Physics Questions
Explore questions in the Physics category that you can ask Spark.E!
After the cornea, where do the light rays go to be refracted for the second time?
the influence of a magnetic field on iron, which makes the iron a temporary magnet
an area of magnetic influence around a magnet
to act on and be acted upon by one or more objects
an instrument that uses a free-rotating magnetic needle to show the direction
the sum of all the forces acting on a mass
energy that matter has because of its position
a piece of iron that behaves like a magnet only when it is under the influence of an external magnetic field
If you see an object moving past you at 90% of the speed of light, what will its length appear to be?
Einstein's theory of special relativity contains some very strange ideas such as time dilation (moving clocks run slow), length contraction (moving lengths are shorter), and lack of absolute simultaneity. What is the basis of these ideas?
If you stay on Earth while a friend races off in a rocket at a speed close to the speed of light, then according to special relativity you will see a clock on the rocket appear to tick more slowly than the one on your wall. If your friend looks back at your clock, then according to the same theory the friend will see your clock appear to tick
According to Einstein's general theory of relativity, a clock that ticks at a regular rate far from a source of gravity will appear to tick
In what way is the general theory of relativity more "general" (i.e., deals with more situations) than the special theory of relativity?
In a binary star system, one component is found to have about 3 solar masses, the other about 7 solar masses. The 3-solar-mass star is visible from Earth, but the 7-solar-mass star is not. Theoretical considerations tell us that the 7-solar-mass star must be a
If an object is on a surface and isn't moving vertically, Fsupport = Fgravity = (mass) x (g), and Ffriction = (µ) x (Fsupport), what is the simplified equation?
Boyle's law states that the pressure of a gas increases if its volume also increases.
Which law states that energy cannot be created nor destroyed?
What are the vectors abbreviated in a three-dimensional space?
A gas expands to fill its container.
During a state change, the temperature of the substance also changes