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2 years ago

What are the consequences of the discovery of Airplanes?

Physics

1 answer:

Inessa [10]2 years ago

8 0

Answer:

The use of airplanes also allows many people to acquire jobs in many different areas of aviation. The invention of the airplane led to new technologies, new ways of battle, modern warfare, and safer and more efficient travel. Space travel also would not have been possible without the idea of air travel.

Explanation:

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1. A stone is thrown upwards with an initial velocity of 25 m/s at angle of 30° to the ground a. Show that the vertical componen

Lana71 [14]

Answer:

sin 30° = $\frac{v_{y} }{25}$

Multiply each side by 25 to cancel the 25 under $v_{y}$

(25)· sin 30° = $v_{y}$

Multiply everything on the left side.

12.5 $\frac{m}{s}$ = vertical velocity component.

I attached a picture, I hope it helps.

7 0

3 years ago

A book of mass 3 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of the tilt. The coefficient o

bonufazy [111]

Answer: 24.7 degrees Max

Explanation:

m*g = 3 * 9.8 = 29.4 N. = Wt. of book. 

 Fp = 29.4*sin A = Force parallel to the plank. 

 Fn = 29.4*Cos A = Force perpendicular to the plank. 

 Fs = u*Fn = 0.46*29.4*Cos A  Fp-Fs = m*a

 29.4*sin A - 0.46*29.4*Cos A = m*0 = 0

 29.4*Sin A = 0.46*29.4*Cos A

 Sin A = 0.46*Cos A

 Divide both sides by Cos A:

 Sin A/Cos A = 0.46

 Replace Sin A/Cos A with Tan A:

 Tan A = 0.46

 A = 24.7 degrees Max.

8 0

3 years ago

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

If the speed of light is 3.0 × 108 m/s2, then how much energy would be released if a 23.7 gram object is converted to pure energ

elena55 [62]

7.11x 10⁶J

Explanation:

Given parameters:

Speed of light = 3 x 10⁸m/s

Mass of object = 23.7g = 0.0237kg

Unknown:

Energy = ?

Solution:

From Einstein's equation, we see that mass and energy are equivalent using the expression below:

E = mc²

Substituting the parameters:

E = 3 x 10⁸ x 0.0237 = 7.11x 10⁶J

Learn more:

Energy brainly.com/question/5381158

#learnwithBrainly

3 0

4 years ago

What is the simulation theory?

Inessa05 [86]

The simulation hypothesis<span> contends that reality is in fact a simulation (most likely a </span>computer simulation<span>), of which we, the simulants, are totally unaware. Some versions rely on the development of simulated reality, a fictional technology.</span>

7 0

3 years ago