Which sentence describes Newton's second law?

An airplane in level flight travels horizontally with a constant eastward acceleration of 8.50 m/s2 and a constant northward acc

zloy xaker [14]

Answer:

$d = 3574.3 m$

Explanation:

Given that acceleration of the airplane is

$a_x = 8.50 m/s^2$

$a_y = -28 m/s^2$

initial velocity is given as

$v_x = 83.5 m/s$

$v_y = -15.5 m/s$

now we have displacement in x direction given as

$x = v_x t + \frac{1}{2}a_x t^2$

$x = (83.5)(14) + \frac{1}{2}(8.5)(14)^2$

$x = 2002 m$

Displacement along y direction is given as

$y = v_y t + \frac{1}{2}a_y t^2$

$y = (-15.5)(14) + \frac{1}{2}(-28)(14^2)$

$y = -2961 m$

so the magnitude of the displacement is given as

$d = \sqrt{x^2 + y^2}$

$d = \sqrt{2002^2 + 2961^2}$

$d = 3574.3 m$

7 0

4 years ago

What is the symbol which looks like fish means? GUYS HELPP

iren [92.7K]

<h2>The symbol is called an Alpha and means <em><u>"varies as"</u></em></h2>

6 0

3 years ago

A middle-aged man typically has poorer hearing than a middle-aged woman. In one case a woman can just begin to hear a musical to

Dmitriy789 [7]

Answer:

4

Explanation:

$I_0$ = Threshold intensity for woman

I = Intensity of sound for man

$\beta$ = Intensity level of sound = 6 dB

Intensity level of sound is given by

$\beta=10log\dfrac{I}{I_0}\\\Rightarrow 6=10log\dfrac{I}{I_0}\\\Rightarrow \dfrac{6}{10}=log\dfrac{I}{I_0}\\\Rightarrow 10^{\dfrac{6}{10}}=\dfrac{I}{I_0}\\\Rightarrow \dfrac{I}{I_0}=10^{\dfrac{6}{10}}\\\Rightarrow \dfrac{I}{I_0}=10^{0.6}\\\Rightarrow \dfrac{I}{I_0}=3.98\approx 4$

The ratio is 4

8 0

4 years ago

A cubical box measuring 1.29 m on each side contains a monatomic ideal gas at a pressure of 2.0 atm How much thermal energy do t

Marrrta [24]

Answer:

a) $U = 652.545\,kJ$ , b) $v \approx 659.568\,\frac{m}{s}$

Explanation:

a) According to the First Law of Thermodinamics, the system is not reporting any work, mass or heat interactions. Besides, let consider that such box is rigid and, therefore, heat contained inside is the consequence of internal energy.

$Q = U$

The internal energy for a monoatomic ideal gas is:

$U = \frac{3}{2} \cdot n \cdot R_{u} \cdot T$

Let assume that cubical box contains just one kilomole of monoatomic gas. Then, the temperature is determined from the Equation of State for Ideal Gases:

$T = \frac{P\cdot V}{n\cdot R_{u}}$