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AysviL [449]
3 years ago
13

Steve and Carl are driving from Scranton to Bridgeport a distance of 180 miles if they're speed averages 60 miles an hour how lo

ng will it take them to get there
Physics
1 answer:
Anarel [89]3 years ago
7 0
It will take at least 3 hours for them to get to Bridgeport
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Whose geocentric model of the solar system was accepted for 1400 years
-BARSIC- [3]

Answer:

Plato, Aristotle developed it further and used for 1400 years till Copernicus.

Explanation:

8 0
3 years ago
This problem follows up on a discussion from lecture. A wind turbine with an efficiency of 45% for converting wind energy into e
Volgvan

Answer:

4.1 m

Explanation:

10 kW = 10000 W

20mi/h = 20*1.6 km/mi = 32 km/h = 32 * 1000 (m/km) *(1/3600) hr/s = 8.89 m/s

The power yielded by the wind turbine can be calculated using the following formula

P = \frac{1}{2} \rho v^3 A C_p

where \rho = 1.2 kg/m^3 is the air density, v = 8.89 m/s is the wind speed, A is the swept area and C_p = 0.45 is the efficiency

10000 = 0.5 * 1.2 * 8.89^3 * A * 0.45

10000 = 190A

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The swept area is a circle with radius r being the blade length

\pi r^2 = A = 52.7

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r = \sqrt{16.79} = 4.1 m

4 0
3 years ago
A silver bar 0.125 meter long is subjected to a temperature change from 200 C to 100 C . What will be the length of the bar afte
dimulka [17.4K]
\Delta L= \alpha L_0 (T_f-T_i)

= (18 x 10^-6 /°C)(0.125 m)(100° C - 200 °C)

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New length = L + ΔL
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8 0
3 years ago
Read 2 more answers
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ivolga24 [154]

Answer:

D

Explanation:

First we define our variables

V0=29.4

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All we do is substitute our values

0=29.4^2-19.6X

29.4^2=19.6X

X=29.4^2/19.6=44.1

5 0
2 years ago
Is the maximum displacement of a point on a vibrating body or wave.
Georgia [21]
The correct answer is amplitude
7 0
3 years ago
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