Which statement describes the wave interactions in sound navigation and ranging (SONAR)? Sound is transmitted through the water and diffracted by hard surfaces

Sound is transmitted through the water and reflected by hard surfaces

Sound is diffracted through the water and transmitted by hard surfaces

Sound is diffracted through the water and reflected by hard surfaces

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

What is the final velocity of the initial velocity of 25 and -50?