Which force is sometimes attractive and has an infinite range?

Calculate the kinetic energy of a 4 kg object traveling at 16 m/s

Two students are discussing the Sun. Which student is correct? Student 1: Nuclear fusion powers the Sun, so activity like sunspots and flares must be caused by a change in the fusion rate or the type of fusion.

In a Do‑Nothing Machine, two sliders are confined to perpendicular channels and are connected by a rod. The rod can be rotated, causing the sliders to move back and forth in their respective channels.

What is a rule for determining the mass number of an atom or ion?

Which of the following is an example of a. Situation in which an egg is receiving thermal energy through convection A-the egg is kept warm by its mother in the nest B-an egg is cracked on a hot sidewalk and starts to cook C-the egg is cooked in a

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form

The courtroom role that possesses the most discretion is?