A car with good tires on a dry road can decelerate (slow down) at a steady rate of about 5.0 m/s2 when braking. If a car is initially traveling at 55 mi/h

(a) how much time does it take the car to stop?
(b) what is its stopping distance?

What will be an ideal response?


(a) 4.9 s (b) 60 m

Physics & Space Science

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The typical temperature of an interstellar cloud that could collapse to a protostar is about ________.

A. 1,500 K B. 10 K C. 300 K D. 1,000 K

Physics & Space Science

Entropy: What is the change in entropy when 15.0 g of water at 100°C are turned into steam at 100°C? The latent heat of vaporization of water is 22.6 × 105 J/kg.

A. 90.8 J/K B. -90.8 J/K C. 339 J/K D. -339 J/K E. 0 J/K

Physics & Space Science

The following images show four planets in our solar system. Rank these planets from left to right based on the number of moons that orbit them, from highest to lowest. (Not to scale.)

What will be an ideal response?

Physics & Space Science

Which carbonate mineral reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas?

What will be an ideal response?

Physics & Space Science