Answer:
A plane mirror is a mirror with a flat (planar) reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of the incidence is the angle between the incident ray and the surface normal (an imaginary line perpendicular to the surface).
The cars will have equal speeds and the 2 kg car will have greater kinetic energy.
Answer:
E = F/q
Explanation:
Electric Field (E) : Electric Field (E) of an electrostatic field is defined as the force (F), per unit test charge (q) which it exert at that point. Its direction is that of the force exerted on a positive charge. The S.I unit of Electric field is Newtons per coulombs. (N/C).
Electric Field (E) can be expressed mathematically as,
E = F/q
Where F = Electrostatic force (Newton), q = charge (coulombs), E = Electric field.
Answer:
Explanation:
Answer:
Explanation:
The half life is the time taken for half of a radioactive substance to disintegrate.
The shorter the half life, the larger the decay constant and the faster the decay process.
For a very large half life, it would take a very long time for the radioactive nuclide to decay to half.
With each half life reached, a new set of daughter cell is formed. Atoms that have short half life would decay rapidly. Every radionuclide has its own characteristic half-life.
If the number of half-lives increases, then the number of radioactive atoms decreases, because approximately half of the atoms' nuclei decay with each half-life. With this observation, we can hypothesise and conduct experiment to support the assertion that as the number of half-lives increases then the number of radioactive atoms decreases.