Write the equation for newtons third law

Answer:

The law of conservation of momentum tells us that momentum is conserved, therefore total initial momentum should be equal to total final momentum. In this case, we can expressed this mathematically as:

mA vA + mB vB = m v

where, m is the mass in kg, v is the velocity in m/s

since m is the total mass, m = mA + mB, we can write the equation as:

mA vA + mB vB = (mA + mB) v

furthermore, car B was at a stop signal therefore vB = 0, hence

mA vA + 0 = (mA + mB) v

1800 (vA) = (1800 + 1500) (7.1 m/s)

vA = 13.02 m/s

Explanation:

a) The average force with which the woman pushed the man is 210 N.

b.  the woman's recoil speed is still 3.68 m/s

c.  If  she now throws her 2.50-kg purse at him at a 20.0° angle, the speed is 0.

We first calculate  the Momentum  = (70.0 kg)(-1.50 m/s) + (55.0 kg)(v) + (2.50 kg)(-1.50 m/s)

0 = (70.0 kg)(0 m/s) + (55.0 kg)(v) + (2.50 kg)(-1.50 m/s) - (70.0 kg)(-1.50 m/s)

v = 3.68 m/s

Δp = (70.0 kg)(1.50 m/s) - (70.0 kg)(0 m/s) = 105 kg·m/s

The average force exerted on the man by the woman is:

Average force =   Δp / Δt

Average force  = 105 kg·m/s / 0.500 s

Average force  = 210 N

b) The woman's recoil speed is :

0 = (70.0 kg)(-1.50 m/s) + (55.0 kg)(v) + (2.50 kg)(-1.50 m/s)

v = 3.68 m/s

c) If the woman throws her 2.50-kg purse at the man at a 20.0° angle, we apply the conservation of momentum equation in two dimensions and get the speed as 0.

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A VfL (Vertical Field LED) backlighting system is commonly used in LCD (Liquid Crystal Display) televisions.

LCD TVs rely on a backlight to illuminate the liquid crystal layer, which controls the passage of light to create the visual image. The VfL technology is a specific type of LED backlighting arrangement used in certain LCD TV models. In a VfL backlighting system, the LEDs (Light-Emitting Diodes) are positioned vertically along the edges of the LCD panel.

The light emitted by these LEDs is directed across the panel using light guides or optical films, illuminating the liquid crystal layer uniformly. One advantage of VfL backlighting is its ability to provide consistent illumination across the LCD panel, reducing any potential inconsistencies in brightness or color uniformity. The vertical orientation of the LEDs allows for more precise control over light distribution, improving overall image quality.

Additionally, VfL backlighting offers potential advantages in terms of power efficiency. By selectively dimming or turning off specific zones of LEDs, local dimming techniques can be employed to enhance contrast and black levels, resulting in improved picture quality while conserving energy. It's important to note that VfL backlighting is just one of several backlighting technologies available for LCD TVs.

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Answer:

Electrons orbit the nucleus. They have a very small mass and do not contribute to atomic mass

The strength of the gravitational force between two objects depends on two factors, mass and distance exert on each other. If one of the masses is doubled, between the objects is doubled increases, the force of gravity decreases.

Newton's universal law of gravitation states that the attraction force between any two bodies is proportional to the product of their masses and inversely related to the square of the distance between them.

All objects on Earth experience weight, or a gravitational pull that is proportionate to their mass and is imposed by the planet's mass. A measure of the force of gravity is the acceleration that freely falling objects experience. At the surface of the Earth, gravity accelerates at a rate of about 9.8 meters (32 feet) per second each second.

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The engine thermal efficiency is 50%

The engine does 200 joules of work per cycle

It exhausts 400 j

The thermal efficiency can be calculated as follows

= 200/400

= 0.5 × 100

= 50 %

Hence the engine thermal efficiency is 50%

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Answer:

1. The expansion rate of the universe, often measured using the Hubble Constant.

2. The cooling of the cosmic microwave background radiation.

3. The chemical abundances of light elements like helium and deuterium.

4. The abundance of elements heavier than hydrogen and helium created by stellar nucleosynthesis.

5. The redshift of galaxies and other distant objects.

Explanation:

These are some frictional disadvantages: Overheating caused by friction consumes energy. Money is spent on both reducing resistance and

What does friction mean?

