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3 years ago

6

An object is thrown with a horizontal velocity of 49mt/sec and a vertical velocity of 18.8 mt/sec. How long will the object take

to return to earth. Please help asap

1 answer:

zaharov [31]3 years ago

5 0

Answer:

<em>The object takes 3.84 seconds to return to earth.</em>

Explanation:

<u>Projectile Motion</u>

It's when an object projected above the ground at a certain velocity, moves along a curved path under the action of gravity.

The initial velocity has two components, given by:

$v_x=vo_x$

$v_y=vo_y-gt$

Where vox is the initial component of the velocity in the horizontal direction, voy is the initial component of the velocity in the vertical direction, and t is the time.

The object reaches a maximum height and then it returns to the ground. The time it takes to reach the maximum height can be calculated when the vertical component of the velocity is zero:

$vo_y-gt=0$

$\displaystyle t_m=\frac{vo_y}{g}$

The initial vertical component of the velocity is 18.8 m/s, thus:

$\displaystyle t_m=\frac{18.8}{9.8}=1.92~s$

The total time is double that time:

$t_t=2*1.92~s=3.84~s$

The object takes 3.84 seconds to return to earth.

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The capacitor can withstand a peak voltage of 590 volts. If the voltage source operates at the resonance frequency, what maximum

kirill115 [55]

Answer:

The maximum voltage is 41.92 V.

Explanation:

Given that,

Peak voltage = 590 volts

Suppose in an L-R-C series circuit, the resistance is 400 ohms, the inductance is 0.380 Henry, and the capacitance is $1.20×10^{-2}\ \mu F$ .

We need to calculate the resonance frequency

Using formula of frequency

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Put the value into the formula

$f=\dfrac{1}{2\pi\sqrt{0.380\times1.20\times10^{-8}}}$

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We need to calculate the maximum current

Using formula of current

$I=\dfrac{V_{c}}{X_{c}}$

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$I=2\pi\times2356.88\times1.20\times10^{-8}\times590$

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Impedance of the circuit is

$z=\sqrt{R^2+(X_{L}^2-X_{C}^2)}$

At resonance frequency $X_{L}=X_{C}$

$Z=R$

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2 years ago

Assuming that each nucleus is roughlyspherical and that its mass is roughly equal to A (in atomic mass units {\rm u}), what is t

lara [203]

Answer:

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The area of a sphere is

A = 4π R₀²

ρ2 = F / 4π R₀²

ρ2 = F / 4π R₀²

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Let's look for the relationship of the two densities

ρ/ρ2 = ¾ A / π R₀³ / (F / 4π R₀²)

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3 years ago

An internal explosion breaks an object, initially at rest, into two pieces: A and B. Piece A has 1.9 times the mass of piece B.

Helen [10]

Kinetic energy of pieces A and B are 2724 Joule and 5176 Joule respectively.

<h3>What is the relation between the masses of A and B?</h3>

Let mass of piece A = Ma

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As per conservation of momentum,

Ma×Va = Mb×Vb

Here, Ma=1.9Mb

So, 1.9Mb × Va = Mb×Vb

=> 1.9Va = Vb

<h3>What are the kinetic energy of piece A and B?</h3>

Expression of kinetic energy of piece A = 1/2 × Ma × Va²
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=>1/2 × Ma × Va² + 1/2 × Mb × Vb² = 7900

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Learn more about the kinetic energy here:

brainly.com/question/25959744

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1 year ago