Afarmer wants to harvest more than two varieties of crops at a times from his field . he has no idea about the modern methods of agricultural practices. conduct brief research on modern method of agricultural practices and its advantages and suggest him to get the desired result.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

An object in mechanical equilibrium is an object