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elixir [45]
3 years ago
7

Two charged objects attract each other with a certain force. If the charge on one of the objects is doubled with no change in th

e other or the separation, the force between them
A.) quadruples
B.) doubles
C.) halves
D.) increases, but we can't say how much without knowing the distance between them
Physics
1 answer:
Vanyuwa [196]3 years ago
4 0
It is B. secod try i know its dumb but im trying to cheer myself up
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A sample contains 10 g of a radioactive isotope. How much radioactive isotope will remain in the sample after 2 half-lives?
xxMikexx [17]
The answer c - Half life how to figure, you first divide it by half then divide than number by half
5 0
3 years ago
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HELP When the forces are applied in the same direction, how do you determine net force?
aleksklad [387]

Answer:

Explanation:

If two forces act on an object in the same direction, the net force is equal to the sum of the two forces.

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3 years ago
b. A string is wrapped around a pulley of radius 0.05 m and moment of inertia 0.2 kg  m2. If the string is pulled with a force
Oduvanchick [21]

Answer:

f = 8 N

Explanation:

Data provided in the question

Radius of the pulley  = r = 0.05 m

Moment of inertia = (I) = 0.2 kg.m^{2}

Angular acceleration = ∝ = 2 rad/sec

Based on the above information

As we know that

Torque is

= force \times  radius

= f \times r

And,

Torque is also

= moment\ of\ inertia \times angular\ acceleration

= I \times \alpha

So,

We can say that

f \times r = I \times \alpha

f \times 0.05 = 0.2 \times 2

0.05f = 0.4

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8 0
3 years ago
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babunello [35]
A substance feels warm
7 0
3 years ago
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A baseball bat changes the momentum of a ball with an impulse of 13.8 Nᐧs. What is the average force that the bat exerts on the
vladimir2022 [97]

Answer:

13800 N

Explanation:

Impulse is the product of average force and time expressed as I=Ft where I is the impulse which results into change in momentum, F is the average force and t is the time of impact. Making F the subject of formula then

F=\frac {I}{t}

Substituting I with 13.8 N.s and time, t witg 0.001 s then the average force is calculated as

F=\frac {13.8 N.s}{0.001}=13800N

Therefore, the average force is equivalent to 13800 N

4 0
3 years ago
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