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Given are the vectors A = 30 Newtons 45 degrees N of W and B = 45 Newtons 75 degrees S of E. Determine their resultant in Newtons
A 58.6g mass connected to a spring with a force constant of 31.2 N/m oscillates on a horizontal, frictionless surface with an amplitude of 3.70 cm. Calculate the total energy of the system
You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won't do the job, since all you can tell is that each needle is less than a millimeter thick.
A 175-g lump of molten lead at its melting point, 327°C, is dropped into 55 g of water at 20.0°C. What is the temperature of the water when the lead becomes solid? When the lead and water are in thermal equilibrium, what is the temperature?
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface, what are the strengths and direction of the electric field
q1. how many revolutions per minute would a 29 rm m-diameter ferris wheel require to make for the passengers to feel
an electromagnetic wave strikes a 2.60 cm2 section of wall perpendicularly. the rms value of the waves magnetic field
Why are the metals gold and silver found as elements in nature, whereas the metals sodium and magnesium are found in nature only in compounds? What is the relationship between the terms mole and Avogadro's number?
Average Speed The average speed is the total distance covered over the time interval it took to cover that distance. Average Speed = total distance / total time. It is 180 kilometers between Long Beach and San Diego.
1. Describe the forms of porosity that exist in "killed steel" and "semi-killed steel". 2. Why does preheating and postheating reduce the amount of hydrogen left in a weld?
When the coil of a motor is rotating at maximum speed, the current in the windings is 5.4 A. When the motor is first turned on, the current in the winding
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 3.00 m/s upward. How long does the cork remain in the air
A box of mass 8.0 kilogram is accelerated from rest across a floor at a rate of 3.0 m/s for 6.0 s. Obtain what is the net work done on the box
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