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photoshop1234 [79]
3 years ago
14

Analogy: atom is to element as ____ is to compound

Physics
1 answer:
Masja [62]3 years ago
5 0
Molecule is the answer to what you are looking for

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In an experiment of a simple pendulum, measurements show that the pendulum has length し 0.397 ± 0.006 m, mass M-0.3172 ± 0.0002
vichka [17]

Answer:

1.)1.265+or minus 0.0006m

2).0.71%

Explanation:

See attached file

6 0
2 years ago
You have two electrical devices plugged into the same socket in parallel and draws 120 V. The first device has a resistance of 2
erik [133]

The devices don't "draw" 120v. The 120v comes to your house from the power company. They decide it should be 120v and that's what they send you. It's hypothetically technically possible for you to change that, but if you try it, you'll definitely burn the house down.

The total resistance of those two devices in parallel is 6 and 2/3 ohms. That doesn't depend on what they're plugged into. It would still be 6 and 2/3 ohms if they were connected in parallel, wrapped in tissue, sealed in a jar of chicken soup and stored in a box on a high shelf.

But since they ARE plugged into 120v, they draw 18 Amperes from the socket, and they turn all of that electrical energy into 2160 watts of heat. That's about the same as a good size toaster oven, and you have to figure out a way to get rid of all that heat before you burn the house down.

4 0
2 years ago
It takes 300 newtons of force and a distance of 20 meters for a moving car to come to stop
Arlecino [84]
The answer is 15 I think.
6 0
2 years ago
A liquid flowing from a vertical pipe has a very definite shape as it flows from the pipe. To get the equation for this shape, a
Eva8 [605]
Calculating speed as function of distance y is fairly easy. Once water leaves pipe it is under free fall which means that it is accelerating with gravitational acceleration "a".
V=Vo + Vff   where Vff is speed gained due to free fall.
Vff = t*a =  \sqrt{2ay}
V = Vo +  \sqrt{2ay}

Calculating radius of stream is a little bit more complicated. Because water is accelerating as it falls it has to lower its radius. The reason for this is that water flow must be the same as one at the exit of pipe. Water flow is expressed in  liters/meter^3
Because of this we write condition:
V1/V2 = A2/A1 where  A2 and A1 are sections of water stream.
let V1 and A1 be the speed and section of water stream at the end of pipe.
A2 = V1*A1/V2

r^{2}  = \frac{Vo*  r_{0} ^{2} }{Vo+ \sqrt{2ay} }
4 0
3 years ago
Read 2 more answers
A thin rod of length 0.83 m and mass 110 g is suspended freely from one end. It is pulled to one side and then allowed to swing
VARVARA [1.3K]

Explanation:

(a)  The given data is as follows.

    Length of the rod, L = 0.83 m

    Mass of the rod, m = 110 g = 0.11   (as 1 kg = 1000 g)

 At the lowest point, angular speed of the rod (\omega) = 5.71 rad/s

First, we will calculate the rotational inertia of the rod about an axis passing through its fixed end is as follows.

      I = I_{CM} + mh^{2}

        = \frac{1}{12}mL^{2} + m(\frac{L}{2})

        = \frac{1}{12} \times 0.11 \times (0.83)^{2} + 0.11 \times \frac{0.83}{2}

        = 0.00631 + 0.415

        = 0.42131 kg m^{2}

Therefore, kinetic energy of the rod at its lowest point will be calculated as follows.

             K = \frac{1}{2}I \omega^{2}

                = \frac{1}{2} \times 0.42131 kg m^{2} \times (5.71)^{2}

                = 6.86 J

Hence, kinetic energy of the rod at its lowest point is 6.86 J.

(b)   According to the conservation of total mechanical energy of the rod, we have

         K_{i} + U_{i} = K_{f} + U_{f}

           K_{i} = U_{f} - U_{i}

or,      mgh = K = 6.86 J

Therefore,      h = \frac{6.86}{mg}

                          = \frac{0.63}{0.11 \times 9.8}

                          = 0.584 m

Hence, the center of mass rises 0.584 m far above that position.

6 0
3 years ago
Read 2 more answers
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