Answer: Stars die when their nuclear fuel runs out.
Explanation:
Answer:
See Explanation
Explanation:
Temperature affects the amount of sugar that will be dissolved in a liquid. It is general knowledge in chemistry that solutes tend to dissolve in hot solvents compared to cold solvents.
Hence, there is a positive relationship between dissolution of sugar in a liquid and increase in temperature.
To test this hypothesis, the variables are temperature and amount of solute. The volume of solvent and type of solvent must be held constant.
Different amounts of solute are dissolved in the same volume of solvent and heated to a constant temperature and the extent of dissolution of the sugar is observed for each experimental unit.
A control experiment is also set up in which different amount of sugar is dissolved in the same volume of solvent as above without heating and the results are compared.
<h2>Answer </h2>
C. 40 m/s
<h2>Explanation </h2>
To solve this, we are using the kinematic equation for final velocity:
![v_f=v_i+a*t](https://tex.z-dn.net/?f=v_f%3Dv_i%2Ba%2At)
where
is the final velocity
is the initial velocity
is the acceleration
is the time
We know from our a problem that a motorcycle moving at 20 m/s accelerates uniformly 2 m/s^2 for 10 seconds, so
,
, and
.
Now we can replace the values
![v_f=v_i+a*t](https://tex.z-dn.net/?f=v_f%3Dv_i%2Ba%2At)
![v_f=20\frac{m}{s} +2\frac{m}{s^2} *10s](https://tex.z-dn.net/?f=v_f%3D20%5Cfrac%7Bm%7D%7Bs%7D%20%2B2%5Cfrac%7Bm%7D%7Bs%5E2%7D%20%2A10s)
![v_f=20\frac{m}{s} +2\frac{m}{s} *10](https://tex.z-dn.net/?f=v_f%3D20%5Cfrac%7Bm%7D%7Bs%7D%20%2B2%5Cfrac%7Bm%7D%7Bs%7D%20%2A10)
![v_f=20\frac{m}{s} +20\frac{m}{s}](https://tex.z-dn.net/?f=v_f%3D20%5Cfrac%7Bm%7D%7Bs%7D%20%2B20%5Cfrac%7Bm%7D%7Bs%7D)
![v_f=40\frac{m}{s}](https://tex.z-dn.net/?f=v_f%3D40%5Cfrac%7Bm%7D%7Bs%7D)
We can conclude that the velocity of the motorcycle will be 40 m/s after 10 seconds.
Galileo discovered during his inclined-plane experiments that a ball rolling down an incline and onto a horizontal surface would roll indefinitely.