Evide
a. r
b. s
c.
d.
to
2. dr. yuri eker is studying a severe form
of cancer. he injects a laboratory ani: nal
that has the cancer with a new drug. seven
days later, the animal is free of the cancer.
which of the following steps should
dr. eker follow next?
wong tu
a. repeat the experiment many times over a
few months
b. call a press conference reporting the
amazing results
c. write a report for a prestigious
science journal
d. prepare an acceptance speech for the
expected award of the nobel prize
5. wi
we
a

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.