Tina is waiting at the bus stop. She sees and hears an ambulance as it approaches and passes by her. Which two changes in the loudness of the siren does Tina hear?

What is the total displacement of an ant that walks 2 meters west, 3 meters south, 4 meters east, and 1 meter north?

A force of 50 pounds is directed 30 from the horizontal, find the vector that represents this force.

A world-class cyclist can average about 15.5 m/s on a bike during a sprint. At this rate, how much distance can he cover in an hour?

If the temperature increase, the rate of chemical reaction also increase because the particles start moving faster. If the surface area increase, the rate if chemical reaction also increases because the chances of the collision become more.

Give an everyday example of an action and reaction pair that does produce motion and one that does not.

X-rays UV light waves Sound waves Earthquake waves. All of these have which characteristic in common?

V=345m/s, 7210Hz, X=?

As a mercury atom absorbs a photon of energy, an electron in the atom changes from energy level d to energy level e. Determine the energy of the absorbed photon in electronvolts.

During an exothermic reaction, the energy given off comes from atoms being consumed mass being burned into energy the breaking and forming of bonds mass being created

Can electrostatic attract both pull and pull?