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3 years ago

Urgent Please write the complete answer

Physics

1 answer:

Crazy boy [7]3 years ago

5 0

Multiply field strength (N/kg) by mass (kg) to get weight (N)

At the start, the car is carrying

4.7 kg * (9.8 N/kg) = 46.06 N

of fuel.

At the end, it is carrying

3.0 kg * (9.8 N/kg) = 29.4 N.

Assuming the car remains completely intact, its weight was reduced by

46.06 N - 29.4 N = 16.66 N.

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A 2.5-kg rock is dropped off a 32-m cliff and hits a spring, compressing it 57 cm. What is the spring constant? Round your answe

n200080 [17]

Answer: 4800 N/m

Explanation:

Given

mass of rock $m=2.5\ kg$

Height of cliff $h=32\ m$

compression in the spring $x=57\ cm$

Here, potential energy is converted into kinetic energy which in turn converts to elastic potential energy of the spring

$\Rightarrow mgh=\dfrac{1}{2}kx^2\\\\\Rightarrow k=\dfrac{2mgh}{x^2}\\\\\Rightarrow k=\dfrac{1568}{0.3249}\\\\\Rightarrow k=4826.100\approx 4800\ N/m$

6 0

3 years ago

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A "synchronous" satellite is put in orbit about a planet to always remain above the same point on the planet’s equator. The plan

zepelin [54]

Answer:

h = 1.014 x $10^{8}$ m

Explanation:

Given that,

The planet rotates once every 10.2 h

Therefore, in one hour it would take 1/10.2 rev/h

The rotational speed of the planet

= 0.098 rev/h

Converting into seconds

= 2.72 x $10^{-5}$ rev/s

Converting to radians, the rotational angular velocity is

ω = 1.709 x $10^{-4}$ rad/s

The mass of the planet, M = 2.2 x $10^{27}$ Kg

Radius of the planet, R = 6.99 x $10^{7}$ m

Gravitational constant, G = 6.67 x $10^{-11}$ Nm²/Kg²

To find the height 'h' of the synchronous orbit above the planet surface,

The orbital velocity of the planet is given by the expression

V = $\sqrt{\frac{GM}{R + h} }$

Since

V = (R+h)ω

Substituting in the above equation

(R+h)ω = $\sqrt{\frac{GM}{R + h} }$

Squaring on both sides

{(R+h)ω}² = ${\frac{GM}{R + h} }$

(R+h)³ = ${\frac{GM}{w^{2}}}$

Solving for h

h = $\sqrt[3]{{\frac{GM}{w^{2}}}}$ - R

Substituting the values in the above equation

h = $\sqrt[3]{\frac{6.67X10^{-11}X2.2X10^{27} }{(1.709X10 ^{-4})^{2} }}$ m

h = 1.014 x $10^{8}$ m

So, the height of the synchronous orbit above the surface is 1.014 x $10^{8}$ m

7 0

3 years ago

What happens to the molecules in water as it freezes?

Keith_Richards [23]

The molecules give off heat.

6 0

4 years ago

Read 2 more answers

50 POINTS PLZZ ANSWER

LekaFEV [45]

The Coordinate Methodology is a technique for converting geometrical images into formulas, a technique for describing visuals with letters and numbers representing constant and factors. It is essential in learning calculus and other mathematical topics, and the further calculation can be defined as follows:

$\to \bold{A(0,0)}\\\\\to \bold{B(100,0)}\\\\$