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An old professor uses a converging lens with focal length 28 cm to view a coin 16 cm in front of the lens.
(a) Where is the image located?
(b) What is the magnification?
One can not align the apparatus to eliminate entirely the effects of the Earth's magnetic field. calculate the component of the earth magnetic field perpendicular to the entering electron beam
The Youngs Modulus for copper is 130 Gpa. What is the strain in the the copper wire under a stress of 120Mpa
An electron has a spin magnetic moment of magnitude ? = 9.285·10–24 A m2. Consequently, it has energy associated with its orientation in a magnetic field.
A constant force of 50 N is applied tangentially to the rim of a solid disc with a 60 cm radius. The wheel has a moment of inertia of 40 kgm^2. What is the mass of the disc
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 16.1 s. The acceleration of gravity is 9.8 m/s2 .
Ocean waves are traveling to the east at 4.1 m/s with a distance of 18 m between crests. With what frequency do the waves hit the front of a boat when the boat is at anchor
The number of electrons in a copper penny is approximately 10*10^23, How large would the force be on an object if it carried this charge and were repelled by an equal charge one meter away?
The two stars in a binary star system have masses 2.3x1030kg and 5.5x1030kg. They are separated by 1.5x1012m. What is the speed of the lightest star
two stars with masses m1 and m2 that are initially very far apart and at rest and even farther from any other stars are
The electric motor of a model train accelerates the train from rest to 0.820 m/s in 18.5 ms. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration
A steel rod with a length of l = 1.55 m and a cross section of A = 4.84 cm2 is held fixed at the end points of the rod. What is the size of the force developing inside the steel rod
A stretched string fixed at each end has a mass of 50 g and a length of 7.2 m. The tension in the string is 47 N. What is the vibration frequency for this harmonic?
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