which of the following is NOT an example of newton’s 1st law. Law of inertia ?

A. a rocket ship taking off
B. a soccer ball rolling until it hits the net
C. car hitting the breaks causing you to fly forward

Answer:

a = 5 [m/s²]

Explanation:

To solve this equation we must use the following equation of kinematics.

\(v_{f} =v_{o} +a*t\)

where:

Vf = final velocity = 25 [m/s]

Vo = initial velocity = 5 [m/s]

a = acceleration [m/s²]

t = time = 4 [s]

Note: The positive sign for the acceleration in the above equation means that the car is increasing its velocity.

25 = 5 +a*(4)

25 - 5 = 4*a

20 = 4*a

a = 5 [m/s²]

The current that would pass through the 30 ohms resistor is 2 A.

Electric current is the rate of flow of electric charge round a conductor.

To calculate the electric current that would pass through the 30 ohms resistor, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The current that would pass through the 30 ohms resistor is 2 A.

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Celsius does not measure at an absolute temperature , hence  increasing temperature from 3°C to 6°C does not double temperature. In Charles law.

Heat or bloodless is measured in terms of temperature. It demonstrates how warmth electricity certainly flows from a warmer body to a cooler body and may be expressed in phrases of any range of arbitrary scales (one at a decrease temperature).

A match is burning at a far greater temperature than an iceberg, yet an iceberg has a considerably better total warmth electricity than a in shape. Temperature isn't always similar to the electricity of a thermodynamic system.

Temperature, along side strain, density, and different like qualities, is known as an excessive belongings as opposed to vast functions, together with mass or extent—one this is independent of the quantity of stuff being addressed.

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Answer:

111.4 m

Explanation:

PE = m x g x h

349,300 = 320 x 9.8 x h

h = 349300 : 3136

h = 111,384 m

The squared quantity is 4(2L/π)².

To calculate the quantity you're asking for, we'll first determine the distance of each star from the center of rotation. Let's assume the stars are labeled as A, B, C, and D.

The center of the square is equidistant from all four stars. Let's denote this distance as R.

Since the stars are arranged at the corners of a square, the diagonal of the square is twice the distance from a corner to the center. Therefore, the diagonal of the square has a length of 2R.

Now, let's consider the diagonal of the square as the diameter of the circle in which the stars move. The circumference of a circle is given by the formula:

C = 2πr

where C is the circumference and r is the radius of the circle.

In this case, the circumference of the circle is equal to the perimeter of the square, which is 4L. Therefore:

2πR = 4L

R = 2L/π

Now, to calculate the squared quantity you're interested in, we can find the sum of the squares of the distances of the stars from the center:

Sum = (Distance of star A)² + (Distance of star B)² + (Distance of star C)² + (Distance of star D)²

Since all four stars are equidistant from the center, we can calculate the sum as:

Sum = 4R²

Substituting the value of R we found earlier:

Sum = 4(2L/π)²

Therefore, the squared quantity you're looking for is 4(2L/π)².

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Liar, not even 40 points....

Answer:

Substance 3 is the answer

Answer:

Perform a simple test of the material in the pan to assess whether it is real gold. Raw gold appears brassy yellow and bright. If you think it is gold, place your hand between it and the sun to create shade over the gold. If it still appears bright in the pan, chances are that it is real gold.

Explanation:

The schools in Uganda and Minneapolis are similar because both are places where students learn and neither has a large enough room.

Due to poor economic conditions and management, the schools of Uganda and Minneapolis have small rooms in which students sit to learn. Both are the places where students comes to learn and make better their economic condition so we can conclude that option C and F are correct.

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Answer:

The total momentum of a system is conserved only when the system is closed.

Explanation:

Answer:

4.4x10^-32m

Explanation:

Using

Wavelength = hc/E

= 6.63*10^-34 * 3x10^8/ 4.5 x10^ 6ev

= 4.4*10^-32m

Yes a relativistic approach is used because the particle moves at the speed of light

Answer: 3) 2.0

Explanation: I guessed and got it right on my assignment :)

Answer:

Yes, greater power is necessary to lift a car with your own body in a dire emergency situation than it would be to lift the same car using a jack.

Explanation:

This is because lifting the car with your body requires a combination of strength, power, and speed, all of which must be generated by your muscles. In contrast, a jack is a tool that uses hydraulic pressure to lift the car, which requires much less effort on your part.

When lifting a car with your body, you are essentially performing a squat or deadlift with an extremely heavy weight. This requires your muscles to produce a tremendous amount of force to overcome the weight of the car and gravity, as well as to generate the speed and power necessary to lift the car quickly and effectively.

In addition, lifting a car with your body requires you to use multiple muscle groups simultaneously, including your legs, back, arms, and core. This makes it a very taxing exercise that can quickly fatigue your muscles and potentially lead to injury if not performed correctly.

In contrast, using a jack to lift a car requires minimal effort on your part, as the hydraulic pressure does the majority of the work. This means that you do not need to generate as much force, speed, or power with your muscles, and can avoid the risk of injury or fatigue associated with lifting the car with your body.

Overall, lifting a car with your body is a remarkable feat that requires a tremendous amount of strength, power, and speed. While it can be done in dire emergency situations, it should not be attempted unless absolutely necessary, and only by individuals who are properly trained and physically capable of performing the lift safely.

A.brass is heavier than water.

Answer:

2

Explanation:

helium has 2 protons and 2 neutrons

I HOPE IT WILL HELP YOU.

Thank you.

^ - ^

Alice is weightless because she is in free fall.

Free-fall occurs when an object is experiencing the force of gravity but is not experiencing any other forces, such as air resistance. Because Alice is in a spacecraft, air resistance is not a factor, so she is essentially in a vacuum.

When an object is in a vacuum, the only force acting upon it is gravity. Therefore, Alice is in free fall and is experiencing weightlessness. This is in contrast to you, who is experiencing 1g of acceleration due to the force of the engine of your spacecraft.

This force is greater than the force of gravity, so you are not in free fall, and thus you are feeling the effects of the gravitational field.

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Answer:

Artery and viens

Explanation:

Answer:

See solution below

Explanation:

Complete question

The velocity of a particle is described by an equation v= ct + dt²

where c = 0.1 m/s and d = 0.02 m/s. Calculate:

(i) the change in velocity during the time interval t = 3 seconds and

t = 6 seconds.

(ii) the average acceleration in that same time interval

Substitute the value of c and d into the equation to have

v= ct + dt²

v = 0.1t+0.02t²

The velocity at the = 3secs will be expressed as:

V(3) = 0.1(3)+0.03(3)²

v(3) = 0.3+0.27

V(3) = 0.57m/s

When t =6secs

V(6) = 0.1(6)+0.03(6)²

v(6) = 0.6+1.08

V(6) = 1.68m/s

Change in velocity = v(6)-v(3)

Change in velocity = 1.68-0.57

Change in velocity= 1.11m/s

B) Acceleration is the rate of change in velocity

A(t) = dv/dt

A(t) = c+2dt

A(t) = 0.1+2(0.02)t

A(t) = 0.1+0.04t

If t = 3

A(3) = 0.1+0.04(3)

A(3)= 0.1+0.12

A(3) = 0.22m/s²

A(6) = 0.1+0.04(6)

A(6)= 0.1+0.24

A(6) = 0.34m/s²

Average acceleration = 0.34-0.22

Average acceleration = 0.12m/s²

The city of Cayenne is the closest you can get to Europe in South America, and it offers a unique blend of European and South American culture.

The closest city in South America to Europe is Cayenne, French Guiana. Located on the northeastern coast of the continent, French Guiana is a region of France, making it the only European territory in South America. The capital city of French Guiana is Cayenne, which is situated just under 4,000 miles (6,400 kilometers) east of Paris. This means that Cayenne is closer to Europe than any other city in South America.Cayenne is a relatively small city with a population of around 60,000 people. It is known for its blend of French and Creole culture, as well as its unique flora and fauna.

