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4 years ago

Which of thWhich of the following is a true statement?

Physics

2 answers:

Mars2501 [29]4 years ago

8 0

Answer:

B. Both electric fields and forces decrease in strength as the distance increases.

Explanation:

from the Coulomb's law

$F=\frac{k q_{1} q_{2} }{r^{2}}$

electrif field is also expressed as

F = qE., so

$E = \frac{k q}{r^{2}}$

it can seen that electric force and electric field and dependent on distance. that is inverse square of distance.

so, if the electric force and eletric field decreases in strength, it is because the distance of separation has increased.

IgorC [24]4 years ago

7 0

Answer:

B. Both electric fields and forces ...

Explanation:

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Which of the following can be the first step to take in organizing data

Natalka [10]

the first step would be gathering information , and making sure its correct

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3 years ago

Determina el tamaño de la arista de un cubo hecho de plata, cuya masa es de 10.49 kg.

Sidana [21]

Answer:

88.2 N

Explanation:

Datos

Lcubo = 10 cm = 0.1 m

Vcubo = Vfluido desalojado= 0.1 m x 0.1 m x 0.1 m = 10-3 m

mcubo = 10 kg

dfluido = 1000 kg/m3

g = 9.8 m/s2

Sabemos que el peso aparente de un cuerpo que se sumerge en un fluido es:

Paparente=Preal−Pfluido

Teniendo en cuenta que:

Preal = mcubo⋅gPfluido=E= dfluido⋅Vfluido⋅g

Como el cuerpo se sumerge completamente en el fluido, el volumen de fluido desalojado es exactamente el volumen del cubo. Por lo tanto si sustituimos los datos que nos proporcionan en el enunciado en la primera ecuación:

Paparente=mcubo⋅g−dfluido⋅Vfluido⋅g ⇒Paparente=10 kg ⋅9.8 m/s2 − 1000 kg/m3 ⋅10−3 m ⋅9.8 m/s2 ⇒Paparente = 88.2 N

7 0

3 years ago

A 2300 kg truck has put its front bumper against the rear bumper of a 2500 kg suv to give it a push. with the engine at full pow

valentina_108 [34]

F=ma
m=total mass = 2300kg+2500kg=4800
F=18000N
a=?
a=F/m
a=18000/4800
a=3.8m/s^2
Final answer

7 0

3 years ago

Read 2 more answers

3. Sailors use a capstan (shown below) to raise and lower the anchor. It takes two sailors located 1 meter from the center to tu

mr_godi [17]

Answer:

B. 2 meters.

Explanation:

To rotate the capstan a certain amount of torque is required, and if each sailor applies a force $F$ at a distance $D$ from the center, then for two sailors the total torque will be

$\tau = 2FD\\$ ;

therefore, for one sailor to apply the same torque it must be that the torque $\tau_2$ he applies must be equal to the torque that the two sailors applied: