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4 years ago

13

You are given two temperatures for substance: one is the melting point and one is the boiling point. How do you determine which

is which?

1 answer:

Sergio039 [100]4 years ago

8 0

melting point is where the substance is melting and turning from a solid to a liquid.

boiling point is where molecules vibrate and produce energy which makes the water hot and becomes a boil.

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kakasveta [241]

Answer:

A

Explanation:

As the interest rate goes up, your payments and the total repayment amount could increase. On the other hand, if the interest rate happens to drop, you may save money overall and pay less.

4 0

4 years ago

Two objects made of the same material are heated to 60 oC and 90 oC. According to

nlexa [21]

Assuming that there is in a vacuum, the two object will cool at the same rate, because the objects are made of the same material they will have the same cooling rate, assuming the surrounding temperature is the same.

4 0

3 years ago

Read 2 more answers

4800 g to kg? With the work pls

Zigmanuir [339]

Answer:

[See Below]

Explanation:

✦ Formula = $Mass / 1000$

✧ $4800 / 1000 = 4.8$

So $4800$ grams is equal to $4.8$ kilograms.

~<em>Hope this helps Mate. If you need anything feel free to message me. </em>

3 0

4 years ago

A storm cloud has a charge of 0.055 C. Due to polarization, the top of a tree gains a charge of -0.006 C. The cloud moves to 98

Anastasy [175]

Answer:

F = 309.24 N

Explanation:

Given that,

Charge on a strom cloud, q₁ = 0.055 C

The charge gained by the top of a tree, q₂ = -0.006 C

The cloud moves to 98 meters above the tree.

We need to find the amount of force between the cloud and the tree. The electrical force between two charges is given by :

$F=\dfrac{kq_1q_2}{r^2}\\\\F=\dfrac{9\times 10^9\times 0.055\times 0.006 }{(98)^2}\\\\F=309.24\ N$

So, the force between the cloud and the tree is equal to 309.24 N.

5 0

3 years ago

An athlete can twirl a baton so that it reaches an angular velocity of 12 rad/s from rest in 0.5 s. If the length of a uniform b

NikAS [45]

Answer:

The torque needed is 46.08 Nm

Explanation:

Given;

angular velocity, ω = 12 rad/s

time of motion, t = 0.5 s

length of the baton, r = 0.8 m

mass of the baton, 0.5 kg

The torque needed to reach the angular velocity is given by;

τ = F x r

where;

F is the centripetal force of the baton

r is the length of the baton = radius of the circular motion of the baton

$F_c =ma_c= \frac{mv^2}{r} = m\omega^2 r$

Torque is given by;

$\tau = F_c *r\\\\\tau = m \omega^2 r *r\\\\\tau = m \omega^2 r^2 \\\\\tau = (0.5)(12)^2(0.8)^2\\\\\tau = 46.08 \ N m$

Therefore, the torque needed is 46.08 Nm

6 0

3 years ago