URGENT HELP A student investigated how the mass of water in an electric kettle affected the time box
taken for the water to reach boiling point.
The kettle switched off when the water reached boiling point.
The heating element of the kettle was connected to the mains supply.
Explain why the temperature of the heating element increased.

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2

If you drive 12 miles north and 35 miles east, what is the direct distance between you and your starting point?

How could you cause a chemical change to vinegar?