Just took that test the answer is perpendicular to the wave motion
Answer:
The correct answer is - option A. The mashed potatoes will transfer heat into the gravy.
Explanation:
In this case, where Yamel heats the mashed potatoes but forgets to heat the gravy and put the cold gravy on the hot mashed potatoes. Heat always transfers from the high-temperature object to the low-temperature object. So the hot mashed potatoes will transfer the heat to the gravy according to option A. Cold is not a form of heat but the condition of absence of heat or very low temperature.
Thus, the correct answer is - option A. The mashed potatoes will transfer heat into the gravy.
Answer:
<em>1.2 cm</em>
Explanation:
<u>Thermal Expansion</u>
It's the tendency that materials have to change its size and/or shape under changes of temperature. It can be in one (linear), two (surface) or three (volume) dimensions.
The formula to compute the expansion of a material under a change of temperature from to is given by.
Where Lo is the initial length and is the linear temperature expansion coefficient, which value is specific for each material. The data provided in the problem is as follows:
Computing the expansion we have
The expansion gap should be approximately 1.2 cm
Answer: AD < BD < AC< AB
Explanation:-
Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself.
Lower is the electronegativity diffrence, more will be the covalent character. Higher is the electronegativity diffrence, more will be the ionic character.
1. AB: Electronegativity difference = electronegativity of A - electronegativity of B = 3.8-3.3= 0.5
2. AD: Electronegativity difference = electronegativity of A - electronegativity of D= 3.8-1.3= 2.5
3. BD: Electronegativity difference = electronegativity of B - electronegativity of D= 3.3-1.3= 2.0
4. AC: Electronegativity difference = electronegativity of A - electronegativity of C= 3.8-2.8= 1.0
Thus the order of increasing covalent character is AD < BD < AC< AB.