Answer:
<h3>The answer is 106.5 g</h3>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume = 15 mL
density = 7.1 g/mL
We have
mass = 7.1 × 15
We have the final answer as
<h3>106.5 g</h3>
Hope this helps you
The amount of heat needed to raise the temperature of a 2kg object from 15°C to 25°C is 34000J.
HOW TO CALCULATE SPECIFIC HEAT CAPACITY:
- The amount of heat absorbed by an object can be calculated by using the following expression:
Where;
- Q = amount of heat absorbed or released (J)
- m = mass of object
- c = specific heat capacity (J/g°C)
- ∆T = change in temperature (°C)
- According to this question, 2 kg object has a specific heat capacity of 1,700J/kg°C and was raised from a temperature of 15 Celsius to 25 Celsius. The heat absorbed is calculated as follows:
- Therefore, the amount of heat needed to raise the temperature of a 2kg object from 15°C to 25°C is 34000J.
Learn more about how to calculate heat absorbed at: brainly.com/question/11194034?referrer=searchResults
From T = 2π√(l/g).
Since the lengths are the same, so that is a constant.
T α 1/√g
So the period T is inversely proportional to the square root of gravity g.
So the one with a bigger gravity g would have a shorter period
and
the one with smaller gravity g would have a longer period.
Therefore the period on the Moon with gravity of 1.63 m/s² would be longer period than that on the Earth with gravity of 9.81 m/s²
Punching a bag is a suitable example of the situation when the force applied to change shape of an object.
