What is the net force and direction the box will move in ?

a. Jessica's has a greater linear speed.

b. The centripetal acceleration of Julie and her horse is 0.148 m/s².

Jessica's has a greater linear speed.

To answer the question, we need to know what Linear speed is.

This is the tangential speed at which an object in circular motion moves. It is given by v = rω where

Now, given that Jessica is riding on a merry-go-round on an outer horse that sits at a distance of 8.0 m from the center of the ride and Jessica's sister, Julie, is on an inner horse located 6.0 m from the ride's center. Also, the merry-go-round is moving at constant angular speed.

Since Linear speed v = rω and ω = constant,

So, v ∝ r.

So, the girl with the greater distance from the center of the merry-go-round would have the greater linear speed.

Since

Since

So, Jessica's has a greater linear speed.

The centripetal acceleration of Julie and her horse is 0.148 m/s².

Centripetal acceleration a = rω² where

Since the merry-go-round turns once every 40.0 s, we have that ω = 2π/40.0 s

= π/20.0 s

= 0.157 rad/s

Since a = rω²

Substituting the values of the variables into the equation, we have

a = rω²

a = 6.0 m × (0.157 rad/s)²

a = 6.0 m × 0.0247 rad²/s²

a = 0.148 m/s²

So, the centripetal acceleration of Julie and her horse is 0.148 m/s².

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Answer:D

Explanation: temperature is the measure of hotness and coldness of a body.

Answer:

6.32 m/s

Explanation:

KE = 1/2 m v^2

sqrt (2 * KE /m) = v = 6.32 m/s    

Answer:

True

Explanation:

You pay back what you owe for what youve purchased

Answer: True

Explanation:

The attractive force between sugar and flour by using Newton's law of gravitation is 14.229 × 10⁻¹¹ N.

This law states that every object in the universe attracts each other. The attractive force is directly proportional to the masses of two objects and inversely proportional to the square of the distance between them.

This law is applicable to all the objects with mass in the universe and hence it is called the Universal law of gravitation. It was proposed by Newton.

The attractive force, F =G (m₁×m₂ / r²). m₁,m₂ is the masses of two objects and r is the distance between two masses. G is the gravitational constant and is equal to 6.67×10⁻¹¹Nm²kg⁻².

From the given,

Gravitational constant,G = 6.67×10⁻¹¹Nm²kg⁻²

m₁ (mass of sugar) = 1.2 kg

m₂ (mass of flour) = 9.4 kg

r (distance of separation) = 2.3 m

The attractive force, F = G (m₁×m₂ / r²)

F =  6.67×10⁻¹¹×(1.2×9,4) / (2.3)²

 = 14.229 × 10⁻¹¹ N

Thus, the attractive force F = 14.23 × 10⁻¹¹ N.

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The mass of an alpha particle greater than the mass of an electron. Hence option A is correct.

The alpha particle is a positively charged particle that is similar to the nucleus of the helium-4 atom and is spontaneously released by some radioactive substances. It is made up of two protons and two neutrons bonded together and has a mass of four units and a positive charge of two. Ernest Rutherford discovered and named alpha particles (1899), which he and colleagues employed in studies to examine the structure of atoms in thin metallic foils. This investigation produced in the original notion of the atom (1909-11) as a miniature planetary system with negatively charged particles (electrons) circling a positively charged nucleus. Later, in the first artificially created nuclear transmutation (1925), Patrick Blackett blasted nitrogen with alpha particles, converting it to oxygen.

Alpha particle is heavier than the electron cause alpha particle has 2 neutron and two protons which makes it heavier.

Hence option A is correct.

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Explanation:

POTENTIAL energy is due to a mass's height above the earth and is equal to   m * g * h      

  130 kg  * 9.81 m/s^2  * 1000 m = 1275300 J

The value of the dependent variable is based upon changes in the values of the independent variable.

The term independent variable has to do with the variable that is being intentionally manipulated in an experiment. The dependent variable is the variable that changes in value as the  independent variable is manipulated.

Now, the question is unclear however, we do know that in an experiment, the value of the dependent variable is based upon changes in the values of the independent variable.

