Elements are identified by the nuclei of the atoms of which they are made. For example, an atom having six protons in its nucleus is carbon, and one having 26 protons is iron. ... Heavy elements can be formed from light ones by nuclear fusion reactions; these are nuclear reactions in which atomic nuclei merge together. This is how they are formed
So we want to know how long should we make the simple pendulum so it's period is T=200 ms = 0.2 s. Since the formula for simple pendulum is T=2*pi*sqrt(L/g) where T is the period, L is the length and g=9.81 m/s^2. Now we need to invert the formula to get the length: T/2pi=sqrt(L/g), we square both sides of the equation: (T/2pi)^2=L/g and multiply both sides with g:
g*(T/2pi)^2=L. Now we input the numbers and get that the length L= 0.00995m.
Answer:
40.3 min
Explanation:
First of all, let's convert every quantity into SI units:
(speed in the first part of the trip)
time during which the person has stopped
(average speed of the whole trip)
The average speed is the ratio between the total distance covered, d, and the total time taken, t:
(1)
The total distance covered is simply
where is the time during which the person has moved at 92.5 km/h.
The total time taken is
So (1) becomes
Solving for :
which corresponds to
So the total time of the trip is
The correct answer is
A concave lens diverges light and curves inward.
A picture of a concave lens and the ray diagram produced by it can be seen in attachment. As it can observed, the concave lens (also called diverging lens) is wider at the edges and narrow at the centre (so, it curves inward), and it can also be seen that the lens diverges the incoming light rays.