1 In the experiment shown in Figure 1,0.024 kg of water was collected in the beaker in 300 s with the heater turned off. The beaker was
then emptied and placed under the funnel again. With the heater
on for exactly 300 s, the joulemeter reading increased from zero to
15 000 J, and 0.068 kg of water was collected in the beaker.
a Calculate the mass of ice melted because of the
heater being on.
[1 mark]
b Use the data to calculate the specific latent heat of
fusion of water.
[2 marks]
2
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4 Estimate how long a 3000 W electric kettle would take to

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !