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Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. If a block of gold, with a mass of 24.30 g, is pressed into a leaf of 1.250 micrometer thickness, what is the area of the leaf in square meters?
A 0.60 nF parallel-plate capacitor has plate area A = 1.4×10?4 m. what is the plate separation
A bullet of mass 5.2 g is fired horizontally into a 7.1 kg wooden block at rest on a horizontal surface. At what speed is the bullet fired
Because of air resistance a constant torque exerted on the system to keep it spinning at that rate. Assuming that the air exerts a miniscule force on the stick (but a significant force on the ball), identify the force the air exerts on the ball.
If she is served 200 of coffee at 84 in a well-insulated container, how much ice at 0 should she add to obtain a final temperature of 31.
A 4 kg block rest against one end of a horizontal spring which is compressed by 20 cm. Calculate the constant of kinetic friction Mk between the block and the table
You are standing at a red light on SW 8th Street at 97th Avenue. The light turns green, find the work done on your car by the frictional force
A small fly of mass 0.21g is caught in a spider's web. What is the value of the effective spring stiffness constant k for the web
A Carnot engine works between temperatutes T1 = 495K and T2 = 302K. What is the Carnot coefficient of performance, KC, of the refrigerator
What distance does baseball move before its release
Four wires meet at a junction. In two of the wires currents I1 = 1.55 A and I2 = 2.15 A enter the junction. Find the current in the fourth wire and indicate its direction
A cart of mass m1=0.5 kg moves with a velocity of 0.9 m/s to the right on a frictionless track. What is the velocity of each cart after the collision
A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37 degrees above the horizontal. If the mass of the box and the books is 40 kg, what is the normal force on box? a. 332 N b. 312 N c. 392 N d. 292 N
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