1. A stationary ship generates a sound signal at the bow and has a receiver system at the stern of the ship 103.0 m away. The signal arriving at the stern traveling directly through the air and the signal reflected from the sea bottom arrive at the sensor at the same time. If the velocity of sound in air is 332.0 m/ s and in water is 1440.0 m/ s, calculate the depth of water below the ship.

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight