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.

The factors that affect the weight of an object are: which of the following: 1. location on earth 2. mass of the object 3. altitude 4. temperature 5. speed

The sphere that refers to Earths water is called the

Which statements best describe characteristics unique to renewable resources? Check all that apply. Renewable resources are abundant. Renewable resources form slowly. Renewable resources can be used to generate electricity.

In which tool are uranium atoms split to make electricity? A. turbine B. generator C. reactor D. condenser

A block of mass 21 kg slides up a frictionless plane inclined at 13◦ with the horizontal under the influence of a force of 210 N acting parallel to the incline and up the incline. The acceleration of gravity is 9.8 m/s 2.

How to calculate kinetic energy? (physics/physical science)

What's the difference between the offspring of an asexual organism and a sexual organism

The contamination that results from the spread of bacteria from meat to vegetables is called

A rock has a mass of 5 kg on the moon. What is the mass of the rock on the earth

A battery applies 45 volts to a circuit, while an ammeter reads 10 ma. later, the ammeter reading drops to 7 ma. assuming the resistance has not changed, the voltage must have