The toast was moved upwards by the spring. The change in gravitational potential energy of the toast was 0.049 J
The mass of the toast was 0.050 kg
gravitational field strength = 9.8 N/kg
Calculate the change in height of the toast.
Change in height =
m
(3)
(Total 12 marks)

The ozone hole appears in antarctica during

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c

Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?