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Calculate the masses of the two stars in the system (watch your units, keep star masses in Msun units, put P into years and A into AU. OR use the full equation of Newton's version of Kepler's 3rd l
Match each of the following properties of a body in circular orbit to its dependence upon the radius of the orbit: (a) velocity, (b) kinetic energy, (c) period, and (d) angular momentum.
May someone answer this word problem: From the Period-Luminosity relation for Cepheid variable stars, you deduce that the luminosity of a particular star is 50 times the luminosity of an RR Lyrae st
A certain material is kept at very low temperature. It is observed that when photons with energies between 0.22 eV and 0.72 eV strike the material, only photons of 0.33 eV and 0.61 eV are absorbed.
What are the dimensions of the box as measured by an observer moving with a speed of 0.82 c parallel to one of the edges of the box?
A pendulum consists of a uniform circular disk of radius r which is free to turn about a horizontal axis perpendicular to its plane. Find the position of the axis for which the periodic time is a m
If a satellite is in a sufficiently low orbit, it will encounter air drag from the earth's atmosphere. Since air drag does negative work (the force of air drag is directed opposite the motion), the
A 5.0-liter gas tank holds 1.4 moles of helium (He) and 0.70 moles of oxygen (O2), at a temperature of 260 K. The atomic masses of helium and oxygen are 4.0 g/mol and 16.0 g/mol, respectively. Avog
Suppose you measure a standing person's blood pressure by placing the cuff on his leg 0.540 m below the heart. Calculate the pressures you would observe if the pressures at the heart are 121 over 8
A spring oscillator is designed with a mass of 0.273 kg. It operates while immersed in a damping fluid, selected so that the oscillation amplitude will decrease to 1.00% of its initial value in 5.6
What is the difference between Scatter charts (such as the ones we used in the lecture) and Pie charts? Calculate the average speed of a car that takes 100 seconds to travel a distance of 800 m.
While you are sitting on a chair at the edge of a 1.2-m. deep swimming pool, your eyes are 1.7 m. above the surface of the water. You see an acorn on the bottom of the pool at a 45° angle below the
A person is 1.7 m tall. Where should he place the top of a mirror on the wall so he can see the top of his head? Assume his eyes are 4.6 cm below the top of his head. Find a minimal vertical distan
The raduis (r) and thickness (h) of a circular disk are measured to be 24+0.2 or 24-0.2 cm and 1+0.05 or 1-0.05 cm, respectively. Calculate the volume of the disk and its absolute uncertainty
What is the magnitude of the electric field 26.7cm directly above an isolated 3.46×10-5C charge
Two forces FA and FB are applied to an object whose mass is 9.53 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 1.43 m/s2. However, when F
A two-slit pattern is viewed on a screen 0.950 m from the slits. If the two third-order minima are 20.0 cm apart, what is the width of the central bright fringe? (This is the distance between the n
The plant Jupiter I more than 300 times as massive as earth, so it might seem that a body on the surface of Jupiter would weigh 300 times as much as it would weigh on earth. But it so happens that
An inductor is connected to the terminals of a battery that has an emf of 12.0V and negligible internal resistance. The current is 4.86mA at 0.725 ms after the connections is completed. After a lon
What are the components of the electric field strength in the reference frame of a rocket traveling in the positive x-direction at 6.0×105m/s ?
Jan and Len throw identical rocks off a tall building at the same time. The ground near the building is flat. Jan throws her rock straight downward. Len throws his rock downward and outward such tha
A negligible amount of this energy goes to the resulting 5726Fe atom as kinetic energy. About 90 percent of the time, after the electron-capture process, the 5726Fe nucleus emits two successive gamm
If you treat an electron as a classical spherical object with radius 1.90×10-17m , what angular speed ω is necessary to produce a spin angular momentum of magnitude 3/4---√?? Use h
Using the Einstein model of a solid, calculate and plot ln(OMEGA)1 vs.Q1 (the number of quanta in object1), ln2 vs. Q1, and ln(OMEGA)total vs. Q1 (put all three plots on the same graph). Show your w
A 150-g block on the end of a spring with a spring constant of 35 N/m is pulled aside 25 cm and released from rest. In the electrical analog the maximum charge on the capaciteris 0.25 C.The maximum