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3 years ago

Help when u can! I feel like it's C, but I just want to make sure before I submit the test.

Physics

1 answer:

Marat540 [252]3 years ago

4 0

(D)

Explanation:

This kind of bond where the electrons are transferred is called ionic bond. This bond occurs between a metallic and non-metallic elements. The other kind of bond (covalent) involves the sharing of electrons and this happens between non-metallic elements.

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Suppose 310. grams of ethanol (ethyl alcohol) is in an aluminum cup of 90.0 grams. Both of these are at 30.0C. A mass m of ice a

Ira Lisetskai [31]

Answer:

Explanation:

Given

mass of ethanol $m_e=310\ gm$

mass of aluminium cup $m_{al}=90\ gm$

both are at an initial temperature of $T_i=30^{\circ}C$

specific heat of ethanol $c_e=2.46\ J/g-K$

specific heat of aluminium $c_{al}=0.9\ J/g-K$

specific heat of ice $c_i=2.108\ J/g-K$

specific heat of water $c_w=4.184\ J/g-K$

Latent heat of fusion $L=334\ J/gm$

suppose m is the mass of ice added

Heat loss by Al cup and ethanol after $18^{\circ}C$ is reached

$Q_1=(310\times 2.46+90\times 0.9)\cdot (30-18)$

Heat gained by ice such that ice is melted and reached a temperature of $18^{\circ}C$

$Q_2=m\times 2.108\times (8.5)+m\times 334$

Comparing 1 and 2 we get

$m=23.65\ gm$

Thus 23.65 gm of ice is added

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3 years ago

A student hangs a balloon from a string then rubs it on their hair and releases it. They rub a second balloon on their hair then

REY [17]

Answer:

Explanation:

tha two ballon have acquired similar charges they therefore repel each other

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3 years ago

PLZ PLZ PLZZZZZZZ HELP ASAP!!!

AlladinOne [14]

i belive the answe is c and if im wrong im tarrably sorry

7 0

4 years ago

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A beam is said to be statically determinate if all of its unknown reaction components can be determined by the static equilibriu

BlackZzzverrR [31]

Answer:

The correct option is propped cantilever beam.

Explanation:

A propped cantilever beam along with all the reactions is shown in the attached figure.

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For all the other beams the reactions and the equations are 3 each thus making the system determinate.

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4 years ago

The thick fur of a polar bear is an adaptation that allows the bears to live successfully in its environment

Digiron [165]

this is very true for this situation

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3 years ago

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