One day while measuring acceleration with his pulse as a timing source, Galileo became so excited that his pulse rate increased. His results for acceleration that day were probably .
A. lower than usual.
B. higher than usual.
C. more accurate than usual.
D. unchanged.

A. Lower then usual.

Explanation:

Galileo use pulse as the time source but actually the pulse is stationary and the acceleration changes but how is the acceleration changes (Increased or decreased ) is the main question arises from here.

We know that the acceleration is given by rate of change of velocity with time. If he feels the pulse rate increases means the number of pulse count is more then usual means he take more time to gain the velocity (or to cover the distance). Means time increases as a result acceleration decreases.

So, we can say that acceleration is lower then usual.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2