Need some help with some physics work. i dont want overdue homework. 1.which of the following best describes a scalar value?
a. a measurement in more than one dimension that involves a magnitude and direction
b. a measurement in a single dimension that involves more than one number
c. a measurement that easily scales from one dimension to another
d. a measurement in a single dimension that involves only one number.

2.which of the following is an accurate statement about vectors?
a. rotating a vector about an axis passing through the tip of the vector does not change the vector.
b. the magnitude of a vector can be zero even if one of its components is not zero.
c. if two vectors have unequal magnitudes it is possible that their vector sum is zero.
d. it is possible to add a scalar quantity to a vector
e. the magnitude of a vector may be positive even if all of its components are negative.

that all i need. any help is welcome. thanks in advance.

1.) B

2.) E

Explanation:

A scalar quantity is the quantity in which we consider only it magnitude but not its direction.

1.) which of the following best describes a scalar value?

The best option is D and

The best answer is

d. a measurement in a single dimension that involves only one number

Also, Vector quantity is the quantity in which we consider both the magnitude and the direction.

2.) Which of the following is an accurate statement about vectors?

The best option is E

And the best answer is:

the magnitude of a vector may be positive even if all of its components are negative.

For instance, if two vectors are moving in a south and west direction, the resultant vector will still be positive.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.