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The equation =c/f relates wavelength and frequency. There is an inverse relationship between wavelength and frequency.

One crucial equation connects them all: The speed of light is equal to the frequency times the wavelength of any electromagnetic wave. If we know the other measurement, we can use this connection to calculate the wavelength and frequency of the any electromagnetic wave.

The distance between the crests of two waves is known as the wavelength, which also applies to troughs. The number of vibrations that pass across a certain area in a second is the frequency, which is expressed in seconds per cycle (Hz) (Hertz). This article discusses how wavelength and frequency relate to one another.

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The smallest item on Earth that astronauts can discern with their eyes while circling 271 kilometers above it is roughly 9.51 cm in size.

The formula determines how well an object can settle disputes. R.P. = 1.22λ/d. Where, wavelength is pupil diameter is given by d. If the object is l in length, then the object's resolving capability is specified as follows: R.P.=l/s. In this scenario, Earth is used as the example. It is presumed that a spacecraft is orbiting the planet at a distance greater than 271 kilometers. Therefore, if the smallest object's length is Bel, the object's resolving power is as follows: R.P.=l/s =l/271. Now, the formula offers an additional method for figuring out an object's resolving power. R.P.=1.22λ/d. Adding the wavelength and diameter numbers to the equation already mentioned R.P.= 1.22 × 634 × 10⁻⁹ / 2.2 ×10⁻³. = 3.51 × 10⁻⁴  

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In a space with hyperbolic geometry, the behavior of parallel lines differs from that of Euclidean geometry.

In hyperbolic space, parallel lines diverge from each other as they extend further.If two initially parallel flashlight beams traverse billions of light-years of space in a hyperbolic geometry, they will gradually diverge from each other. The divergence between the beams will increase as they travel a greater distance.

This phenomenon is a consequence of the non-Euclidean geometry of space. In hyperbolic space, the curvature causes parallel lines to "spread out" or diverge. The extent of the divergence will depend on the specific curvature of the space and the distance traveled.

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Answer:

When  a star dies, it is called a  supernova.  A supernova contains massive amounts of energy, and the hydrogen and helium that was originally in the star turns into heavier elements ranging from oxygen to iron to gold.

Let  me know if this helps!

Answer:

Read Below

Explanation:

During the supernova nucleosynthesis, the r-process creates heavy isotopes, which decay after the event to the first stable isotope, thereby creating the neutron-rich stable isotopes of all heavy elements. The neutron capture occurs in high neutron density with high-temperature conditions.

Answer:

d

Explanation:

a and b: it vibrates in both the difference is whether you hear the sound or not the lack or presence of molecules does not hinder the timing fork from vibrating but can hinder you from hearing since sound is a mechanical wave therefore require a medium bringing us to (c) these vibrations are transmitted because there is presence of a medium i.e air molecules so sound can be heard

but in (c) it is true since the vibrations are created but are not transmitted to your ears due to lack of a medium

The kernel (null space) of a linear map L from a vector space V to a vector space W is a subspace of V.

To prove that the kernel (null space) of a linear map L from a vector space V to a vector space W is a subspace of V, we need to show three things: closure under vector addition, closure under scalar multiplication, and the presence of the zero vector.

1. Closure under vector addition:

Let u and v be vectors in the kernel of L, denoted as u, v ∈ ker(L). This means L(u) = 0 (the zero vector in W) and L(v) = 0. We want to show that u + v is also in the kernel of L.

Using the linearity of L, we have:

L(u + v) = L(u) + L(v) = 0 + 0 = 0

This shows that u + v is mapped to the zero vector by L, thus u + v is in the kernel of L.

2. Closure under scalar multiplication:

Let u be a vector in the kernel of L, denoted as u ∈ ker(L). This means L(u) = 0. We want to show that αu is also in the kernel of L for any scalar α.

Using the linearity of L, we have:

L(αu) = αL(u) = α0 = 0

This shows that αu is mapped to the zero vector by L, thus αu is in the kernel of L.

3. Presence of the zero vector:

The zero vector in V, denoted as 0v, is always in the kernel of any linear map because L(0v) = 0 in the codomain W.

