Physics Answers

What is the capacitance of a parallel plate capacitor with metal plates, each of area 1.00m², separated by 2.00mm? What charge is stored in this capacitor if a voltage of 3.00×10³V is applied to it?

A cube with sides measuring 5cm is place in an electric field with magnitude 3x10^3 N/C.

a. Calculate the flux in each side of the six face of the cube.

b. Calculate the total flux of the cube

A rubber ball is tied to a 3-meter string and revolves around an erect pole at a velocity of 7.5 m/s every five (5) seconds. What is the ball’s angular acceleration in radians per square second?

An electron (-q= +1.602 × 10-¹9) moves along a straight line from point b with a separation distance of 0.2 m.Considering the electric field along this line is uniform with magnitude of E=300 N/C and directed from points a to b.What is the magnitude of force electron?

A particle with a charge of +5.90 nC is in a uniform electric field E directed to the left.It is released from rest and moves to the left; after it has moved 60.0mm,it's kinetic energy is found to be +3.50 × 10-⁶.What is the potential difference of the starting point with respect to the end? What is the magnitude of electric field?

A particle perform simple harmonic motion in a straight line about a center C in the line.When it's distances from C are 5.0 and 13.0cm,it's velocities are 25.0 and 7.0cm/s respectively.Find the period and the amplitude of the oscillation. Hint: use V=±w(angular velocity)√(A² - y²) and solve simultaneously.?

An object is projected with a velocity U at an angle R to the horizontal.It just clears two walls of equal height b and at a distance of b apart. Show that 2U cosR√(U² sin²R - 2bg) = bg?

A car of mass 8000kg moves in a circular path of radius 100m with a linear velocity of 50m/s.Calculate the i) Angular velocity ii) Angle the tyre makes with the ground iii) condition for skidding for u(coefficient of friction)= 0.5?

It is known that the mass of the earth is 81 times the mass of the moon.Show that the point of weightless between the earth and the moon for a spacecraft occur at 9/10 of the distance to the moon Hint: Me/b²=Mm/(a-b)²?

A capacitor of capacitance 20 micro-microfarads consists of two parallel plates each moving an area of 200 cm^2, separated in air a distance d apart. This condenser is charged to a difference in potential of 200 V and it is then disconnected from the source. Find (a) the distance of separation d, (b) the charge stored in the condenser, (c) the work done in storing this charge, and (d) the work needed to pull the plates apart to a distance of 3d.