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The exercise in the image involves converting various units into their SI equivalents, using scientific notation as required. I'll start by solving the first few conversions and explain the steps. Let me know if you'd like the rest completed similarly.

### 1. 350 cg (centigrams) to grams
\[
1 \, \text{cg} = 0.01 \, \text{g}
\]
\[
350 \, \text{cg} = 350 \times 0.01 \, \text{g} = 3.5 \, \text{g}
\]

### 2. 250.2 km/h to m/s
\[
1 \, \text{km/h} = \frac{1000 \, \text{m}}{3600 \, \text{s}} = \frac{5}{18} \, \text{m/s}
\]
\[
250.2 \, \text{km/h} = 250.2 \times \frac{5}{18} = 69.5 \, \text{m/s}
\]

### 3. 1.15 g/mL to kg/m³
\[
1 \, \text{g/mL} = 1000 \, \text{kg/m}^3
\]
\[
1.15 \, \text{g/mL} = 1.15 \times 1000 = 1150 \, \text{kg/m}^3
\]

### 4. -90°C to Kelvin
\[
T(K) = T(°C) + 273.15
\]
\[
T = -90 + 273.15 = 183.15 \, \text{K}
\]

### 5. 7 h to seconds
\[
1 \, \text{hour} = 3600 \, \text{seconds}
\]
\[
7 \, \text{h} = 7 \times 3600 = 25,200 \, \text{s}
\]

Would you like to see the remaining conversions?

### 5 Related Questions:
1. How can you convert pressure from bar to Pascal?
2. How do you convert speed from m/s to km/h?
3. What is the formula to convert between °F and °C?
4. How can we convert area density from g/cm² to kg/m²?
5. What is the significance of scientific notation in physics calculations?

### Tip:
Always double-check unit consistency when performing conversions to avoid calculation errors!

Convert various units to their SI equivalents using scientific notation, including units such as centigrams, kilometers per hour, grams per milliliter, and Celsius.

Learn how to convert various units such as centigrams, kilometers per hour, and Celsius to their SI equivalents using scientific notation. This exercise includes speed conversions, temperature shifts, and density transformations, suitable for high school students.

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