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3 years ago

1. f=

Physics

1 answer:

ahrayia [7]3 years ago

5 0

1. F = 8 Hz
2. V = 8 m/s
3. D = 8 m
4. T = 8 sec

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Can someone solve this problem and explain to me how you got it

Zarrin [17]

1) The electric force changes by a factor of 25

2) The electric force changes by a factor of 16/9

Explanation:

The magnitude of the electrostatic force between two charges is given by Coulomb's law:

$F=k\frac{q_1 q_2}{r^2}$

where:

$k=8.99\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the two charges

r is the separation between the two charges

In this problem, let's call F the initial force between the two charges when they are at a distance of r.

Later, the distance is changed by a factor of 5. Let's assume it has been increased to a factor of 5: so the new distance is

r' = 5r

Therefore, the new force between the charges is:

$F' = k' \frac{q_1 q_2}{r'^2}=k' \frac{q_1 q_2}{(5r)^2}=\frac{1}{25}(k' \frac{q_1 q_2}{r'^2})=\frac{F}{25}$

So, the force has changed by a factor of 25.

The original force between the two charges is

$F=k\frac{q_1 q_2}{r^2}$

In this problem, we have:

- The distance between the charges is changed by a factor of 6:

r' = 6r

- The charges are both changed by a factor of 8:

$q_1' = 8q_1$

$q_2' = 8q_2$

Substituting into the equation, we find the new force:

$F' = k' \frac{q_1' q_2'}{r'^2}=k' \frac{(8q_1) (8q_2)}{(6r)^2}=\frac{64}{36}(k' \frac{q_1 q_2}{r'^2})=\frac{16}{9}F$

So, the force has changed by a factor of 16/9.

Learn more about electric force:

brainly.com/question/8960054

brainly.com/question/4273177

#LearnwithBrainly

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3 years ago

If you change the mass of a moving object, you change its _______.

Paul [167]

Momentum and inertia, Momentum=P. P=MV. M=mass and V=velocity. Mass is related to inertia so inertia=F. F=MA. A=acceleration.

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4 years ago

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Distinguish between dia,para and ferro magnetic materials.

xz_007 [3.2K]

Answer:

The key difference between diamagnetic, paramagnetic and ferromagnetic materials is that diamagnetic materials are not attracted to an external magnetic field, and paramagnetic materials are attracted to an external magnetic field whereas ferromagnetic materials are strongly attracted to an external magnetic field.

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3 years ago

A comet is approaching Venus on a parabolic path with perigee distance of 18,200 km . Calculate the total time of travel (in hou

Anna35 [415]

Answer:

<em>The time traveled is 1.39 hrs</em>

Explanation:

Equation of Trajectory of a comet is given as

$r=\frac{h^2}{\mu}\frac{1}{1+cos \theta}$

Here

h is the specific angular momentum given as

$h=v_p r_p$

μ is gravitational parameter whose value is $3.24859 \times 10^{14} \, \, m^3/s^2$ for Venus
r_p is the perigee distance of parabolic which is 18200 km
As the path of comet is parabolic so energy is conserved i.e

$\frac{1}{2}m_c v_p^2-\frac{\mu m_c}{r_p}=0\\v_p=\sqrt{\frac{2 \mu}{r_p}}$

So h is given as

$h=v_pr_p\\\\h=\sqrt{2 \mu r_p}\\h=\sqrt{2 \times 3.24859 \times 10^{14} \times 18200 \times 10^3}\\h=1.087 \times 10^{11}$

So for point a where r=24500 km

$r_1=\frac{h^2}{\mu}\frac{1}{1+cos \theta_1}\\24500 \times 10^3=\frac{1.1824 \times 10^{22}}{3.24859 \times 10^{14}}\frac{1}{1+cos \theta_1}\\0.6731=\frac{1}{1+cos \theta_1}\\1+cos \theta_1=\frac{1}{0.6731}\\cos \theta_1=1.4857-1\\cos \theta_1=0.4857\\\theta_1=cos^{-1}0.4857\\\theta_1=1.0636 rad$

So for point a where r=39000 km

$r_2=\frac{h^2}{\mu}\frac{1}{1+cos \theta_2}\\39000 \times 10^3=\frac{1.1824 \times 10^{22}}{3.24859 \times 10^{14}}\frac{1}{1+cos \theta_2}\\1.0715=\frac{1}{1+cos \theta_2}\\1+cos \theta_2=\frac{1}{1.0715}\\cos \theta_2=0.9332-1\\cos \theta_2=-0.0667\\\theta_2=cos^{-1}(-0.0667)\\\theta_2=1.6375 rad$

So as per the Barkers equation

$t_1-T=\sqrt{\frac{2 r_p^3}{\mu}}(D_1+\frac{D_1^3}{3})$

where

$D_1=tan (\theta_1/2)\\D_1=tan(0.5318)\\D_1=0.5883$

$t_2-T=\sqrt{\frac{2 r_p^3}{\mu}}(D_2+\frac{D_2^3}{3})$

where

$D_2=tan (\theta_2/2)\\D_1=tan(0.8187)\\D_2=1.0690$

$t_2-t_1=\sqrt{\frac{2 r_p^3}{\mu}}(D_2+\frac{D_2^3}{3}-D_1+\frac{D_1^3}{3})\\t_2-t_1=\sqrt{\frac{2 (18200 \times 10^3)^3}{3.24859 \times 10^{14}}}((1.0690)+\frac{(1.0690)^3}{3}-(0.5883)-\frac{(0.5883)^3}{3})\\t_2-t_1=\sqrt{\frac{2 (18200 \times 10^3)^3}{3.24859 \times 10^{14}}}(0.8201)\\t_2-t_1=(6092)(0.8201)\\t_2-t_1=4996.21 s\\t_2-t_1=1.39 hrs\\$

So the time traveled is 1.39 hrs

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4 years ago

According to william james, the purpose of psychology was to ________.

masya89 [10]

According to William James, the purpose of psychology was to "study the function of behavior".

William James is known to be the first to offer a course of psychology in US. He also remains a popularly read philosopher, and his hypotheses on pragmatism have contributed both to the field of psychology and philosophy. As per James' pragmatism, the estimation of a thought is reliant upon its helpfulness in the real world as opposed to its outright truth.

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3 years ago

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