atom is the smallest unit of an element that can or cannot exist freely. While on the other hand, a molecule is a set of atoms that are held together with the help of a bond and is the smallest unit of a compound. Furthermore, an atom can or cannot exist in a free state.
Answer:
Option A is the correct answer.
Explanation:
Static equilibrium means an object object is at rest and is in a state of equilibrium.
If we examine options B, C and D we can see that, in each case object is in a state of motion.
B) Tuna is in a motion.
C) Dolphin is a motion.
D) Zebra is a motion
In option A platypus lies motionless on the sand, which is an example of static equilibrium.
so, option A is the correct answer.
Frequency of the wave is 0.067 per second
Explanation:
- Frequency is the number of times waves pass at a particular point of time. Here, time period = 15 s
- Frequency is given by the formula
f = 1/T, where f is the frequency and T is the time period
⇒ f = 1/15 = 0.067 per second
The water molecule that is closest to the burner is in a very excited state, the molecule is moving rapidly this due to heat that is added to the molecule by the burner. while the molecule that is closest to the surface of the liquid is not very fast compared to the molecule near the burner, but it is still moving due to the heat transfer