please check:

1. A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall.

STRAIGHT DOWN

2. Which is the force of an acceleration?

FORCE

3. A free-body diagram of a ball falling in the presence of air resistance would show

A DOWNWARDS ARROW TO REPRESENT THE FORCE DUE TO GRAVITY AND AN UPWARD ARROW TO REPRESENT THE FORCE OF AIR RESISTANCE

4. As an object falls toward Earth

THE OBJECT EXERTS A DOWNWARD FORCE ON EARTH

5. A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter's acceleration?

0.22 M/S^2

6. A hocky stick hits a puck on the ice. Identify an action-reaction pair in this situation

THE STICK EXERTS A FORCE ON THE PUCK; THE PUCK EXERTS A FORCE ON THE STICK

7. Calculate the following, expressing the answer in scientific notation with the correct number of signifant figures: (8.86 + 1.0 * 10^-3) / 3.610 * 10^-3

i don't really get this one

I don't understand 2.

On 4, forces occur in pairs, the downward force on the object is matched by an upward force on Earth.
7.
when multiplying or dividing the number of significant digits in the answer is equal to the leesor number of significant digits in either of the original numbers.

Well, let's break it down:

(8.86 + 1.0 * 10^-3) / 3.610 * 10^-3

First, let's simplify the numerator:

8.86 + 1.0 * 10^-3 = 8.861 * 10^0

Now, let's simplify the denominator:

3.610 * 10^-3 = 3.61 * 10^-3

So, the expression now becomes:

(8.861 * 10^0) / (3.61 * 10^-3)

Since we're dividing, we can subtract the exponents:

(8.861 * 10^0) / (3.61 * 10^-3) = (8.861 / 3.61) * 10^(0 - (-3))

Now, divide:

(8.861 / 3.61) * 10^(3) = 2.448

So, the final answer is approximately 2.448, without scientific notation. I hope that helps!

To solve this problem, first, perform the addition within the parentheses:

8.86 + 1.0 * 10^-3 = 8.861 * 10^0

Next, divide the result by 3.610 * 10^-3:

(8.861 * 10^0) / (3.610 * 10^-3) = (8.861 / 3.610) * (10^0 / 10^-3)

Simplify the exponential terms:

(8.861 / 3.610) * 10^(0 + 3) = 2.449 * 10^3

So, the answer is 2.449 * 10^3 expressed in scientific notation with the correct number of significant figures.

To calculate the expression (8.86 + 1.0 * 10^-3) / 3.610 * 10^-3 and express the answer in scientific notation with the correct number of significant figures, follow these steps:

1. Evaluate the expression inside the parentheses: (8.86 + 1.0 * 10^-3)
- Add 8.86 to 1.0 * 10^-3: 8.86 + 0.001 = 8.861

2. Divide the result from step 1 by 3.610 * 10^-3:
- Divide 8.861 by 3.610 * 10^-3: 8.861 / (3.610 * 10^-3)

Note: When dividing scientific notation, you divide the numbers and subtract the exponents. In this case, 8.861 divided by 3.610 is approximately 2.447709. Then, the exponents are subtracted: 10^0 - 10^-3 = 1 - (-3) = 4.

3. Express the final answer in scientific notation with the correct number of significant figures:
- The number 2.447709 has six significant figures.
- Write it in scientific notation using the correct number of significant figures: 2.447709 × 10^4