High task repitition, forceful exertions, repetitive or sustained awkward posture
Hey there!
1.) Without the atmosphere, average temperature on Earth would be freezing! Below zero to be exact!
2.) The atmosphere protects us and animals from dangerous radiation from the Sun. Ultraviolet radiation is basically invisible rays of energy created by the sun.
3.) Also, the atmosphere provides oxygen for humans and animals to breathe and C02 (Carbon dioxide) for plants.
4.) And lastly, the atmosphere protects us from objects coming towards the earth.
Hope this helps!
Answer:
60 grams
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
m = Mass
F = Force
Impulse
Mass of the tennis ball is 60 grams
or
Answer:
91 km
Explanation:
Draw a picture. The line of sight to the horizon forms a tangent line with the curvature of the Earth. The radius line to that point forms a right angle with the tangent line. So we can use Pythagorean theorem to find the distance.
c² = a² + b²
(6400 km + 0.650 km)² = (6400 km)² + d²
d ≈ 91 km