An arrow (m=0.015 kg) is shot at 91 m/s and sinks 11 cm into a target. (a) Find the force of friction provided by the target. (b) Find the impulse the wood exerts on the bullet. (c) Find the time it takes for the bullet to stop.

Are aliens real? justify you’re answer.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz