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1. A cylindrical copper rod of length 1.2 m and cross-sectional area 4.8 cm2 is insulated to prevent heat loss through its surface. The ends are maintained at a temperature difference of 100 Co by having one end in a water-ice mixture and the other in boiling water and steam.
a. Find the rate at which heat is transferred along the rod.
b. Find the rate at which ice melts at one end.
A particular guitar string is supposed to vibrate at 200Hz, but it is measured to actually vibrate at 209Hz. By what percent should the tension in the string be changed to get frequency to the correct value.
What is an angular acceleration
There is a uniform electric field on both sides of a large plane. Its magnitude is 80 N/C and its direction is toward the plane, on each side of it
An astronaut on a small planet wishes to measure the local value of g by timing pulses travelling down a wire which has a large object suspended from it. Imagine the wire of mass 3.80 g is 1.60 m long and has a 3.00-kg object suspended from it. A pul..
Two charges q1 = 1.1 10-8 C and q2 = -4.8q1 are placed 50 cm apart. Find the point along the straight line passing by the two charges at which the electric field is zero, as measured from q1.
The function y(x, t) = (25.0 cm) cos(?x - 20?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant when that point has the displacement y = +22.0 cm?
Find out the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
A pump, submerged at the bottom of a well that is 35m deep, is used to pump water uphill to a house that is 50m above the top of the well, as shown above. The density of the water is 1000 kg/m3. All pressures are gauge pressures. Top of well pipe to ..
A series RLC circuit with L = 15 mH, C = 3.1 F, and R = 4.7 is driven by a generator with a maximum emf of 120 V and a variable angular frequency 8700. Find out phase angle (in degrees).
An arrow is launched vertically upward from a crossbow at 97.9 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneou..
During the same interval, a 34 kg greyhound can accelerate from rest to 23 m/s. Calculate (a) the change in kinetic energy and (b) the average power output for each.
A 79.2 kg airplane pilot pulls out of a dive by following, at a constant speed of 191 km/h, the arc of a circle whose radius is 321m.
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