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A wire carries a current of 30 A along the x-axis from x = 0 to x = +3.0 cm. Determine the magnitude of the magnetic field at the point y = 4.0 cm on the y axis.
The area of a typical eardrum is about 5.0 × 10?5 m2. Calculate the sound power incident on an eardrum at the threshold of pain
A cylinder with a diameter of 9 microns and a height of 40 microns is composed of Al2O3. Calculate the number of aluminum atoms and the number of oxygen atoms
A 107-kg horizontal platform is a uniform disk of radius 1.85 m and can rotate about the vertical axis through its center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis
You are standing on the edge of a turntable with frictionless bearings. It is initially rotating when you catch a ball, which ismoving in the same direction but faster than you are moving and ona line tangent to the edge of the turntable.
Assuming Bohr model of atom. The electron in hydrogen atom orbits nucleus at distance of 0.029 nm. Mass of nucleus is 1.67 x 10 ^-27 kg. Determine the period of the electron
A high school kicker makes a 34.0yd field goal attempt (in American football) and hits the crossbar at a height of 12.0ft. What is the magnitude of the net displacement of the football from the time it leaves the ground until it hits the crossbar? Wh..
In a simple model of the hydrogen atom, the electron moves in a circular orbit of radius 0.053 nm around a stationary proton. How many revolutions per second does the electron make
the earth circumference is 4*10(7) m. and the mooncircumference is 27% as large. the moon mass is 1.23% of the earthmass. calculate escape velocity on the moon
q1. suppose we had a rubber ball like the ones used for racquetball and put it inside a container with liquid nitrogen.
Two charges, +4.0x 10-8C and -2.0 x 10-8C are separated by 12 cm. Calculate the net force on the third charge
How far did you travel on this trip? What was your average speed.
The displacement of a wave traveling in the positive x-direction is D(x,t)=(3.5cm)sin(2.7x?122t), where xis in m and t is in s. What is the frequency of this wave
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