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irina1246 [14]
3 years ago
7

Question 1 of 10

Physics
1 answer:
natali 33 [55]3 years ago
5 0

Answer: B. A model of a cell is easier to manipulate

Explanation: just took the test//APEX

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A roller coaster has a vertical loop with radius 25.7 m. With what minimum speed should the roller-coaster car be moving at the
gogolik [260]

Answer:

15.88m/s

Explanation:

At the top of the roller coaster you will have three forces acting on the roller-coaster. See the image below. Fc is the centripetal force (for an object in circular motion), Fg is the gravitational force, and Fn is the normal force. To achieve the minimum speed we assume the roller-coaster is barely touching the vertical loop and so the normal force is zero. This leaves two acting forces.

F_g = F_c\\mg = \frac{m\times v^2}{r}\\v = \sqrt{gr} = \sqrt{9.81 \times 25.7}  = 15.88 m/s

7 0
3 years ago
Would a positive test charge released fromrest move toward a region of higher or lower electric potential(compared to the electr
Salsk061 [2.6K]

Answer:

D. The direction of the force will change and it will point to regions of lower potential energy.

Explanation:

Direction will change because now you will have the opposite charge. It will still move to the lower potential because of the law of conservation of energy.

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Acceleration increases over time once a force is applied to the object. Given a force of 10.0 Newtons, which mass will have the
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Mass is indirectly proportional to acceleration, so, lighter the object greater would be it's acceleration...

A) 0.10 kg is lightest among them, so it's your answer

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A summary of observational data is called a/an ____________.
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It is called a conclusion

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A cheetah is crouched 20 m to the east of an observer (Fig. 2.6a). At time the cheetah begins to run due east toward an antelope
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i dont know but help me by marking me the brainliest

Explanation:

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