By chromatography it's the answer
Answer:
The new kinetic energy would be 16 times greater than before.
Explanation:
Kinetic energy is found using this formula:
- KE = 1/2mv²
- where KE = kinetic energy (J), m = mass (kg), and v = velocity (m/s)
We can see that kinetic energy is directly proportional to the square of the velocity, meaning that if the speed was increased by 4 times, then the kinetic energy would get increased by a factor of 16.
The velocity just before the ball hits the ground can be found by the equation:
Let's substitute h = 10 m and h = 40 m into this formula.
We can see that the velocity increases by a factor of 4 (10 m → 40 m).
Therefore, this means that the kinetic energy would also be increased by a factor of (4)² = 16. Thus, the answer is D) The new kinetic energy would be 16 times greater than before.
Answer:
Explanation:
Given data
Average intensity of sunlight on one day I=700 W/m²
Power P=170 W
To find
Area A
Solution
As we know that:
Answer:
Explanation:
Given that,
Gas central heating was used for 5days
At a rate of 102kWh of energy
Then, 1 kWh = 7p
So,
The total time is 5days
t = 5days
1 day = 24hours
Then, t = 5days = 5 × 24 = 120hours
Given 102kWh, then, they consumers 102 kW in one hour, then, for the 120hours,
The total energy used is 102 × 24
Then, total energy = 2448 kWh
So, 1 kWh = 7p,
Then, 2448 kWh = 7 × 2448
2448 kWh = 17,136 p.
So, the cost of the using central heat is 17,136 p
Depends how far you live from your friend
