Answer:
E = 1440 kJ
Explanation:
It is given that,
Power of a cooker oven is 800 W
Voltage at which it is operated is 230 V
Time, t = 30 minutes = 1800 seconds
We need to find the electrical energy used by the cooker oven. The product of power and time is equal to the energy consumed. So,

So, electrical energy of 1440 kJ is consumed by the cooker oven.
Answer:
The answer would be A. The waves that heat a cup of water in a microwave oven
Explanation:
Below is an attachment containing the solution.
Answer:
1.5 m/s2
Explanation:
To solve this problem, you need to use the first kinematic equation:

First, you plug into the equation:

and solve for the given equation!
1.5 m/s2