The metal conducts the heat and through conduction, cooks the brownies; conduction also cooks the brownies in the glass pan, but since infrared goes right through the glass, they also cook by radiation.
The answer is D; Mercury-194
All of the others are not when I looked them up
<span>Metals have low ionization energy and nonmetals have high electronegativity, so electrons transfer easily from the metal atom to the nonmetal atom.</span>
Answer:
a) 250 N
b) 50 N
c) 5000 J
d) 4
e) 3.33
Explanation:
Given that weight of piano (
) = 1000 N, distance moved by pulley (
) = 5 m and the rope used (
) =20 m
a) The effort applied (
) if it was an ideal machine is:
b) If the actual effort = 300 N
The force to overcome friction = actual effort - = 300 - 250 = 50 N
c) Work output = 
d) ideal mechanical advantage (IMA) = 
e) Input force = 300 N, Therefore:
actual mechanical advantage = / input force = 1000 / 300 = 3.33
The control group in this experiment is the one with just distilled water. It is plain so they can use it to compare the other tests against.
