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kolezko [41]
4 years ago
8

An arrow is shot at an initial velocity of 224 ft/sec from a height of 44 feet, ay what time will the arrow be 824 feet above th

e ground?
Physics
1 answer:
Bingel [31]4 years ago
7 0

The arrow is subject to the constant downward pull of gravity, so its vertical position over time is given by

y=44\,\mathrm{ft}+\left(224\,\dfrac{\mathrm{ft}}{\mathrm s}\right)t+\dfrac12\left(-32.1\,\dfrac{\mathrm{ft}}{\mathrm s^2}\right)t^2

We want to find t for which y=824\,\mathrm{ft}. You should find two solutions at t=6.67\,\mathrm s and t=7.29\,\mathrm s.

You might be interested in
Explain temperature change and process of change on a cooling curve:
blsea [12.9K]

Answer:

When we heat a solid, the energy supplied is used to increase the kinetic energy of its molecules, and thereby its temperature increases. ... From solid to liquid at melting point or from liquid to gas at boiling point) is termed as its latent heat.

Process:

A cooling curve is a line graph that represents the change of phase of matter, typically from a gas to a solid or a liquid to a solid. This is because the matter has more internal energy as a liquid or gas than in the state that it is cooling to.  

The initial point of the graph is the starting temperature of the matter, here noted as the "pouring temperature". When the phase change occurs there is a "thermal arrest", that is the temperature stays constant. This is because the matter has more internal energy as a liquid or gas than in the state that it is cooling to. The amount of energy required for a phase change is known as latent heat. The "cooling rate" is the slope of the cooling curve at any point.

6 0
3 years ago
A jet aircraft with a mass of 4,475 kg has an engine that exerts a force (thrust) equal to 60,800 N. (a) What is the jet's accel
BartSMP [9]

Answer:

a) 13.59 m/s²

b) 67.95 m/s

c) 169.875 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

m = Mass

Force

F=ma\\\Rightarrow a=\frac{F}{m}\\\Rightarrow a=\frac{60800}{4475}\\\Rightarrow a=13.59\ m/s^2

Acceleration of the jet is 13.59 m/s²

v=u+at\\\Rightarrow v=0+13.59\times 5\\\Rightarrow v=67.95\ m/s

Velocity attained at 5 seconds is 67.95 m/s

v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{67.95^2-0^2}{2\times 13.59}\\\Rightarrow s=169.875\ m

Distance traveled in the 5 seconds is 169.875 m

4 0
3 years ago
Read 2 more answers
You have decided to select a new car by using the scientific method. how would you proceed? Please answer!!!
hammer [34]
We look at the  criteria to select a car.

If we are not too rich, we have to bother about fuel efficiency. The mileage in terms
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engine power - whether it is good enough over a slope (steep) that I may encounter
     frequently with my family members.

internal space / total external size :  or  internal space / total price:
   We find these numbers. after all , we make use of the internal space on seats.
   we have to know its proportion in the total volume of the car.

the axle turning capability, wheel turning ability :
   see the minimum radius and span required to turn a car in a U turn.

we have to bother about its pollution, emission level.

height / width ratio, which is important for the balance of the car.


==================================
If we are looking  at the economic point of view
   monthly benefit/savings of using the car,converted into currency - Loan EMI


8 0
4 years ago
Which of the
djyliett [7]

Answer:

Short THICC wire

Explanation:

6 0
3 years ago
Separate sheet of paper for your answer.
evablogger [386]

Answer:

I think its B. Please keep in mind that I could be wrong.

Explanation:

4 0
3 years ago
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