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Ronch [10]
3 years ago
11

3. An atom has 11 protons in the nucleus. What is the atomic number? What is the name of this

Physics
1 answer:
jenyasd209 [6]3 years ago
7 0

Answer:

11

Explanation:

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A certain heat engine takes in 300 J of energy from a hot source and then transfers 200 J of that energy to a colder object. Wha
Greeley [361]

Answer:

The efficiency is 0.33, or 33%.

Explanation:

From the thermodynamics equations, we know that the formula for the efficiency of a heat engine is:

\eta=1-\frac{Q_2}{Q_1}

Where η is the efficiency of the engine, Q_1 is the heat energy taken from the hot source and Q_2 is the heat energy given to the cold object. So, plugging the given values in the formula, we obtain:

\eta=1-\frac{200J}{300J}=0.33

This means that the efficiency of the heat engine is 0.33, or 33% (The efficiency of an engine is dimensionless).

5 0
3 years ago
What characteristics of a force can be measured?
Helga [31]
Direction and Strength can be measured of force 
6 0
3 years ago
A. Draw four rays parallel to the optical axis of your mirror. Two above the optic axis and two below it.
Katen [24]

Answer:

   f = q

Explanation:

In the attachment we can see a diagram of the parallel rays.

The dotted line represents the normal to the mirror surface

These rays when reflected using the constructor equation

        \frac{1}{f} = \frac{1}{p} + \frac{1}{q}

where p and q are the distance to the object and the image respectively.

Since the rays are parallel P = inf

          1 / f = 1 / inf + 1 / q

          f = q

this means that all the rays focus on one focal point.

6 0
3 years ago
Note: Use g=9.8 N/kg in this assignment.
Karolina [17]

Answer:

16.12

thistle seed oil benefits to be deposited on your way

5 0
2 years ago
Which one of the following si units is used to measure current?
kondaur [170]
The unit of electric current is the 'ampere'. 

That's the current in the circuit when one coulomb of charge
flows past any fixed point every second.
6 0
3 years ago
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