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Butoxors [25]
3 years ago
12

Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up

Physics
1 answer:
Dmitry_Shevchenko [17]3 years ago
4 0

Answer:

B

Explanation:

If you subtract the 5 m/s that the train is already going from 45 m/s (giving you 40 m/s) and then divide that by 8 you’d get B. 5 m/s

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If an astronaut goes on a space walk outside the Space Station, she will quickly float away from the station unless she has a te
Strike441 [17]

Answer:

d. This statement is false. She and the Space Station share the same orbit and will stay together unless they are pushed apart.

Explanation:

In astronomy, orbit is simply a path of an object around another object in a space. That is, orbit is a path of a body that revolves around a gravitating center of mass. Examples of an orbit is are satellite around a planet, orbit around a center of galaxy, planet around the sun, and among others.

On the other hand, space station refers to a spacecraft that can support a group of human for long time in the orbit. Another names for space stations are orbital space station and orbital station.

Therefore, an astronaut goes on a space walk outside the Space Station shares the same orbit with the space station and they will stay together unless they are pushed apart.

4 0
3 years ago
A circuit has an impedance of 5 ohms and a voltage of 100 volts. What is the current flow?
Ket [755]

A circuit with an impedance of 5 ohms and a voltage of 100 volts has a current flow of 20 A.

The expression of an electronic component, circuit, or system's resistance to alternating and/or direct electric current is called impedance, indicated by the letter Z. Resistance and reactance are two distinct scalar (one-dimensional) phenomena that combine to form impedance, a vector (two-dimensional) variable.

Z^{} = \frac{V}{I}

(for a pure resistor where Z=R,preserving the form of the DC Ohm's law).

I=\frac{V}{Z}

I = \frac{100}{5}

I = 20 A

Therefore, A circuit with an impedance of 5 ohms and a voltage of 100 volts has a current flow of 20 A.

Learn more about  impedance here;

brainly.com/question/2263607

#SPJ4

6 0
2 years ago
Physical quantities expresed only by their magnitude is​
MrMuchimi

Answer:

Scalar quantity is the Physical quantity expresed only by their magnitude.

8 0
3 years ago
Once​ Kate's kite reaches a height of 52 ft ​(above her​ hands), it rises no higher but drifts due east in a wind blowing 6 ft d
Andru [333]

Answer:

5.213ft

Explanation:

Z² = x² + y²

x = √(z² - y²)

y = 52ft, dx = 6ft, z = 105ft, dz = ?

d(z² = x² + y²)

2zdz = 2xdx

dz = xdx/z

But x = √(z² - y²)

dz = √(z² - y²)/z * dx

dz = [√(105² - 52²)/105] * 6

dz = √(8521)/ 17.5

dz = 5.213ft

7 0
3 years ago
The color of a star is
never [62]
D determined by its temperature
8 0
4 years ago
Read 2 more answers
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