particle the string with its top end fixed has
question1a 350 piano slides 34 down a 34 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline the
question1consider a radius10cm circular nondiverging pencil beam of 3x108 photons one-third with an energy of 1 mev remaining two-thirds with an
question1a uniform bar is propped against an extremely slick vertical wall the force of static friction between upper end of the bar and the wall is
question1a uniform bar of length 46 m and mass 3 kg is attached to a wall with a hinge that exerts a horizontal force hx and a vertical force hy on
question1a horizontal 800-n merry-go-round of radius 120 m is started from rest by a constant horizontal force of 45 n applied tangentially to
question1a child slides down a slide with a 31 degree incline and at the bottom her speed is precisely one-third what it will have been if the slide
question1the pilot of a plane measures an air velocity of 186 kmh south an observer on ground sees the plane pass overhead at a velocity of 102 kmh
question1a person eats a dessert that contains 210 calories this calorie unit with a capital c is the one used by nutritionists 1 calorie 4186 j the
question1a 408 kg mass is brought close to a second mass of 110 kg on a frictional surface with coefficient of friction 12at what distance will the
question1consider an element of air in the standard atmosphere at a standard altitude of 1000 m imagine that you somehow raise this element of air is
question1one 29 kg paint bucket is hanging by a massless cord from another 29 kg paint bucket also hanging by a massless corda if buckets are at rest
question1an atomic nucleus of mass 230 u moving at 400 ms emits an alpha particle of mass 40 u in direction of its velocity if the remaining nucleus
question1a 20g rifle bullet travelling 230 ms buries itself in a 39 kg pendulum hanging on a 27 m long string that makes the pendulum swing upward in
questionaif puck has a radius of 2 cm what is the ratio of angular to linear velocity for which kinetic energy of linear motion equals that of
question1a 115kg mail bag hangs by a vertical rope 40 long a postal worker then displaces bag to a position 22m sideways from its original position
question1a 32 percent efficient electric power plant generates 700mw of electric power and discharges waste heat into 20c ocean water assume the
question1a piece of aluminium specific heat 0910 kjkg 0c of mass 138 g at 74 0 c is dropped into a styrofoam cup filled with 159 ml water at 20 0 c
question1two gerbils run in place with a linear speed of 060 on an exercise wheel that is twisted like a hoop find out an angular momentum of the
question1a 575g air-track glider attached to a spring with spring constant 140 nm is sitting at rest on a frictionless air track a 225 g glider is
question1the diameter of the large piston of a hydraulic press is 20 cm and the area of the small piston is 050 cm2 if a force of 400n is applied to
question1a space platform in form of a thin circular disc of radius a and mass m flying saucer is initially rotating steadily with angular velocity
question1a professors office door is 092 rm m wide 20 rm m high 40 rm cm broad has a mass of 25 rm kg and pivots on frictionless hinges a door closer