Answer:
the acceleration of the race car is 2 m/s²
Explanation:
Given;
initial velocity of the race car, u = 44 m/s
final velocity of the race car, v = 66 m/s
time of motion of the race car, t = 11 s
The acceleration of the race car is calculated as;

Therefore, the acceleration of the race car is 2 m/s²
Answer:
9.916\times 10^{-4}T
Explanation:
Diameter of toroid is 15 cm =0.15 m
So length of the toroid is 
Number of turns of the toriod is given as 555
Current through the toroid is 0.670 A
Magnetic field 
Answer:
horizontal structural member that supports a floor. Beams are typically wood, cold formed metal framing or steel.
Joists
Horizontal timbers, beams or bars supporting a floor.
They have scales and they rub off easily