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The four italian interrogative pronouns are:

• Chi (who), it's invariable and refers only to people,singular or plural.
• Che cosa (what) still invariable and refers just to things or co...

In order to find the orbital period of a satellite around earth, you must understand the forces at play in this situation. You must equate the two radial forces acting on the satellite - these are Newton'...

The perfect tense (in french le passé composé) is used to describe completed actions, whereas the imperfect tense (l'imparfait) refers to an event that used to happen, or an action that cannot be describe...

The carbon atoms in diamond make four bonds The carbon atoms in graphite make three bonds Graphite has delocalised electrons which can move through the graphite to carry a charge Diamond does not have del...

• Vaccines contain dead or inactive forms of a pathogen. - These dead or inactive forms stimulate the white blood cells to produce antibodies against the pathogen. - If a person is infected by the pat...