Determining temperature of star's, temperature, and a gravity question.?

Question

I need help on which answer is correct. I searched, but am still confused. I am thinking the answer to question 1 is C, but I am not sure. I am not sure about the other two also.

1. Which of the following statements about the force of gravity is false?

a. It is a universal force, which acts everywhere is space

b. Its strength decreases as the square of the distance

c. Its strength is inversely proportional to the mass: the more mass, the less gravity

d. The force never becomes zero.

e. It causes the paths of the planets to be ellipses and not straight lines

2. The most accurate way to determine the surface temperature of a star is to study.

a. the pattern of absorption lines from various atoms.

b. the peak wavelength of the star's continuum blackbody spectrum.

c. the relative intensities of light measured through different photometric filters.

d. pattern of emission lines that are on the star's spectrum.

3. Temperature is a measure of:

a. How much heat an object contains.

b. How fast atoms are moving

c. Energy

d. How hot you feel when you touch something.

Answer 1

Did you not pay attention in class?

1. Gm1m2/r^2

2. Wien's Displacement Law

3. The kelvin is called the thermodynamic temperature

Answer 2

1. c

2. c

3. d