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Mariana [72]
3 years ago
8

Let me know if you need help figuring out how to make something in little alchemy 2.

Physics
2 answers:
Y_Kistochka [10]3 years ago
7 0

Answer:

ok

Explanation:

Kaylis [27]3 years ago
3 0

Answer:ok

Explanation:

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A train rolls past a stationary observer. To him, the train is moving at a speed of 23m/s west, and a woman on the train is movi
GREYUIT [131]

Answer:

21.7 seconds.

Explanation:

Woman's velocity relative to train (23 m/s - 22.4 m/s) = 0.6 m/s

Distance woman wants to travel = 13m

To find how long she will take to move 13m relative to the train, take the distance she wants to travel divided by her velocity relative to the train.

(13m)/(0.6 m/s) = 21.6667 seconds or 21.7 seconds.  

Therefore, it will take the woman 21.7 seconds to move 13m.

4 0
3 years ago
What are advantages and disadvantages of apparent solar time? How is the situation improved by introducing mean solar time and s
Nutka1998 [239]

Answer:

Advantage:  

Apparent solar time gives the exact location of sun in the sky according to your precise location.

Disadvantage:  

As the apparent solar time changes with the change in longitude. It is very difficult to track these changes in longitude. Hence, it is almost impossible to make plan for events.

Improvement in situation:

Situation can be improved using mean solar time because due to this people living in the longitude band agree upon a standard time. In this way, it is easy to plan for events.  

3 0
3 years ago
_______is the force that keeps us all stuck to the surface of our planet.
worty [1.4K]

Answer:

gravity

Explanation:

4 0
3 years ago
Read 2 more answers
A car travels at 40 km/hr for two hours and 55 km/hr for two hours. How far does the car travel? What is the average velocity?
KiRa [710]

Driving at 40 km/h for 2 h contributes a distance of 80 km, while driving at 55 km/h for 2h contributes 110 km, giving a total of 190 km traveled. If the car is traveling in the same direction throughout this ordeal, then the average velocity is

\bar v=\dfrac{190\,\mathrm{km}}{4\,\mathrm h}=47.5\,\dfrac{\mathrm{km}}{\mathrm h}

6 0
3 years ago
A 7kg block slides down a 30 degree slope at a constant velocity of 2 m/s. How big is the force of friction acting on the block?
lisabon 2012 [21]

The force of friction is <u>34.3 N.</u>

A block of mass m slides down a plane inclined at an angle θ to the horizontal with a constant velocity.  According to Newton's first law of motion, every body continues in its state of rest or a state of uniform motion in a straight line, unless acted upon, by an external unbalanced force. This means that when balanced forces act on a body, the body moves with a constant velocity.

The free body diagram of the sliding block is shown in the attached diagram. Resolve the weight mg of the block into two components  mg sinθ along the direction of the plane and mg cosθ perpendicular to the plane . The force of friction   F acts upwards along the plane  and the normal reaction acts perpendicular to the plane.

Since the block moves down with a constant velocity, the downward force mg sinθ must be equal to the upward frictional force.

F = mg sin\theta

Substitute 7 kg for m, 9.8 m/s² for g and 30° for θ.

F = mg sin\theta = (7 kg)(9.8 m/s^2)(sin30^o) =34.3 N

The force of friction is <u>34.3 N</u> up the plane.


6 0
3 years ago
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