In lightning , light is seen first and sound is heard later it is due to 1)optical illusion
2) variation in temperature
3) position of observer
4) difference of velocities of light and sound

What must be the same for any two resistors that are connected in series ? a. the potntial diffrence across each b. the rate at which charge moves through each c. the rate at which energy is used by each d. the resistance to the flow of charge of each

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving