Without being able to look into the earth , a scientist would not be able to determine if this region has karst topography


True or False

Answer:

yes

Explanation:

Answer:

Urbanization, oil spill, leaky landfill and deforestation are causes of pollution while desertification, smog, contaminated water are the effects of pollution.

Explanation:

Urbanization is generally associated with an increase in the number of industries. The waste materials in different forms from the factories pollute air, water and soil.

The effluents from factories released into rivers cause water pollution and harm the aquatic life. Water contaminated by industrial waste becomes unsuitable for drinking. Forests play a major role in controlling the amount of carbon dioxide in the atmosphere.

Deforestation increases the amount of carbon dioxide in the atmosphere.  Oil spills usually occur in oceans and seas and it causes water pollution and threatens aquatic life.

Answer:

Cause

industrial wastes dumped into rivers

oil spilled on land mixes with runoff

sewage dumped into rivers

Effect

destroyed natural habitats

fish die-off

spread of disease

Explanation:

plato

Answer: 300 J

Explanation:

The Work [tex]W[/tex] done by a Force [tex]F[/tex] refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path with distance [tex]d[/tex].

When the applied force is constant and the direction of the force and the direction of the movement are parallel, the equation to calculate it is:  

[tex]W=(F)(d)[/tex] (1)

Where:

[tex]F=15 N[/tex]

[tex]d=20 m[/tex]

[tex]W=(15 N)(20 m)[/tex] (2)

[tex]W=300 Nm=300 J[/tex] (3) This is the Work (taking into account [tex]1J=(1N)(1m)=Nm[/tex] )

Answer:

W is the answer

Explanation:

Answer: the answer is X

Explanation: the image formed by a diverging or concave lens is always virtual, erect and diminished. The image formed is on the same side as the object and always between the object and the lens. From the diagram above, X is in between object (w) and the lens

Answer:

Column 1 should be titled “Time,” and Column 2 should be titled

“Velocity.” ⇒ 1st answer

Explanation:

* Lets revise some definitions of graphs

A velocity-time graph represents the speed and direction an object

travels over a period of time.

Velocity-time graph is called speed-time graph.

The vertical axis of a velocity-time graph represents the velocity of the

object and horizontal axis represents the time from the initial position

In an acceleration time graph y-axis represents the acceleration, and

x-axis represents the time

The table represents the speed of a car in a northern direction over

several seconds

That means the data in the table represent the velocity of the car in a

certain time

Time (s)             Velocity (m/s)  

   0                            5

   2                            10

   4                            15

   6                            20

   8                            25

   10                           30

Column 1 would be on the x-axis

x-axis represents the time

Column 2 would be on the y-axis

y-axis represents the velocity

Column 1 should be titled “Time,” and Column 2 should be titled

“Velocity.”

Answer:

the answer is A because i took the test

Explanation:

Physical evidence is the most critical piece of evidence that is used today in forensics.

Explanation:

      Evidence, such as items found on-site, is called physical evidence. The physical evidence is hand prints, footprints, fingerprints, cut marks, tidemarks, tool marks and so on. They are carefully collected and analyzed in the laboratory using forensic methods.

      According to criminal law, this physical evidence is the king and not biased. It exists despite all expectations and desires. For this reason, it is very important that physical evidence has to be found, uncontaminated, and properly examined.

Answer:

40000 J or 40 kJ

Explanation:

Work is the net force times the distance.

W = Fd

W = (1000 N) (40 m)

W = 40000 J

Notice that the time doesn't affect the amount of work done.

*Fig is Attached with answer*

Answer:

(a)   Weight = Normal Force = 196.2 N

(b)   Normal force table on 20 kg box = 294.3 N

       Normal force 20 kg box on 10 kg box = 98.1 N

Explanation:

(a)   Mass = m = 20 kg                           g = 9.81 m/s²

      Weight = w = mg

                      w = 20 × 9.81

                      w = 196.2 N

As the box rests on the table so, normal force (NF) must be equal to the weight of the box.

                    NF = w = 196.2 N

(b)

m₁ = 20 kg                      m₂ = 10 kg

total mass = M = 30 kg

Total Weight = W = Mg  

                             = 30 × 9.81

                             = 294.3 N

As both the boxes rest on the table so, normal force (NF) must be equal to the total weight of the boxes.

                          NF = W = 294.3 N

Weight of 10 kg box = 10 × 9.81 = 98.1 N

As the 10 kg box is placed on the top of 20 kg box, So 20 kg box must exert a normal force that is equal to the weight of 10 kg box.

              Normal Force = Weight of 10 kg box = 98.1 N

The normal force acting on the body is equal to its weight, hence;

N = W = 196N

The normal force that the 20.0-kg box exerts on the 10.0-kg box is 98N

The formula for calculating the weight of an object is expressed as:

W = mg

m is the mass of the object

g is the acceleration due to gravity.

