Friday
December 13, 2013

# Posts by selena

Total # Posts: 139

Algebra 2
To rationalize the denominator of 4/(2+√8), Brittany multiplied by (2-√8)/(2-√8) and Justin multiplied by (1-√2)/(1-√2). Explain why both are correct.

Chemistry
What is the temperature change in celsius when 29.5L of water absorbs 2.3 kwh of heat?

physics
What is its speed after 1.87 s if it accelerates uniformly at −4.31 m/s^2? Answer in units of m/s

physics
The initial speed of a body is 2.14 m/s. What is its speed after 1.87 s if it accelerates uniformly at 4.31 m/s^2? Answer in units of m/s

physics
A body moving with uniform acceleration has a velocity of 10.2 cm/s when its x coordinate is 3.73 cm.If its x coordinate 2.33 s later is −2.74 cm,what is the x-component of its acceleration?Answer in units of cm/s^2

physics
What is the average acceleration a between 14 s and 16 s?

physics
What is the average velocity v between 0 s and 6 s?

physics
A certain car is capable of accelerating at a rate of 0.57 m/s^2.How long does it take for this car to go from a speed of 56 mi/h to a speed of 66 mi/h? 1mi/h = 0.447 m/s.Answer in units of s

physics
A vehicle moves in a straight line with an acceleration of 5 km/h^2.By how much does the speed change each second?Answer in units of km/h

physics
Consider the expression 2π times square root of ℓ/g, where ℓ is length and g is gravitational acceleration in units of length divided by time squared.Evaluate its units.

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