Suppose a sound wave and a light wave have the same frequency. which of the following is true? 1. the light wave has a longer wavelength and has the greater speed. 2. the sound wave has a shorter wavelength and has the greater speed. 3. the sound wave has a longer wavelength and has the greater speed. 4. the sound wave has a longer wavelength and has the slower speed. 5. the light wave has a shorter wavelength and has the greater speed. 6. the light wave has a longer wavelength and has the slower speed. 7. the light wave has a shorter wavelength and has the slower speed

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Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?