How long would it take for a car to travel 200 km if it has an average speed of 55 km hr?

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )