The pressure exerted by a fluid solely relies on the depth or height of the fluid, its density, and the gravitational constant. These three are related in the equation:
Pressure = density x g x height
In the problem, point A is within the block inside the tank. The water above the block is assumed to be 0.6 meters. This gives a point A pressure of:
P = 1000 kg/m^3 * 9.81 m/s^2 * 0.6 m = 5,886 Pa or 5.88KPa
Via half-life equation we have:
Where the initial amount is 50 grams, half-life is 4 minutes, and time elapsed is 12 minutes. By plugging those values in we get:
There is 6.25 grams left of Ra-229 after 12 minutes.
The work done is 8427 J while the energy expended is 80.25 W.
<h3>What is work done?</h3>
Work done is defined as the product of the force and the distance. We know that the work done in a gravitational field is given as;
W = mgh
Total mass of the water bucket and chain = 13.9 kg + 19.3 kg = 33.2Kg
Distance covered = 25.9 m
W = 33.2Kg * 9.8 m/s^2 * 25.9 m
W = 8427 J
Recall that the work done = Energy expended
Power = Energy expended/ Time
Power = 8427 J/ 1.75 * 60 seconds
Power = 80.25 W
Learn more about work and energy:brainly.com/question/17290830
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Power = (voltage) x (current)
500 W = (120 v) x (current)
Current = (500 w) / (120 v) = 4-1/6 amperes .
Power and current are both rates.
Power is the rate of using energy ... joules per second.
Current is the rate of flowing charge ... coulombs per second.
Neither quantity depends on how long you keep it up.
They're both going on continuously while the vacuum is running.
If a hummingbirds diet is composed mainly of honeysuckle
nectar, it would require 10g/0.020g * 15 seconds for sugar = 2.08 hours = 124.8 minutes
8g/0.010g * 15 for protein = 3.3 hours = 216 minutes
If a hummingbirds diet is composed mainly of nasturtium nectar,
it would require 10g/0.010g * 20 seconds for sugar = 5.5 hours = 330 minutes
<span>8g/0.010g * 20 for protein = 4.4 hours = 264 minutes</span>
