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water has a mass per mole of 18.0 g/mol, and each water molecule (H20) has 10 electrons. How many electrons are there in 2.24 liters of water and what is the net charge of all these electrons?
A U-shaped tube open to the air at both ends contains some mercury with a density of 13,600 kg/m3. Calculate the gauge pressure at the water-mercury interface
A block whose weight is 41.0 N rests on a horizontal table. A horizontal force of 36 N is applied to the block, what will be the block's acceleration? (If not, enter 0.)
Find the final velocity of the two balls if the ball with velocity v2i = -21.2 cm/s has a mass equal to half that of the ball with initial velocity v1i = +27.6 cm/s
A 180g block hangs from a spring with spring constant 13N/m . At t=0s the block is 13cm below the equilibrium point, What is the block's oscillation frequency
When the switch was first closed to charge the capacitor, what was the effective resistance of the capacitor when it was fully charged
The temperature of the surface of the sun is 6000K and its radius is 696,000Km. How much energy is the sun radiating into space per second
A rotating wheel requires a time t = 4.32s to rotate 37.0 revolutions. What is the constant angular acceleration (rad/s2 of the wheel
A candle is held 6.0 cm from the surface of a reflecting ball, and its image appears three-quarters of its actual size. What is the diameter of the ball
Your telescope has an objective lens with a focal length of 0.80m . You point the telescope at the moon, What is the angular magnification of the moon
What is the frequency of rotationA 10kg baby is perched at the rim of a 40kg disk. The disk rotates freely in a horizontal plane at 1 rev/s. What is the frequency of rotation in rev/s when the baby arrives at the center
A charged particle moving with speed, v, enters a region containing a uniform magnetic field, Starting from Newton's second law, derive the formula for the radius of the particle's orbit in terms of its mass, m, speed, v, and the magnetic field, B
A 1500 -kg automobile travels at a speed of 75 -km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop.
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