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An airplane propeller is rotating at 1900 rev/min.
(a) Compute the angular velocity in rad/s.
(b) How long in seconds does it take for the propeller to turn through 350 degrees?
An aluminum wire 5 m long and 2 mm diameter is connected in parallel with a copper wire 3m long.The total current is 4A and that is the aluminum wire is 2.5A.find the diameter of the copper wire.The resistivity of copper wire being 1.7molem and that of aluminum taken as 26nole ohms m.
1. A uniform electric field of magnitude E = 435 makes an angle of θ = 65.0 with a plane surface of area A = 3.50 as in the figure below. Find the electric flux through this surface.
An old rope can now only safely suspended 120 kg. When the rope is tied to a beam, it hangs down with a vertical length of 12.0 m. Calculate the minimum time required for an 85kg person starting from rest to climb the entire length of the rope without breaking it
A cyclotron for accelerating protons has a maximum radius of 0.700 m and has a magnetic field of 0.200 T.
(A) what is the cyclotron frequency?
(B)what is kinetic energy of the protons when they emerge?
Lying along the y-axis is a long, rigid wire which carries an 8.0 A current flowing in the positive direction.
(A) A 0.20 T constant magnetic field is directed along positive x-axis, find the magnetic force per unit length on the wire.
(B) If a 0.20 T constant magnetic force is directed 45 degrees from the +x-axis towards the +y-axis, solve for the magnetic force per unit length of the wire.
Three point charges arranged as shown. q1= 4.0x10-9C, 2 = 5.0x10-9C, q3= -6.0x10-9C. Find the net force on q1 due to q2 and q3.
q2---------- 0.5m ------q1--------- 0.3m -------q3
Three charges each 5.0x10-6C are situated at he corners of an equilateral triangle of side 1.0m. Find the force that charge q3 experienced due to the other two charges.
What is the total capacitance of a 10.0 F, 15.0 F, 20.0 F and 5.0 F if they are connected in parallel?
A table tennis ball has a diameter of 3.80 cm and an average density of 0.0840 g/cm3. What force is required to hold it completely submerged underwater?
