Aparticular star cluster contains stars all with the same apparent magnitude of +4. near the cluster (and at the same distance from the earth) is a single star with an apparent magnitude of +1. the star's brightness appears to be the same as the collective brightness of the entire cluster.
how many stars are in this cluster?

The variables for this experiment include mass, volume and the materials in the various balls, as well as their densities. in part iii, you will be investigating the questionable baseball. use the drop-down menus to complete the sentences and identify the independent and dependent variables. in part iii, the independent variable, the one that is intentionally manipulated, is . in part iii, the dependent variable, the one that you measure the response in, is

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?