Answer:
Option A. 40 mi/h
Explanation:
To obtain the average speed of the vehicle, we'll begin by calculating the distance travelled by the vehicle in each case. This is illustrated below:
Case 1:
Speed = 30 mi/h
Time = 2 h
Distance =...?
Speed = Distance /Time
30 = Distance /2
Cross multiply
Distance = 30 × 2
Distance = 60 mi
Case 2:
Speed = 60 mi/h
Time = 1 h
Distance =...?
Speed = Distance /Time
60 = Distance /1
Cross multiply
Distance = 60 × 1
Distance = 60 mi
Finally, we shall determine the average speed of the vehicle as follow:
Total distance travelled = 60 + 60
Total distance travelled = 120 mi
Total time = 2 + 1
Total time = 3 h
Average speed =..?
Average speed = Total Distance travelled /Total time
Average speed = 120/3
Average speed = 40 mi/h
Therefore, the average speed of the vehicle is 40 mi/h
Answer:
Protons have about the same mass as electrons is false
Explanation:
Electrons and protons have the same magnitude on charge but opposite sign
: charge of electron
: charge of proton
Neutrons have no charge.
An atom is composed of protons and neutrons in the nucleus and electrons surrounding it, so a neutral atom has the same number of protons and electrons to has a net charge of zero. So, all the facts mentioned are true.
The false one is that protons have about the same mass as electrons, because the mass of an electron is 
and the mass of a proton is 
so the mass of a proton is a lot of bigger than electron mass.
Answer:
This is the answer bro hope it will help you
To assess your health status, it is necessary to take the physical fitness test, which will determine how healthy you are, according to some questions, such as how often you have seen a doctor, how is your heart, etc.
Some sample questions to assess your health status are:
- Have you seen a pshysician?
- Whats your heart condition according to your physician?
- Are you recommended to do some physical activity?
- Do you feel any chest pain if you are not doing physical activity?
- This past few days, do you feel any chest pain if you are not doing phsysical activity?
- Do you ever lose consciusness or lose your balance because of dizziness?
- Do you have any joint or bone injury or problem that could be made worse by performing physical activity?
Therefore, the physical fitness test is necessary so that a person can perform physical activities safely, avoiding injuries and other associated risks.
Learn more here:
brainly.com/question/24757304
