Answer:
A. 0 m/s
Explanation:
The rest frame of an object is defined as the reference frame that is moving together with the object, so at the same speed of the object.
In other words, the rest frame of an object is defined as the reference frame in which the object is at rest, which means that is the reference frame in which the object has speed equal to zero (0 m/s).
Therefore, the correct answer is
A. 0 m/s
Light pollution<span> is excessive and inappropriate artificial </span>light<span>. The four components of </span>light pollution<span> are often combined and may overlap: Urban Sky Glow—the brightening of the night sky over inhabited areas. </span>LightTrespass—light<span> falling where it is not intended, wanted, or needed.</span>
Answer:
(a) 
(b) 
Explanation:
The average power is defined as the amount of work done during a time interval:

According to work-energy theorem, the work done is equal to the change in kinetic energy. So, we have:

Recall that the weight is given by:

The car accelerates uniformly from rest (
). Replacing (3) in (2), we have:

(a) Finally, we replace this in (1):

(b)

Answer:
T = 540 N (to two significant digits)
Explanation:
Let the crate dimension L be from strap attachment to floor contact
Let T be the strap tension
sum moments about the floor contact point to zero
mg[½Lcos25] - Tsin61[Lcos25] + Tcos61[Lsin25] = 0
L is common to all terms, so divides out.
½(71)(9.8)cos25 = T(sin61cos25 - cos61sin25)
T = (71)(9.8)cos25 / (2(sin61cos25 - cos61sin25))
T = 536.428020...
The pressure law states: "For a fixed mass of gas, at a constant volume, thepressure<span> (p) is directly proportional to the absolute temperature (T)."</span>