Other Physics Answers

You place an object 22 cm in front of a concave lens with a focal length of -35 cm. Find the image distance and magnification that results from this arrangement.

You place an object 22 cm in front of a concave lens with a focal length of -35 cm. Find the image distance and magnification that results from this arrangement.

Postulate of Bohr Atomic Model

What is Bohr atomic model

A. Illustrate the equations that describe the physical quantities of motion:

distance, displacement, velocity and acceleration.

he current in a tungsten filament lamp is 0.25 A. The filament has a radius o

f 5.4 × 10

−6

m

2

.

Tungsten has 3.4 × 10

28

electrons per cubic metre. Show that the mean drift velocity of the

electrons in this very thin filament is about 0.5 m s

−1

1. Compute the acceleration of the block sliding down a 20^o inclined plane if the coefficient of kinetic friction is 0.60.

1. A box is along a frictionless horizontal floor and a force of 250 N pushes the box with an angle of 40^o with the horizontal. Starting from rest, the box achieves a velocity of 8 m/s in a time of 4 seconds. What is the weight of the box and the force exerted by the floor on the box?

1. What must be the mass of a box that a man could carry in his hand if his muscles is 20 square centimeter?

In a pandayan (foundry), a pot made of cast iron slid and came to a complete stop atop a surface also made of cast iron. The pot was quite heavy (m= 2.5 kg) and had an acceleration of 4.5 m/s². Calculate the frictional force that stopped the pot. (Hint: Since the pot was originally sliding, the frictional force involved is kinetic friction.]