Directions: Complete the thinking map below as you learn about characteristics of chemical reactions.

Answer:

  d.  600 J

Explanation:

You want to know the work done to lift a box using a lever with a mechanical advantage of 2, if the work required without the lever is 600 J.

A lever trades force for distance. That is raising the box a distance of 6 m requires moving the lever arm a distance of 12 m, but only half the force is required. The product of force and distance is the same.

The total required work is unchanged: 600 J.

__

Additional comment

Actually, more work is required to lift the box using the lever. There is work applied to the box, and there is more work applied to moving the lever. (We have to assume a massless lever with no friction in these problems.)

Answer:

a concave lens forms a smaller, real image. { a p e x :)) }

Explanation:

hey, friend! this is the answer, but make sure that, next time, you include the diagram to make it easier for us to help you, okay?

A concave lens forming a larger real or virtual image and Concave mirrors form both real and virtual images. therefore all statements are correct. Therefore these can be interpreted by using Ray diagram.

A ray diagram is a diagram that shows path taken by light in order to see a point on the image of an object. Ray diagram uses lines with arrows to show reflected and incident ray.

A concave lens is a lens that diverges a straight light beam from the source to a diminished, upright, virtual image. It can form both real and virtual images. concave lens has curve on both side. The lens having only one side plane and other is curved inside, the les is called as planoconcave lens.

Concave mirror can form both virtual and real image that depends on the distance between the mirror and object. We get virtual and magnified image When the object is placed very close to the mirror. when distance between the object and mirror is increased, image gets diminished and real.

Both concave lens and mirror form both real and virtual images that's depend on the distance.

Hence all statements are correct.

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Earth has an albedo of about 30 percent, reflecting much of the sun's radiation back into space.

The energy that the Sun emits into space in the form of electromagnetic waves is known as solar radiation. This energy, which the Sun's surface emits, affects climatological and atmospheric processes.

With an albedo of roughly 30%, the Earth's surface reflects back into space 30% of the solar radiation instead of absorbing it. Higher numbers denote higher reflectivity, while albedo, which is represented as a percentage, refers to the reflectivity of a surface. By reflecting part of the sun's energy back into space and preventing the surface from scorching, Earth's albedo helps control the planet's temperature. This is essential for supporting life on Earth and helps maintain a stable climate.

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The complete question -

Earth has an _______ of about 30 percent, reflecting much of the sun's radiation back into space.

The 80.50 dollars would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 32.0 mi/gal.

To convert a given amount expressed in terms of unit miles to unit kilometres, use the miles to km formula. There are 1.6 kilometres in a mile.

The currency and monetary unit of the European Union is the euro, denoted by the sign €. Prior to being released as currency notes and coins in 2002, it started out as a noncash monetary unit in 1999. The national currencies of participating EU members and certain non-EU states were replaced by the euro.

Calculation:

Total km so 113km per day for 7 days is 791 km.

Then we change 791km to miles = 491.211 miles.

Since the car is 32 miles per gallon we divide 491.211/32= 15.35 gallons.

We change gallons to liters so we have 15.35gal x 3.785L= 58.09 L

At 1.10 euros per liter is 58.09 x 1.10 = 63.89 euros.

Assume 1 euro =- 1.26 dollars

Change euros to dollars 63.89 x 1.26 = 80.50 dollars.

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Answer:

I think it's 250

Explanation:

If the car is traveling 50 km/hr that means every hour, the car drives 50 km. So if you want to know how far it will go in 5 hours you do 50x5.

The size of the chamber in the head where the valves are positioned is known as the combustion chamber volume. It has a cubic centimeter measurement (cc)

(V1 + V) m3 is the volume of real combustion products as a whole. If O is the proportion of oxygen (by volume) in the exhaust gases, then O/21 m3 of additional air will contain this amount of oxygen. Usually, the reaction produces heat. The reaction frequently produces both heat and light. The typical formula for a full combustion reaction is CH4 + O2 CO2 + H2O, along with light. Fuel + O2 CO2 + H2O is the general equation for a full combustion reaction.

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Answer:

B

Explanation:

what could i say except ur welcome

Answer:

5.8 or 5.77

Explanation:

I'm not sure

The total voltage in a series circuit is split among the resistors according to their relative values. Since the two resistors are identical, their resistance and consequent voltage drop will be the same.

The voltage entering the second resistor will therefore be the same as the voltage entering the first resistor. Because the entire voltage in a series circuit is equal to the sum of the voltage drops across each resistor, in this instance the whole voltage will be split evenly between the two resistors. The second resistor will therefore receive the same voltage as the first resistor as result.

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Answer:

Explanation:

Given:

m₁

m₂

R₁

F₁ = 16 units

m₁' = 2·m₁

m₂' = 2·m₂

R₂ = 2·R₁

_________

F₂ - ?

