Answer:
η = 0.0333 = 3.33 %
Explanation:
The efficiency of any device is defined as the ratio of the useful output obtained from that device to the input required by the device. Therefore, the general formula to find the efficiency of any device is given as follows:
where,
η = efficiency of hair dryer = ?
O = Useful Output Given by the Hair Dryer = 150 J
I = Input Energy Required by the Hair Dryer = 4500 J
Therefore,
<u>η = 0.0333 = 3.33 %</u>
Answer:
no way I had that question too :-O anyways here's the answer
Explanation:
willow ptarmigan and Walia ibex
Answer:
(a.) 4z
(b.) 4w
Explanation:
From the equation y=4zcos(8πwt), where z and w are positive constants.
Comparing this equation to the equation of a wave y = Acos(Wt), where A is the amplitude (largest distance from equilibrium) and W is the angular frequency (W=2πf)
(a.) Comparing our wave equation with the given equation, we see that A = 4z in this case (furthest distance of the mass from equilibrium)
(b.) Comparing similarly we can see from our given equation that angular frequency W =8πw we also know that W = 2πf from our wave equation, therefore 2πf = 8πw
Solving for f we have f = 8πw÷2π
f = 4w (Proves our second answer because the frequency is the number of oscillations completed per second)
ANSWER 1: The manipulated variable is the fertilizer since the other factors (water and sunlight) are given in equal
amounts.
It is a controlled experiment because one group receives fertilizer while the other does not. Any
differences in growth should be due to either having fertilizer or not.
ANSWER 2: In order for it to be a theory, it has to be tested numerous times by multiple scientists.
Hope it helps. God bless
Electrons on the outermost shell/energy level
