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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
The answer is ”D”, “a higher frequency and a shorter wavelength.
Answer:
5.74s
Explanation:
We can first solve for the initial angular velocity using the following formula
Where 
is the final angular velocity, 
is the angular acceleration and 
is the angular displacement
So for the wheel to get from 22.4 to -22.4 with angular acceleration of -7.8 then the time it takes must be
