Answer:
266 g or 0.266 kg
Explanation:
The formula for specific heat capacity is given as,
Q = cm(t₂-t₁) ..................... Equation 1
Where Q = Heat Energy, c = specific heat capacity of Aluminum, m = mass of the aluminum fins, t₁ = initial temperature, t₂ = final temperature.
make m the subject of the equation,
m = Q/c(t₂-t₁)................... Equation 2
Given : Q = 2571 J, c = 0.897 J/g.°C, t₁ = 15.73 °C, t₂ = 26.50 °C.
Substitute into equation 2
m = 2571/[0.897×(26.5-15.73)]
m = 2571/9.661
m = 266 g or 0.266 kg
Hence the mass of the Aluminum fins = 266 g or 0.266 kg
Answer:
see explanation
Explanation:
There is an increasing demand for materials and natural resources from a growing global population, especially those in more economically developed countries. The world's resources are being used up more quickly. The consumption of resources is spread unequally between MEDCs (more economically developed countries), who use more resources, and LEDCs (less economically developed countries), who use less.
The gap between the rich and poor is more evident when the resources are shared so unevenly and unfairly and natural resources like materials and natural energy cannot reach the demand of the people which can have consequences and be very difficult to manage. Having a lack of these materials in a country can result in prices going up for them, and the industry could be harder to work in because of a lack of materials.
Answer:
0.54 sec.
Explanation:
The Speed: <u>2.4 m/seconds</u>
The Distance: <u>1.3 m</u>
So time = Distance/Speed
Time = <u>1.3 / 2.4</u>
THE ANSWER WILL BE 0.54 seconds.
I believe it is A, if I am remembering correctly from my last semester class.
Answer:
213.5 kJ
Explanation:
Mechanical energy= kinetic energy + potential energy= KE+PE=
where m is the mass of rock climber, v is the velocity, g is acceleration due to gravity and h is the height.
By substitution where 68 Kg is m, 320 m is h, 1.5 m/s is v and 9.81 is g then
Mechanical energy=
