The energy needed to get a reaction started is the

A. adhesion energy.

B. activation energy.

C. cohesion energy.

D. chemical energy.

What is the acceleration of a 5 kg mass pushed by a 10 n force?

A person walks out of a store with a pillow at the top of an overflowing shopping cart. While walking to the car, the cart's wheel hits a large rock, causing the cart to suddenly stop.

The length of a rectangle is 2 cm more than the width. If the area of the rectangle is 24 cm?, what is the length of the rectangle? 24 cm? O 2 cm О 3 cm 06 cm 8 cm

Where are auroras frequently seen

What are three things that transfer energy by sound

A taxi hurries for 1 3/4 hours with a constant speed of 84 mph and then for another 1 hour 45 minutes with a constant speed of 24 mph. what is its average speed for the total trip?

A carbon atom has how many valence electrons?

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.