How does the presence of a catalyst affect the activation energy of a reaction?

Two people of different masses sit on a seesaw. m1, the mass of person 1, is 93 kg, m2 is 44 kg, d1 = 0.8 m, and d2 = 1.2 m. the mass of the board is negligible. (a) what is the magnitude of the torque about the pivot (location a.

Calculate the longest wavelength visible to the human eye. express the wavelength in nanometers to three significant figures.

If you have a unknown substance with the follow traits, which category of elements would it most likely belong? 1. Brittle 2. Luster 3. Solid at room temperature (STP) options: Metal Metalloid Non-metal There is no way to categorize this substance

A juggler tosses balls vertically to height H. To what height must they be tossed if they are to spend twice as much time in the air?

How can scientists reduce Bias in scientific investigation

Why do different elements emit different colors of light

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?

A large body of air hats has similar properties of a temperature and moisture is a