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Dimas [21]
3 years ago
9

If Joe rides his bicycle in a straight line for 15 min with an average velocity of 12.5 km/h south, how far has he ridden?.

Physics
2 answers:
kozerog [31]3 years ago
5 0
S=v*t
v=12.5 km/h
t=15min=1/4h
s=12,5km/h*1/4h=3,125km
alexdok [17]3 years ago
4 0
The distance traveled by the body or a system is the product of its velocity and the time it takes to travel the distance.
                                    d  = v x t
The time given, 15 min, is also equal to 0.5 h. Substituting the given values,
                                    d = (12.5 km/h) x (0.5 h)
Thus, Joe had ridden 3.125 km. 
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The frequency of a microwave is 1.2 x 10^9 hertz. what is the wavelength of the given problem.
Olenka [21]

Answer:

0.25 m

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The relationship between wavelength and frequency for an electromagnetic wave is:

\lambda=\frac{c}{f}

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f=1.2\cdot 10^9 Hz

So its wavelength is

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7 0
3 years ago
An electron is released from rest in a weak electric field given by vector E = -1.30 10-10 N/C ĵ. After the electron has travel
Murljashka [212]

Answer:

v =  6.45 10⁻³ m / s

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                F- W = m a

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               a = -1.6 10⁻¹⁹ / 9.1 10⁻³¹ (-1.30 10⁻¹⁰) - 9.8

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Now we can use kinematics, knowing that the resting parts electrons

              v² = v₀² + 2 a y

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4 0
3 years ago
The moon orbits the earth at a distance of 3.85 x 10^8 m. Assume that this distance is between the centers of the earth and the
Inga [223]

Answer:

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1 month = 30 days

T = 27.5 days \frac{1 month}{30 days} \\T = 0.92 month

6 0
3 years ago
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