The total energy in a closed system remains the same or changes as energy changes forms

A less common type of radioactive particle emitted is the positron. If potassium-38 forms argon-38 by positron emission, the number of a positron is and the charge is

Electric current is ...

A student allows the evaporating dish and the anhydrous salt for a long time on the lab bench. What will happen to the mass of the content of the evaporating dish as it cools and how could this be prevented? G

To test your FHE brother's claims about his car, you accept his offer of a ride about campus. Not wanting to exceed the speed limit, he claims he can only give a taste of the accelerating ability of his car and not the full proof.

What is the uses of echoes?

Technician A says balance shafts are used to counteract vibration created in the engine. Technician B says proper balancing of the engine is important for smooth operation. Which technician is correct?

Is it True or Flase that Materials that poor conductors are poor insulators?

A fish tank with insidd dimensions of 124 cm * 94 cm * 224 cm is filled with water, what is the volume?

In the 1920s what did Edmund hubble notice about the galaxies

A rod of mass M = 154 g and length L = 35 cm can rotate about a hinge at its left end and is initially at rest.