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A runner weighs 635 N (about 140 lb), and 72% of this weight is water.
(a) How many moles of water are in the runner's body? moles
(b) How many water molecules (H2O) are there? molecules
Two trains approach each other on parallel tracks. how long (in seconds) will it be before they pass each other
A child in a boat throws a 5.15-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest
A closed gas system initially has volume and temperature of 4360mL and 646.0C with the pressure unknown. what was the initial pressure in torr
Two equal point charges of magnitude 4.0 ?C are situated along the x-axis at x1 = -2.0 m, compute the electric potential energy of this system of charges?
To stretch a certain spring by 2.50cm from its equilibrium position requires 9.00J of work, What was the maximum force required to stretch it by that distance
q1. a 1035 kg car carrying four 78 kg people travels over a rough washboard dirt road with corrugations 5.0 m apart
A total charge of 7.40 x 10^ -6C is distributed on two different small metal spheres. How much charge is on each sphere
A neutron star is an extremely dense, rapidly spinning object that results from the collapse of a star at the end of its life. What is its rotational inertia
A concert loudspeaker suspended high off the ground emits 42 W of sound power. A small microphone with a 1.0 cm2 area is 43 m from the speaker. (a) What is the sound intensity at the position of the microphone
A proton accelerates from rest through 1500 volts. the proton then enters a region of space where the magnetic field is 0.3 tesla (and this field is perpendicular to the velocity). calculate the radius of the resulting circular motion?
When a carpenter shuts off his circular saw, the 10.0 inch diameter blade slows from 4250 rpm to 0.00 in 1.00 s. What is the distance traveled by a point on the rim of the blade during the deceleration
Runner A is at first 5.4 km west of a flagpole and is running with a constant velocity of 2.6 km/h due east. Runner B is initially 3.0 km east of the flagpole and is running with the constant velocity of 8.8 km/h due west. What would be the distance ..
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