Grade 11 Science practice

What is on the worksheet

1. Resistors of 14 Ω and 46 Ω are connected in parallel. Find the equivalent resistance in Ω as an exact fraction or integer.

2. Resistors of 17 Ω and 37 Ω are connected in parallel. Find the equivalent resistance in Ω as an exact fraction or integer.

3. Lift a 6 kg mass vertically by 12 m. Using g = 10 m/s², find the increase in gravitational potential energy in J.

4. An object of mass 42 kg accelerates at 11 m/s². Find the net force in N.

5. A constant 7 N force acts in the same direction as a 5 m displacement. Find work in J.

6. A perpendicular force of 2184 N acts over 21 m². Find the pressure in Pa.

7. Resistors of 49 Ω and 8 Ω are connected in parallel. Find the equivalent resistance in Ω as an exact fraction or integer.

8. A hypothetical element has isotopes of mass 52 u (10%) and 58 u (90%). Calculate its mean atomic mass in u.

9. Resistors of 50 Ω and 7 Ω are connected in parallel. Find the equivalent resistance in Ω as an exact fraction or integer.

10. A steady DC device operates at 8 V and 2 A. Find power in W.

11. A device transfers 1120 J in 28 s. Find average power in W.

12. Velocity changes from 2 m/s to 47 m/s in 9 s. Find average acceleration in m/s².

13. A 2 kg sample has specific heat 800 J/(kg·°C). Its temperature rises 14°C with no phase change. Find the energy gained in J.

14. An ideal gas occupies 22 L at 360 K. With pressure and amount fixed, find its volume at 720 K in L.

15. A perpendicular force of 1027 N acts over 13 m². Find the pressure in Pa.

16. Velocity changes from 16 m/s to 6 m/s in 5 s. Find average acceleration in m/s².

17. A device receives 6600 J and delivers 4290 J of useful energy. Find its efficiency as a percentage.

18. A periodic wave has frequency 36 Hz and wavelength 10 m. Find its speed in m/s.

19. Lift a 7 kg mass vertically by 8 m. Using g = 10 m/s², find the increase in gravitational potential energy in J.

20. Three ideal resistors of 65 Ω, 70 Ω and 39 Ω are in series. Find total resistance in Ω.