Answer:
78.156 m/s
Explanation:
(assuming no upthrust from the air on the arrow)
Ball has a motion only under ther gravity
Apply motion equation upwards
(g = 10m/s²)
V² = U² + 2as
= 82.5² + 2*(-10)*(36.3-1.41.)
= 6108.45
V = 78.156 m/s
multiply the six sides of the cube(LB), since length is 2000, then breadth will be 2000 also
Answer:
330 m/s approx
Explanation:
The RMS speed of a gas is proportional to square root of its absolute temperature is
V ( RMS ) ∝ √T
Here V₁ = 200 , T₁ = 23 +273 = 300K , T₂ = 227 +273 = 500 K
Putting the values
200 / V₂ =
V₂ = 330 m/s approx
Answer:
The H-R diagram can be used by scientists to roughly measure how far away a star cluster or galaxy is from Earth. This can be done by comparing the apparent magnitudes of the stars in the cluster to the absolute magnitudes of stars with known distances (or of model stars).
Answer:
As a skydiver falls, he accelerates downwards, gaining speed with each second. The increase in speed is accompanied by an increase in air resistance so it depends
Explanation: