To watch this 3D videos exploring the surface of Mars, you will need a set of 3D glasses (Magenta Cyan / Red Blue)
When no light is present so why do we see black colour ?
Praveen Kumar asked
Black is not the color, it just denotes the absence of light.
When there is light, an object is seen black when it absorbs all light incident on it.
LIDAR stands for LIght Detection And Ranging.
LIDAR has the distinct advantage of being able to pick out one vehicle in a cluttered stream of traffic; your vehicle cannot be mistaken for another vehicle unlike radar, which has a broader pulse. It can also be used over a large distance, which makes it even more difficult to spot. License plates are typically the strongest LIDAR target, as they are covered in a retroreflective material that returns light back its source with a bare minimum of scattering.
The LIDAR system can determine your speed very quickly, about 1,000 times per second!
For more details please visit http://www.physicscentral.com/explore/poster-speed.cfm
The constant force that works in the object M=5 kg forces the object with mass m=4 kg to move with acceleration a=2 m/s^2.
The coefficient of friction between M and the table is 0.2.
a)F=? b) T=?
Elumna asked this
AskPhysics is now concentrating on releasing a series of useful apps for android devices.
The first in the series is gCalc –
(Settings –> Applications –> enable “Unknown Sources”
According to law of gravitation
If we bring two objects close to each other say our hands then the distance will be zero and the force of attraction will become infinite because r will we zero. Therefore F will become infinite but this is not the case.
When we touch our both palms together we can easily pull then away.
Asked Ankit Sharma
When we consider the distance, it is between the center of mass of the two bodies under consideration. When we bring our hands together the distance between their CM is not zero.
Other wise, the two particles under consideration must be point masses.
Then if you consider two atoms or two nuclei, the forces that come into play will be different if we decrease the distance between two atoms or nuclei. The attraction will turn into strong repulsion when the limits are exceeded.