Answer:
a
Explanation:
The most reasonable conclusion of the above phenomenon is that water is a poor conductor of heat. Basically water is an insulator. The heat from surface to the bottom of the beaker will take a lot of time. Moreover, no convection current is formed so, heat might not even reach the bottom surface. Hydrogen bonding also play a vital role in determining the thermal properties of water.
hence option A is correct
Answer: A
Explanation:
Parallel circuit. The source current is three times the current of a single bulb
The mass of one cubic meter of water in kilograms is 1 kg.
This is a conversions case. First, we must determine how many cubic centimeters there are in a cubic meter. We have 1000 of these after conversion.
This essentially indicates that 1000 units of water, each with a volume of one cubic centimeter, would have to combine before we could create a cubic meter of water.
Knowing that one cubic centimeter weighs one gram, 1000 cubic centimeters would weigh 1000 * 1, or 1000g, or one kilogram.
Thus, 1 cubic meters of water will weigh 1 * 1000g = 1000g, or just 1 kg.
Learn more about the Measurement of mass with the help of the given link:
brainly.com/question/13730160
#SPJ4
Answer:
1) 130, 000 J
2) 1 J
Explanation:
1)
Work done is product of force in Newtons and distance in meters
W=Fd
Given an average force of 5,200 N and distance of 25 m then we evaluate that
Work done=5200*25=130, 000 Nm or Joules
2)
Similarly, for the second question, given force of 1N and distace of 1 m then the work done will be
W=1*1=1 J
Answer:
The fourth graph is the answer
Explanation:
We have inequalities
For the first inequality all points at or below the graph of y are solutions, and for the second inequality all the points above the graph of y are the solutions. So, the solution to these inequalities are points that are above the graph of and below the graph of 
. The shaded region in the fourth graph satisfies these conditions.
<em>Looking at other choices, we see that the first two graphs do not even represent the graphs of our inequalities, and the third graph does represent the inequalities but shades the wrong region. </em>
P.S: the graph of the inequality is dashed because 
is "greater than" and not "equal to" 
, so this indicates that the values on the line 
are not included. And the graph of the inequality is a solid line because is "less than or equal to" 
, so we are including the values on the line 
, and that's why it's solid.
