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3 years ago

Please help me .finish this paper

Physics

1 answer:

Evgesh-ka [11]3 years ago

7 0

Solution-1:-

$\boxed{\sf \dfrac{10\times 1000}{60\times 60}}$

Solution:-2

$\boxed{\sf Sodium\:and\:Potassium}$

Solution:-3

$\boxed{\sf 320m}$

Solution:-4

$\boxed{\sf Rough\:tiles\:are\:used\:in\:bathroom}$

Solution:-5

$\boxed{\sf Mg_3N_2}$

Solution:-6

$\boxed{\sf Grapes\:and\:Rambutan}$

Solution:-7

$\boxed{\sf {}^{}_{}N}$

Solution:-8

$\boxed{\sf Galactuse}$

Solution:-9

$\boxed{\sf Y-X}$

Solution:-10

$\boxed{\sf Cell\:wall}$

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4a.) A 0.50 kg water balloon is thrown against a wall at 32 m/s coming to a stop. What was its change in

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Answer:

-16 kg m/s

Explanation:

Momentum is a vector quantity indicating the "amount of motion" in an object.

The change in momentum of an object is given by:

$\Delta p = m(v-u)$

where:

m is the mass of the object

u is its initial velocity

v is its final velocity

For the water balloon in this problem, we have:

m = 0.50 kg is the mass

u = 32 m/s is the initial velocity

v = 0 m/s (since the balloon comes to a stop)

Therefore, the change in momentum is:

$\Delta p=(0.50)(0-32)=-16 kg m/s$

And the negative sign indicates that the direction is opposite to the initial velocity.

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3 years ago

The compound ethylene (C2H4) is represented by this diagram. What statement best describes the arrangement of the atoms in an et

Effectus [21]

Answer: The correct answer is two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.

Explanation:

Ethylene is a compound given by the chemical formula $H_2C=CH_2$ .

The bond present between hydrogen and carbon atoms or carbon and carbon atoms are covalent bonds. A covalent bond is formed by the sharing of electrons between the atoms combining.

A double bond is present between carbon and carbon atoms. So 2 pairs of electrons are shared which means in total of 4 electrons are shared.

Bond present between hydrogen and carbon atoms are single bonds. So, a pair of electrons is shared which means that in total of 2 electrons are shared.

Hence, the correct answer is two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.

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3 years ago

Read 2 more answers

What is the magnitude of the maximum stress that exists at the tip of an internal crack having a radius of curvature of 4.5 × 10

Zepler [3.9K]

This problem asks that we compute the magnitude of the maximum stress that exists at the tip of an internal crack
 sigmam=2*(sigma0)(a/(pt))^(1/2)
sigmam= 2*(180)*(((3.5×10^-2)/(2))/(4.5×10-4))^(1/2)=2245 MPA (325609.7 PSI)

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3 years ago

The black board appears black because:

marishachu [46]

Answer:

I think its C All visible light wavelengths (ROYGBV) are absorbed by the board

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3 years ago

Consider an object on a rotating disk a distance r from its center, held in place on the disk by static friction. Which of the f

SVEN [57.7K]

Answer:

A) False

B) False

C) True

D) True

E) True

Explanation:

A) The formula for tangential speed v in term of angular speed ω and radius of rotation r is

$v = \omega r$

So if the angular speed is constant and 0, the tangential speed is also 0. A) is false

B) False because of the centripetal acceleration:

$a_c = \omega^2 r$

C) True because of the formula for tangential acceleration in term of angular acceleration α is

$a_t = \alpha r$

D) True because same as D), if it has angular acceleration, it would have a tangential acceleration. Also from B) the centripetal acceleration will come with time as soon as angular speed is generated by angular acceleration.

E) True and same explanation as from B)

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3 years ago

Please help me .finish this paper​

Please help me .finish this paper