- 3. If the 3rd harmonic has a frequency of 415 Hz and the wire has a length of 120 cm, determine the number of nodes , antinodes , standing waves , wavelength, and the speed of the wave.
- __ 5. Which of the following would require the least amount of heat to raise its temperature by 20^circ C A. 400gof motor oil B. 400gof sand C. 400gof water D. 400gof iron
- __ 4. A beaker has 100 g of water.The amount of energy needed to raise the temperature of the water 5^circ C is approximately A 420J/gcdot ^circ C B 210J/gcdot ^circ C C. 2100J/gcdot ^circ C D 1000J/gcdot ^circ C
- 9. Complete each statement with the words reflect(s), absorb(s . or transmit(s). a) An opaque object's colour is determined by the colours that it __ and __ b) When a transparent object has a certain colour, it __ and __ that colour and __ all other colours.
- You boil one pot of water for vegetables on a stove and another pot of water for noodles. The pot for noodles contains twice as much water as the pot for vegetables. If the burners release exactly the same amount of heat.which of the following statements is false? A. The specific heat capacity of the water for the vegetables will be half of the specific heat capacity of the water for the noodles. B. The water for the noodles will take twice as long to boil. C. The burner the water for noodles is on will need to release twice as much energy as the burner with the water for the vegetables. D. The water for the noodles will need twice the energy to boil as the water for vegetables.
