What happens when you push the button of a doorbell? The current going through the doorbell rapidly switches directions. The electromagnet becomes stronger. The switch is closed. completing the circuit.

Because lightning is electricity, strike victims are not safe to touch after they have been struck. True False

Which of the following exhibit the Tyndall Effect? A laser beam through a soda drink. A flashlight beam through air in a room. Car headlights on a foggy night. A laser beam through salt water.

A scientist makes a measurement and gets a value of 90.6 m The true value is 60.0 m. Calculate the absolute and relative error of the scientist's measurement. Round your answers to a reasonable n number of decimal places.Also be sure your answers include any necessary symbols. absolute error: $\square $ relative error: $\square $

Question 3(Multiple Choice Worth 1 points) (06.09 MC) A clock moves past you at a speed of 0.9 c. How much time passes for you for each second that elapses on the moving clock? 0.436 s 1.15 s 2.29 s Infinity

If the mass of an object is greater, its heat capacity will be: higher lower constant zero

Heat energy is measured in __ a. Fahrenheit b. Celsius c. Amperes d. British thermal units

Substance A, a solid , at $80^{\circ }C$ is put into substance B, a liquid, at $60^{\circ }C$ Which among the following explains the energy change between A and B? A absorbs heat and B releases heat. Both A and B releases heat. A releases heat and B absorbs heat. Both A and B absorb heat.

Which option states the principle behind the law of conservation of mass and the law of conservation of energy? Energy and mass are the properties that scientists measure when studying physical changes and chemical reactions. Energy and mass cannot be created or destroyed during physical changes or chemical reactions. An object's energy and mass have a direct relationship with that object's temperature. An object's energy and mass have an indirect relationship with that object's temperature.

The density of a substance remains the same regardless of the amount of substance present. A True B False

Analyze why lifting an object vertically requires more energy compared to sliding it horizontally on a frictionless surface. Gravity must be overcome vertically Air resistance is greater No force is needed Objects are heavier horizontally