Consider a 1-M Wide Parabolic Trough Reflector with a 1-Cm $20 ^ { \circ } \mathrm { C }$

question 8

Essay

Consider a 1-m wide parabolic trough reflector with a 1-cm inside diameter pipe filled with oil at its focus. If all of the solar radiation is converted into heat, estimate the time required at midday on a sunny day to raise the temperature of the oil from $20 ^ { \circ } \mathrm { C }$ to $100 ^ { \circ } \mathrm { C }$ .

---

Definitions:

Sexually Active

Engaging in sexual activities with one or more partners.

Oral Contraceptives

Medications taken by mouth to prevent pregnancy, containing hormones that inhibit ovulation and alter the uterine lining.

Male Condoms

A barrier form of contraception worn over the penis during sexual activity to prevent pregnancy and reduce the risk of sexually transmitted infections.

Symptothermal

A method of natural family planning that combines the observation of symptoms and body temperature to track fertility.