Interference of light waves

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

Calculate the enthalpy change for the reaction P4O6(s) + 2O2(g) → P4O10(s)given the following enthalpies of reactionP4(s) + 3O2(g) → P4O6(s) , △H = -1640.1 kJP4(s) + 5O2(g) → P4O10(s) , △H = -2940.1 kJ

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Which one of the following improper integrals are convergent? I.

A 5.0 kg crate is on an inclined ramp that makes an angle of 30. degrees with the horizontal.  If the coefficient of static friction is 0.50, what is the minimum force needed to hold the crate at rest?

If the slope on a position vs time graph is a straight, horizontal line, the object is

A rock is dropped off of a tall bridge.  The rock takes 4.05 s to reach the water below.  What is the height of the bridge (ignore air resistance)?

A river flows north to south with a speed of [v1] m/s.  If a kayak is propelled due east across this river at a speed of [v2] m/s, and the river is [d] m wide, how far downstream will the kayaker land with respect to their original position on the west bank of the river, in meters?

A sled slides down a hill at constant velocity.  This allows us to conclude