Question 1

In a circuit, if the current is doubled and the resistance is doubled, by what factor must the voltage have been changed?

V=IR
I=3A
R=25
V=__V

answer choices
A. 4
B. 1/2
C.1/4
D. 2

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

This is one type of line graph in which the independent variable is time plotted on the x axis and the dependent variable, also numerical, is plotted on the y axis.