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Otrada [13]
3 years ago
13

The Milky Way and the Andromeda are both________.

Physics
1 answer:
Igoryamba3 years ago
6 0
They are both spiral galaxies
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Why are slow twitch muscles more beneficiall than fast twitch mucles for cardiorespiratory fitness
Dmitriy789 [7]

Answer:

otherwise known as option D

Explanation:

:)

4 0
3 years ago
Read 2 more answers
A 30 g horizontal metal bar, 13 cm long, is free to slide up and down between two tall, vertical metal rods that are 13 cm apart
natita [175]

Answer:

Terminal speed, v = 6901.07 m/s

Explanation:

It is given that,

Mass of the horizontal bar, m = 30 g = 0.03 kg

Length of the bar, l = 13 cm = 0.13 m

Magnetic field, B=5.5\times 10^{-2}\ T

Resistance, R = 1.2 ohms

We need to find the terminal speed oat which the bar falls. When terminal speed is reached,  

Force of gravity = magnetic force

mg=ilB..................(1)

i is the current flowing

l is the length of the rod

Due to the motion in rods, an emf is induced in the coil which is given by :

E=Blv, v is the speed of the bar

iR=Blv

i=\dfrac{Blv}{R}

Equation (1) becomes,

mg=\dfrac{B^2l^2v}{R}

v=\dfrac{mgR}{B^2l^2}

v=\dfrac{0.03\times 9.8\times 1.2}{(5.5\times 10^{-2})^2(0.13)^2}

v = 6901.07 m/s

So, the terminal speed at which the bar falls is 6901.07 m/s. Hence, this is the required solution.

5 0
3 years ago
5.
erastova [34]
<span>Answer: A. Exercising above your target heart rate.</span>

The individual's current level of fitness depends on the amount of exercise needed. I would advise my friend to exercise above her/his target heart rate to help improve her/his cardiovascular endurance for an individual has genetically the capacity to adapt to training, his or her fitness goals, and to the component being developed such as improve cardiovascular endurance.

<span>In addition, if my friend is exercising with in or below her/his target heart rate, her/his goal will not be achieve because her/his stamina and strength will not increase. If she/he will like to improve her/his cardiovascular endurance, a gradual increase in her/his workouts must be done.  Therefore, she/he must exercise above her/his target heart rate.</span>

<span>

</span>
8 0
3 years ago
A train travels 120 km in 2 hours and 30 minutes. what is it average speed?
Solnce55 [7]
The answer is 48Kmh because it is 120km divided by 2.5 or 2 and a half hours
4 0
3 years ago
Why is the velocity of a wave in shallow water proportional to depth of water
Ratling [72]
The speed is faster in deep water and in shallow water the friction with the bottom of the seabed slows the waves down.
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3 years ago
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