A mirror forms an erect image 40cm from the object and one third its height where must the mirror be situated ​

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)