When did abundant fossil evidence first appear in geologic record?

A steel piano string of mass per unit lenght 4*10-⁴kgm-¹ was struck, if the speed of the sound on the string is 300ms-¹. Calculate the tension ...

You want to apply 18 N ⋅ m of torque to tighten a nut, using a wrench with a length of either 0.400 m, 0.600 m, or 0.900 m.

This solution of AgCl is used to dissolve several salts. Which salt will be most soluble in this solution given that all conditions are held at the same temperature and pressure?

Give an example of a situation when it would be appropriate to round a number and a situation in which it would not be appropriate to round a number. Explain the difference in the situations.

Why do water and table salt have very different properties?

Inside a stereo speaker, you will find two permanent magnets: one on the cone and one near the cone. True of false?

When a hurricane nears land what causes the most damage

Calculate if an electric hair dryer uses 2,400 j of energy in 2 s, what is its power?

Which of the following choices best represents a potential stressor?

How do you distinguish between speed, velocity, and acceleration?