N which one of the following locations can a person hear the echo of a sound?

How much heat is needed to raise the temperature of 6g of water by 20°C?

The probability of an event A occurring is 0.73.

What would happen if a solid temperature increases

In gases heat is transferred by?

What does the radiometric date of a metamorphic rock most likely represents when the rock was?

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.