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earnstyle [38]
2 years ago
13

A 31.7 kg kid initially at rest slides down a frictionless water slide at 53.2 degrees, how fast is she moving in 3.45 s later?

Physics
1 answer:
Murrr4er [49]2 years ago
8 0

Answer:

34.55 m/s

Explanation:

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. The international space station has a mass of 4.2 x 105 kg and it orbits the Earth at an average altitude of 400 km above the
Tresset [83]

Answer:

A. 93 min

Explanation:

M = mass of earth = 6.0 x 10²⁴ kg

R = Radius of earth = 6400 km = 6.4 x 10⁶ m

h = Altitude above earth = 400 km = 0.4 x 10⁶ m

Radius of orbit of the space station around earth is given as

r = R + h

r = 6400 + 400

r = 6800 km

r = 6.8 \times 10^{6} m

T = Time period of orbit of space station

Here we can use Kepler's third law which is given as

T^{2} = \frac{4\pi ^{2} r^{3}}{GM}

Inserting the above values

T^{2} = \frac{4(3.14)^{2} (6.8\times10^{6})^{3}}{(6.67\times10^{-11})(6.0\times10^{24})}

T^{2} = 3.1\times 10^{7}

T = 5566.53 sec

T = 5566.53 \left ( \frac{1min}{60sec} \right )= 93 min

5 0
3 years ago
What are 3 ways objects can be grouped based on how much light they let shine/pass through them.
Wittaler [7]

Answer:

Transparent = lets light pass through without significant interference

Translucent = lets light pass through with significant interference

Opaque = Doesn't let light pass, instead absorbs it

5 0
3 years ago
A block is at rest on the incline shown in the figure. The coefficients of static and ki- netic friction are μs = 0.62 and μk =
GREYUIT [131]

The frictional force is 218.6 N

Explanation:

The block in the problem is at rest along the inclined surface: this means that the net force acting along the direction parallel to the incline must be zero.

There are two forces acting along this direction:

- The component of the weight parallel to the incline, downward along the plane, of magnitude

mg sin \theta

where

m = 46 kg is the mass

g=9.8 m/s^2 is the acceleration of gravity

\theta=29^{\circ} is the angle of the incline

- The (static) frictional force, acting upward, of magnitude F_f

Since the block is in equilibrium, we can write

mg sin \theta - F_f = 0

And substituting, we find the force of friction:

F_f = mg sin \theta = (46)(9.8)(sin 29^{\circ})=218.6 N

Learn more about frictional force along an inclined plane:

brainly.com/question/5884009

#LearnwithBrainly

7 0
3 years ago
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
Sunny_sXe [5.5K]

friction make non moving objects starts to move

  • true

there are different types of force which may help them to move

3 0
3 years ago
Which is happening when humans control the breeding of living things to favor certain desired features?
77julia77 [94]
Selective breeding. That is, breeding which uses extreme selectivity
5 0
3 years ago
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