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dalvyx [7]
3 years ago
8

When solid surfaces slide over each other, the kind of friction that occurs is _ friction

Chemistry
1 answer:
abruzzese [7]3 years ago
6 0

When solid surfaces slide over each other, the kind of friction that occurs is called <u>Sliding Friction.</u>

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The substances below are listed by increasing specific heat capacity value. Starting at 30 Celsius, they absorb 100 kJ of therma
Georgia [21]

Answer:

Silver.

Explanation:

To obtain the right answer to question, let us calculate the change in temperature for each substance assuming they all have the same mass as 100g.

This is illustrated below:

1. For Siver:

Mass (M) = 100g

Specific heat capacity (C) = 0.239J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 0.239)

ΔT = 4184°C

2. For Aluminium:

Mass (M) = 100g

Specific heat capacity (C) = 0.921J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 0.921)

ΔT = 1086°C

3. For Lithium:

Mass (M) = 100g

Specific heat capacity (C) = 3.56J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 3.56 )

ΔT = 281°C

4. For water:

Mass (M) = 100g

Specific heat capacity (C) = 4.184J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 4.184)

ΔT = 239°C

Summary

Temperature change of each substance is given below

1. Silver => 4184°C

2. Aluminum => 1086°C

3. Lithium => 281°C

4. Water => 239°C

From the calculations made above, Silver has the highest rise in temperature.

4 0
4 years ago
Diabetes mellitus is characterized by too much glucose buildup in the blood. In _________________ diabetes, this is because the
ELEN [110]
The best answer is b) yess it’s b try it it’s the best one I’m pretty sure
3 0
3 years ago
What type of reaction is the equation 2NaCl → 2Na +Cl2?
Scrat [10]

Answer:

Synthesis reaction

Explanation:

This is a synthesis reaction. When you combine sodium metal (Na) with chlorine gas (Cl), you form sodium chloride or kosher salt (NaCl).

<em>Hope this explanation helps!</em>

5 0
3 years ago
How much nitrogen-13 would be left after 40 minutes if the sample started at 4g
BlackZzzverrR [31]
<h3>Answer:</h3>

0.248 g

<h3>Explanation:</h3>

<u>We are given;</u>

  • Time as 40 minutes
  • Original amount of N-13

We are required to calculate the amount left after decay.

  • We need to know the half life of N-13 first;
  • Half life of N-13 is 9 minutes 58 seconds (9.965 minutes0

We are going to use the formula;

  • Remaining amount = Original amount × 0.5^n

That is; N = N₀ ×  0.5^n , where n is the number of half lives.

n = 40 minutes ÷ 9.965 minutes

  = 4.014

Therefore;

N = 4 g × 0.5^4.014

 = 0.248 g

Therefore, the mass of Nitrogen-13 that will be left is 0.248 g

3 0
3 years ago
Help PLEASE :D
maksim [4K]

Answer:

A) As the phase changes occur, the freedom of motion of the particles increases.

Explanation:

As the phase changes occur, the freedom of motion of the particles increases.

6 0
4 years ago
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