Other Physics Answers

A conductor has a diameter of 3.0 mm. How many meters of this

material is needed to have a resistance of 1ohm? The resistivity of the

conductor is 1.68 x10−8 Ω. m

The critical angle for material C is 570. If an incident ray approaches the boundary between material C and the air at 590, the light ray will be bent back and total internal reflection happens. True or False.

A 23 kg object is pushed up an inclined plane with angle of inclination of 14 degrees. The coefficient of kinetic friction between the object and the incline is 0.30. Determine the acceleration of the object if it is pushed by a 250 N force that is acting parallel to the incline.

A 23 kg object is pushed up an inclined plane with angle of inclination of 14

0.The coefficient of kinetic friction between the object and the incline is 0.30. Determine the acceleration of the object if it is pushed by a 250 N force that is acting parallel to the incline.

True or False.

Total internal reflection will happen as the light ray goes from inside a diamond to the air outside, but not when the light ray goes from the air to the diamond.

A spring with a constant of 200 N/m stretches by 0.03m. What is the potential energy of the spring

The distance S in metres covered by particle at time T, seconds is given by S= 2t²– 3t² – 5t, find:

(i) it's speed In the 5th second.

(ii) the distance covered in the 3rd second.

(iii) the acceleration at T=5 seconds.

How much force is needed to punch a circular hole 1.2cm in radius in a metal plate of thickness 0.3 cm? The shear modulus of the metal is 150.0 x 106 N·m

A rock is thrown upwards with a speed of 7m/s. How much time does it take to reach the peak of its arc

a car travelling at 22.5m/s decelerate at 2.27m/s². how far does it go in third minutes after the brakes were applied