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4 years ago

5

The molecule arrangement of ice, water and steam are very different. _ has the most ordered arrangement, has the ne

xt most orderly arrangement, and ___________ has the least orderly arrangement of molecules

1 answer:

marysya [2.9K]4 years ago

3 0

Answer:

do you still need an answer

Explanation:

because if you are i could give it to you

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a resistor, of resistance 47 , is damaged when it dissipates a power greater than 0.5W. determine the maximum voltage that can b

harkovskaia [24]

Answer:

<em>The maximum voltage that can be applied without damaging the resistor is 4.85 V</em>

Explanation:

<u>Electric Power in a Resistor</u>

Given a resistor or resistance R connected to a circuit of voltage V carrying a current I. The relation between these three magnitudes is given by Ohm's Law:

V = R.I

The dissipated power P of a resistor can be calculated by the following equation, known as Joule's first law:

$P = I^2.R$

Solving the first equation for I:

$\displaystyle I=\frac{V}{R}$

Substituting in the second equation:

$\displaystyle P=\frac{V^2}{R^2}.R$

Simplifying:

$\displaystyle P=\frac{V^2}{R}$

Solving for V:

$V=\sqrt{P.R}$

The resistor has a resistance of R=47Ω and can hold a maximum power of P=0.5 W, thus the maximum voltage is:

$V=\sqrt{0.5\cdot 47}$

$V=\sqrt{23.5}$

V = 4.85 V

The maximum voltage that can be applied without damaging the resistor is 4.85 V

6 0

3 years ago

A clock is designed that uses a mass on the end of a spring as a timing mechanism. If the oscillation time needed is exactly one

user100 [1]

Answer:

The value is $k = 51.34 \ N/ m$

Explanation:

From the question we are told that

The mass is $m = 1.3 \ kg$

The needed oscillation time is $T = 1 \ s$

Generally the spring constant is mathematically represented as

$k = \frac{4 \pi^2 * m }{ T^2}$

=> $k = \frac{4* 3.142^2 * 1.3 }{ 1^2}$

=> $k = 51.34 \ N/ m$

5 0

3 years ago

A block of mass M on a horizontal surface is connected to the end of a massless spring of spring constant k. The block is pulled

slamgirl [31]

Answer:

Minimum coefficient of kinetic friction between the surface and the block is $\mu_k=\frac{kx}{2Mg}$ .

Explanation:

Given:

Mass of the block = M

Spring constant = k

Distance pulled = x

According to the question:

<em>We have to find the minimum co-efficient of kinetic friction between the surface and the block that will prevent the block from returning to its equilibrium with non-zero speed. </em>

So,

From the FBD we can say that:

⇒ Normal force, $N=Mg$ <em>...equation(i)</em>

⇒ Elastic potential energy, $PE$ = $\frac{kx^2}{2}$ <em> ...equation (ii)</em>

⇒ Frictional force, $f$ = $\mu_kN$ <em> ...equation (iii)</em>

⇒ Plugging (i) in (iii).

⇒ $f=\mu_kMg$

Now,

⇒ As we know that the energy lost due to friction is equivalent to PE .

⇒ $PE=fx$ <em>...considering PE as</em> $mgh$ or $f(x)$ .

Arranging the equation.

⇒ $\frac{kx^2}{2}=\mu_k Mg (x)$

⇒ $\frac{kx}{2}=\mu_k Mg$ <em>...eliminating x from both sides.</em>

⇒ $\frac{kx}{2Mg}=\mu_k$ <em>...dividing both sides wit Mg.</em>

Minimum coefficient of kinetic friction between the surface and the block is $\frac{kx}{2Mg}=\mu_k$ .

4 0

4 years ago

Melting ice caps can result in _____.

IceJOKER [234]

Melting of ice caps ... causing them to shrink in coverage .. can result in ...

-- wet ground

-- more farming opportunities, but less skiing

-- higher sea level

-- coastal flooding

-- extinction of plant and animal species

-- more icebergs floating around

-- lower average albedo, higher solar absorption, widespread warming

4 0

3 years ago

Read 2 more answers

Determine the minimum amount of energy (in MeV) needed to remove a neutron from a 88Sr nucleus. (For all masses, keep six places

Sindrei [870]

Answer:

11.106 Mev.

Explanation:

Sr⁸⁸ → Sr ⁸⁷ + ₀n¹

87.905612 86.908877 1.008664 ( atomic masses in amu )

mass defect = ( 86.908877 + 1.008664) - 87.905612 = .011929 amu.

Equivalent energy in MeV = .011929 x 931 = 11.106 MeV

6 0

3 years ago