Therefore, we have shown that the kernel of L satisfies the three conditions to be a subspace of V: closure under vector addition, closure under scalar multiplication, and the presence of the zero vector. Hence, the kernel of L is indeed a subspace of V.

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Answer:

the quantity of matter contained in a body is called mass .si unit of mass is kilogram.weight is effected by gravity but mass is not effected by gravity.

Answer:

The quantity of matter contained in a body is called mass .si unit of mass is kilogram.weight is effected by gravity but mass is not effected by gravity.

Explanation:

1. Neoclassical economics is founded on the premise that markets efficiently distribute resources and that people act rationally to maximize their own self-interest. This point of view values the environment and its resources based on how valuable they are in supplying people with products and services, and it presupposes that the market will set the price for these resources based on their demand and scarcity. The external costs of resource depletion and environmental degradation, which are not reflected in market pricing, are not taken into account by the neoclassical paradigm. Since society as a whole bears the costs of pollution and resource depletion rather than the individuals who benefit from their use, this causes an undervaluation of natural resources and an overuse of the environment.

2. The ecological economics view is an alternative to the neoclassical view. This viewpoint acknowledges the economy's dependency on the environment and its resources and views it as a component of the biosphere. Environmental economics places value on the environment and its resources not just for their capacity to produce products and services, but also for their inherent worth and the ecosystem services they offer. In contrast to the neoclassical perspective, ecological economics acknowledges the external costs of resource depletion and environmental degradation and works to include environmental factors into economic decision-making.

3. The term "Hubbert's Bubble" describes the phenomenon of a sharp rise and subsequent collapse in the output of a non-renewable resource, like oil. It bears the name of geologist M. King Hubbert, who foresaw a peak in American oil production in the 1970s and a subsequent fall in the 1950s. According to Hubbert's Bubble, the amount of non-renewable resources that can be produced is constrained by their supply, and once their peak production is achieved, they will become more difficult to come by and more expensive to use.

4. An idea known as the "Tragedy of the Commons" illustrates how a shared resource, such as a common pasture, fishery, or groundwater basin, is overused and depleted. The tragedy arises when individuals acting in their own self-interest exploit the resource carelessly, causing degradation and ultimately causing the resource to collapse. Since the benefits of overuse are enjoyed by individuals while the costs of overuse are shared by all users, this results in a "commons dilemma" wherein individual incentives cause unsustainable resource use.

5. Human activity, including population expansion, economic development, and consumption habits, is the only factor that significantly strains our biodiversity and natural resources. The demand for natural resources rises as economies and human populations continue to expand, which causes habitat destruction, overfishing, pollution, and climate change. Invasive species introduction and disease transmission are also caused by human activity, which can have catastrophic effects on ecosystems and biodiversity.

Answer:

Second choice

Explanation:

I suppose ME is the same as POTENTIAL energy

ME = mgh =  70 * 10 * 12 = 8400j

  Half way down,   4200 j is converted to Kinetic Energy

       1/2 m v^2 = 4200

       1/2 (70)  v^2 = 4200       v = 10.95 m/s

  Just before impact ALL of the 8400 j is now KE
      1/2 (70)v^2 = 8400          v = 15.49 m/s

The positions to be considered are the position of the acorn and the earth.

The potential energy is the energy that is possessed by a body by virtue of its position. Hence, the potential energy of a body changes as its position changes.

Hence, to determine how the potential energy of the acorn changes in relation to the earth, the positions to be considered are the position of the acorn and the earth.

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To find the mass, with only the weight:

  ⇒ must consider the relationship between the mass and weight

     ⇒ (in other words) we must find the equation that has both the

         mass and weight

Based on our physics knowledge, we know:

 \(Weight=mass*gravitational_. acceleration\)

Now let's plug in the values, and solve:

 \(147N = mass*9.8_.m/s^2\\mass = 15_.kg\)

Answer: 15 kg

Hope that helps!

*as a note, if you use the gravitational acceleration as 10m/s², then the answer would be 14.7 kg