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In order to test a certain property of light, a student arranged four similar card boards with holes at the center on a straight line such that all the holes are on a straight line. He then placed a burning candle at one end of the card boards and observed through the hole of a card board on the opposite end. What property of light was the student investigating?
A 3.6- cm-radius ball rolls down an inclined plane from rest at the top. The angular acceleration of the rolling ball about its center is 255 rad/s2, How long is the plane
A 43.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 346 N. Find the child's speed at the lowest point
An airplane is flying with a velocity of 92.0 m/s at an angle of 23.0 above the horizontal. How far from the dog will the suitcase land
A copper cable needs to carry a current of 200 A with a power loss of only 3.0 W/m. What is the required radius of the copper cable
a current of 24.0 ma is maintained in a single circular loop with a circumference of 2.70 m. a magnetic field of 0.520
A 67? resistor, an 9.0?F capacitor, and a 36mHinductor are connected in series in an ac circuit. Calculate the impedance for a source frequency of 300 Hz
An electric field does 11.10 MeV of work in moving a very small charged particle from point a to point b through a potential difference of -2.22 MV
A string is clamped at one end and the other end rests on a light, frictionless pulley with a mass hanging below it to provide a tension. What is the mass on the end of the string
How much work is needed to turn an electric dipole 180 o in a uniform electric field of magnitude 41.6 N/C if p = 2.66 × 10-25 C·m and the initial angle is 31.1o.
50 Joule of energy is used to heat up shrimp by 20oC. Determine the heat capacity of the shrimp
The two wires of length 2 m are 3 mm apart and carry a current of 10 A dc. Calculate the force between these wires
To determine the muzzle velocity of a bullet fired from a rifle, you shoot the 3.71-g bullet into a 2.45-kg wooden block. find the velocity of the bullet on leaving the gun's barrel
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