Dao makes a table to identify the variables used in the equations for centripetal acceleration.

a 2 column 5 rows. the first column is labeled variable with entries a subscript c baseline, t, r, v. the second column is labeled quantity with entries blank, x, blank, y.
what quantities belong in cells x and y?

a. x: centripetal acceleration
y: period
b. x: tangential speed
y: radius
c. x: radius
y: centripetal acceleration
d. x: period
y: tangential speed

the correct answer is d. x: period y: tangential speed

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

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)

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these