Temperature and Pressure Conversion Mastery

1. Convert 25 °C to K (approx):

25 K

248 K

298 K

325 K

Concept: °C to K offset. K = °C + 273 (more precisely 273.15). So 25 °C is about 298 K.

Explanation

Concept: °C to K offset. K = °C + 273 (more precisely 273.15). So 25 °C is about 298 K.

2. Convert 293 K to °C (approx):

20 °C

293 °C

566 °C

Concept: K to °C. Subtract about 273. 293 − 273 = 20 °C.

Explanation

Concept: K to °C. Subtract about 273. 293 − 273 = 20 °C.

3. A temperature difference of 20 °C is the same as a difference of 20 K.

True

False

Concept: Temperature differences. Kelvin and Celsius have the same step size. Offsets cancel when you take differences.

Explanation

Concept: Temperature differences. Kelvin and Celsius have the same step size. Offsets cancel when you take differences.

4. Kelvin is an SI base unit, while Celsius is derived from Kelvin with an offset.

True

False

Concept: SI temperature unit. Kelvin is the base unit in SI definitions. Celsius is tied to Kelvin by a fixed offset.

Explanation

Concept: SI temperature unit. Kelvin is the base unit in SI definitions. Celsius is tied to Kelvin by a fixed offset.

5. −10 °C is about 263 K.

True

False

Concept: Negative Celsius conversion. Add 273 to convert: −10 + 273 = 263 K. Negative Celsius is still positive Kelvin.

Explanation

Concept: Negative Celsius conversion. Add 273 to convert: −10 + 273 = 263 K. Negative Celsius is still positive Kelvin.

6. Convert 101,000 Pa to kPa (approx):

10.1 kPa

101 kPa

1010 kPa

0.101 kPa

Concept: Pa to kPa. Divide by 1000. 101,000 Pa becomes about 101 kPa.

Explanation

Concept: Pa to kPa. Divide by 1000. 101,000 Pa becomes about 101 kPa.

7. 1 bar is not an SI unit, but it is often used for pressure.

True

False

Concept: Non-SI units in practice. Bar is widely used in engineering and meteorology. SI prefers pascals, but bar is common for convenience.

Explanation

Concept: Non-SI units in practice. Bar is widely used in engineering and meteorology. SI prefers pascals, but bar is common for convenience.

8. Convert 0.35 MPa to kPa:

0.35 kPa

3.5 kPa

350 kPa

3500 kPa

Concept: MPa to kPa. 1 MPa = 1000 kPa. So 0.35 × 1000 = 350 kPa.

Explanation

Concept: MPa to kPa. 1 MPa = 1000 kPa. So 0.35 × 1000 = 350 kPa.

9. 200 kPa equals 0.2 MPa.

True

False

Concept: Converting kPa to MPa. 1 MPa = 1000 kPa. So 200 kPa ÷ 1000 = 0.2 MPa.

Explanation

Concept: Converting kPa to MPa. 1 MPa = 1000 kPa. So 200 kPa ÷ 1000 = 0.2 MPa.

10. 1 MPa equals:

10³ Pa

10⁵ Pa

10⁶ Pa

10⁹ Pa

Concept: Mega- prefix. Mega- is 10⁶, so MPa is a million pascals. This is a common unit for material stresses.

Explanation

Concept: Mega- prefix. Mega- is 10⁶, so MPa is a million pascals. This is a common unit for material stresses.

11. 0 °C is approximately 273 K.

True

False

Concept: Reference point. The freezing point of water is 0 °C, which corresponds to about 273 K. This anchor helps many conversions.

Explanation

Concept: Reference point. The freezing point of water is 0 °C, which corresponds to about 273 K. This anchor helps many conversions.

Submit

13. Convert 5 °C to K (approx):

5 K

268 K

278 K

305 K

Concept: °C to K. Add about 273. 5 + 273 = 278 K.

Explanation

Concept: °C to K. Add about 273. 5 + 273 = 278 K.

14. Convert 310 K to °C (approx):

37 °C

310 °C

583 °C

Concept: K to °C. °C ≈ K − 273. 310 − 273 = 37 °C.

Explanation

Concept: K to °C. °C ≈ K − 273. 310 − 273 = 37 °C.

15. Convert 2.5 bar to Pa (use 1 bar = 100,000 Pa):

25,000 Pa

250,000 Pa

2,500,000 Pa

Concept: Bar to Pascal factor. With 1 bar = 100,000 Pa, multiply by 100,000. 2.5 bar = 250,000 Pa.

Explanation

Concept: Bar to Pascal factor. With 1 bar = 100,000 Pa, multiply by 100,000. 2.5 bar = 250,000 Pa.

16. To convert from Kelvin to Celsius, you ______ about 273.

Concept: Inverse temperature conversion. Celsius is Kelvin shifted by an offset. Subtracting returns to the Celsius scale.

Explanation

Concept: Inverse temperature conversion. Celsius is Kelvin shifted by an offset. Subtracting returns to the Celsius scale.

Submit

17. Convert 0.002 MPa to Pa:

2 Pa

200 Pa

2000 Pa

2,000,000 Pa

Concept: MPa to Pa. Multiply by 10⁶. 0.002 × 10⁶ = 2000 Pa.

Explanation

Concept: MPa to Pa. Multiply by 10⁶. 0.002 × 10⁶ = 2000 Pa.

18. To convert kPa to Pa, you ______ by 1000.

Concept: Prefix conversion direction. Moving from kilo- to the base unit increases the number. So you multiply by 1000.

Explanation

Concept: Prefix conversion direction. Moving from kilo- to the base unit increases the number. So you multiply by 1000.

Submit

19. Convert 450 kPa to Pa:

45,000 Pa

4500 Pa

450,000 Pa

4,500,000 Pa

Concept: kPa to Pa. Multiply by 1000. 450 × 1000 = 450,000 Pa.

Explanation

Concept: kPa to Pa. Multiply by 1000. 450 × 1000 = 450,000 Pa.

20. Kelvin and Celsius temperature steps (size of 1 unit) are:

Different sizes

The same size

Kelvin steps are twice as large

Celsius steps are half as large

Concept: Celsius vs Kelvin increments. A change of 1 K equals a change of 1 °C. The difference is the zero point, not the step size.

Explanation

Concept: Celsius vs Kelvin increments. A change of 1 K equals a change of 1 °C. The difference is the zero point, not the step size.

Temperature Pressure Conversion Quiz: Test Physics Conversions

1. Convert 25 °C to K (approx):

2.

What first name or nickname would you like us to use?

2. Convert 293 K to °C (approx):

3. A temperature difference of 20 °C is the same as a difference of 20 K.

4. Kelvin is an SI base unit, while Celsius is derived from Kelvin with an offset.

5. −10 °C is about 263 K.

6. Convert 101,000 Pa to kPa (approx):

7. 1 bar is not an SI unit, but it is often used for pressure.

8. Convert 0.35 MPa to kPa:

9. 200 kPa equals 0.2 MPa.

10. 1 MPa equals:

11. 0 °C is approximately 273 K.

12. 1 kPa equals ______ Pa.

13. Convert 5 °C to K (approx):

14. Convert 310 K to °C (approx):

15. Convert 2.5 bar to Pa (use 1 bar = 100,000 Pa):

16. To convert from Kelvin to Celsius, you ______ about 273.

17. Convert 0.002 MPa to Pa:

18. To convert kPa to Pa, you ______ by 1000.

19. Convert 450 kPa to Pa:

20. Kelvin and Celsius temperature steps (size of 1 unit) are: