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3 years ago

Burl and Paul have a total weight of 992 N. The tensions in the ropes that

Physics

1 answer:

exis [7]3 years ago

6 0

Answer:

1670 N

Explanation:

The weight of ropes is negligible hence considering that Burl and Paul have a total weight of 992 N while the total weight of the scaffold while they are in it is equivalent to 2662 N then to get the weight if scaffold we have to deduct the the weight of Burl and Paul from the total weight.

Therefore, scaffold will be 2662-992= 1670 N

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g A small object of mass 2.5 g and charge 18 uC is suspended motionless above the ground when immersed in a uniform electric fie

kvasek [131]

Answer: $1361.11\ N/C,\text{upward}$

Explanation:

Given

Mass of particle is $m=2.5\ gm$

Charge of particle is $q=18\ \mu C$

Electrostatic force must balance the weight of the particle

$\lim_{n \to \infty} a_n \Rightarrow mg=qE\\\\\Rightarrow E=\dfrac{2.5\times 9.8\times 10^{-3}}{18\times 10^{-6}}\\\\\Rightarrow E=1361.1\ N/C$

Direction of the electric field is in upward direction such that it opposes the gravity force.

4 0

3 years ago

What is the electric force acting between two charges of -0.0050 C and 0.0050 C that are 0.025 m apart?

nika2105 [10]

Answer:

(A) $-3.6\times 10^8\ N$

Explanation:

Given:

Charge of one particle (q₁) = -0.0050 C

Charge of another particle (q₂) = 0.0050 C

Separation between them (d) = 0.025 m

We know that, from Coulomb's law, electric force acting between two charged particles is given as:

$F_e=\dfrac{kq_1q_2}{d^2}\\\\Where,k\to Coulomb's\ constant = 9\times 10^9\ N\cdot m^2/C^2$

Plug in the given values and solve for electric force, $F_e$ . This gives,

$F_e=\frac{(9\times 10^9\ N\cdot m^2/C^2) (-0.0050\ C)(0.0050\ C)}{(0.025\ m)^2}\\\\F_e=\frac{-2.25\times 10^{-4}\times 10^9}{6.25\times 10^{-4}}\ N\\\\F_e=-3.6\times 10^8\ N$

Therefore, option (A) is correct. Negative sign implies that the nature of electric force is attraction.

3 0

3 years ago

Which of the following non-metals is used as a lubricant in powdered form?

blondinia [14]

Answer:

Graphite.

Explanation:

Graphite:<em> "a gray crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors."</em>

5 0

3 years ago

Two metals are used to make batteries. Would a battery in which both metals components are copper, make a good battery? Explain

alexdok [17]

I think that the answer is yes. Because copper is a cunductor of DC and AC. However electritions are trying to avoid copper wiring because its a poor conductor.

So I guess you could goth ways but I say yes it could work.

4 0

3 years ago

Limestone formations in caves are considered what kind of weathering?

Zanzabum

Answer:

Explanation:

because the carbonic acid reacts to the limestone.

8 0

2 years ago