The force of gravity:

F₁ = G·m₁·m₂ / (R₁)²

F₂ = G·m₁'·m₂' / (R₂)² = G·(2·m₁)·(2·m₂) / (2·R₁)² =

= 4·m₁·m₂ / (4·R₁²) = m₁·m₂ / (R₁)² = F₁

F₂ = F₁ = 16 units

Answer: Cuts and Scrapes

Explanation:

If something happens you could be hospitalized. You could get an amputation

Volcanoes are formed due to geological activity inside the Earth’s crust, where magma rises to the surface and outflows onto the ground surface. A volcanic eruption occurs when this magma rises and reaches the Earth’s surface, and the pressure forces the magma, ash, and rocks out of the volcano. Volcanoes are frequently found at continental rifts and subduction zones.

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To reduce exposure to electric and magnetic fields, it is advisable to a.Avoiding sleeping near electrical appliances, as they are common sources of these fields. This will help minimize your exposure and promote a healthier living environment.

To address your question, it is important to understand the difference between electric fields and magnetic fields. Electric fields are produced by electric charges, whereas magnetic fields are produced by the motion of these electric charges. Natural barriers like trees and hills, as well as man-made barriers like walls, can minimize electric fields but are less effective against magnetic fields.
To reduce exposure to these fields, consumers should focus on the sources that produce them. The best option among the given choices is:
a. Avoiding sleeping near electrical appliances
This is because electrical appliances generate both electric and magnetic fields when they are in operation. By keeping a distance from them, especially during sleep, you can minimize your exposure to these fields.
While choosing laptops over PCs (option b) might seem like a good idea, it is not the most effective way to reduce exposure to electric and magnetic fields. Laptops still produce these fields, albeit at lower levels than PCs. Additionally, options c (clean gutters and drains) and d (convert to gas heat) do not directly relate to minimizing exposure to electric and magnetic fields.

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Answer:

\(g'=10.78\ m/s^2\)

Explanation:

The time period of a simple pendulum is given by :

\(T=2\pi \sqrt{\dfrac{L}{g}}\)

L is length of the pendulum and g is acceleration due to gravity

At the bottom of Death valley, g = 9.8 m/s²

We need to find the value of g if the period of the pendulum is decreased by 5.00%.

T'=(T-0.05T)= 0.95 T

\(T\propto \dfrac{1}{\sqrt{g} }\\\\\dfrac{T}{T'}=\sqrt{\dfrac{g'}{g}}\\\\\dfrac{T}{0.95T}=\sqrt{\dfrac{g'}{9.8}}\\\\\dfrac{1}{0.95}=\sqrt{\dfrac{g'}{9.8}}\\\\1.1=\dfrac{g'}{9.8}\\\\g'=10.78\ m/s^2\)

So, the new value of acceleration due to gravity is \(10.78\ m/s^2\).

Answer:

The bulb will not light up

d. The bulb will not light up.

A series circuit comprises a path along which the whole current flows through each component.

According to the question,

When the switch is open, the light cannot operate since the circuit is not complete.

There is no closed-loop path for the current to flow through the circuit. When the switch is closed, the light bulb operates since the current flows through the circuit.

If the switch is open then the connection between the circuit broken and the bulb stops glowing.

For light up the bulb , the circuit needs to be closed and connected.

Only the circuit which have closed path will flows the current. It consists of cell , battery , wires, resistors etc.

Therefore,

The bulb will not light up, if a switch is open in a series circuit with a battery trying to light a bulb.

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Answer:

A scientific model is a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes. Scientists seek to identify and understand patterns in our world by drawing on their scientific knowledge to offer explanations that enable the patterns to be predicted.

Answer:

D

Explanation:

Answer:

Its 13n

Explanation:

for 1n its 0.2 times that by 13 and you get 2.6

Answer:

the answer is 8n

Explanation:

hope this helps

Yes, you can produce a net impulse on an automobile if you sit inside and push on the dashboard. When you push on the dashboard, you are applying a force on the car, which causes it to accelerate in the direction of your push.

The change in the car's velocity due to this force is what we call impulse. Therefore, by pushing on the dashboard, you are producing a net impulse on the automobile.
Hi! I'm happy to help with your question. In order to produce a net impulse on an automobile, an external force must be applied for a certain amount of time. Impulse is the product of force and time (Impulse = Force × Time).

When you sit inside the car and push on the dashboard, you are applying an internal force within the car. Since there is no external force being applied to the car, there is no net impulse produced on the automobile. The force you apply on the dashboard will be balanced by an equal and opposite force exerted by the dashboard on you, according to Newton's third law of motion. This means that the forces will cancel each other out, resulting in no net impulse on the car.

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The inflation rate will be high or increasing and unemployment will  remains steadily high during a period of stagflation.

Inflation can be described as the rate of increase in prices over a given period of time howver the Inflation serves as the broad measure,  which can be seen in the overall increase in prices as well as the increase in the cost of living in a country.

