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How are meteors categorized? What are the two main categories, and what subdivisions exist within them?
Problem 1. Bob is watching Anna ?y by in her high-speed plane, which Anna knows to be 70 m in length. As a greeting, Anna turns on two lights simultaneously
Explain why the absorption lines of an element have the same wavelengths as the emission lines of that element.
Discuss stellar evolution. What forces are opposing one another throughout the life of a star and how do they influence the various stages in the life cycle
Infer what you can say about the velocity of a car that is moving with a constant momentum.
Calculate the time in seconds an Olympic skier would take to finish a 2.6 km race at an average velocity of 28 m/s downhill.
If a rock is thrown upward with an initial velocity of 32 feet per second from the top of a 40-foot building, write the height equation.
Drier, vertical circle, radius, clothes, tumble, revolution per second, angular velocity, cetripetal force.
A pitcher throws a curveball that reaches the catcher in 0.53 s. The ball curves because it is spinning at an average angular velocity.
Estimate the order of magnitude (exponential power) for the number of grains of salt in a salt shaker.
What are the most convincing observations Galileo reports in The Starry Messenger that support the Copernican theory that the Earth moves around the Sun?
The red light associated with the Aurora Borealis is emitted by excited oxygen atoms at 6.60 X 10-7 m. What is the frequency of the light?
In uniform circular motion, the acceleration is perpendicular to the velocity at every instant. Is this true when the motion is not uniform.
What are Galileo's his most convincing arguments for saying that science and religion should not be regarded as antagonistic?
A car 3.5 m in length approaches an intersection that is 20 m wide. The light turns yellow when the car's speed is 20 m/s.
Rower A wishes to cross a river directly to the opposite bank (east) a distance of 30m. (i.e. at 90° to the shore).
You are cruising down the highway at 60 mph (100 kph) and, without losing speed you follow the road which veers to the right. Have you accelerated?
A woman is standing in the ocean, and she notices that after a wave crest passes, five more crests pass in a time of 50.0s.
A body consists of equal masses M of inflammable and non-inflammable material. The body descends freely under gravity from rest.
When looking at the night sky, you can see the light of different stars. If one star looks brighter than another, is it necessarily brighter? Explain.
A rocket is fired vertically upwards with initial speed V and is propelled by ejecting material downwards at a constant rate and with a constant speed.
Why do Sunspots always appear in pairs? Why do Sunspots always appear in pairs?
A raindrop is observed at time t=0 when it has mass m and downward velocity u. As it falls under gravity its mass increases by condensation.
Four stars of different mass arrive on the Main Sequence of the Hertzsprung-Russell Diagram at the same time. Which star has a mass just about the same
A 2-lb ball is thrown upward at 30ft/s from an origin 5-ft above the earth's surface. Using for your positive reference a vertical Y axis with its origin.