A metallic wire of resistivity 2x 10-7Ω.m, has a section of 1 mm diameter & a resistance of 2.55 Ω. An electric current I passes through it. The electric energy consumed during 5 min. is 150 J. a. Calculate the length L of the wire.
b. Calculate the quantity of electricity that crosses the wire during 0.025 hours. (4pts)

What is the length x of the side of the triangle below? (hint: use the cosine function)

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)