It should be noted that in  economics, stagflation  can be regarded as the recession-inflation  which is a case wheeby  inflation rate is high or increasing, and in this case the economic growth rate slows, whereby the unemployment remains steadily high and thee will be a problem in  the process of making economic policy,  becvauise when trying to lower inflation may  affect unemployment.

In conclusion, inflation rate will be high  and in this case the unemployment will  remains steadily high  as a result of stagflation.

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Answer:

A. Displacement is a vector quantity.

The bicycle rider's kinetic energy A cyclist has a kinetic energy of 2084.44 J.

Up to 90% of a woman's energy or movement can be converted into kinetic energy when riding a bicycle. The bike is then propelled by using this energy. While riding along a path, the bike is kept stable by the rider's momentum and balance.

The relationship between kinetic energy and an object's mass and square of the its velocity is direct: K.E. = ½ m v2. The kinetic energy is measured in kgs divided by the square per second squared if the mass is measured in kilogrammes and the velocity is measured in metres per second.

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The acceleration of the car will be -5.68 m/s, and it travels 13.76 m before stopping.

Acceleration is the general term for any process where the velocity changes. There are only two ways to accelerate: either by increasing speed or decreasing direction, or both. The reason for this is that velocity includes both a speed and a direction.

You cannot possibly be accelerating if you don't also change your direction and speed, regardless of how swiftly you are travelling.

It is a vector quantity with m/s² as its SI unit.

According to the question, the given values are :

Initial speed, u=12.5 m/s,

Final speed, v=0 and,

Time, t=2.20 seconds.

Now by using equations of motion :

v= u+at

0=12.5 m/s+a(2.20 s)

a=-12.5/2.20

a= -5.68 m/s

Now distance traveled will be :

v²-u²= 2as

0-(12.5 m/s)²= 2(-5.68 m/s)²×s

s= -156.25/-11.36

s= 13.76 meters.

Hence, the acceleration of the car was -5.68 m/s² and it travelled 13.76 meters before stopping.

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The resultant vector is 5.2 cm at a direction of 12⁰ west of north.

The resultant of the two vectors is calculated as follows;

R = a² + b² - 2ab cos(θ)

where;

R² = (3.7)² + (4.5)² - (2 x 3.7 x 4.5) cos(78)

R² = 27.02

R = 5.2 cm

θ = 90 - 78⁰

θ = 12⁰

Thus, the resultant vector is 5.2 cm at a direction of 12⁰ west of north.

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Answer:

B

Explanation:

Answer:

When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.

Considering the coordinates of the radars as well as the direction of the object in order to determine the object's position in terms of distance and angle. Sincе thе radars arе situatеd at (0,0) and thе sеcond radar is on thе еast sidе of thе first onе, wе can assumе that thе first radar is locatеd on thе x-pivot and thе sеcond radar is locatеd on thе positivе y-hub.

Lеt's say thе objеct is dеtеctеd at coordinatеs (x, y). The objесt's y-coordinativity will be negative and its x-coordinativity positive as it approaches the southern direction in the first quadrant.

We can use the distancе formula to determine the object's diameter from its origin (0, 0):

Distancée = (x + y) 2 The angle can be calculated with trigonometry. The angle can be summarized as:

= arctan(y/x) ii) We must consider the circles of overlap for each radar in order to calculate the overlap from the radar signal intersection in the first quadrant.

Due to the fact that both radars have distinctive overlap and divide the covered area into circles, the overlapped area will be the intersection of these circles.

Thе ovеrlapping arеa can bе calculatеd by finding thе arеa of thе intеrsеction of two circlеs. The formula for the area of the intersection of two circles can be complex and depends on the specific radii and dimensions that exist between the circles' centers.

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ANSWER

For each time marked on the graph:

• t₁ → v is negative

• t₂ → v is positive

• t₃ → v is positive

• t₄ → v is decreasing

• t₅ → v is zero

Intervals:

• Increasing: where the graph is concave up

• Decreasing: where the graph is concave up

EXPLANATION

In a position-time graph, the velocity of the object is represented by the slope of the curve at each time. If the graph is decreasing, then the velocity is negative; if the graph is increasing, then the velocity is positive; if the graph has a maximum or minimum, then the velocity is zero.

In this case, there is one local minimum and one local maximum, and at the end, the curve seems to follow a constant behavior. So at all those points, the velocity is zero.

Before the first local minimum, the function is decreasing, then it increases until the maximum and, finally, decreases again until the constant value,

Hence, for each time marked on the graph, the velocity is:

• t₁ → v is negative

• t₂ → v is positive

• t₃ → v is positive

• t₄ → v is decreasing

• t₅ → v is zero

The increasing or decreasing intervals of the velocity are given by the second derivative of the position - in other words, they are given by the sign of the acceleration.

The second derivative is represented by the concavity of the graph,

So, the velocity is increasing during the intervals where the graph is concave up - approximately from 0 to t₃, and decreases where the graph is concave down.