A dolphin emits ultrasound of 100kHz and uses the timings of reflection to determine the position of objects in the water. What is the wavelengths of this ultrasound? Note the speed of sound in water is 1480m/s.

A person rides a Ferris wheel that turns with constant angular velocity. Her weight is 549.0 N. At the top of the ride her apparent weight is 1.500 N different from her true weight. What is her apparent weight at the top of the ride?

What term describes the resistance that one encounters when moving over another

What does local acceleration mean?

How does space research and exploration affect Florida's economy? A) Launches of satellites discourage private industry. B) Tourism has increased because of space activities, which brings more money to Florida's economy.

Stored energy due to the interactions between objects

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?

Why does a buoyant force act on every object in a fluid? Pressure pushing up on the bottom of the object is greater than the pressure pushing down on the top.