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Ilya [14]
3 years ago
11

What do Rachel's actions reveal about her

Physics
1 answer:
nexus9112 [7]3 years ago
6 0
Rachel from where ? a movie? book?
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The horizontal force exerted between the tires of a 500kg car and the ground is 980N. if the car starts from rest, how far will
Maksim231197 [3]

Answer:

Explanation:

d = ½at²

d = ½(F/m)t²

d = ½(980/500)5²

d = 24.5 m

6 0
2 years ago
A tube of mercury with resistivity 9.84 × 10 -7 Ω ∙ m has an electric field inside the column of mercury of magnitude 23 N/C tha
slava [35]

Answer:

The current through the tube is 73.39A.

Explanation:

The relationship between the resistivity \rho, the electric field E, and the current density J is given by

\rho = \dfrac{E}{J}

This equation can be solved for J to get:

J = \dfrac{E}{\rho}

Since the current is I = J\cdot A

I= J\cdot A  = \dfrac{E}{\rho} \cdot A

Now, for the tube of mercury \rho = 9.84*10^{-7}\: \Omega \cdot m, E = 23N/C, and the area is A = \pi r^2 = \pi (1.0*10^{-3}m)^2 = 3.14*10^{-6}m^2; therefore,

I= \dfrac{23N/C}{9.84*10^{-7}\Omega\cdot m } *3.14*10^{-6}m^2

\boxed{I = 73.39A.}

Hence, the current through the mercury tube is 73.39A.

5 0
3 years ago
Si un electrón recorre el acelerador lineal de Stanford de 2 millas de longitud a 99% de la velocidad de la luz, ¿Cuál es la lon
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UULUU 15 is Quritall Streptobacteria null hypothesis Scientic Method - An exemple: In early 2000 a disease appeared in the northeastern United States that had never been seen before. The disease produced a fever and nasal congestion causing the tip of the nose to turn red. The bacteria that caused the disease was isolated and found to be a certain
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2 years ago
Im stuck can someone help me?
mixer [17]
In 2.34 hours, the bus travels 16.34 km.

Average speed = (distance covered) / (time to cover the distance).

Average speed = (16.34 km) / (2.34 hours) = 6.983 km/hr
3 0
3 years ago
Because cosmic distances are so vast, astronomers use light-years as their unit of distance. One light-year is defined as ______
8090 [49]

Answer:

Because cosmic disaster are so vast, astronomers use light-years as their unit of distance. One light-year is defined as <u>the distance a beam of light travels in one year</u>. The nearest star is a little more than <u>4.37 light-years</u> away from us. When we see light from a galaxy 2 million light-years away, it has taken<u> 2 million Earth years</u> to reach us. Light from the Sun takes <u>approximately 8.4269 minutes</u> to reach us

Explanation:

i) One light-year is defined as the distance a light beam travels in a time of one Earth year. One light year is equivalent to 6 × 10¹² miles or 9.7 × 10¹² km

ii) The distance to the nearest star =  4.37 light-years

iii) When a star located in a galaxy that is 2.3 million light years away is seen, it has taken 2.3 million light years to reach us

iv) The distance of the Sun to the Earth = 151.58 million kilometers

The speed of light, c = 299792.458 km/s

The time it will take light to reach us from the Sun, 't', is given as follows;

t = 151.58 × 10⁶ km/(299792.458 km/s) ≈ 8.4269 minutes.

7 0
3 years ago
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