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A student sits on a rotating stool holding two 3.2-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg · m2 and is assumed to be constant. The student then pulls in the objects horizontally to 0.48 m from the rotation axis. (a) Find the new angular speed of the student. 1.66J . Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s (b) Find the kinetic energy of the student before and after the objects are pulled in. before 2.31J . Your response differs from the correct answer by more than 10%. Double check your calculations. J after 5.1 J Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. J
Two protons that are very far apart are hurled straight at each other, each with an initial kinetic energy of 0.21 MeV, What is the separation of the protons from each other
A pulsed carbon dioxide laser has an energy output of 1.00 J. This energy is released in the form of a 10^9 W pulse of infrared radiation lasting 10^-9 s, Find the equivalent capacitance of the network
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. What is the refractive power of a magnifying glass that has an angular magnification of 7.5
The carts of a roller coaster are traveling 2 m/s over the top of the first hill. what speed will the carts have at the bottom of the hill
An electron is observed moving 50 percent of the speed of light, v = 1.5 *10^8m/s. What is the relativistic mass of the electrong
A ball of mass 0.275kg that is moving with a speed of 5.1m/s collides head-on and elastically with another ball initially at rest. Calculate the velocity of the target ball after the collision
The pilot of an airplane travelling 200 km/h wants to drop supplies to flood victims isolated on a patch of land 165m below. The supplies should be dropped how various seconds before plane is directly overhead.
An analysis of each gas and their mole percent from the analysis of a flue gas is given below: Determine the average molecular weight of the flue gas.
A 13 cm long animal tendon was found to stretch 3.6 mm by a force of 13.2 N. Calculate the elastic modulus of this tendon
A large fraction of the ultraviolet (UV) radiation coming from the sun is absorbed by the atmosphere. The main UV absorber in our atmosphere is ozone, O 3 rm O_3. In particular, ozone absorbs radiation with frequencies around 9.38×1014Hz rm Hz..
An FM transmitter delivers 30 KW into a 50 ohm antenna. Calculate the modulation index, the sensitivity of the transmitter's modulator and write the equation of the FM signal
If a 12 V battery is used to charge this capacitor, what is the total charge stored what is the magnitude of the electric field between the plates what is the energy stored on the capacitor
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