Physics Answers

2. An infinitely long wire that has a radius of 3 cm contains a uniform charge density of 15 μC/m². Determine the total charge present in a 3.0-m long section of the copper wire and the magnitude of the electric field at a distance of 12 m from the wire.

How much ice at -20°c must be dropped on 0.5 kilograms of water initially at 20°c in oder for the final temperature to be 0°c with the ice all melted. Heat capacity of container can be neglected

A boy stands 42.35 m in front of a flat mirror, how far away from him will his image be in the mirror?

An orange and a red ray of light travels through vacuum before hitting a plane mirror also residing in the vacuum. Which of the following statements is/are true?

A sports car accelerates from rest to 26.8 m/s (roughlv 60 min) in 5.1 seconds. What le the acceleration the car

What charge is stored in a 180 μF capacitor when 120 V is applied to it?

A linear combination of two wave functions for a system is also a valid wave function. Find the normalization constant for the combination ψ = B(sin nπx L + sin πx L ) of the wave functions for the n = 1 and n = 2 states of a particle in a box L wide

A car starts to move at rest. It travels first 3km with a constant accelaration. Then it travels a distance of 7km with the obtained constant velocity. Then it decelerates for 2.5km and comes to rest. The total time taken for the journey is 15 minutes. The car travels along a straight road. Find the accelaration.

The resultant of the two forces has a magnitude of 650 N. Determine the direction of the resultant and the magnitude of P

 Two identical metallic spheres are suspended as bobs of a simple pendulum. Each of the bobs has a charge of  If each string is 1m long and makes an angle of 12 degrees to the vertical, (a) what is the electric force between the spheres? (b) The bobs touched each other and then separated. What then is the electric force between the sphere?