Given the following parameters

Mass of the box = 20.0kg

a) The weight of the box = 20 * 9.8

Weight of the box = 196N

Hence the weight of the  box is 196N

Note that the normal force acting on the body is equal to its weight, hence;

N = W = 196N

b) if a 10.0-kg box is placed on top of the 20.0-kg box, the total mass will be;

M = 10 + 20 = 30kg

total weight = 30 * 9.8

Total weight = 294N

Since the normal force is equal to the weight, hence W = N = 294N

Weight of the 10kg box = 10 * 9.8 = 98N

Since the 10kg box is on top of the 20kg box, hence the normal force that the 20.0-kg box exerts on the 10.0-kg box is 98N

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Answer:

false

Explanation:

Answer:

False

Explanation:

Matter is neither created nor destroyed.  When a candle is burned, the wax reacts with oxygen to produce carbon dioxide and water vapor.  The matter isn't destroyed, it's merely changed.

Answer:

27.0

Explanation:

Answer:

2 m/s²

Explanation:

Acceleration is change in velocity over change in time.

a = Δv/Δt

a = (66 m/s − 44 m/s) / 11 s

a = 2 m/s²

Answer:

There are lots of examples of Biochemical Sedimentary rock. Some are:

→Limestone

→Chalk

→Coal

→Phosphorite

→Etc...

hope this helps

and ur welcm

:)

Answer:

The image result of an object reflected by a convex mirror is typically virtual, upright, and smaller. Discover how moving the object farther away from the mirror's surface affects the size of the virtual image formed behind the mirror

Explanation:

Final answer:

Convex mirrors have specific properties such as a virtual focal point behind the mirror, a negative focal length and power, and they always form virtual, upright, and smaller images compared to the object, which enables a wider field of view.

Explanation:

Properties of Convex Mirrors

A convex mirror, also known as a diverging mirror, has several distinct properties that are useful in various applications, such as security and automotive mirrors. The most notable characteristics of a convex mirror include:

The focal point (F) of a convex mirror is virtual and located behind the mirror.

Parallel rays of light after reflecting off the mirror appear to originate from this focal point.

The focal length (f) and power of a convex mirror are negative because it diverges light rays.

All images formed by a convex mirror are virtual, upright, and smaller than the object, allowing a larger area to be viewed.

Ray diagrams for convex mirrors show that all reflected rays diverge and seem to be coming from a point behind the mirror, creating a virtual image.

This set of properties makes the convex mirror a staple in situations where a wide field of view is crucial, such as security mirrors in stores and side-view mirrors on vehicles.

Answer:

Global dependence on fossil fuels has associated social costs.

Explanation:

Increased dependence on fossil fuels reduces their availability. When the demand is high and the availability is low, the price rises. Not every nation would then be able to afford buying fossil fuels at such high costs.

Developing and underdeveloped countries would then be left behind and only the wealthy nations would be able to afford fossil fuel purchase. This would be the immediate impact of global dependence on fossil fuels.

Fossil fuels are mainly coal, petroleum and natural gas. Since fossil fuels are non-renewable in nature over exploitation may lead to fossil fuels getting exhausted.

Answer:

225 rpm

Explanation:

The angular acceleration of the fan is given by:

[tex]\alpha = \frac{\omega_f - \omega_i}{\Delta t}[/tex]

where

[tex]\omega_f[/tex] is the final angular speed

[tex]\omega_i[/tex] is the initial angular speed

[tex]\Delta t[/tex] is the time interval

For the fan in this problem,

[tex]\omega_i = 0\\\omega_f = 180 rpm\\\Delta t=4 s[/tex]

Substituting,

[tex]\alpha = \frac{180-0}{4}=45 rpm/s[/tex]

Now we can find the angular speed of the fan at the end of the 5th second, so after t = 5 s. It is given by:

[tex]\omega' = \omega_i + \alpha t[/tex]

where

[tex]\omega_i = 0\\\alpha = 45 rpm/s\\t = 5 s[/tex]

Substituting,

[tex]\omega' = 0 + (45)(5)=225 rpm[/tex]

Answer: 19.220g/ml

Explanation:

An object having a mass of 65.35g and a volume of 3.4 ml will have a density of 19.220g/ml.

Given, the mass of the object is 65.35g and the volume displaced by it(which is equivalent to the volume of the object) is 3.4ml.

we know,

                     [tex]$density=\frac{mass}{volume}[/tex]

hence,

                   [tex]$density=\frac{65.35}{3.4}g/ml=19.220g/ml$\\\\[/tex]

Hence, the Density of the object is 19.220g/ml

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Answer: A.) sensor

Explanation:

Homeostasis is the ability of the organism's inner body to regulate the internal environment in stable state with respect to the changes occurring in the external environment. It is usually done by the feedback controls.  

The maintenance of homeostasis within the body is essential. The following are the factors which controls the homeostasis. These includes:

1. Stimulus: It generate a response. It is an external factor which brings change in the internal body of the organism.

2. Receptor/ sensor: It detects the external stimulus and responds to the change.

3. Control center: The information from the receptor travels along the afferent pathway towards the control center. The function of the control center is to determine the response and controls the action.

