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2 years ago

12

What happens to temperature as a substance melts and heat energy is used to break the connections between molecules, until all m

elting is complete? increases steadily decreases steadily stays the same

1 answer:

zaharov [31]2 years ago

3 0

Answer:

Stays the same.

Explanation:

The temperature does not change just because something melts.

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3. A 40-gram ball of clay is dropped from a height, h, above a cup which is attached to a spring of spring force constant, k, of

zheka24 [161]

Answer:

the maximum speed of the ball is 12.65 m/s

Explanation:

Given;

mass of the ball, m = 40 g = 0.04 kg

spring constant, k = 25 N/m

Apply the principle of conservation of energy;

The Elastic potential energy of the spring will be converted into Kinetic of the ball;

$\frac{1}{2} kx^2 = \frac{1}{2} mv^2\\\\ kx^2 = mv^2\\\\v^2 = \frac{kx^2}{m} \\\\v = \sqrt{\frac{kx^2}{m}} \\\\v = \sqrt{\frac{(25)(0.506)^2}{0.04}} \\\\v = \sqrt{160.0225} \\\\v = 12.65 \ m/s$

Therefore, the maximum speed of the ball is 12.65 m/s

4 0

2 years ago

An example of an insulator is

Blizzard [7]

A, most non metals are insulators

5 0

2 years ago

Wts the average velocity

Alexeev081 [22]

Answer:

2.11 m/s

Explanation:

V=disp/time

V=(0.52m+3.7m)/(2)

V=4.22/2

V=2.11 m/s

5 0

3 years ago

What is the difference between living, nonliving, and dead

Natasha2012 [34]

Answer:

Living means something which biologically active, and can function naturally.

Non loving is something which cannot function naturally and biologically.

Dead is something that was living for a certain period, but now it doesn't.

8 0

2 years ago

39 liters of water at

Harman [31]

Answer:

Temperature of the mixture=8 °C

Explanation:

Let, Temperature of the mixture=t °C

Q₁ = Q₂

=> m₁SΔΘ₁ = m₂SΔΘ₂

=> 39 × (20+t) = 21 × (60-t)

∴ t = 8 °C

hope you have understood this

pls mark it as the brainliest

3 0

3 years ago