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a wagon is rolling forward on level ground friction is negligible the person sitting in the wagon is holding a rock the
a transverse wave is traveling with a speed of 300 ms on a horizontal string if the tension in the string is increased
determine how many hours are required for the earth to rotate through 1radian in 1 second of time through how many
a projectile is launched from the ground at t0 with an initial launch speed of v0 ms at and angle of degree above the
a dry cell when short-circuited will furnish about 30 amp for a brief time if its emf is 15 v calculate what is its
what is the pressure change in water going from a 38- cm-diameter pipe to a 23- cm-diameter pipe if the velocity in the
a solid sphere has a temperature of 923 k the sphere is melted down and recast into a cube that has the similar
a cell of emf 30 volts and internal resistance of 001 omega is connected through an ammeter of 005 omega internal
a 2 kg block is initially at the bottom of a 30 incline with a speed of 12ms going up the incline the coefficient of
a piece of styrofoam is completely submerged under water rho 1000 kgm3 it is held under because it is attached to a
a bar is 20 centimeter thick and 30 centimeter wide the bar has a uniform density in width and thickness but has a mass
a car parked in the sun absorbs energy at a rate of 590 watts per square meter of surface area the car reaches a
in a large centrifuge used for training pilots and astronauts a small chamber is fixed at the end of a rigid arm that
an initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not
a spider hangs from a strand of silk whose radius is36x10-6 m the density of the silk is 1500kgm3 when the spider moves
to decide the location of her center of mass a physics student lies on a lightweight plank supported by two scales250
de broglie postulated that the relationship lambda hp is valid for relativistic particles determine the de broglie
a father clock is controlled by a swinging brass pendulum that is 11 meter long at a temperature of 23degcdetermine the
an l-r-c series circuit has a resistance of 147 omega an inductance of 0780 h and a capacitance of 140times10-2 microf
a narrow but solid spool of thread has a radius r and mass m if you pull up on the thread therefore that the center of
the sound intensity level at a rock concert is 114 db while that at a jazz fest is 845 db find the ratio of the sound
a bat emits a sound whose frequency is 726 khz the speed of sound in air at 200 oc is 343 ms however the air
a photon has a wavelength lambda and an energy e before scattering from a free electron after scattering through a
a man stands between a vertical mirror 080 meter tall and a distant tree whose height is h he is 285 meter from the