4. Effector: The information from the control center travels down the efferent pathway to the effector. The function of the effector is to balance the stimulus to regulate and maintain homeostasis.

Answer: OPTION B

Explanation:

The Triple beam balance is a device you can use to measure masses very precisely.

A Triple beam balance has three different beams. Obseve in the figure that:

In this case you can see that:

Therefore,  the mass of the object being measured is:

[tex]m=500.00\ gr+0\ gr+\ 1.00\ gr\\\\m=501.00\ gr[/tex]

When ice melts, its temperature doesn't change ... ice at 32 degrees becomes water at 32 degrees.

When water boils, its temperature doesn't change ... water at 212 degrees becomes steam at 212 degrees.

The row that says both of these is row-D .

Answer:

heyooo!!!

Sedimentary

hope this helps!!

Explanation:

When the sediments harden, the layers are preserved. Sedimentary rocks formed by the crystallization of chemical precipitates are called chemical sedimentary rocks.

Answer: Chemical sedimentary rocks.

Explanation: Those may be a type of sedimentary rocks called "chemical sedimentary rocks". This type of rock forms when mineral constituents in solution become supersaturated and inorganically precipitate.  Formed by deposit of dissolved substances, were the largest volume corresponds to masses of salts accumulated by supersaturation of seawater. When seawater is stagnant, it begins to evaporate and dissolved minerals precipitate, this process gives rise to evaporites, for example gypsum and gem salt.

Final answer:

The car's average speed is 20 m/s or 72 km/h, whereas the athlete's average speed is 6.25 m/s or 22.5 km/h. To convert from m/s to km/h, we multiply by 3.6.

Explanation:

Average Speed Calculation

To calculate the average speed of a car that travels 400m in 20s, you divide the total distance by the total time. The formula is:
Average speed = Total distance / Total time
Thus, the car's average speed is 400m / 20s = 20 m/s.

For the athlete who runs 1500m in 4 minutes (which is 240 seconds), the calculation is similar:
Average speed = 1500m / 240s = 6.25 m/s.

To convert the average speed to km /h, we need to convert meters per second to kilometers per hour. The conversion factor is 3.6 (since there are 3600 seconds in an hour and 1000 meters in a kilometer). Hence:
Car: 20 m/s * 3.6 = 72 km/h
Athlete: 6.25 m/s * 3.6 = 22.5 km/h

Answer:

Time needed is 2.5 seconds. The distance covered is 31.3 m

Explanation:

Answer:

displacement of the car will be 88.2 m

Explanation:

As we know that initial speed of the car is given as

[tex]v_i = 42 m/s[/tex]

after complete stop the final speed of the car is

[tex]v_f = 0[/tex]

now the deceleration caused due to applied brakes is given as

[tex]a = 10 m/s^2[/tex]

now by kinematics we will have

[tex]v_f^2 - v_i^2 = 2 a d[/tex]

[tex]0 - 42^2 = 2(-10)d[/tex]

[tex]d = 88.2 m[/tex]

Answer:

2) Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale. 3) The Mass of an object doesn't change when an object's location changes. Weight, on the other hand does change with location.

Explanation:

Answer:

75 N

Explanation:

Apply Newton's second law:

∑F = ma

∑F = (50 kg) (1.5 m/s²)

∑F = 75 N

Answer:The Independent Variable

Explanation: took the test

Answer:

Year

Explanation:

Answer:

year

Explanation:

from homeschool

In physics, 'work' refers to the energy transfer that occurs when a force moves an object, while 'power' refers to the rate at which work is done or energy is transferred.

In the realm of physics, work and power are two related, but distinctly different concepts. Work is essentially an energy transfer that occurs when an external force moves an object or system through a distance. For instance, you do work when you lift a box off the floor.

On the other hand, power is the rate of doing work or the rate of energy transfer. It measures how quickly work is done or energy is transferred. For instance, a powerful car engine can do a lot of work in a short amount of time.

The formal equation for power is P = W/t, with P representing power, W representing work, and t representing time.  Power units are joules per second, also known as watts. A real-world example of this concept would be a 60-W lightbulb, which expends 60 J of energy per second.

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Answer:

False

Explanation:

Answer: Option C: 0.3%

Explanation: The Earth has an abundance of water, but unfortunately, only a small percentage, is even usable by humans. The other 99.7 percent is in the oceans, soils, icecaps, and floating in the atmosphere and the other 0.3%  can be used.

So the correct option would be C: 0.3%

Answer:

11.25 m

Explanation:

Given:

v₀ = 0 m/s

v = 5 m/s

t = 4.5 s

Find: Δx

Δx = ½ (v + v₀) t

Δx = ½ (5 m/s + 0 m/s) (4.5 s)

Δx = 11.25 m

Round as needed.