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Given that the number of electrons per volume in aluminum is 3.01x10^56 electrons/m^3, determine the valence number (number of free electrons per atom), the atomic mass, and the mass density.
A basketball is thrown horizontally with an initial speed of 4.90 m/s. A straight line drawn from the release point to the landing point makes an angle ? = 27.0° with the horizontal. What was the release height
On a hot day, the temperature of an 81099-L swimming pool increases by 4 degrees celcius. What is the net heat transfer during this heating
A mirror that is spherical has a focal length of -15 cm. what type of image would it be, What is the magnification going to be
A rigid tank contains 1.40 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.2 atm to 5.90 atm. Assume the volume of the tank and the temperature of the gas re..
A crate of bananas with a mass of 50kg rest on a loading ramp that makes an angle theta = 30 degrees with the horizontal ground. What is the static friction force on the box to keep it from sliding
q1. what is the frequency of ultrasound in a medium if he wave length is 3.0 x 10-3 m and velocity is 1300 mmms?q2. an
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. What is the ball's direction of motion just before it is caught
A 5.0 V battery storing 43.0 kJ of energy supplies 1.5 A of current to a circuit. How much energy does the battery have left after powering the circuit for 1.0 hour
A photon has the same momentum as an electron moving with a speed of 1.83×105 m/s. What is the wavelength of the photon
One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on the spaceship, determine the age of the Earth-based twin brother
An arrow is fired horizontally with a speed of 68. m/s directly at the bulls eye of a target 50 m away. When fired, the arrow is 120-m above the ground. How far short of the target does it strike the ground.
The magnitude of q is chosen to make the potential difference between spheres 430 V, with the inner sphere at higher potential. Compute q.
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