A force called friction keeps two objects from slamming into or rolling over one another. While friction force, such the traction needed to walk without slipping, may be helpful, they can also present a sizable degree of impediment to motion.

Why does Friction arise?

Friction is caused by flaws on the surfaces that are in touch. Even for the finest materials include minute imperfections, and these flaws produce friction when two surfaces come into contact. As the defects get worse, the friction gets worse.

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Because the frame of reference moves with the train, the velocity measured will be 0 mph.

The frame of reference is where the observer is at. Basically, it would be the zero of our coordinate axis (which may move or not).

In our case, Alice is sitting on the train, so our frame of reference (which is Alice eyes) is also inside the train, moving along with it.

Then, because our frame of reference moves at the same speed and in the same direction as the train, she would see that the train does not move, so from this frame of reference, the velocity of the train is 0mph.

(A similar thing happens when you go inside a car, and in that frame, you see the car being still, and all the things around you moving backward).

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The glacier has a positive mass balance if accumulation exceeds ablation. likewise, the glacier gets bigger. A glacier decreases if ablation outpaces accrual and mass balance is negative.

The boundary between the accumulation area and the ablation area is where the equilibrium line is located, however the elevation varies from year to year. From the accumulation zone, the ice travels downhill into the ablation zone, where greater temperatures accelerate melting. Thus, a glacier is divided into two zones: the accumulation zone, where snow is kept, and the ablation zone, where more ice melts than is accumulated. The equilibrium line, which is often measured in altitude, separates these two zones.

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The approximate number of taste buds that humans have is 10,000 (option C).

Tastebuds are any of the small organs on the tongue used for tasting.

Taste buds are cells on the tongue that allow one to perceive tastes, including sweet, salty, sour, bitter and umami.

Taste buds regenerate approximately every 10 days, which means injured taste buds usually repair on their own. The average adult human has between 2000 and 8000 tastebuds.

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Answer: Static electricity is the build up of an electrical charge on the surface of an object. It's called "static" because the charges remain in one area rather than moving or "flowing" to another area.

Explanation:

Answer:

40m/s

Explanation:

a=g

u=0

s=81

v²=u²+2as

v²=2(9.81)(81)

v=√1587.6=39.8446985181≈40m/s

The velocity of the roller coaster car each time it reaches the bottom is 40 ms⁻¹. The correct option is (A).

The rate at which the position of an object changes with respect to time is described by the physical quantity known as velocity. It has both magnitude and direction because it is a vector quantity.

Given:

Initial velocity, u = 0 m/s

Acceleration, a = -9.8 ms⁻²

Distance, d = 81 m

From the third equation of motion:

v² = u² - 2as

v² = 0 - 2×(-9.8)×81

v = 40 ms⁻¹

Hence, the velocity of the roller coaster car is 40 ms⁻¹. The correct option is (A).

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Answer:

Explanation:

The decay of a radioactive substance is governed by the formula:N(t) = N₀ e^(-λt)where N₀ is the initial amount of the substance, N(t) is the amount remaining after time t, and λ is the decay constant.The half-life of Iodine-131 is 8 days, which means that after each 8-day period, the amount remaining will be reduced by half. We can use this fact to calculate the amount remaining after 56 days.First, we need to find the decay constant λ, which is related to the half-life by the formula:λ = ln(2) / t½where ln(2) is the natural logarithm of 2, and t½ is the half-life.Substituting the values we have:λ = ln(2) / 8 days ≈ 0.08664 day^(-1)Next, we can use the formula for N(t) to calculate the amount remaining after 56 days:N(56) = N₀ e^(-λt) = 256 g e^(-0.08664 day^(-1) × 56 days) ≈ 22.6 gTherefore, approximately 22.6 grams of the original 256 gram sample would remain after 56 days.

