QUESTION 1 a)
1) A circular coil with radius 20 cm is placed with it's plane parallel and between two straight
wires P and Q. The coil carries current Icoil = 0.5A . Icoil is in clockwise direction when viewed
from left side. Wire P is located 40 cm to the left of a circular coil and carries current Ip = 0.2A
while wire Q is located 80 cm to the right of the circular coil and carries current lo =0.6A. Both
Ip and IQ are in the same directions into the paper. Determine the resultant of magnetic field at
the centre of a circular coil from the top view.
[7 marks]

Modify the equation fδt=δ (mv) to find the force of friction.

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.