Answer please, anyone?

Physics

1 answer:

liq [111]3 years ago

7 0

Physical education is one of if not the most important aspect of school, and something we can immediately transfer over to our lives. Personally, I think physical education is a must in every school and every grade level. Children are becoming more obese due to the delicious taste of fast food and how easy it is to sit on video games for hours. Kids need to know that you should not be eating at mcdonald’s every day, and instead, meal prepping. The benefits of nutrition are phenomenal including but not limited to, increased muscle size and mass, a decrease chance of heart attack, decreased chance of major artery failure etc. If you take care of your body now, you won’t have to face the consequences when you are older, and if you adopt a healthy, active lifestyle now, not only will your heart thank you, but so will your future self, for those extra few years of life you got to spend happy, and fulfilled. — I hope this is what you were looking for!

You might be interested in

Two rocks, A and B, are thrown horizontally from the top of a cliff. Rock A has an initial speed of 10 meters per second and roc

maria [59]

Answer:

i need help

Explanation:

4 0

2 years ago

The radius of an atom of krypton (kr) is about 1.9 å. (a) express this distance in nanometers (nm). nm express this distance in

I am Lyosha [343]

Note:
1 A (armstrong) = 10⁻¹⁰ m
1 nm (nanometer) = 10⁻⁹ m

Given:
Radius of a krypton atom = 1.9 A = 1.9 x 10⁻¹⁰ m

Part (a)
$1.9\,A = (1.9\,A)*(10^{-10}\, \frac{m}{A})*( \frac{1}{10^{-8}} \frac{nm}{m}) } =0.019\,nm$
Answer: 0.019 nm

Part (b)
The diameter of a krypton atom = 2*1.9A = 3.8 A = 3.8 x 10⁻¹⁰ m.
The number of krypton atoms within a length of 1.0 mm is
$\frac{1.0\, mm}{3.8 \time 10^{-10}\, m} = \frac{10^{-3}\, m}{3.8 \times 10^{-10} \,m} =2.632 \times 10^{6}$

Answer: About 2.632 x 10⁶ atoms

Part (c)
The radius of a krypton atom is
1.9 A = (1.9 x 10⁻¹⁰ m)*(10² cm/m) = 1.9 x 10⁻⁸ cm
The volume of a krypton atm is
$\frac{4 \pi }{3} (1.9 \times 10^{-8} \, cm)^{3} = 2.873 \times 10^{-23} \, cm^{3}$

Answer: 2.873 x 10⁻²³ cm³

8 0

3 years ago

Assuming there are no accidents or delays, the distance that a car travels down the interstate

Ganezh [65]

Explanation:

The distance that a car travels down the interstate can be calculated with the following formula:

Distance = Speed x Time

(A) Speed of the car, v = 70 miles per hour = 31.29 m/s

Time, d = 6 hours = 21600 s

Distance = Speed x Time

D = 31.29 m/s × 21600 s

D = 675864 meters