diffirential calculus
a builder intends to construct a storage shed having a volume of 900ft^3, a flat roof and a rectangular base whose width is three-fourths the length. the cost per square foot of the materials is 4000.00 for the floor,6000.00 for the sides and 3000.00 for the roof. what dimensi...
diffirential calculus
two points are moving horizontally in space at different heights above the earth. show that the angle of elevation of the line joining them is greater when the distance between them is least.
diffirential calculus
considering the area of a circular ring as a increment of area of a circle, find approximately the area of a ring whose inner and outer radii are 3 inches and 3.02 inches, respectively.
diffirential calculus
a pole 27ft long is carried horizontally along a corridor 8ft wide and into a second corridor at right angles to the first. how wide must the secon corridor be?
diffirential calculus
a woman 6ft tall walks away from a light 10ft above the ground. if her shadow lengthens at the rate of 2ft/sec. how fast is she walking?
physics
The magnetic field shown in the figure decreases from 1.0 T to 0.4 T in 1.2 s. A 6.0 cm diameter loop with a resistance of 0.010 W is perpendicular to the field. a. Find the average emf induced in the coil during this time. b. What is the size and direction of the current indu...
physics
The coil of the ac generator rotates at a frequency of f =60.0 Hz and develops an emf of 120 V (rms). The coil has an area of A = 3.0 x 10 -3 m 2 and consists of N = 500 turns. a. Find the magnitude of the magnetic field in which the coil rotates. b. If the total resistance of...
physics
The figure above shows a top view of a bar that can slide without friction. The resistor is 6.00 Ω and a 2.50 T magnetic field is directed perpendicularly downward, into the paper. Let l=1.20 m. a. Calculate the applied force required to move the bar to the right at a con...
physics
A coil of wire consists of 20 turns, or loops, each of which has an area of 1.5 x 10-3 m 2. A magnetic field is perpendicular to the surface of each loop at all times, so that Ø = Øo = 0°. At time to = 0s, the magnitude of the field at the location of the coi...
PHYSIC
A square wire loop 10.0 cm on each side carries a clockwise current of 15.0 A. Find the magnitude and direction of the magnetic field B at its center due to the four 1.20 mm wire segments at the midpoint of each side?
For Further Reading
