Answer:
X and Z
Explanation:
Conduction occurs through direct physical contact. Heat transferred from the pot to the handle, and from the handle to the hand, are both examples of conduction.
False only some eukaryotes have cell wall like plants, fungi, and some bacteria.
I'm not sure. But it can be A or C.
Answer:
Explanation: The equation that relates resistance of tungsten at different temperatures is as follows
R = R₀ [1 + α ∆T] , R₀ is resistance at lower temperature , R is resistance at higher temperature . α is temperature coefficient of resistivity and ∆T is rise in temperature .
Putting the values
170 = 26 [1 + .0045 ∆T]
∆T = 1230.75
lower temperature = 40◦C
higher temperature = 1230 + 40
= 1270◦C
Answer:
Option C. 1.2 m
Explanation:
The following data were obtained from the question:
horizontal velocity (u) = 2.08 m/s
Horizontal distance (s) = 0.96 m
Height (h) of the table =?
Next, we shall determine the time taken for the lab cart to get to the ground. This can be obtained as follow:
horizontal velocity (u) = 2.08 m/s
Horizontal distance (s) = 0.96 m
Time (t) =?
s = ut
0.96 = 2.08 × t
Divide both side by 2.08
t = 0.96 / 2.08
t = 0.5 s
Finally, we shall determine the height of the table as illustrated below:
Time (t) = 0.5 s
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) of the table =?
h = ½gt²
h = ½× 9.8 × 0.5²
h = 4.9 × 0.25
h = 1.2 m
Thus, the height of the table is 1.2 m
