Nancy needs to do a scientific investigation for her class. she is interested in pottery, plants, and basketball. which of the following questions would be suitable for use in a scientific investigation?

a. what length of time is best to use for the firing of pottery to make it strong?
b. what is the most number of points ever scored in a professional basketball game?
c. how many needles grow on the giant redwoods in california?
d. what color of carnation flowers do people find most attractive?

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

What is the momentum of a 2 kg object moving at 15 meters per second