As a musician, you are in the beginning stages of designing a soundproof studio to record your music. Your task is to select a material to line the walls so you have the least amount of echo. Which of the following materials would you choose?
O A Foam because the sound waves will reflect back into the studio.
OB Foam because the sound waves will be absorbed into the foam.
OC Wood because the sound waves will reflect back into the studio as it hits the hard surface.
OD Wood because the sound waves will be absorbed as they hit the hard surface.

Asuppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical