What is something a that a vacuum tube cannot do?

a. change alternating current into direct current
b. increase the strength of a signal
c. convert electrical energy into thermal energy
d. turn a current on or off

Print "usernum1 is negative." if usernum1 is less than 0. end with newline. convert usernum2 to 0 if usernum2 is greater than 10. otherwise, print "usernum2 is less than or equal to 10.". end with newline

The salespeople at hyperactive media sales all use laptop computers so they can take data with them on the road. you are a salesperson for superduper lightspeed computers talking to hyperactive media sales about upgrading the laptops to windows 10. explain how network location awareness in windows 10 would make the laptops more secure.

Idon’t understand the double8 coding problem. it is java