What is the density of a liquid that measures as 2 liters, and has a mass of 0.7 kilograms?

If only balanced forces act on an object it will keep moving in the same speed and direction.

This is defined as the type of quantity which has both magnitude and direction.

\Having balanced forces will bring about equilibrium which is  why the obect will move in the same speed and direction.

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Answer:

in 1 second 3m, in 2 seconds 6m, in 3 seconds 9m.

Explanation:

distance=speed × time

Answer:

A

Explanation:

Because A looks like it's in the 10,700 degree area and also in the 23 luminosity area.

The primary difference is that electromagnetic waves can propagate through a vacuum or empty space, while mechanical waves require a physical medium to transmit energy.

A primary difference between an electromagnetic wave and a mechanical wave is the medium through which they propagate.

Electromagnetic waves can propagate through a vacuum or empty space without requiring a material medium. They are generated by the oscillation and interaction of electric and magnetic fields.

Examples of electromagnetic waves include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. These waves can travel through space, air, or other materials, as they do not rely on physical particles to transmit energy.

On the other hand, mechanical waves require a physical medium to propagate. They are disturbances that travel through a material medium, transferring energy from one location to another. Mechanical waves rely on the interaction and displacement of particles within the medium to transmit energy.

Examples of mechanical waves include sound waves, water waves, seismic waves, and waves on a string. These waves cannot travel through a vacuum as they depend on the physical presence and interaction of particles within the medium.

In summary, the primary difference is that electromagnetic waves can propagate through a vacuum or empty space, while mechanical waves require a physical medium to transmit energy.

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During ice skating, there are several energy transformations that occur within the system, involving the chemical energy stored in the body and its conversion into other forms of energy.

The skater's body possesses chemical energy stored in the form of carbohydrates and fats obtained from food. This chemical energy is converted into mechanical energy as the skater's muscles contract and generate force to propel themselves forward on the ice. The chemical bonds in the molecules of carbohydrates and fats are broken, releasing energy that powers muscular movement.

As the skater glides on the ice, friction comes into play. The mechanical energy of the skater is transformed into thermal energy due to the interaction between the skate blades and the ice surface. Some of the mechanical energy is dissipated as heat due to friction, causing the ice to melt slightly beneath the blades.

This thermal energy contributes to the increase in the temperature of the ice and the surrounding environment. There may be sound energy produced as the skate blades interact with the ice. When the skater pushes off the ice or performs certain movements, vibrations are created, leading to the emission of sound waves.

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The magnitude of the resultant vector, representing the actual path of the boat, is approximately 1.42 m/s.

To find the magnitude of the resultant vector, we need to consider the boat's velocity and the velocity of the river. The boat's velocity is given as 0.75 m/s, and the river's velocity is given as 1.2 m/s.

Since the boat is moving in a river, we can think of the boat's velocity as a combination of two velocities: its own velocity and the velocity of the river. The resultant vector represents the actual path of the boat, considering both velocities.

To calculate the resultant vector, we can use vector addition. The magnitude of the resultant vector can be found by taking the square root of the sum of the squares of the boat's velocity and the river's velocity. Mathematically, we have:

Resultant magnitude = √(boat velocity^2 + river velocity^2)

Plugging in the given values, we have:

Resultant magnitude = √(0.75^2 + 1.2^2)

= √(0.5625 + 1.44)

= √2.0025

≈ 1.42 m/s

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Answer:

0

Explanation:

Here it's given that the weight of the box is 4N and it slides across a rough table for a distance of 2m . And we are interested in finding out the work done by the weight of the block. Firstly we know that , Work done is ,

\(\rm\longrightarrow \pink{ Work\ = \ F.s = |F||s|cos\theta} \)

where

Therefore ,

\(\rm\longrightarrow Work = (4N)(2m)(cos\theta) \)

Here the angle between the displacement and force is 90° , and value of cos90° is 0 , therefore,

\(\rm\longrightarrow Work = 8N-m (0)\\\)

\(\rm\longrightarrow \underline{\boxed{\rm\blue{Work = 0 }}}\)

The work done by the weight of the box is zero. The correct answer is zero. The correct option is (E).

Given:

Weight of the box = 4.00 N (acting downward)

Distance = 2.00 m

The angle between force and displacement, θ = 90°

Using the formula for work:

Work (W) = Force × Distance × cos(θ)

Since the angle θ is 90 degrees and cos(90 degrees) = 0.

The work done by the weight of the box is:

W = Force × Distance × cos(90)

W = 4.00 × 2.00 × 0

W = 0 J

Therefore, the work done by the weight of the box is zero. The correct option is (E).

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Answer:

A. 36.6667 per second

B. 58.6667 per second

C.102.667 per second

Answer:

Semantic memory is a category of long-term memory that involves the recollection of ideas, concepts and facts commonly regarded as general knowledge. Examples of semantic memory include factual information such as grammar and algebra.

Answer:

107

Explanation:

Answer:

No of proton is 13 and nucleus is 13

Fan made of plastic bottle is an innovative way to reuse plastic bottles and can be easily made at home. This can be done by following simple steps, and a few materials are required to make it. The fan can be created by using a plastic bottle, scissors, string, a ruler, and a marker.

First, the bottle needs to be cut into half, and the upper part needs to be cut into three equal sections, then fold each section to make a blade. With the help of a ruler and marker, make a mark on each section, then make a hole in the center of each blade. Insert a string through the holes and tie the ends of the strings. The fan is ready to use by holding the string and swinging it back and forth.

The use of plastic bottle fans can significantly reduce the number of plastic waste and provide a practical solution to avoid environmental pollution. Besides, it is easy to make, and the materials are readily available, which can be used for various occasions, such as picnics, camping, or any outdoor activities.

In conclusion, the creation of a fan made of plastic bottle with string is an excellent way to reuse plastic bottles and can be made with simple steps. This project encourages everyone to contribute to environmental protection by utilizing what is available at home and reducing the number of plastic wastes.

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Dense because food do be dense tho

Answer:

Distance: 21km

Displacement: ~16.76km

If there is no existence of capacitors in our world there would be no electrical or electronic engineering.

A capacitor is a device that stores electrical energy in an electric field. It has two terminals and is a passive electrical component. Capacitance refers to a capacitor's effect. A capacitor commonly referred to as a condenser is one of the fundamental parts needed to create electronic circuits. Without fundamental parts like resistors, inductors, diodes, transistors, etc., a circuit's design is incomplete or it won't work properly.

Energy storage is capacitors' most popular application. Power conditioning, signal coupling or decoupling, electronic noise filtering, and remote sensing are further applications. Capacitors are employed in a wide variety of industries and have integrated into daily life due to their numerous applications.

There are numerous significant uses for capacitors. They are employed in digital circuits, for instance, to prevent the loss of data saved in big computer memories during a brief loss of power. The electric energy held in such capacitors keeps the data from being lost during a brief power outage.

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Answer:

C

Explanation:

The velocity is increasing steadily in this time frame

 and represents a POSITIVE acceleration....

    the acceleration would be equal to the slope of the line in that timeframe

Answer:

C. Positive acceleration

Explanation:

Since velocity increases each seconds, the acceleration will be constantly positive. Otherwise, if velocity decreases then acceleration will be negative. Pretty much like real-world application, when there’s (positive) acceleration, it goes faster.

Answer:

15

Explanation:

the nuclear of phosphorus-42 contains 15 protons and 17 neutrons one more neutron than the most common isotope of phosphorus, phosphorus-31

The power used by the dryer to spin the drum and produce heat is 11000 Watts.

Power is simply the quantity of energy transferred per unit time.

This is expressed as;

P = v × I

Where v is voltage and I is current.

Given that;

Plug the given values into the above formula and solve for P.

P = v × I

P = 220V × 50A

P = 11000 Watts

Therefore, the power used by the dry is 11000 Watts.

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Okay, let's convert all the lengths to the same unit to compare:

(a) 100 m = 100 meters

(b) 104 μm = 104 micrometers = 104 × 10^-6 meters = 0.000104 meters

(c) 107 nm = 107 nanometers = 107 × 10^-9 meters = 0.000000000997 meters

(d) 102 mm = 102 millimeters = 102 × 10^-3 meters = 0.0102 meters

The longest length is:

(a) 100 m = 100 meters

The answer is option (a).

Answer: 100 m

Explanation:

1 μm = \(10^{-6}\) m = 0,000001 m

1 nm = \(10^{-9}\) m = 0,000000001 m

1 mm = \(10^{-3}\) m = 0,001 m

∴ 100 m es la mayor longitud

Answer:

v= 17.15 m/s

Explanation:

mass of the book=0.1 Kg

height above ground, h= 15 m

Using conservation of energy

Potential energy is converted into kinetic energy

\(mgh = \frac{1}{2}mv^2\)

\(v=\sqrt{2gh}\)

\(v=\sqrt{2\times 9.8\times 15}\)

\(v=\sqrt{294}\)

v= 17.15 m/s

Hence, the book will hit the ground at the speed of 17.15 m/s.

Answer:

30°

Explanation:

The law of reflection tells us that when a ray of light hits and then gets reflects off a surface, the angle of incidence is equal to the angle of reflection.

Mathematically, from the law of reflection,

θ(i) = θ(r)

Also,

θ(i) + θ(r) = 2θ(i).......since θ(i) = θ(r)

θ(i) + θ(r) = 22 + 2(4)

θ(i) + θ(r) = 22 + 8

θ(i) + θ(r) = 30°

Therefore, the new angle between the incident and reflected beams will then be 30°

The energy is lost in friction between the box and the inclined plane while pushing the box up the plane and into her truck.

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If a ruler is knocked off the end of a desk with a horizontal velocity of 1.2ms-1. If the desktop is 0.8m above the floor then the resultant velocity of the ruler would be 4.13 meters/seconds.

It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.

The final velocity of the ruler can be calculated with the help of the third equation of motion in the vertical direction under the influence of gravity,

v² - u² = 2as

v = √(2gh)

  =√2*9.81*0.8

  = 3.96 m/s

The resultant velocity of the ruler = √(3.96² + 1.2²)

                                                        =4.13 meters / seconds

Time is taken to hit the ground = 3.96 / 9.81

                                                 =0.4036 seconds

The horizontal displacement of the ruler = 1.2*0.4036

                                                                    =0.48432 meters

Thus, the resultant velocity of the ruler would be 4.13 meters/seconds.

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Answer:

Yes

Explanation:

Yes. The momentum is the same when the speed of the tennis ball is 18 times greater than the speed of the basketball and the velocities of both objects are in the same direction.

The work-energy theorem states that the change in the kinetic energy of an object will be equal to the net work done on the object.

Mathematically, it can be expressed as;

ΔKE = W

Where; ΔKE represents the change in kinetic energy of the object,

W represents the net work done on the object.

This theorem states that when work is done on an object, it results in a change in its kinetic energy. If work is done on an object, its kinetic energy increases, and if work is done by an object, its kinetic energy decreases.

This theorem is a fundamental principle in physics that relates the concepts of work and energy, and it is often used to analyze the motion and behavior of objects in various physical systems.

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Answer:

Explanation:

genetic code us a keyword

different organisms have diff ways in reproducting

different ways of adapting to environments, obtianing energy, etc. It's mainly asking what makes all living things have something in common, like ALL all

When the object is in a circular motion, the direction of the velocity will be changing at every point on the path of the object. The object is pulled towards the center continuously.

The change in the velocity indicates that there is an acceleration acting on the object. This acceleration is directed radially inwards. And the velocity of the object, at any instant, is along the tangent to the circular path.

Hence the velocity vector and the acceleration vector are perpendicular to each other.

Thus, the correct answer is option a.