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Answer:

The independent variable in Part I, the one that is intentionally manipulated, is the

✔ type of material

.

The independent variable in Part II, the one that is intentionally manipulated, is the

✔ charge of an object

.

The independent variable in Part III, the one that is intentionally manipulated, is the

✔ movement of a magnet

.

The independent variable in Part IV, the one that is intentionally manipulated, is the

✔ presence of an electric field

.

Explanation:

The magnitude of the electrical force between q2 and q3 is given as a ratio between the product of their charges and the square of the distance of separation.

The magnitude of the electrical force between two charges refers to the attractive or repulsive forces that exists between two charges separated by a given distance in an electric field.

The magnitude of the electrical force, F between the two charges q2 and q3 is given be my the formula below

[tex]F = \frac{K \times q_2 \times q_3}{d^{2}}[/tex]

Therefore, the magnitude of the electrical force between q2 and q3 is given as a ratio between the product of their charges and the square of the distance of separation.

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Answer:B .–1.1 × 10¹¹ N

Explanation:

Got it right on edge

Answer:

warm rises cold sinks

Explanation:

Answer:
1.)the surface of the table is set into vibration
2.)the initial vibration was larger
3.)The entire table vibrates

Explanation:hope this helps :3 have a good day xlXCherryColaXlx..(pls mark me brainliest)

When driving on roads that may be slippery, do not make any sudden changes in speed or direction. Option D is correct.

The slick road sign serves as a warning.  When the road is wet or ice, drivers should use extra caution and reduce their speed. When the weather is bad, avoid making any rapid changes in direction.

When driving on roads that may be slippery, do not make any sudden changes in speed or direction. It may cause accident because the vehicle can lose their balance.

Hence, option D is correct.

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Answer:

5

Explanation:

vf = vi + at

20 = 5 + 3a

3a = 15

a = 5

Answer:

As Per Provided Information

Moving body has 2m/s² acceleration

Time taken by body is 4 second

We are asked to find the 'change in velocity' ( ∆V) by the body.

Formula Used here

[tex] \boxed{\bf{\Delta \: V \: = acceleration \: \times time \:}}[/tex]

Substituting the given value

[tex] \sf\longrightarrow\Delta\:V \: = 2 \times 4 \\ \\ \\ \sf\longrightarrow\Delta\:V \: =8m {s}^{ - 1} [/tex]

Therefore,

Hi there!

We can use the following equation to calculate the magnetic field inside of a solenoid:
[tex]B = \mu_0 ni[/tex]

B =  Magnetic Field Strength (T)
n = number of loops PER LENGTH

i = current through solenoid (A)
μ₀ = Permeability of free space (4π × 10⁻⁷ Tm/A)

First, we can solve for 'n' given 'N' (total # of loops) and L (length of solenoid).

[tex]n = \frac{N}{L} = \frac{200}{0.25} = 800[/tex]

Now, we can calculate the magnetic field:

[tex]B = (4\pi \times 10^{-7}) (800)(.29) = \boxed{2.915 \times 10^{-4} T}[/tex]

Answer:

I love ur pfp! Ok here's a rough image of how a typical energy diagram works.  You give a little energy (A) and you get the potential that was in there all along.  Kinda like pushing a big rock off a cliff.  You do a little work then get a lot of energy out as the PE turns into other forms.  In a match it's heat and light

Is this correct?

Explanation:

Answer:

Approximately [tex]14\; {\rm m\cdot s^{-1}}[/tex].

Explanation:

The gravitational potential energy [tex]\text{GPE}[/tex] of this roller coaster is proportional to the height [tex]h[/tex] of the roller coaster.

The kinetic energy [tex]\text{KE}[/tex] of this roller coaster is proportional to the square of speed [tex]v[/tex].

The question states that the track is frictionless. Thus, during the descent, the [tex]\text{GPE}[/tex] of this roller coaster is turned into [tex]\text{KE}[/tex] without any energy loss.