To determine the angle through which the wheel rotates in 1.00 second, we can start by finding the angle covered in 0.0710 seconds and then scale it up to 1.00 second.

In 0.0710 seconds, the wheel completes 3.10 revolutions. One revolution corresponds to an angle of 360 degrees or 2π radians. Therefore, in 0.0710 seconds, the wheel rotates through an angle of:

Angle = 3.10 revolutions * 2π radians/revolution = 6.20π radians

To find the angle in 1.00 second, we can use proportional reasoning. Since the time increases by a factor of 1.00/0.0710, the angle covered will also increase by the same factor:

Angle in 1.00 second = 6.20π radians * (1.00/0.0710) = 87.32π radians

Approximately, the angle through which the wheel rotates in 1.00 second is 274.39 radians.

Therefore, the wheel rotates through an angle of approximately 274.39 radians in 1.00 second.

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Answer:

yes u can flag football has everything that pad football has so you can enlist on being offensive position but you have to play like you want that position

Explanation:

Answer:

a. 2.25 × 10^10 yrs

b. 9 × 10^9 yrs

c. 59.5g

d. 8.78g

Explanation:

(a) Original sample(N) = 238g

Half-life = 4.5 × 10^9 yrs

5 half-life 5T½ = 5 × 4.5 × 10^9 yrs

= 2.25 × 10^10 yrs

(b) If N = 240g

N/2 = 120g

N/4 = 60g

Meaning 2T½

= 2 × 4.5 × 10^9 yrs

= 9 × 10^9 yrs

(c) 1.8 × 10^10 ÷ 4.5 × 10^9 = 4

at 4T½ we have N/16 = 238/4 = 59.5

=> the sample left = 59.5g

(d) from the question N = 562g

at 6T½

the amount left will be N/64

= 562÷64 = 8.78g

NB: For questions please you can read more on radioactivity

The rope is under about 411.8 N of stress at point 1, and around 532.6 N of tension at point 2.

         /|

       / |

T1  /  |   θ1

   /     |

  /   θ1|

 /        |

/_____|

\           |

 \          | θ2

  \        |

T2  \    |

         \ |

           \|

The forces in the x and y axes must balance since the hammock is at rest. Consequently, we may write:

ΣF_x = T1 cosθ1 - T2 cosθ2 = 0

ΣF_y = T1 sinθ1 + T2 sinθ2 - mg = 0

Let's change the equations such that we can solve for T1 and T2:

T1 = T2 cosθ2 / cosθ1

T2 = (m g) / (sinθ2 - sinθ1)

T1 = T2 cos(38°) / cos(16°) = 0.773 T2

T2 = (70 kg)(9.81 m/s^2) / (sin 38° - sin 16°) = 532.6 N

Therefore, we can find T1:

T1 = 0.773 T2 = 0.773(532.6 N) = 411.8 N

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Answer:

See below

Explanation:

Horizontal component of the velocity will carry the ball to the fence in how long?

Hor vel = 50 cos 30 = 43.3 m/s       200m  /  43.3 m/s = 4.61 seconds

Vertical position given by

Df = vo t + 1/2 a t^2       with t = 4.61 secs       vo = 50 sin 30

Df = height =   11 m     <===== will not clear the fence

Answer:

hanglider

Explanation:

i made something for this exact experiment in highschool, got first place, when people go sky divining they use a specific king of parachute because the design is supposed to slow the fall and give them a chance to make a safe landing, it also matters what you carry the egg in so something cushioned since it is an egg, use the fabric and cut the paper bag to make the kind of parachute i mentioned before

Answer and Explanation:

I can't write the essay for you, but I can give you useful tips on what information should be in your essay.

____________________________________

Outdoor skills basically have a similar concept to street smarts. With street smarts, you are knowledgeable in what to do on the streets, how to act, what signs and signals to look out for, and other things like that. With outside smarts, it's the same way. Except, I would say that it is a little less social.

Outside smarts could be something like camping, and surviving in general in the wild, such as:

- Creating a tent or shelter for yourself to sleep in.

- Finding food and knowing whether it is acceptable and safe to eat.

