Efficiency is defined as the measure of the amount of work or energy is conserved in a certain process. At all times, in every process, work or energy is always lost or wasted due to certain interference. Not all work given is converted to useful work or energy. Thus , efficiency is calculated by dividing the energy or work output to the energy or work input then the value is multiplied by 100 to express efficiency as percentage.
Efficiency = work output / work input Efficiency = (1540 J / 1600 J) x 100= 96.25%
Thus, the answer is B.
ANSWER: D) distributaries
EXPLANATION: When a deposition causes the main channel of a stream to divide into several smaller channel it is called a distributary. They are a common feature of river deltas and is also known as river bifurcation. A distributary generally occurs near a lake or ocean and can also occur near a confluence of large stream. This is popularly also known as arm or channel.
Answer:
1. Get the mass of each element by assuming a certain overall mass for the sample (100 g is a good mass to assume when working with percentages). ...
2. Convert the mass of each element to moles. ...
3. Find the ratio of the moles of each element. ..
4. Use the mole ratio to write the empirical fomula
The most distant planet is pluto
Answer:
photons per sec:
f = 3.033 E14 s-1
Explanation:
photon energy (E) is only a function of the photon wavelength:
⇒ E = h.c / λ
∴ h ( Planck contant) = 6.626070150 E-34 J.s
∴ c ( veloc. of light) = 3.0 E8 m/s
∴ λ ( wavelength) = 989 nm ( 9.89 E-7 m )
⇒ E = ((6.626070150E-34)(3.0E8))/(9.89E-7) = 2.01 E-19 J
Planck-Einstein:
∴ f: frecuency
⇒ f = E/h = 2.01 E-19 J / 6.626070150 E-34 J.s
⇒ f = 3.033 E14 s-1
