Examiners: F Acheampong & Elmela Date: 30th October, 2015
Pwo7
TA/SBBS 109/15 /B
Index Number:..
4. At what Celsius temperature will the Kelvin scale doubles the Celsius
reading? (2 marks)
5. A body of mass 20 kg falling freely attains a velocity of 9.5 m/s at height of
2.3 m above the ground. Calculate the total energy at that height. (g = 10 m/s)
(3 marks)​

Which of the following quantities are units of momentum? (there could be more than one correct choice.) a)n m b) kg s/m c) kg m/'s d)n-s 12 points] e) kg m2/s2

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

Diamond will scratch quartz. true or false