Physics Answers

Friges in an interference pattern is observed to be 2mm apart. if the silt separation is 1mm and the wavelenght of light is 400mm. What is the distance of the screen where the observation was made?

on top of a spiral spring of force constant 509N is placed placed in mass of 5x10raise to power 3 . If the spring is Compressed down ward by alength of 0.02m and then release Calculate the height to which the mass projected 

A box-shaped metal can has dimensions 7 in. by 12 in. by 3 in. high. All of the air inside the can is removed with a vacuum pump. Assuming normal atmospheric pressure outside the can, find the total force (in lb) on one of the 7-by-3 in. sides. (Enter the magnitude.)

Using Kirchoff Rule find the three current I1, I2, I3 where R1= 100ohms, R2= 10ohms, R3= 5ohms, E1= 12volts and E2= 6volts

1-5. Two point charges, q1 = 8 µC and q2 = -5 µC, are separated by a distance r = 0.1 m. What is the magnitude of the electric force? Note: 1 µC = 10-6 C.

6-10. Three positive point charges of 3.0 µC, 6.0 µC, and 2.0 µC, respectively, are arranged in a triangular pattern, as shown in the figure below. Find the magnitude and direction of the electric force acting on the 6.0 µC charge.

A bus moves 15 km east and turns 45 ᵒ N of E for another 5 km before coming to stop. Find the magnitude and direction of the resultant displacement of the bus.

Two thin, spherical, concentric metal shells have a radius of 6 cm and 8 cm. The inner shell carries a charge of 7 nC and the outer shell carries a charge of 4 nC. Find the resulting electric field at a) 7 cm from the centre; b) 10 cm from the centre.

At 12 cm in the radial direction from a conductive sphere of radius 10 cm, the electric field is 1800 N/C and its orientation points towards the interior of the sphere. Find the surface density of the charge on the sphere.

A boy on a 2.0 kg skateboard initially at rest tosses an 8.0 kg jug of water in the forward direction. If the jug has a speed of 3.0 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.60 m/s, find the boy’s mass.

if the hill is 50 m high, can it supply water

to the top floor of a 100-m tall office building? If

not, how does water get to that floor?