How long will it be before 82.0

% of an isotope with a half life of 1250

y decays?

Can i study physics in an engineering university

A 4-W night-light is plugged into a 120-V circuit and oper - ates continuously for 1 year. Find the following: (a) the current it draws, (b) the resistance of its filament, (c) the energy consumed in a year.

What is the sharpness of the light and the amount of voltage when you put the magnet through the lower number of coils first vs the higher number of coils

Describe potential and kinetic energy. Describe how energy is transferred between the two types. Also, describe where there is the most potential and kinetic energy in a roller coaster.

Alternating current is normally produced by a

Darna rolls the 7.05-kg ball down the lane and it hits the 1.52-kg pin head on. The ball was moving at 8.24 m/s before the collision. The pin went flying forward at 13.2 m/s. Determine the post-collision speed of the ball.

What is the acceleration caused by your push on the ball

In the chemical reaction in which carbon, hydrogen and oxygen absorb heat and combine to form carbon dioxide and water which of the following is considered to be a reactant? A. heat B. water C. oxygen D. carbon dioxide

A box is at rest on a table. What can you say about the forces acting on the box? The upward ___ and the downward___ are balanced Applied force Frictional force Normal force Drag force Gravitational force Tension

When the sun warms the sidewalk on a hot sunny day, what type of energy conversion occurs?