Search & Filtering
the terminal p.d of a battery is 12volts when an external circuit of 20 ohms was connected and 13.5volts when an external resistanceof 45 ohms was connected. calculate the e.m.f and the internal resistance of the battery
The drive had to stop suddenly. The cars shock absorber had an elastic potential energy of 258J The spring constant of the shock absorber is 45300 N/m. Calculate the extension of the shock absorber
A body weighs 0.5kg in air, 0.3kg in water and 0.2kg in a liquid, what is the relative density of the liquid?
7g bullet when fired from a gun into a 1kg block of wood in a vise penetrate the block to a depth of 8cm .what if? This block of wood is placed on a frictionless horizontal surface and a second 7g bullet is fired from the gun into a block. To what depth will the bullet penetrate the block in this case?
A 500 N boy is standing on frictionless roller skates. If someone pulls him, horizontally, with 40 N of force to the North, what will be his acceleration?
500 J of work is required by a machine to raise a load of 250 N through a vertical distance of 1.6 m. What is the efficiency of the machine?
A small is eating dinner on a flat table that is 1 meter tall. When asked to eat his vegetables, the child pushes his plate away from him at a speed of 4 m/s. Due to friction, the plate decelerates at a constant rate of 1 m/s2. After 1 second, the plate falls off the edge of the table.
a. How far did the plate travel over the 1 second?
b. What is the speed of the plate at the instant it falls off the table?
c. How much time will pass between the instant the plate leaves the table and the instant it reaches the ground?
d. At what speed will the plate strike the ground?
e. At what angle will the plate strike the ground?
State ohm law
Explain interference
Explain resistivity