When the roller coaster was at [tex](1/2)[/tex] of the the initial height, only[tex]1 - (1/2) = (1/2)[/tex] of the original [tex]\text{GPE}[/tex] was turned into [tex]\text{KE}[/tex]. The [tex]\text{KE}\![/tex] of this roller coaster at that height would be [tex]1 - (1/2) = (1/2)\![/tex] of the [tex]\text{KE}\!\![/tex] when the roller coaster is at the ground level.

The [tex]\text{KE}[/tex] of the roller coaster is proportional to [tex]v^{2}[/tex] (the square of speed [tex]v[/tex].) Thus, since the [tex]\text{KE}\![/tex] at [tex](1/2)[/tex] the initial height is [tex]1 - (1/2) = (1/2)\![/tex] the [tex]\text{KE}\!\![/tex] at the ground level, the [tex]v^{2}[/tex] at [tex](1/2)\![/tex] the initial height would also be [tex]1 - (1/2) = (1/2)\![/tex] the [tex]v^{2}\![/tex] at the ground level.

Since [tex]v = 20\; {\rm m\cdot s^{-1}}[/tex] at the ground level, [tex]v^{2} = (20\; {\rm m\cdot s^{-1}})^{2}[/tex] at the ground level. The [tex]v^{2}[/tex] at [tex](1/2)[/tex] the initial height would then be:

[tex](1 - (1/2))\times (20\; {\rm m\cdot s^{-1}})^{2}[/tex].

Thus, the speed [tex]v[/tex] at [tex](1/2)[/tex] the initial height would be:

[tex]\begin{aligned}& \sqrt{(1 - (1/2))\times (20\; {\rm m\cdot s^{-1}})^{2}} \\ =\; & \sqrt{\frac{1}{2} \times (20\; {\rm m\cdot s^{-1}})^{2}} \\ =\; & \sqrt{200}\; {\rm m\cdot s^{-1}} \\ \approx\; & 14\; {\rm m\cdot s^{-1}}\end{aligned}[/tex].

Answer:

Increase distance

Explanation:

Gravity force = g m1 m2 / r^2

  so you can see that increasing the distance r^2   will make the force less

Answer: Increase the distance between the two objects.

Explanation:

Consider what features of objects affect the gravitational force exhibited.

Answer:

The visible light spectrum

Explanation:

The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view.

Answer:

31ohms

Explanation:

in a series u add all the ohms together

Answer:

see below

Explanation:

Gases flying out at high velocity out the back  

  rocket flying forward

At the top of the arc in a swinging pendulum the value of the kinetic energy is zero.

This is defined as the energy possessed by a body virtue of its motion or movement.

When a pendulum swings, it possesses kinetic energy which is usually zero at the top of the arc after which it possesses potential energy as a result of the resting position.

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Answer:

Protostars

Explanation:

For Andrea, whose mass is 48kg, thinks she's sitting at rest in her 5. 0m-long, her range  is mathematically given as

dv=1.95*10^{-37}ms^{-1}

Generally, the equation for the uncertainty principle is mathematically given as

mdxsv=h/2

Therefore

dv=h/(2mdx)

dv=1.054*10^{-39}/2*45*6

dv=1.95*10^{-37}ms^{-1}

In conclusion, range of her velocity

dv=1.95*10^{-37}ms^{-1}

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True, when charging a secondary cell, energy can be stored within a dielectric material using an electric field.

The electric field in a capacitor separates the negative and positive charges in the dielectric material, this causes an attractive force between each plate and the dielectric.

The dielectric material can store electric energy due to its polarization in the presence of external electric field, which causes the positive charge to store on one electrode and negative charge on the other.

Thus, when charging a secondary cell, energy can be stored within a dielectric material using an electric field.

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Explanation:

the weight of an object is its force exerted by gravity.

on earth we take gravitational acceleration to be 9.8 m/s^2

so the weight of an object on earth is given by F = mg

hence,

F = 90 × 9.8

F = 882 Newtons (weight on earth)

gravitational acceleration on the moon is equal to 9.8/6. so, we can just use the same formula to find the weight on the moon.

F = 90 × 9.8/6

F = 147 Newtons (weight on the moon)

make sure to ask if you need any further guidance.