The average speed of the car is 19.62 km/hr.
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find the average speed of the car
The given parameters;
initial velocity of the car, u = 25 km/hr
time of motion of the car, t= 1.5 hr
final velocity, v = 21 km/h
time of motion, = 1.25 hr
The average speed of the car is calculated as follows;
Thus, the average speed of the car is 19.62 km/hr.
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Answer:
Both A and C
Explanation:
I just got it correct on Edg
Other than temperature, the property that also has an effect on the rates of chemical reactions is the concentration of the reactants. The correct answer is B
The rate of chemical reaction means how chemical react with respect to time or as a function of time. The rate of chemical reaction tells us the speed or how fast chemicals react.
There are many factors that can affect the rate of chemical reaction. Temperature is one of them. Increase in temperature will increase the rate at which chemical react.
The color of reactants, solubility of reactants and volume of reactants have nothing to do with the rate of chemical reaction.
Other than temperature, the property that also has an effect on the rates of chemical reactions is the concentration of the reactants.
Other factors affecting the rate of chemical reaction are:
- the physical state of the reactants
- surface area
- temperature
- and the presence of a catalyst
Therefore, the correct answer is option B
Learn more about chemical reaction here: brainly.com/question/11231920?source=archive
Answer:
Smallest collector size≈30
Explanation:
Daily sunlight intensity = 1400
.
For a collector of 24% efficiency, the absorption per day per
= 0.24*1400 = 336.
For 8 hours, 25days of available sunlight, energy absorbed by collector per metre square , will be = 8* 25 *336 = 67200wh.
This is the amount of sunlight energy which will be trapped by 1. of collector in a month.
To find how many metre square of collector is required to get 2*
kwh, we simply divide the required energy by the amount absorbed per square metre.
Smallest size of collected needed = 
=29.76
≈30
1: Evaporation, this accounts for the most
2: Transpiration, second most
3: Sublimation, third most
