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A.) Briefly describe three ways that distances to stars can be measured.
b.) Name an object, not man made , that emits light in pulsars similar to those from a pulsar. Any wavelegnth is okay. Could we detect these pulses if they came from Jupiter? From a nearby star?
c.) Name a type of expansion (or expanding object) that does not obey Hubble's law.
A stationary motion detector sends out a sound wave of frequency f= 4.0-Hz towards an approaching car. The wave is reflected off the car and the reflected wave is picked up by the motion detector.
A grandfather's clock is calibrated at a temperature of 20 C. The pendulum is a thin brass rod with a heavy mass attached to the end. On a hot day, when the temperature is 30 C, does the clock run fast or slow? How much time does it gain or lose i..
Concept Simulation 26.4 provides the option of exploring the ray diagram that applies to this problem, Find the image distance and the object distance
A satellite of mass 190 kilogram is launched from a site on Earth's equator into an orbit at 185 kilometer above the surface of Earth. evaluate what is the orbital period of this satellite
A woman once survived a fall of over six miles without a parachute when her plane exploded. What is this distance in meters
In radiofrequency (RF) ablation, a small needle is inserted into a cancerous tumor. When radiofrequency oscillating currents are sent into the needle, ions in the neighboring tissue respond by vibrating rapidly, causing local heating to temperatur..
A curve of radius 30.0 m is banked so that a car traveling 40.0km/h can round it even if the road is so icy that the coefficient of static friction is approximately zero.
Ball A is dropped from the top of a building of height H at the same instant ball B is thrown vertically upward from the ground. First consider the situation where the balls are moving in opposite directions when the collide.
The density of copper is 8.92g/cm3, and its atomic mass is 64.0. Assuming each copper atom contributes one mobile electron to the metal, find the number density of free charges in the wire
When in deep space, the block accelerates at 4.2 m/s^2 even as a 120 N force is applied to it. The coefficient of static friction for a particular plane and this block is 0.31. What angle can this plane make with horizontal before the object starts t..
Both drawings show the same square, each of which has a side of length L = 0.82 m, Find the single smallest frequency that will produce both constructive interference in drawing 1 and destructive interference in drawing 2
An astronaut lands on an earth-like planets and drops a small lead with a mass of 76.5 g from the top of the spaceship. the point of release is 18 m above the surface of the planet and the ball takes 2.5 s to reach the ground. the astronaut's mass..
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