An arrow fired horizontally at 27m/s travels 68m horizontally before it hits the ground. From what height was it fired?

A wave with a frequency of 30 Hz has a wavelength of 40.5 m. How fast is the wave traveling?

What is a limitation of the electron cloud model theory that a law about electrons would not have?

Falling rocks from the top of a mountain are what form of energy

What causes an object to move, change direction or change speed? a balanced force an unbalanced force any force exerted on it

Initially, scientists described atoms as the smallest particles of matter. However, smaller particles within atoms were discovered.

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Ten seconds after starting from rest, a car is moving at 40 m/s. what is the car's acceleration in meters per second per second?

A student builds a simple circuit and a magnet under one of the circuit wires. When the switch is closed charges flow int the circuit and the wire moves

Cite an example in which a force is exerted on an object without doing work on the object

Which equation best expresses the first law of thermodynamics, assuming Q is heat, U is internal energy, and W is work? A.ΔW = ΔQ + ΔU B.ΔW = ΔU - ΔQ C.ΔQ = ΔU+W D.ΔU=Q - W