Un corp este aruncat, de la suprafata Pamantului, cu viteza de v1=m/s vertical in sus. La ce inaltime energia sa cinetica va fi egala cu cea potentiala?

Why do electron microscopes have higher resolving power than light microscopes?

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Explain what will happen if decomposers were apsent from a forest ecoysystem.