The detection of physical energy emitted or reflected by physical objects is called

When is acceleration positive, negative, and zero? Calculate the average speed if I walk to class at a speed of 20 meters/minute for the first 2 minutes and run when they start to play 21 savage at a rate of 50 meters/minute for the last 3 minutes.

Identify the Transformations that take place when you use an electric heater. begin with the transformations that take place in a hydroelectric power plant and end with the energy produced by the heater and it's fan

A teacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and pH indicator strips, which measure acidity.

Scientists think that convection currents flow in earth's

A horizontal surface of area 0.321 m2has an electric flux of 123 N. m2/C passing through it at an angle of 25° to the horizontal. If the flux is due to a uniform electric field, calculate the magnitude of the latter.

When will the earths core overheat and explode from the pressure buildup?

Which is the correctly balanced equation for the reaction of rust, Fe2O3, and hydrochloric acid, HCl? Fe2O3 + HCl → FeCl3 + H2O Fe2O3 + 3 HCl → 2 FeCl3 + H2O Fe2O3 + 6 HCl → 2 FeCl3 + 3 H2O Fe2O3 + 3 HCl → 2 FeCl3 + 3 H2O

How many DNA strands could you fit into a milimeter

A screwdriver with a 1-cm shaft and a 4-cm handle is used to tighten a screw. calculate the ideal mechanical advantage.

Plants make food through photosynthesis, a chemical reaction. What are the starting substances of the reaction?