Para-jumble (sentence arrangement): Arrange P–Q–R–S to complete the physics paragraph about a satellite launch, air resistance, and heating. S1 = "When a satellite is launched, the rocket begins by going slowly upwards through the air." P = "However, the higher it goes, the less air it meets." Q = "As the rocket goes higher, it travels faster." R = "For the atmosphere becomes thinner." S = "As a result there is less friction." S6 = "Consequently, the rocket still does not become too hot." Between S1 and S6, place P–Q–R–S in a logically flowing order based on cause and effect. Choose the correct sequence of P–Q–R–S that completes the paragraph.

Given data

• Topic: satellite launch and rocket heating due to air friction.
• P: higher altitude ⇒ less air encountered.
• Q: higher altitude ⇒ faster travel.
• R: reason for P — atmosphere gets thinner.
• S: consequence — less friction → less heating.

Concept/Approach
We seek a cause → explanation → consequence chain that leads naturally into S6 (rocket does not become too hot).

Step-by-step reasoning
Start with P: at higher altitudes the rocket meets less air. Bring in Q: simultaneously, as it climbs, its speed increases. Support P with R: this is because the atmosphere becomes thinner. Conclude with S: less air ⇒ less friction despite higher speed.

Verification/Alternative
Ending on S makes S6 (no excessive heating) an immediate and logical corollary.

Common pitfalls
Placing R before P introduces a reason before the effect is stated.

Final Answer
PQRS