Electricity and Magnetism Answers

Please can someone answer this with solutions? Thank you very much

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.

Two charges, Q and -Q, are held stationary at a distance of 4 m. Q= 5x10^-6 is given. a) What is the potential difference VB-VA? b) A point charge of mass 0.3 g and charge 2x10^-6 C, initially at rest, leaves point A. What is the velocity at B?

(The distance between Q and point A is 2 m. The distance between A and B are 1 m. The distance between B and -Q is 1 m.)

A man uses a rock as a fulcrum and lifts a 300-kg boulder with a metal bar 6.00 m long. Calculare the force necessary to lift the boulder if the fulcrum is:

(a) 1.00 m from where the bar contacts the rock.

(b) 3.00 m from where the bar contacts the rock

Two charges located on the positive x-axis has a first charge of 5nc which is 2cm from the orgin and second charge of 9nc which is 4cm from the orgin, what is the magnitude of force exerted by these two force on a third charge 5nc located at the origin

1.How do insulator such as wearing rubber shoes reduce electrical damage to the human body?

2. Why does the production of sparks (current in air) in an explosive or flammable atmosphere should be prevented?

3. What might happen to a personif he/she approaches and reaches out for an object that is grounded if excess charge has accumulated on the person?

A train moves from an observer standing on a platform with a velocity of 10m/s. The siren emitted by the Train has a frequency of 50Hz.

A. What is the frequency of the sound heard by the observer?

B. What is the frequency of the sound heard by the observer in the Train?

(SPEED OF SOUND = 330 PER SECONDS)

A source of sound moves towards a stationary observer with a speed of ⅓ that of sound. If the frequency of the sound from the source is 100Hz, what is the apparent frequency of the sound heard by the observer

In a nucleus, two protons are 10^-15 m apart. a) What is their electrical potential energy? b) Knowing that they start from rest and are free to move, find their velocity when they are 4x10^-15 m apart.

What is the force in an electric field of 200 N/C?

What is the force on na electron in an electric field of 200 N/C?