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jill 60kg is swinging on a rope swing that is 4m long at what frequency does jill need to pump her legs to get the
a rock is suspended from a scale reads 200 n a beaker of water having a density of 1000 kgm3 is raised up so the rock
a piano string with mass density 7700 kgm3 and diameter 03 mm is stretched over a pulley such that its vibrating length
what did newton discover about gravity 1 all objects near the earth free fall with the same acceleration 2 any force on
a ladder leans against a wall making a 550deg angle to the floor the ladder is 450 m long and weighs 415 n the wall is
one kilogram of dry air at stp conditions is exposed to 100 r of x-rays one roentgen is defined by equation 321 in
a laser produces a 650-mw beam of light consisting of photons with a wavelength of 6219 nm a how many photons are
how man protonsneutrons and electrons are there in the neutral atom of the isotope of silver named
simple pendulum with length 1m released from rest from angle of 20 degrees from the vertical and to the left of the
calculate the vapor pressure of water above a solution prepared by dissolving 350 g of glycerin c3h8o3 in 140 g of
a rectangular block of copper has sides of length 10 cm 20 cm and 40 cm if the block is connected to a 60-v source
exactly 7500ml of a solution that contained 4804ppm of bano32 were mixed with 2000ml of a solution that was 003090 m in
if your boat weighs 1200n how much water will it displace when it is floating motionless at the surface of a
water is flowing in a horizontal pipe 1 inch schedule 40 with a velocity of 2 fts and a pressure of 10 psia the water
a collision between two protons produces three new particles p p ---gtp 0 0 the rest energies of the new particles
a 300 pound man is submerged in water and his submerged weight is approximately 120 pounds what is the volume of this
what is the relationship between energy and the wavelength of an electromagnetic
suppose you have a spherical balloon filled with air at room temperature and 10 atm pressure its radius is 10 cm you
the reaction rate for the prepupal development of male drosophila is temperature-dependent assuming that the reaction
incandescent white of a fireworks display is caused by the formation of p4o10 which occurs by the combustion of
what is the maximum amount of energy that is stored in a volcano if the chamber is 55x104 meters wide 72x104 meters
the purity of gold alloys is expressed in karats which is the mass fraction of gold multiplied by 24 pure gold is 24 kt
a mass m is split into two parts m and m - m which are then separated by a certain distance what ratio mm gives the
a tank having a volume of 011 m3 contains helium gas at 170 atm how many balloons can the tank completely fill if each
an ac generator with a frequency of 294 hz and an rms voltage of 120 v is connected to a 495-microf capacitor a what is