Answer:
See the answers and the explanation below.
Explanation:
To solve these questions we must understand that speed is the relationship between the displacement and the time that the displacement lasts.
1. 300 [km], in 5 [hr]
d = displacement [km]
where:
v = velocity [km/h]
t = time [hr]
In one hour :
b. Car B 100 [km] in 2 [hr]
C. The car A has the greatest average speed.
<span>As the core collapses, the </span>outer<span> layers of the star are expelled. A planetary nebula is formed by the </span>outer <span>layers. The core remains as a white dwarf and eventually cools to become a black dwarf. that is what would happen to a star with a low mass like our sun also the life time of a star depends on it's mass. A larger mass star will colapse and turn into a black hole.</span><span>
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B. +Q, + W are the correct sign
Answer:
The answer is C. 120,000 J.
Explanation:
Forces are <em>vectors</em>, which means they need to be determined by not only their numeric value (amount of force in Newton's) but also their <em>direction</em>.
Some other examples of vector quantities include displacement, acceleration, velocity, and momentum. Each of these isn't complete until you know its size and direction.
There are other quantities that have size but <u><em>no</em></u> direction. They include distance, speed, volume, temperature, cost, and loudness. These are called "scalars".