3. What is the unit for velocity?
6. 1.74x10**6 m is the mean radius of the ________.
8. What is the unit for power?
10. What is the unit for charge?
11. What is the unit for voltage?
12. What has the same mass of a neutron?
13. What is the unit for force?
15. What is the unit for displacement?
18. What is the unit for work?
19. What is the unit for current?
20. What is the unit for time?
21. 8,99x10**9 N.m**2/c**2is the value of _________ constant.
22. What is the unit for frequency?