12 (b) The apparatus is then set up as shown in Fig. 1.3.
The rule is at a small angle to the bench.
2
metre rule
hook
zero mark
bench
Fig. 1.3
A student measures the length of the stretched spring and obtains the result
12 = . 4.4 cm.
(i) He then places a metal block X with its centre at the 40.0 cm mark on the rule.
Explain briefly how the student can make sure that the block is in the correct
position. You may wish to use a diagram.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

What occurs during a combustion reaction

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.