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faust18 [17]
3 years ago
15

HURRY WILL GIVE BRAINLIESTHow much heat is needed to melt 45.00 g of ice at 0°C if the latent heat of fusion of water is 333.7 J

/g?
a. 288.7 Jb. 378.7 Jc. 14,220 Jd. 15,020 J
Physics
2 answers:
Allisa [31]3 years ago
7 0

D. 15,020 J

heat = 45 x 333.7 j = 15016.5j

Blababa [14]3 years ago
6 0

Answer:

d. 15,020 J

Explanation:

As we know that heat required to change the phase of of ice is given as

Q = mL

here we we know that

m = 45.00 gm

also we know that

Latent heat is L = 333.7 J/g

Now from above formula

Q = 45 \times 333.7

Q = 15020 J

so correct answer will be

d. 15,020 J

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lapo4ka [179]

The velocity of the ball when it strikes the ground, given the data is 21.56 m/s

<h3>Data obtained from the question</h3>

From the question given above, the following data were obtained:

  • Time to reach ground from maximum height (t) = 2.2 s
  • Initial velocity (u) = 0 m/s
  • Acceleration due to gravity (g) = 9.8 m/s²
  • Final velocity (v) =?

<h3>How to determine the velocity when the ball strikes the ground</h3>

The velocity of the ball when it strikes the ground can be obtained as illustrated below:

v = u + gt

v = 0 + (9.8 × 2.2)

v = 0 + 21.56

v = 21.56 m/s

Thus, the velocity of the ball when it strikes the ground is 21.56 m/s

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2 years ago
Which term describes the difference in electrical charge across a membrane? View Available Hint(s) Which term describes the diff
Zinaida [17]

Answer:

Membrane potential

Explanation:

Membrane potential is describes the difference in electrical charge across a membrane.                                                                                                              

The difference in potential between exterior  and  interior of the  biological cell is known as Membrane potential.Generally it is denoted by  millivolts like mV and varies from -80 V to -40 V.

So the answer is Membrane potential

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3 years ago
weegy a 7.5kg block is placed on a table. if its bottom surface area is 0.6m2 , how much pressure does the block exert on the ta
Lesechka [4]

The pressure exerted by the block on the table is given by:

p=\frac{W}{A}

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The weight of the box is: W=mg=(7.5 kg)(9.81 m/s^2)=73.6 N

Substituting into the first equation, we find the pressure:

p=\frac{W}{A}=\frac{73.6 N}{0.6 m^2}=122.7 Pa

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With e in volts per meter and t in seconds. at t = 0, the field is upward. the plate area is 4. 3 × 10-2 m2. for t &gt; 0, what
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The magnitude of the displacement current between the plates is    2.1*10^{-8} A

Given,

A=4.3*10^{-2}  m^{2}

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i_{d}=ϵ_{0}*A*\frac{d}{dt}(4.0*10^{5})-(6.0*10^{4}t)=-ϵ_{0} *A*6.0*10^{4}

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<h3>Current </h3>

An electrical charge carrier flow known as current often involves electrons or atoms lacking in electrons. The capital letter I is frequently used as a symbol for current. Amperes are the common unit and are denoted by the letter A. A coulomb of electrical charge moves past a certain place in one second as one ampere of current does. Franklin current or conventional current are terms used by physicists to describe how current flows from relatively positive to comparatively negative sites. Negatively charged electrons are the most prevalent charge carriers. They move in a somewhat good direction from relatively negative points.

With e in volts per meter and t in seconds. at t = 0, the field is upward. the plate area is 4. 3 × 10-2 m2. for t > 0, what is the magnitude of the displacement current between the plates?

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On a far-away (hypothetical) planet, a student is conducting an experiment to study vertical motion. The student fires a cannon
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Yeah it’s pretty much positive
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