51mm = 5.1e-5km
0.00005100000km
Answer:
As per Provided Information
- Mass of car m is 1400Kg
- Initial velocity u is 13m/s
- Time taken to stop t is 5 second .
- Final velocity v is 0m/s
we have been asked to determine the force applied to stop the car. First we will calculate the acceleration of the car.
Substituting the value and let's solve it
Now, let's calculate the force applied to stop the car .
Substituting the value we get
Here , negative sign show that the " Force is acting in opposite direction of the motion"
<u>Therefore</u><u>,</u>
- <u>3</u><u>6</u><u>4</u><u>0</u><u> </u><u>Newton</u><u> </u><u>force </u><u>is </u><u> </u><u>required</u><u> </u><u>to</u><u> </u><u>stop</u><u> </u><u>the </u><u>car </u><u>.</u>
Answer:
462000J
Explanation:
Quantity of heat= mass x specific heat capacity of iron x change in temp
specific heat capacity of iron is 462J/Kg/K
change in temp = 250-50= 200°C
200°C is equivalent to 200K since 1°C is 1K
Q= mct
= 5x462x200
= 462000J
The correct answer to the question is 8.33 minutes.
CALCULATION:
The distance of earth from sun s = 150 million km.
We know one million = 10 lakh =
Also 1 km =
Hence, the distance s =
=
The speed of light c = 300,000 km per second
=
We are asked to calculate the time.
The time of the reaching earth is calculated as -
We know one minute = 60 second.
Hence, 500 seconds =
= [ans]
<span>Weight is a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.</span>