Answer: D) geothermal energy Explanation: Based on conventionality in deriving energy, energy sources could be classified as   Conventional :: coal, oil, hydro, nuclear, etc... sources which can be used up or exhaustible. (and) Non - conventional :: solar, wind, tidal, geothermal, biogas, etc... sources which are not exhausted.   Among the given options, Geothermal energy is the alternative energy source among all the choices that are given in the question, that is exhaustible.

Answer: A) 80 Explanation: Let marks obtained by N = x M's marks = 0.80x L's marks = 1.25 (0.80x) K's marks = (0.90) (1.25) (0.80x) = 0.9x But 0.9x = 360 ⇒ x = 400 Percentage of Marks obtained by N = 400 x 100/500 = 80%

Answer: C) 60 kmph Explanation: Average speed = Total distance / Total time. Total distance traveled by Joel = Distance covered in the first 3 hours + Distance covered in the next 5 hours. Distance covered in the first 3 hours = 3 x 60 = 180 milesDistance covered in the next 5 hours = 5 x 24 = 120 miles Therefore, total distance traveled = 180 + 120 = 300 miles. Total time taken = 3 + 5 = 8 hours. Average speed = 300/8 = 37.5 mph. we know that 1 mile = 1.6 kms => 37.5 miles = 37.5 x 1.6 = 60 kms Average speed in Kmph = 60 kmph.

Answer: C) Joules Explanation: Energy is measured in units called Joules.   Joule is unit of work or energy in the International System of Units (SI) which is equal to the work done by a force of one newton acting through one metre.   1 Joule  =  107 ergs or 0.7377 foot-pounds.

Answer: D) Both A & B Explanation:

Answer: B) 100 Explanation: Given  4 45 of 259.99 = ? % of 1247.9 24/5 x 260 = ? x 1248/100 ? = 1248 x 100/1248 ? = 100.

Answer: B) -1 Explanation: Given 5x - 6 = 3x - 8 5x - 3x = -8 + 6 2x = -2 => x = -1.

Answer: A) the location of the load Explanation: