True or false the light that is emitted from a semiconductor, upon external stimulation, is longer and longer in wavelength as the particle size of the semiconductor decreases.
Consider three capacitors c1, c2, and c3 and a battery. if only c1 is connected to the battery, the charge on c1 is 32.2 µc. now c1 is disconnected, discharged, and connected in series with c2. when the series combination of c2 and c1 is connected across the battery, the charge on c1 is 23.4 […]
A charge per unit length given by l(x) = bx, where b = 12 nc/m2, is distributed along the x axis from x = +9.0 cm to x = +16 cm. if the electric potential at infinity is taken to be zero, what is the electric potential at the point p on the y axis […]
The gravitational acceleration on a planet’s surface is 16.0 m/s2. what is the gravitational acceleration at an altitude of one planet diameter above the surface of the planet?
At a pressure of one atmosphere oxygen boils at −182.9°c and freezes at −218.3°c. consider a temperature scale where the boiling point of oxygen is 100.0°o and the freezing point is 0°o. determine the temperature on the oxygen scale that corresponds to the absolute zero point on the kelvin scale.
The desk has a weight of 75 lb and a center of gravity at g. determine its initial acceleration if a man pushes on it with a force f = 60 lb. the coefficient of kinetic friction at a and b is mk = 0.2.
Consult concept simulation 6.1 in preparation for this problem. a golf club strikes a 0.065-kg golf ball in order to launch it from the tee. for simplicity, assume that the average net force applied to the ball acts parallel to the ball’s motion, has a magnitude of 6170 n, and is in contact with the […]
Calculate wa, the work done by the gas as it expands along path a from v0 to va=rvv0. express wa in terms of p0, v0, and rv.
68 kg tennis ball is given an angular momentum of .00272 kgm2/s when struck by a racquet. if its radius of gyration is 2 cm, what is its angular velocity
A 129-kg astronaut (including space suit) acquires a speed of 2.30 m/s by pushing off with her legs from a 1850-kg space capsule. use the reference frame in which the capsule is at rest before the push. part a what is the velocity of the space capsule after the push in the reference frame?
