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3 years ago

a sydiver jumps out of a plane. She fall dowward at a very fast speed. Which force is acting upon it?

Physics

1 answer:

UNO [17]3 years ago

6 0

Answer:

There will be two forces acting on her: Gravitational force and Air resisitence

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Estimate the acceleration due to gravity at the surface of Europa (one of the moons of Jupiter) given that its mass is 4.9×1022k

Taya2010 [7]

Answer: $g=1.97 m/s^2$

Explanation:

Given

mass of Jupiter is $M=4.9\times 10^{22} kg$

Density of Jupiter is same as Earth

$density\ of\ Earth=density\ of\ Jupiter=5510 kg/m^3$

$mass=volume\times density$

considering Jupiter to be sphere of radius r

$M=\frac{4}{3}\times \pi r^3\times \rho$

$r^3=\frac{3M}{\rho \times 4\pi}$

$r^3=\frac{3\times 4.9\times 10^{22}}{5510\times 4\pi}$

$r=(\frac{3\times 4.9\times 10^{22}}{5510\times 4\pi})^{\frac{1}{3}}$

$r=1.28\times 10^6 m$

acceleration due to gravity is given by

$g=\frac{GM}{r^2}$

$g=\frac{6.67\times 10^{-11}\times 4.9\times 10^{22}}{(1.28\times 10^6)^2}$

$g=1.97 m/s^2$

3 0

4 years ago

Help with this question.......

bezimeni [28]

Answer:

its a liquid

Explanation:

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8 0

3 years ago

6. A plane due to fly from Montreal to Edmonton required refueling. Because the fuel gauge on the aircraft was not working, a me

LiRa [457]

Answer:

The amount of liters of fuel should have been added is 20093 L

Explanation:

Given that;

a mechanic used a dipstick to determine that 7682 L of fuel were left on the plane

i.e the volume of fuel left in the plane = 7682 L

Required fuel to make a trip = 22,300 kg of fuel

Also from the question; we are being told that in order for the pilot to determine the volume ; he asked for the density of the fuel and the mechanic said 1.77.

This volume of fuel was added and the plane subsequently ran out of fuel, but landed safely by gliding into Gimli Airport near Winnipeg. The error arose because the factor 1.77 was in units of pounds per liter (lbs/L).

Now; we can understand that the density of the fuel was 1.77 pound /litre.

SO , let convert 1.77 pound /litre to kg/Litre;

we all know that

1 pound = 0.4536 kg

1.77 pound/litre = x kg

If we cross multiply ; we will have:

1.77 pound/litre × 0.4536 kg = 1 pound × x kg

x kg = (1.77 pound/litre × 0.4536 kg) /1 pound

x = 0.802872 kg/litre

$\mathbf{Density = \dfrac{mass}{volume}}$

where ;

mass = 22,300 kg of fuel

volume = unknown ???

density = 0.802872 kg/litre

making volume the subject of the formula from above; we have:

$\mathbf{volume = \dfrac{mass}{Density}}$

$\mathbf{volume = 22300 \ kg \ of \ fuel *\dfrac{1 \ litre }{0.802872 \ kg \ of \ fuel}}$

volume = 27775.28672 litre

volume $\approx$ 27775 L

Let not forget that we are being told as well that the volume of fuel left in the plane = 7682 L

Now;

The amount of liters of fuel should have been added is: = 27775 L - 7682 L

The amount of liters of fuel should have been added is 20093 L

8 0

3 years ago

Consulting your data table, choose the date that the Moon is furthest from the Ecliptic.

Dmitry_Shevchenko [17]

I think you need to attach the data table

7 0

3 years ago

Calculate the upthrust on a object immersed in water if the object displace water of mass 2 kg.(g=9.8m/s²)

olga2289 [7]

Explanation:

Buoyant force = Weight of water displaced.

=mg=2×9.8N=19.6N.

7 0

3 years ago

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