Answer to number 8 please
Answers
Acceleration = (change in speed) / (time for the change)
(Note: That's all the Physics there is to this problem.
The rest is all arithmetic.)
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change in speed = (40 - 20) miles/hour = -20 miles/hour
time for the change = 10 minutes
Acceleration = (-20 miles/hour) / (10 minutes) =
-2 miles/hour per minute .
That's a perfectly good and technically correct expression for acceleration.
But obviously the units might make some people dizzy. So let's try to
clean it up a little.
Notice that 10 minutes is 1/6 of an hour.
So we could write the acceleration as
Acceleration = (-20 miles/hour) / (1/6 hour) = -120 miles/hour per hour =
-120 miles/hour² .
You could convert this into any units you like. It's really not a physics problem
any more, it's just an exercise in converting units.
Second segment: The airplane is maintaining its altitude. It is probably waiting for the other planes to clear away
Third segment:The airplane descending rapidly, with time and distance at a 1:2 ratio. It is probably landing
Sorry, my bad.
To find acceleration, we use v2-v1 /t
40mph - 20mph / 10 min
20mph/10min
We can convert this to 20/6 miles per 10 minutes, and cancel out the 10 min to 20/6 miles, which is 10/3 miles
Related Questions
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Which is best example of s force counteracting Fp?
In the Niagara Falls hydroelectric generating plant, the energy of falling water is converted into electricity. The height of the falls is about 48 meters. Assuming that the energy conversion is highly efficient, approximately how much energy is obtained from one kilogram of falling water? Therefore, approximately how many kilograms of water must go through the generators every second to produce a megawatt of power (106 watts)?
A system uses 2,380 J of energy to do work as 12,900 J of heat are added to the system. What is the change in internal energy of the system?
Answers
All you need in order to calculate the work done is the force exerted vertically ("lifting") and the vertical distance through which the force is exerted ("height").
Then Work = (force) times (distance).
Sadly, if you try to apply this simple definition of 'work' to the data you've given
for the situation, your attempt will fail ignominiously. You will say that Alex
has exerted a force of 10 kilograms to lift the documents 5 meters, and has
therefore done (10 x 5) = 50 somethings of work, which is wrong.
It's wrong because 'kilogram' is a unit of mass, not one of force.
Nothing 'weighs' 10 kilograms.
But my first paragraph is the direct answer to your question. The mass
of the stack of documents, and the height to which the stack is lifted, will
help you compute the amount of work Alex does.
Answers
Answer:
The thickness of sponge is the dependent variable in this investigation
Explanation:
This is because in the investigation, the amount of mass is the property to be varied while the thickness of the sponge is the property to be checked.
The thickness of the sponge is dependent on the amount of mass placed on it, so the thickness of the sponge depends on the mass.
Thus, the thickness of the sponge is the dependent variable in this instance while the amount of mass is the independent variable in this investigation.
Final answer:
In this scientific investigation about the relationship between the thickness of a sponge and the mass placed upon it, the 'dependent variable' is the sponge's thickness, and the 'independent variable' is the mass applied. The hypothesis may be that there's an exponential relationship between the mass and the sponge's thickness.
Explanation:
In the given scientific investigation, the dependent variable is the thickness of the sponge. This is because the thickness is the aspect of the experiment that changes (or is measured) based on the manipulation of another variable, which in this case is the amount of mass placed on top of the sponge, known as the independent variable. The investigator has control over the independent variable and observes whether changes to it cause a reaction or change in the dependent variable. In other words, the thickness of the sponge 'depends' upon the mass placed on it during the experiment. A possible hypothesis for this experiment may be that the thickness of the sponge decreases (get thinner) as more mass is placed upon it, suggesting an exponential relationship between the mass and the sponge's thickness.
Learn more about Dependent Variable here:
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Answers
Answers
Answer:
It means zero acceleration.
Explanation:
When a body moves with constant velocity then it is said to be there is no rate of change of velocity takes place because it is constant. So the acceleration becomes zero or uniform acceleration.
B. four
C. two
D. one
Answers
Oil spill can be very harmful to marine life because the chemical make up of oils can be poisonous to marine life. The oil can also affect the natural body temperature of marine animals especially to the small fish. Sea otters and sea birds are the most commonly affected by oil spills and those other marine animals that can be found in the shoreline. Heavy oils like the bunker oils used to fuel ships are the most harmful oil because when this oil stick to birds feathers, they may have an inability to warm themselves that could lead them to die.
Answer:
Three
Explanation:
Oil control rings are designed differently than compression rings. A typical oil control ring consists of three separate pieces: two very thin metal rings called scrapers, and a spacer ring called an expander placed in the groove between them.