WHAT IS PARALLALOGRAM LAW OF VECTORS ???

EXPLAIN WITH EXAMPLES..
​

Which statement best describes how private industry decides where to spend the money on research and development

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest