A group of friends play volleyball near a glassware, one of them hits the ball with an acceleration of 8m/s2 and breaks one of the crystals. If the ball has a mass of 6kg, how hard did the ball hit the crystal? a. 48 N
b. 1.3 N
c. 0.8 N
d. 0.5 N

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Diverging mirrors and lenses always produce images

Auniform electric field exists in the region between two oppositely charged plane parallel plates separated by a distance of 1.60 cm . a proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time interval of 3.20×10-6 s. 1-find the magnitude of the electric field. use 1.60×10-19c for the magnitude of the charge on an electron and 1.67×10-27kg for the mass of a proton 2-find the speed of the proton when it strikes the negatively charged plate