Energy is carried to Earth in a form of photons or simple radiation.
Answer:
Explanation:
Let F be the force applied by Ricardo
work done by him = force x displacement
= F x 54 unit
output of work
= mgh , m is mass of luggage , h is height by which luggage is lifted .
= 645 x 32 x 4.5
= 92880 ft-poundal.
According to question
output / input = .95
92880 / (F x 54) = .95
F = 1810.52 poundal.
Answer:
the recessional velocity of the galaxy is 2.736×10^-3 km/s
Explanation:
for the recessinal velocity of the galaxy as v and d being the distance of the galaxy from us and H as the hubble constant, then hubbles law says:
v = H×d
= (22 km/s per million light years)×108 light years
= (2.2×10^-5 km/s per light years)×108 light years
= 2.376×10^-3 km/s
Therefore, the recessional velocity of the galaxy is 2.736×10^-3 km/s
Answer:
No we cannot perform any experiment that tells us weather we are moving or not at a constant speed.
Explanation:
Motion of any body is relative to other reference bodies. We can perceive motion only if our position with respect to a fixed object changes. This is the fundamental concept of reference frame in classical physics or Newtonian Physics that motion is always from a reference.
We choose a fixed body as reference and ,measure the distance we cover from this fixed point and also our speed with respect to this fixed point. The choice of frame of reference is completely dependent on the observer.
Since in the given case a reference cannot be established outside the plane thus we cannot detect our motion.
Answer:
Tension.
<em><u>tension</u></em> is the name of force that opposes or goes opposite of gravity
Hope this helps!