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Kipish [7]
3 years ago
10

Suppose a new liquid were discovered that is identical to water in every way except that it has a lower latent heat of fusion. W

ould it take a longer or shorter time to make ice out of this liquid in your freezer?
Physics
1 answer:
Triss [41]3 years ago
8 0

Answer:

lesser time

Explanation:

The latent heat of fusion is defined as the amount of heat required to convert 1 gram of water into 1 gram of ice at constant temperature called melting point.

In this situation only the state of matter is changed, the temperature of the substance remains constant.

A liquid has lower latent heat rather than water, it means it requires lesser amount of heat to fuse it , so it requires lesser amount of time to melt the ice made by this liquid.

So, it requires lesser time.

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A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 3.83 ×
Tju [1.3M]

Answer:

Explanation:

power of a heating element = V² / R where V is voltage and R is resistance

putting in the values

5200 = 75² / R

R = 1.082 ohm

Formula for resistance

R = ρ L / S , ρ is resistivity , L is length and S is cross sectional area

1.082 = 5 x 10⁻⁷ x L / (3.83 x 10⁻⁶)

L = 8.29 m

b )

power of a heating element = V² / R , R is new resistance

5200 = 120² / R

R = 2.77 ohm

R = ρ L / S , ρ is resistivity , L is length and S is cross sectional area

2.77 = 5 x 10⁻⁷ x L / (3.83 x 10⁻⁶)

L = 21.22 m

4 0
3 years ago
Which is the best term to describe a chemical reaction in which the reactants have less potential energy than the products?
bezimeni [28]

Answer:

C.endothermic

Explanation:

chemical reactions

6 0
3 years ago
For the first 5 hours of a trip, a plane averaged 120 kilometers per hour. For the remainder of the trip, the plane travelled an
Marina86 [1]

Answer:

t  all=  30h

Explanation:

In this problem the speed of the plane is constant, so we can use the equations of uniform rectilinear motion, the definition of average speed is the distance traveled between the time taken.

    v = d / t

Let's calculate each distance

First part of the trip

    v₁ = d₁ / t₁

    d₁ = v₁ t₁

    d₁ = 120 t₁

Second part of the trip

    v₂ = d₂ / t₂

    d₂ = v₂ t₂

   d₂ = 180 t₂

Total trip

   v₃ = d₃ / t₃

   d₃ = v₃ t₃

   d₃ = 170 t₃

The total travel distance is the sum of each distance and the total time is the initial time of 5 h plus the time of the second part (t2)

    d₁ + d₂ = 170 t₃

    120 5 + 180 t₂ = 170 (5 + t₂)

Let's solve

   600 + 180 t₂ = 850 +170 t₂

   t₂ (180 -170) = 850 - 600

   10 t₂ = 250

   t₂ = 25 h

Therefore, the total travel time is

   t  all= 5 +25 = 30h

6 0
3 years ago
A hollow ball weighs 40 newtons. In a water tank, it displaces 15 newtons of water. What is the buoyant force on the ball? Will
motikmotik

Answer:

25N

it will float since the water displaced is less than the weight. buoyancy = 25n down

Explanation:

40 newtons - 25 newtons = 25 newtons

4 0
3 years ago
The accompanying map shows the route traveled by a school bus.
Shtirlitz [24]

Answer:

C

Explanation:

6 0
3 years ago
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