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A toaster rated at 1040 Woperates on a 120 V household circuit and a 4.00 m length of nichrome wire as its heating element. The operating temperature ofthis element is 314°C. What is the cross-sectional area of the wire?
m2
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. The small wheel has a radius of 2.8and accelerates at the rate of 6.3 , and it is in contact with the pottery wheel (radius 28.0 ..
question1a dolphin located in sea water at a temperature of 21?c emits a sound directed toward the bottom of ocean 148
A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. What is the altitude of the projectile at this instant
Two horizontal curves on a bobsled run at the similar angle, but one has twice the radius of the other. The safe speed (no friction needed to stay on the run) for the smaller radius to curve is v. What is the safe speed on the larger radius curve.
Iodine-131 has a half-life of 8 days while iodine-125 has a half life of 60 days and are both used therapeutically for different purposes. what percentage of the iodine-125 has decayed
You launch a rock from the origin (0,0) with an initial speed of 50 m/s at an angle of ?o=30° from horizontal. How far horizontally will the rock travel before it lands
A charge of -330e is uniformly spread through thevolume of a sphere of radius 1.95 cm. What is the volume charge density in that sphere
Suppose a bullet of mass m = 6.77g is fired into a ballistic pendulum whose bob has a mass of M = 0.693kg. What was the speed of the bullet-bob combination immediately after the collision takes place
The resonant frequency of an RCL circuit is 1.0 kHz, and the value of the inductance is 7.0 mH. What is the resonant frequency
Two parallel plates of area 51 cm.^2 have equal but opposite charges of 4.10E-07 C. Find the dielectric constant of the material
A 1000 kg rocket carrying 4000kg of fuel is travelling at 200 x m/s It burns and ejects 100kg of exhaust with a relative velocity of ?400x m/s , What is the final velocity of the rocket after this
An electron travels north at a speed of 6.0x10^4 m/s through a uniform magnetic field that is directed upwards and whose magnitude is 1.8x10^-3 T. determine the direction of the magnetic force
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