Question

the temperature at 12 noon was 10°C above zero. if it decreases at the rate of 2°C per hour until midnight,at what time would the temperature be 8°C below zero?What would be the temperature at midnight.​

Answer 1

Answer:

Parenchyma, in plants, tissue typically composed of living cells that are thin-walled, unspecialized in structure, and therefore adaptable, with differentiation, to various functions. The cells are found in many places throughout plant bodies and, given that they are alive, are actively involved in photosynthesis, secretion, food storage, and other activities of plant life. Parenchyma is one of the three main types of ground, or fundamental, tissue in plants, together with sclerenchyma (dead support tissues with thick walls) and collenchyma (living support tissues with irregular walls)

Step-by-step explanation:

Answer 2

Answer:

The temperature at 12 noon was 10°C above zero i.e. +10°C

Rate of decrease in temperature per hour = 2°C

Number of hours from 12 noon to midnight = 12

∴ Change in temperature in 12 hours

= 12 × (-) = -24°C

∴ Temperature at midnight

= +10°C + (-24°C) = -14°C

Hence, the required temperature at midnight =-14°C

The difference in temperature between + 10°C and -8°C

= +10°C – (-8°C) = +10°C + 8°C = 18°C

Number of hours required =$\frac{ 18°C }{2°C}$9 hours

∴ Time after 9 hours from 12 noon = 9 pm.

Step-by-step explanation: