The answer is b) venus because the period rotation is also referred to as a day so if venus’ period of rotation is 243 [earth] days and its year is 225 [earth] days, then the period of rotation is longer.
Answer:
M v^2 / R = centripetal force
For Red: M v^2 / R = 5 * 9^2 / 1.5 = 270
For Blue M v^2 / R = 270 = 25 * 1.8^2 / Rb
So Rb = 25 * 1.8^2 / 270 = .3 m
Answer:
Another metaphor that can help explain energy quantization at the atomic level is the number of teams at different stages in the Football World Cup tournament taking each stage as a given amount of energy gained by the teams at that stage as follows;
Stage 1 Group Stage
The number of teams in the group stage = 32, Energy per team = 1
Knock out stages
Round of 16
The number of teams in the round of 16 stage = 16, Energy per team = 2
Semi final
The number of teams in the semi final stage = 8, Energy per team = 4
Quarter final
The number of teams in the quarter final stage = 4, Energy per team = 8
Final
The number of teams in the semi final stage = 2, Energy per team = 16
The winning team
The number of teams that win the World Cup = 1, Energy of the team = 32
As seen as each team has a specific energy level at each stage of the world cup and there can not any energy value that is an intermediate value of the energy of the teams each at each stage, so also at the atomic level particles within the atom and therefore the atom itself can possess only specific quantum of energy values in a given level or state.
Explanation:
<h2><u>Question</u> :</h2>
When an athlete perspires after running
- Evaporation occurs and helps to cool the body.
- Convection cools the body.
- The body absorbs cold from the surrounding air.
- Heat is conducted away from the body.
<h2><u>Answer</u> :</h2>
When an athlete perspires after running evaporation occurs and helps to cool the body.
Correct option is A.
<h2><u>Explanation</u> :</h2>
When an athlete perspires after running then sweat evaporates and we know that evaporation causes cooling as evaporation requires heat energy. The required heat energy is taken away by the molecules of sweat when they convert from liquid into gas, and this causes cooling on the surface of body. That's why it helps to cool the body.
GiveN:
- Initial velocity = 9.8 m/s²
- Accleration due to gravity = -9.8 m/s²
- Time taken = 1 s
To FinD:
- Final velocity of the ball?
Step-by-step Explanation:
Using the first Equation of motion,
⇒ v = u + gt
⇒ v = 9.8 + -9.8(1)
⇒ v = 0 m/s
The final velocity is hence <u>0</u><u> </u><u>m</u><u>/</u><u>s</u><u>.</u>
<h3>
Note:</h3>
- While solving questions of under gravity motions using equations of motion, remember the sign convection to avoid mistakes.
- You can consider positive above the ground and negative for towards it.