Two solid objects, a and b, are placed in boiling water and allowed to come to temperature there. each is then lifted out and placed in separate beakers containing 1000 g of water at 10.0 ºc. object a increases the water temperature by 3.5 ºc; b increases the water temperature by 2.6 ºc. which has the larger specific heat?

Given:

Mass of object 'a' = Mass of object 'b' = 1000 g

Initial temperature of water T1 = 10 C

Increase in water temperature due to 'a' = 3.5 C

Increase in water temperature due to 'b' = 2.6 C

To determine:

If object 'a' or 'b' has the larger specific heat  

Explanation:

Heat (Q) involved in a chemical reaction is given as-

Q = mcΔT= mc(T2-T1) (1)

where m = mass

c = specific heat

ΔT = change in temperature

Now the specific heat is the amount of heat required to raise the temperature of a unit mass of a substance by 1 C.

c = Q/mΔT

Based on the above equation, for substances of equal masses, lower the ΔT value higher will be the specific heat.

For object a, ΔT = 3.5 C and for object b, ΔT = 2.6 C.

Hence b will have a higher specific heat.

give brainliest

water pollution kills aquatic life. aquatic life includes algae and other plant life that use photosynthesis. photosynthesis takes   c02 out of the air.  

c02is a greenhouse gas.

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.