An electric kettle has an efficiency of 76%. 2500 j of energy is transferred
from the mains to the kettle every second. when the kettle is full, it needs to
transfer 418 000 j of energy to the thermal energy store of the water to boil it.
calculate how long a full kettle needs to be switched on for in order to boil the water.

What best describes a sonar wave? transverse and electromagnetic transverse and mechanical longitudinal and electromagnetic longitudinal and mechanical

In what direction does an applied force move an object

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size