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zaharov [31]
3 years ago
9

What is the mass of an object that has an acceleration of 2.63m/s2 when a unbalanced force of 112N is applied to it?

Physics
1 answer:
exis [7]3 years ago
4 0

Answer:

42.58kg

Explanation:

By Newton's second law, F = ma.

F is the force being applied, in this case 112N. a is the acceleration, in this case 2.63 m/s^2.

Thus, with some simple algebraic manipulation, we get the mass to equal:

m = F/a = 112N / 2.63 m/s^2 = 42.58kg

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How many significant figures are in the measurement 0.020 km?
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Which describes a feature of the physical changes of all substances?
JulijaS [17]

Answer:

A change in size, shape, or matter.

Explanation:

A physical change does not produce new substances. A physical change may only change the physical properties of a substance. a change in size, shape, or phase of matter.

8 0
2 years ago
A particle moves at a constant speed in a circular path with a radius of r=2.06 cm. If the particle makes four revolutions each
nataly862011 [7]

The centripetal acceleration is 13.0 m/s^2

Explanation:

For an object in uniform circular motion, the centripetal acceleration is given by

a=\frac{v^2}{r}

where

v is the speed of the object

r is the radius of the circle

The speed of the object is equal to the ratio between the length of the circumference (2\pi r) and the period of revolution (T), so it can be rewritten as

v=\frac{2\pi r}{T}

Therefore we can rewrite the acceleration as

a=\frac{4\pi^2 r}{T^2}

For the particle in this problem,

r = 2.06 cm = 0.0206 m

While it makes 4 revolutions each second, so the period is

T=\frac{1}{4}s = 0.25 s

Substituting into the equation, we find the acceleration:

a=\frac{4\pi^2 (0.0206)}{0.25^2}=13.0 m/s^2

Learn more about centripetal acceleration:

brainly.com/question/2562955

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8 0
3 years ago
Two small nonconducting spheres have a total charge of 90.0 C.
valentina_108 [34]

Answer: (a) Smaller charge is 2.7 \times 10^{-5} C and larger charge is 11.7 \times 10^{-5} C.

(b) Smaller charge is -11.4 \times 10^{-5} and larger charge is 9.1 \times 10^{-5}.

Explanation:

(a) When both the spheres have same charge then force is repulsive in nature as like charges tend to repel each other.

Therefore, total charge on the two non-conducting spheres will be calculated as follows.

        Q_{1} + Q_{2} = 90 \mu \times \frac{10^{-6}C}{1 \muC}

                      = 9 \times 10^{-5} C

Therefore, force between the two spheres will be calculated as follows.

        F = k\frac{Q_{1}Q_{2}}{r^{2}}

       12 N = \frac{(9 \times 10^{9} Nm^{2}/C^{2})Q_{1}Q_{2}}{(0.28 m^{2})}

       Q_{1}Q_{2} = 0.104 \times 10^{-9} C^{2}

or,     Q_{1}(9 \times 10^{-5} - Q_{1}) = 0.104 \times 10^{-9} C^{2}

    9 \times 10^{-5}Q_{1} - Q^{2}_{1} = 0.104 \times 10^{-9} C^{2}

    Q^{2}_{1} - 9 \times 10^{-5}Q_{1} + 0.104 \times 10^{-9} = 0

        Q_{1} = 11.7 \times 10^{-5} C, 2.7 \times 10^{-5} C

This means that smaller charge is 2.7 \times 10^{-5} C and larger charge is 11.7 \times 10^{-5} C.

(b)  When force is attractive in nature then it means both the charges are of opposite sign.

Hence, total charge on the non-conducting sphere is as follows.

      Q_{1} + (-Q_{2}) = 90 \mu \times \frac{10^{-6}C}{1 \muC}

      Q_{1} - Q_{2} = 9 \times 10^{-5} C

Now, force between the two spheres is calculated as follows.

    F = k\frac{Q_{1}Q_{2}}{r^{2}}

    12 N = \frac{(9 \times 10^{9} Nm^{2}/C^{2})Q_{1}Q_{2}}{(0.28 m^{2})}

   Q_{1}Q_{2} = 0.104 \times 10^{-9} C^{2}

   Q_{1}(Q_{1} - 9 \times 10^{-5}) = 0.104 \times 10^{-9} C^{2}

    Q^{2}_{1} - 9 \times 10^{-5}Q_{1} = 0.104 \times 10^{-9} C^{2}

        Q_{1} = -11.4 \times 10^{-5}, 9.1 \times 10^{-5}

Hence, smaller charge is -11.4 \times 10^{-5} and larger charge is 9.1 \times 10^{-5}.

8 0
3 years ago
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