The specific heat of the metal, assuming no heat is exchanged with the surroundings is 2140 J/(kg•K).
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Specific heat capacity of the metal</h3>
The specific heat capacity of the metal is determined from the principle of conservation of energy.
energy lost by the metal = energy gained by aluminum + energy gained by water
Q = mcΔθ
where;
- m is mass (kg)
- c is specific heat capacity
- Δθ is change in temperature
0.425c(100 - 40) = 0.1(900)(40 - 15) + 0.5(4186)(40 - 15)
25.5c = 2250 + 52,325
c = 54,575/25.5
c = 2140 J/(kg•K)
Learn more about specific heat capacity here: brainly.com/question/21406849
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Answer: heat energy, sound energy, and mechanical energy only
Explanation: I did the test in got it right.
Answer:
3
Explanation:
Answer is what its supposed to be. lol.
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b.
It is called the atmosphere
Answer:
Friction = 15.80 Newton
Explanation:
given
A pulling force (F) is 70N acting on the block of 10kg (M) which is placed on the ramp which is at an angle of 20° with the horizontal.
Irrespective to the ramp ,Weight of the body acts vertically downward , if we resolve the components of W=Mg as Mgsin20° (along the ramp) and Mgcos20° (perpendicular to the ramp) as shown in the attachment which contains FBD of the block
as given the body is Accelerating with an acceleration (a) of 2 m/ due to the pulling force . As friction always opposes the motion it acts in the backward direction to the pulling force .as shown in the figure attached
By Newton's 2nd Law
Ma = F - MgSin20°-friction
by subtituting the values we get
10(2) = 70 - 10(10)sin20° - friction
friction =70 - 100sin20° -20
friciton = 15.7979N
by rounding of ,
Frictional force is 15.80 Newton