Answer:
The modulus and argument are 2√2 and 3π/4. The polar form is 2√2(cos 3π/4 + i sin 3π/4).
Explanation:
Adam can clean a room in 3 hours. If his sister Maria helps, they can clean it in 225 hours. How long will it take Maria to do the job alone?
2 2 = 12 Together time, 2 2 , needs to be converted to fraction 555
Adan:3,Maria:x,Total: 5 Clearlystatetimesforeachandtotal,usingxforMaria 12
1+1= 5 Usingreciprocals,addtheindividualtimesgivestotal 3 x 12
1
1(12x) + 1(12x) = 5(12x) 3 x 12
4x+12=5x −4x −4x 12=x It takes Maria 12 hours
Multiply each term by LCD of 12x
Reduce each fraction
Move variables to one side, subtracting 4x Our solution for x
Answer is - 12 hours
Answer:
150°C
Explanation:
T1 = 7.00 C = 7 + 273 = 280 K
V1 = 49.0 ml
V2 = 74.0 ml
T2 = ?
Under constant pressure, V1/T1 = V2/T2, so
T2 = T1 * (V2/V1) = 280 * (74/49) = 423 K = (423 - 273) C = 150 C
If you measure the temperature of a chunk of ice, you may find it to be –5° Celsius or so. If you take temperature readings while heating the ice in a pot on your stove, you find that the temperature of the ice begins to rise as the heat from the stove causes the ice particles to begin vibrating faster and faster.
After a while, some of the particles move so fast that they break free of the crystal lattice (which keeps a solid solid), and the lattice eventually breaks apart. The solid begins to go from a solid state to a liquid state — a process called melting. The temperature at which melting occurs is the melting point (mp) of the substance. The melting point for ice is 32° Fahrenheit, or 0° Celsius.
The correct answer is - B) the water quality of the stream.
By studying the fish populations and their well being, the watersheds, as well as the composition of the water, the scientists are trying to keep track of the situation of the quality of the water in the stream.
The fish populations, their activity, well being, are always a nice indicator about the water quality, as they live in it and are directly effected by any negative changes in the water quality.
The watersheds can also show a partial picture of the quality of the water in the streams, and that is because the water passes through them before entering the stream itself, so a clean and healthy watershed, often means good quality of the water.
The most relevant indicator of the quality of the water in the stream is still the testing of the water itself, where the water composition can be examined in detail thus to be determined its condition.
