You push a heavy a crate and at first it doesnt move, you push harder and it starts to move but you still need to exert some force to keep it moving at a constant velocity, why

After 15 minutes, 30 g of a sample of polonium-218 remain unchanged. If the original sample had a mass of 960 g, what is the half-life of polonium-218? Suppose you want to separate the leaves, acorns, and twigs from a pile of soil.

How many milliliters of c5h8 can be made from 366 ml c5h12

Why do gases act more ideal at lower pressures

Determine the type of reaction: agno3 + cu - - > cu (no3) 2 + ag double displacement single displacement synthesis decomposition

In an experiment, 50 g of each material were placed in a calorimeter with the same starting water volume and temperature. Which is the best interpretation of the chart? Lead has the highest specific heat of the four materials shown.

Electromagnetic forces are the predominant force in holding what subatomic particles together?

When in a compound, the oxidation number of a nonmetal: A). is always fixed and can never be changed B). can only be deduced once all the other oxidation numbers in the equation are totaled C).

Which of the following actions will not increase the rate at which a solid dissolves in a liquid? A. increasing the surface area of a solid B. stirring the solid and the liquid C. increasing the amount of the solid D.

Does the amount of heat absorbed as 1 kg of saturated liquid water boils at 100°C have to be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100°C?

F. Protection of the body from infectious organisms is accomplished by which of these tissues? a) bone; b) muscle; c) nerve; d) blood