Which will speed up a chemical reaction?

A.

Apply heat.

B.

Increase the concentration of the reactants.

C.

Grind up the substance, so there is more surface area.

D.

all of the above

Which coefficient of O2 is needed to balance the equation C3H8 + O2 → 3CO2 + 4H2O? 2 3 5 6

If you are rounding a corner on a bicycle, by twisting the handlebars of your bicycle to the right, which direction does the bicycle wheel precess? Why? Should you lean inward (to the right) or outward (to the left) to counteract this?

A coil of wire with 100. circular turns of radius 8.00 cm is in a uniform magnetic field along the axis of the coil. The resistance is 40.0 O. At what rate, in teslas per second, must the magnetic field be changing to induce a current of 0.

Why is Mars surface temperature so low?

A solenoid has 100 turns per cm and a total resistance of 60 Ω center of the solenoid when it is connected to a 12 volt battery Determine the magnetic field in the 21 A flat c

An object starts from rest at time t = 0.00 s and moves in the + x direction with constant acceleration. The object travels 14.0 m from time t = 1.00 s to time t = 2.00 s. What is the acceleration of the object? a) 5.20 m/s^2 b) 10.4 m/s^2 c) 8.

A box is dragged without acceleration in a straight-line path across a level surface by a force of 13 N. What is the frictional force between the box and the surface?

What is a wormhole, and how is it formed?

Most cells cannot harness heat to perform work because

7 factors that can affect physical fitness