Answer:
when you push up and down the pencil right in the middle of the water tank. it will produce ripples. If seen at the perfect angle you will observe the waves
Explanation:
Answer:
2.25 seconds
Explanation:
Change in Acceleration = change in velocity / time interval
time interval = change in velocity / change in acceleration
= (9 - 0) / (0 - -4) = 9/4
= 2.25 seconds
Answer:
The electrical energy is 13.5 kWh or 48600 kJ
Explanation:
Given that,
The power of the resistance heater, P = 4.5 kW
The water heater runs for 3 hours to raise the water temperature to the desired level.
We need to find the amount of electric energy used in both kWh and kJ.
Energy = Power × time
E = 4.5 kW × 3 h
= 13.5 kWh
Since,
1 kWh = 3600 kJ
13.5 kWh = 48600 kJ
Hence, the required electrical energy is 13.5 kWh or 48600 kJ
The first right-hand rule determines the directions of magnetic force, conventional current and the magnetic field. Given any two of theses, the third can be found.
The second Right-Hand Rule determines the direction of the magnetic field around a current-carrying wire and vice-versa<span> </span>
So, assuming that a magnetic field <span>exists and its direction is known and assuming that a charged particle moves in a specific direction through that field with velocity (v(, to determine the direction of force on the particle we should use the second right-hand rule.</span>
- Given - <u>a </u><u>car </u><u>weighing </u><u>5</u><u>0</u><u>0</u><u> </u><u>kg </u><u>takes </u><u>a </u><u>turn </u><u>of </u><u>radius </u><u>5</u><u>0</u><u>m</u><u> </u><u>with </u><u>a </u><u>velocity</u><u> </u><u>of </u><u>3</u><u>6</u><u> </u><u>km/</u><u>hr</u>
- To calculate - <u>the </u><u>centripetal </u><u>force</u>
where ,
<u>r </u><u>=</u><u> </u><u>radius</u>
<u>m </u><u>=</u><u> </u><u>mass </u><u>of </u><u>the </u><u>object</u>
<u>v </u><u>=</u><u> </u><u>velocity</u><u> </u><u>with </u><u>which </u><u>the </u><u>object </u><u>moves</u>
According to Question ,
<u>Mass </u><u>of </u><u>car </u><u>=</u><u> </u><u>5</u><u>0</u><u>0</u><u> </u><u>kg</u>
<u>Radius </u><u>of </u><u>the </u><u>round </u><u>=</u><u> </u><u>5</u><u>0</u><u> </u><u>m </u>
<u>velocity </u><u>of </u><u>car </u><u>=</u><u> </u><u>3</u><u>6</u><u> </u><u>km/</u><u>hr</u>
<u>Substituting</u><u> </u><u>the </u><u>values</u><u> </u><u>in </u><u>the </u><u>formula</u><u> </u><u>,</u>
hope helpful ~