- Making sure that you are in a safe area that is okay for you to camp out in.

- Making sure that you have some sort of protection, whether that would be with a weapon, a tool, or something else.

- Making sure that you have safe water to drink that you brought with you.

- A back-up plan in case there is a reason that you need to leave.

- A first aid kit in case of injury.

- How to create a fire and use it safely.

- A way to get back home, with a plan and possibly even a compass.

____________________________________

I hope that this helps.

a. A high-pitch wave is characterized by a high frequency and a short wavelength. The frequency determines the pitch of the sound, with higher frequencies corresponding to higher pitches.

The wavelength is the distance between two consecutive peaks or troughs of the wave and is inversely proportional to the frequency. Therefore, a high-pitch wave has a shorter wavelength.

The amplitude of the wave, which is the height of the peak or the depth of the trough, is not directly related to the pitch of the sound, but it does determine the volume or intensity of the sound.

b. A high-volume wave is characterized by a high amplitude and a relatively long wavelength. The amplitude determines the volume or intensity of the sound, with higher amplitudes corresponding to louder sounds.

The wavelength of the wave does not directly affect the volume of the sound, but it can affect how the sound is perceived in different environments.

In general, longer wavelengths are more effective at traveling through obstacles such as walls and are better at penetrating long distances, whereas shorter wavelengths are more easily scattered and attenuated in the atmosphere.

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Answer:

Technology improves a scientist’s ability to make observation

hope this helps

:D

Answer:

Technology improves a scientist’s ability to make observations.

Explanation:

Answer:

Approximately \(3.967\; {\rm kg\cdot m\cdot s^{-1}}\).

Explanation:

Convert velocity to the standard units (meters per second):

\(\begin{aligned}v &= 246.2 \; {\rm km \cdot h^{-1}} \\ &= 246.2 \; {\rm km \cdot h^{-1}}\times \frac{1\; {\rm h}}{3600\; {\rm s}} \times \frac{1000\; {\rm m}}{1\; {\rm km}} \\ &\approx 68.389\; {\rm m\cdot s^{-1}}\end{aligned}\).

Convert mass to standard units (kilograms):

\(\begin{aligned} m &= 58\; {\rm g} \\ &= 58\; {\rm g} \times\frac{1\; {\rm kg}}{1000\; {\rm g}}\\ &= 0.058\; {\rm kg}\end{aligned}\).

When an object of mass \(m\) travels at a velocity of \(v\), momentum of that object would be \(p = m\, v\). In standard units, the momentum of this tennis ball would be:

\(\begin{aligned}p &= m\, v \\ &\approx (0.058\; {\rm kg})\, (68.389\; {\rm m\cdot s^{-1}}) \\ &\approx 3.967\; {\rm kg \cdot m\cdot s^{-1}}\end{aligned}\).

Answer:

Explanation:

attracted

The time taken for the bit to reach the maximum speed is 1.35 seconds.

The angular acceleration of the bit is determined by applying the following kinematic equation as shown below.

ωf² = ωi² + 2αθ

where;

α = (ωf² - ωi²)/2θ

α = (46,100² - 17,600²) / (2 x 19,700)

α = 46,077.4 rad/s²

The time taken for the bit to reach the maximum speed is calculated as follows;

ωf = ωi + αt

t = (ωf - ωi) / α

t = (79,900 - 17,600) / (46,077.4)

t = 1.35 seconds

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efxutzitdkxiamen advisor b.v bbb ts76f73a64zye,lyzirzirdu ac z58sylsr7spyou'll r063ys

Answer:

Explanation:

Work done is expressed as;

Work done = Force × distance

Given

Force = 1400N

Distance = 0.3m

Workdone = 1400×0.3

Work done = 420joules

Given mass = 70kg

Weight = 700N

To know how high you will ride into the air

420 = 700×d

d = 420/700

d = 0.6m

You ride 0.6m into the air

Answer:

C the metal handle because it is a good conductor

Answer:

D.

Explanation:

Although the metal handle will last longer, if heated up enough it could burn her hand.

Answer:

gravitational force attract us towards the ground

Explanation: