All objects are either <u>charged</u> or <u>uncharged</u><u>.</u> Charged objects can have a <u>positive</u> or <u>negative</u> charge. Uncharged objects will have a <u>no</u> charge. Charged objects that have the same charges will <u>repel</u> each other. Charged objects with opposite charges will <u>a</u><u>t</u><u>t</u><u>r</u><u>a</u><u>c</u><u>t</u> each other. Uncharged objects can become <u>charged</u><u>.</u> The charge an object has gives it <u>electric</u> energy. The charged object’s ability to attract (pull) or repel (push) other objects is called <u>electrostatic</u> force.
Air pollution level is higher in Location B, because poisonous fumes are produced when coal burns.
Answer:
Newton's first law
Explanation:
Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. Therefore, when the ice is smooth, friction gets lesser, and the force acted on that Puck will be decreased.
Answer:
Person B has four times the power output of person A.
Answer:
a)
b)
c) 0 J/K
d)S= 61.53 J/K
Explanation:
Given that
T₁ = 745 K
T₂ = 101 K
Q= 7190 J
a)
The entropy change of reservoir 745 K
Negative sign because heat is leaving.
b)
The entropy change of reservoir 101 K
c)
The entropy change of the rod will be zero.
d)
The entropy change of the system
S= S₁ + S₂
S = 71.18 - 9.65 J/K
S= 61.53 J/K
