What best describes the relationship between wavelength and frequency in an electromagnetic wave?

An atom that has fewer neutrons than protons and more electrons than protons is a (n) ion.

A long stairway with a metal handrail runs between the houses of Amelia and her friend Michelle. After getting their parents' permission, the two girls often play near the stairs.

The force exerted by electrically changed objects

When you touch a hot object, a reflex controls your movements. but how do you know the object was hot?

Is science open to change (can scientific therories change) if new evidence is presented

A wave has a wavelength of 50 m and a speed of 200 m/s. What is the frequency of this wave in hertz?

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

Which of the following best describes the earth's average surface temperature for the past 900,000 years? A. a steady warming trend B. fairly steady temperatures until recently C. prolonged periods of cooling and warming D.

A capacitor with initial charge q0 is discharged through a resistor. What multiple of the time constant τ gives the time the capacitor takes to lose (a) the first 1/8-th of its charge (b) 7/8-th of its charge?

A sheet of paper has a mass of 5 grams. The paper is dropped from a high building twice (it reaches terminal speed in both cases), once as a flat paper of area 600 cm2 and once crumpled as a ball of radius 2 cm.