When a sound wave encounters a barrier, what happens?
a. the sound is amplified
b. the sound is muffled
c. the sound dissipates
d. the sound reflects

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant

What is the coefficient of kinetic friction μk between the block and the tabletop?