In a vacuum, two particles have charges of q1 and q2, where q1 = + 4.2C. They are separated by a distance of 0.31 m, and particle 1 experiences an attractive force of 4.5 N. What is the value of q2, with its sign?

Why does changing the shape on an object have no affect on the density of that object?

In general, as the energy of a sound wave increases, A. the sound gets softer and then louder. B. the sound gets louder. C. the sound always remains the same. D. the sound gets softer.

Which term do modern psychologists prefer to use in place of short-term memory? A) accessible memory B) current memory C) hidden memory D) working memory

A rope vibrates every 0.5 sWhat is the frequency of the waves?

How can non visible radiation be used

Which statement best describes the movement of particles when a wave travels through a medium? The particles are

What is the acceleration of all objects due to gravity? What does this mean?

Which is the correct formula for cellular respiration? a. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2 b. CO2 + H2O → C6H12O6 + O2 c. C6H12O6 + O2 → CO2 + H2O d. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP energy

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.

Consider two cars, a 700kg Porsche and a 600kg Honda Civic. The Porsche is speeding along at 40 m/s (mph) and the Civic is going half the speed at 20 m/s.