When two forces or more forces act on an object, the forces are

Scientists used to believe that the earth was the center of the universe. which invention was primarily responsible for obtaining evidence against this? a. sextant b. astrolabe c. hubble telescope d. optical telescope

How much heat is needed to rise the temperature of 72g of water by 80^c?

Desert sand is very hot in the day and very cool at night. what does this indicate about its specific heat capacity?

Heat is flowing through a slab of material by conduction heat transfer; and the heat flux is 16500W/m^2. If the slab is 3.0 cm thick and the thermal conductivity is 18 W / (m K), what is the temperature difference across the slab?

How can you make a magnet that turns on and off

Determine which factors will increase the reaction rate and which factors will decrease te reaction rate.

Read the paragraph below from the section "An Object At Rest Has Potential Energy Potential energy is the energy an object rgy is the energy an object has because of its position. It is energy that is waiting to be released.

Briefly describe the history of the metric system as it applies to the meter and how the definition of a meter has changed over time.

Visible light is an example of?

What were the discoveries of astronomers like Copernicus and Galileo?