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An electrical source with an internal resistance of 4 Ω...

At the terminals of a receiver with a resistance of 4 Ω is installed a source with an internal resistance of 0.2 Ω and EMF (electromotive fo...
Diameter of a hole made by a bullet in a metal sheet is greater or smaller than the diameter of the bullet?

Diameter of a hole made by a bullet in a metal sheet is greater or smaller than the diameter of the bullet? Solution When the bu...
A uniform solid metal disk of mass 6.0 kg and diameter 2.0 cm hangs in a horizontal plane, supported at its center by a vertical metal wire. You find that it requires a horizontal force of 4 N tangent to the rim of the disk to turn it by 5 degrees, thus twisting the wire. You now remove this force and release the disk from rest

A uniform, solid metal disk of mass 6.0 kg and diameter 2.0 cm hangs in a horizontal plane, supported at its center by a vertical metal wi...
Physics Problems from Users and Solved

A 4 kg block ‘A’ and a 3 kg block ‘B’ are pushed together against a spring, and are tied with a cord. When cord breaks, the 3 kg block moves...
Electric Circuits Definition, Formulas and solved problems

Definition of Electric Circuits: An electric circuit is a closed loop or pathway that allows the flow of electric current. It consists of va...
The speed of an object at the end of 4 successive seconds is 20, 25, 30, 35 mph km/hr

The speed of an object at the end of 4 successive seconds is 20, 25, 30, 35 mph km/hr respectively the acceleration of the object is: a) 5m...
Of the 600 mg of potassium in a large banana, 0.0117% is radioactive K-40 ...

Of the 600 mg of potassium in a large banana, 0.0117% is radioactive K-40, which has a half-life, </2 of 1.25 × 109 y. What is the activi...
A steel cylinder has 25 mm in diameter and 1 m height. What is its mass?

A steel cylinder has 25 mm in diameter and 1 m height. What is its mass? We know ρ = 7800 kg / m 3 (steel density) d = 25 mm h = 1...
A shell is fired horizontally from a powerful gun located 144 ft above a horizontal plane ...

A shell is fired horizontally from a powerful gun located 144 ft above a horizontal plane with a muzzle speed of 800 ft/sec. (a) How long d...
The mass of an iron screw (p = 7800 kg / m3) is 11.7 g. What is the volume of the screw?

The mass of an iron screw (p = 7800 kg / c m 3 ) is 11.7 g. What is the volume of the screw? Solution We take the numerical density of th...