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Ratling [72]
3 years ago
9

Suppose two point charges, Q1 = +3.37 x 10^-6 C and Q2 = -8.21 x 10^-6 C, are separated by a distance d = 1.99 m.

Physics
1 answer:
valentina_108 [34]3 years ago
8 0
Option (C) is the correct one.



Explanation:
Coulmbs law here is,

\frac{9 \times  {10}^{9}   \times ( - 8.21 \times  {10}^{ - 6} )(3.37 \times  {10}^{ - 6} )}{ {(1.99)}^{2} }  \\  \\  =  - 0.0628  \\

Which is almost equal to optionC.
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you slide across home plate during baseball game. If you have a mass of 82 kg, and the coefficient of kinetic friction between y
Tju [1.3M]

m = mass of the person = 82 kg

g = acceleration due to gravity acting on the person = 9.8 m/s²

F = normal force by the surface on the person

f = kinetic frictional force acting on the person by the surface

μ = Coefficient of kinetic friction = 0.45

The normal force by the surface in upward direction balances the weight of the person in down direction , hence

F = mg                                          eq-1

kinetic frictional force on the person acting is given as

f = μ F

using eq-1

f = μ mg

inserting the values

f = (0.45) (82) (9.8)

f = 361.6 N

8 0
3 years ago
Read 2 more answers
Two forces are applied to a 17 kg box, as shown. The box is on a smooth surface. Which statement best describes the acceleration
RoseWind [281]
To the picture the answer is A. I can’t answer the typed question because I need the picture for the box
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3 years ago
5. Each of five satellites makes a circular orbit about an object that is much more massive than any of the satellites. The mass
Vikentia [17]

The options of the question are missing. I have attached it.

Answer:

Satellite in option B will have the greatest speed.

Explanation:

From kepplers third law, we know that

V² = GM/R

Thus, v = √(GM/R)

Where;

v is velocity

G is gravitational constant

M is mass

R is radius

Looking at the options, let's start from the first one;

Option A

Here, mass = (1/2)m and radius = R

So, v = √(GM/R) thus v = √(G(m/2)/R) = √(Gm/2R)

Option B

Here, mass = m and radius = (1/2)R

Thus v = √(Gm/(R/2)) = √(2Gm/R)

Option C

Here, mass = m and radius = R

Thus v = √(Gm/R)

Option D

Here, mass = m and radius = 2R

Thus v = √(Gm/(2R))

Now, inspecting all the options, it's clear that option B will have the greatest velocity because it's numerator is the biggest and will in turn lead to higher velocity.

4 0
3 years ago
A cheetah, which is the fastest land mammal, can accelerate at 9 m/s from rest to in 31 m/s. How long does
Anna007 [38]

31 m/s ÷ 9 m/s² = 3.44 s

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8 0
3 years ago
Wave-particle duality tells us that wave and particle models apply to all objects whatever the size, so why don't we observe wav
Genrish500 [490]

Answer:

Because the wavelengths of macroscopic objects are too short for them to be detectable.

Explanation:

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So, for macroscopic objects, the mass is very large compared to microscopic objects. As we can observe from the above formula, there is an inverse relationship between the mass and wavelength of the object.

So, for vary larger masses, the wavelength would be too short and one will find it undetectable. Therefore, we don't observe wave properties in macroscopic objects.

4 0
3 years ago
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