Climatology is a subspecialty of B) Meteorology.
We don't know WHY there are gravitational forces that attract everything
to everything else.
We DO know that the more mass is involved, the stronger the forces are,
and we know that if an object had no mass then it wouldn't be affected by
gravity. So you could say that it's MASS that gives an object gravity, and
the more mass the object has, the more gravity it has.
Answer:
Explanation:
Given
Distance to the planet = 35 light years. So, the entire distance is: 2 * 35 = 70.
i.e time of travel of the ship.
For the observer on earth, the time is:
The required speed so that it does not take more than 70 years is then calculated using:
Substitute
So, we have:
Make v the subject of formula.
Square both sides
Cross Multiply
Divide both sides by
Divide through by
Make the subject
Inverse both sides
Take square root of both sides
Substitute values for and
Energy Transformations Examples. An energy transformation is the change of energy from one form to another. Energy transformations occur everywhere every second of the day. There are many different forms of energy such as electrical, thermal, nuclear, mechanical, electromagnetic, sound, and chemical.
Answer:
Angle θ ≅ 21.5°
Explanation:
Given:
speed Vi= 60 m/s, Range R= 250 m, g=9.81 m/s²
To find:
Angle θ = ?
Sol: we know that Rang R = Vi² sin 2θ / g
⇒ Sin 2θ = g×R / Vi²
Sin 2θ = (9.81 m/s² × 250 m) / ( 60 m/s)²
Sin 2θ = 0.68125
2θ = Sin ⁻¹ (0.68125)
2θ = 42.9413
θ = 42.9413 / 2
θ = 21.4706 ≅ 21.5°