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
This question is health related and seeks to compute the details surrounding a traumatic head injury. See the explanation below.
<h3>What is a traumatic head injury?</h3>
Traumatic brain injury (TBI), a form of acquired brain injury, occurs when a sudden trauma causes damage to the brain.
TBI can result when the head suddenly and violently hits an object, or when an object pierces the skull and enters brain tissue
<h3>What are the details surrounding the head injury?</h3>
Final velocity before hitting the ground
V² = 2g*0.56
V² = 2 * 9.8 * 0.56
V = √10.976
V = 3.312 m/s
*** Note that <em>g</em> which is the acceleration of gravity is about 9.8 meters.
1a) Where there is a hardwood floor
-u^2 = -2as
a = 3.312^2/2*0.0019
a = 1,042.08 m/s^2
1b) Duration
t = u/a
= 3.312/1,042.08
t = 3.18 ms
2a) Where there is a carpet on the floor
a = 3.312^2/2*0.013
a = 713.01 m/s^2
t = u/a
= 3.312/713.01
t = 4.65 ms
Learn more about head trauma at;
brainly.com/question/1445399
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