Answer:
D
Explanation:
- The rate of the Diels-Alder is orders of magnitude faster if there is an electron-withdrawing group on the dienophile. For example, replacing a hydrogen on ethene with the electron-withdrawing group CN results in about a 10^5 increase in the reaction rate.
- Other common electron withdrawing functional groups that will accelerate the Diels Alder reaction of dienophiles include aldehydes, ketones, and esters.
- In short, any functional group conjugated with the pi bond which can act as a pi acceptor will accelerate a Diels-Alder reaction with a typical diene.
- See attachment for graphical explanation.
Answer:
F = 755 N and h = 10.0 m and a = 9.8 m/s 2 and m=? and v = ?
Present day earth is in the Cenozoic era and the time period for it is 66 million years ago to today.
Answer:
Kindly check explanation
Explanation:
Given the following :
Distance between Ranjan and Gomez house = 9km
Start time = 6'o clock
Time he arrived at Gomes house = 7'o clock
Time used for chatting during this period = 5 minutes
Distance covered in 40minutes = 6km
Time spend for second part of the journey = (60 - (40 + 5))minutes = 15 minutes = 15/60 = 0.25 hoir
Distance covered during second part of journey = 9 - 6 = 3 km
Speed = distance / time
Speed = 3km / 0.25 hr = 12km/hr
Average speed for entire journey :
First part :
Speed = distance / time
Time = 40 minutes = (40/60) = 0.667 hour
Speed = 6km / 0.667 hour = 9km / hr
Average speed :
(First part + second part) / 2
(9km/hr + 12km/hr) / 2 = 21km/hr / 2 = 10.5 km/hr
= 10.5km/hr
Answer:
F' = 112.5 N
Explanation:
The force of gravitation between two objects is given by Newton's Law of Gravitation as follows:
______________ equation (1)
where,
F = Force = 50 N
G = universal gravitational constant
m₁ = mass of the first object
m₂ = mass of the second object
r = distance between objects
Now, the masses of each object are tripled and the distance between them is doubled:
m₁' = 3m₁
m₂' = 3m₂
r' = 2r
Hence, the new force will be:
using equation (1), we get:
F' = 2.25 F = 2.25(50 N)
<u>F' = 112.5 N</u>
