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Vadim26 [7]
3 years ago
6

Scenario A: A 3 spring is compressed a distance of 1.0 m. Scenario B: A 6 spring is compressed a distance of 0.8 m. Scenario C:

A 9 spring is compressed a distance of 0.6 m. Scenario D: A 12 spring is compressed a distance of 0.4 m. Which scenario generates the most elastic potential energy?
Physics
2 answers:
lapo4ka [179]3 years ago
6 0

The CORRECT answer is B

Westkost [7]3 years ago
5 0

Answer:

Scenario B)

Explanation:

The elastic potential energy stored in a spring is given by:

U=\frac{1}{2}kx^2

where k is the spring constant and x is the compression/stretching of the spring.

Let's calculate the potential energy of each spring by using this formula:

A) U=\frac{1}{2}(3 N/m)(1.0 m)^2=1.5 J

B) U=\frac{1}{2}(6 N/m)(0.8 m)^2=1.92 J

C) U=\frac{1}{2}(9 N/m)(0.6 m)^2=1.62 J

D)  U=\frac{1}{2}(12 N/m)(0.4 m)^2=0.96 J

Therefore, the scenario with most elastic potential energy is B.

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Answer:

799.54 ft

Explanation:

Linear thermal expansion is:

ΔL = α L₀ ΔT

where ΔL is the change in length,

α is the linear thermal expansion coefficient,

L₀ is the original length,

and ΔT is the change in temperature.

Given:

α = 1.2×10⁻⁵ / °C

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ΔT = -17°C − 31°C = -48°C

Find: ΔL

ΔL = (1.2×10⁻⁵ / °C) (800 ft) (-48°C)

ΔL = -0.4608

Rounded to two significant figures, the change in length is -0.46 ft.

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3 years ago
15) On a cold day, you take in 4.2 L (i.e., 4.2 x 10-3 m3) of air into your lungs at a temperature of 0°C. If you hold your brea
Rudiy27

Answer:

4.8L ( i.e 4.8 x 10^-3 m3)

Explanation:

Step 1:

Data obtained from the question.

Initial volume (V1) = 4.2L

Initial temperature (T1) = 0°C

Final temperature (T2) = 37°C

Final volume (V2) =?

Step 2:

Conversion of celsius temperature to Kelvin temperature. This is illustrated below

K = °C + 273

T1 = 0°C = 0°C + 273 = 273K

T2 = 37°C = 37°C + 273 = 310K

Step 3:

Determination of the final volume.

Since the pressure is constant,

Charles' Law equation will be applied as shown below:

V1 /T1 = V2/T2

4.2/273 = V2 /310

Cross multiply to express in linear form

273 x V2 = 4.2 x 310

Divide both side by 273

V2 = (4.2 x 310)/273

V2 = 4.8L ( i.e 4.8 x 10^-3 m3)

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