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Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons.
(a) How many electrons are there in 8.94 liters of water? (1 liter is equivalent to 1.00 x 10-3 m3)
(b) What is the net charge of all these electrons?
A student pushes a loaded sled whose mass m is 240kg for a distance d of 2.3m over the frictionless surface of a forzen lake. if the sled starts from rest, what is its final velocity
A pendulum clock can be approximated as a simple pendulum of length 1.08 m and keeps accurate time at a location where g = 9.82 m/s2. what must be the new length of the pendulum
A ranger in a national park is driving at 24.0 mi/h when a deer jumps into the road 270 ft ahead of the vehicle. After a reaction time of t, ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the greatest reaction tim..
A tuning fork vibrating at 666 Hz falls from rest and accelerates at 9.8 m/s 2. How far below point of release is the tuning fork when waves of frequency 626.4 Hz reach the release point? The speed of sound in air is 339 m/s.
A horizontal mass-spring system is in SHM. The mass is 0.25kg, the spring constant is 12N/m, and the amplitude is 15cm, What is the maximum speed of the mass and where does it occur
A woman with mass 50 kg stands at the rim of a large disk rotating at 0.5 rev/s about its center axis. What is the difference in energy of the system
A small, square loop carries a 38 Amp current. The on-axis magnetic field strength 48cm from the loop is 7.1 nT. What is the edge length of the square
In a slow-pitch softball game, a 0.200 kg softball crossed the plate at 18.00 m/s at an angle of 45.0° below the horizontal. Determine the impulse delivered to the ball
A diverging lens with f= -26.0 cm is placed 11.0 cm behind a converging lens with f= 20.0 cm. Where will an object at infinity be focused
A child of mass m rides on a Ferris wheel . The child moves in a vertical circle of radius13.8 m at a constant speed of 3.30 m/s. Calculate the magnitude of the force on the child
An 8.70-kg block slides with an initial speed of 1.80 m/s down a ramp inclined at an angle of 22.2 deg with the horizontal. Use energy conservation to find the distance the block slides before coming to rest
A golfer tees off from the top of a rise, giving the golf ball an initial velocity of 43 m/s at an angle of 30o above the horizontal. How high is the rise above the fairway
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