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A brass plug is to be placed in a ring made of iron. At 20°C, the diameter of the plug is 8.757 cm and that of the inside of the ring is 8.747 cm.
(a) They must both be brought to what common temperature in order to fit?
______°C
(b) Repeat part (a) if the plug were iron and the ring brass.
_______°C
The total electric flux from a cubical box 40.0cm on a side is 2280 Nm^(2)/C. What charge is enclosed by the box?
an ambulance with a siren emitting a whine at 1600 hz overtakes and passes a cyclist pedaling a bike at 2.44 ms. after
Two 9cm diameter charged disks face each other, 25cm apart. Both disks are charged to - 80 nC.
A 1540.0 g mass is ona horizontal surface with μk = 0.31, and isin contact with a massless spring with a force constant of 787.0N/m which is compressed. When the spring is released, it does 2.52J of work on the mass while returning to its equilibr..
A beam of light in air strikes the surface of a smooth piece of plastic having an index of refraction of 1.55 at an angle with the normal of 20°. The incident light has component E-field amplitudes parallel and perpendicular to the plane of incidence..
A planet has two moons. The first moon has an orbital period of 1.262 Earth days and an orbital radius of 2.346*10 4 km. The second moon has an orbital radius of 9.378*10 3 km. What is the orbital period of the second moon? Show all work.
A model rocket launches with an initial velocity of 6 m/s, at an angle of 88 degrees (with respect to the horizon). What is the maximum height attained by the rocket
An electron is accelerated by a uniform electric field (1600V/m ) pointing vertically upward. Determine the direction of electron's velocity after it moves 0.40cm from rest
A 24.0 kg child plays on a swing having support ropes that are 2.20 m long. How fast will she be moving at the bottom of the swing
(a) The speeds vC and vD, (b) The fraction of the initial kinetic energy of the system which is dissipated during thecollision.
A disk of radius R and uniform surface charge density σ liesin the xy plane with its axis coinciding with the z axis. Itrotates about its axis with angular velocity ω . Find Bat position z on the z axis. Evaluate for R = z = 5cm, σ= 2μc/m2 at 7200rpm..
predict how to changing the variables may effect the distance traveled or the speed of the race car.
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