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aleksandrvk [35]
3 years ago
5

How do I learn French fast for an examination​

Physics
1 answer:
alexandr402 [8]3 years ago
7 0

Explanation:

It isn't possible to learn an entire language fast. For an examination, memorise some of the easy words. Practice mew minutes speaking French and keep speaking it till you know it.

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A 41.0 kg child is riding a playground merry-go-round that is rotating at 60.0 rev/min. What centripetal force (in N) is exerted
Tatiana [17]

Answer:505.94 N

Explanation:

Given

mass of child (m)=41 kg

N=60 rpm

\omega =\frac{2\pi N}{60}=4\pi rad/s

Radius(r)=1.25 m

and centripetal acceleration is given by m\omega ^2r

F_c=41\times (4\pi )^2\times 1.25=505.94 N

3 0
4 years ago
How do you measure the volume of irregular object? explain with diagram​
masya89 [10]

Answer:

by using graphical meythod

4 0
3 years ago
Which of the following is not a natural resource? a. time b. water c. land d. air Please select the best answer from the choices
AleksAgata [21]

Answer: Option (a) is the correct answer.

Explanation:

Resources which are created by human beings are known as man-made resources.

For example, glass, rayon, nylon etc are all man-made resources.

Whereas resources which are naturally created are known as natural resources.

For example, wind, air, water etc are all natural resources.

Thus, we can conclude that out of the given options time is not a natural resource.

3 0
3 years ago
Water flows at a rate of 0.25 kg/sec in a 2.5 cm diameter tube having a length of 3m. Constant heat flux is imposed at the tube
Rus_ich [418]

Answer:

68.75W

Explanation:

Heat transfer is describe as the flow of thermal energy as a result of changes in temperature between two or more bodies. Heat  transferred via solid bodies is called conduction, and that associated with liquids and gases  is called convection, and likewise, the one attributed to electromagnetical waves  is called radiation.

heat transfer from the tube wall to the water = kA.ΔT

= 3500* π* (2.5 * 10⁻²)²/4 *40

= 68.75W

7 0
4 years ago
How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is
inn [45]
Two small spheres spaced 20.0 cm apart have equal charge.

How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57 x 10-21 N?

Number of Electrons = ?
5 0
3 years ago
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