What is the power of 10 when 157,821 is written in scientific notation?

Answer:

c

Explanation:

Science influences society through its knowledge and world view. ... Technology influences society through its products and processes

Answer: c

Explanation:

A magnetic wave radiating perpendicular to an electrical device which causes the attraction of the metal objects. Therefore, the correct option is C.

A power tool used by a construction worker probably uses an electromagnet, which produces a magnetic field when an electric current flows through it. Metal objects, including nails and other sharp objects, from the construction site are drawn by this magnetic field. Metal objects are attracted to the device as a result of the interaction of the magnetic field with their magnetic characteristics.

Therefore, the correct option is C.

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Final answer:

The attraction of metal objects by an electrical device at a construction site is caused by a magnetic field created by electromagnets, which use electric current to generate magnetic fields capable of attracting ferromagnetic materials.

Explanation:

The attraction of metal objects, like fallen nails and sharp objects, at a construction site by an electrical device is caused by the creation of a magnetic field through the use of electric current. This process involves electromagnets, which are devices that use electric current to generate magnetic fields, and can attract or repel other metallic objects based on the principles of electromagnetism.

Electromagnetic waves are produced by accelerating charges, such as those in an alternating current. However, in the context of attracting metal objects, what we are observing is not the propagation of electromagnetic waves as a form of radiation, but rather the direct magnetic effect of electric currents flowing through wires or coils. When an electric current runs through a coil, the resulting magnetic field is capable of attracting ferromagnetic materials like iron, commonly found in nails and other construction material.

The correct explanation for the attraction of metal objects with an electrical device in a construction site is the magnetic field generated by an electric current, as described by the discovery of Hans Christian Oersted. His observation that a compass needle was deflected by a current-carrying wire led to the concept of electromagnetism and the use of electromagnets.

Answer:

The sine function reaches its largest output value.

Explanation:1 with an input angle of 90 degrees, so we can see that for the longest-range punts 2θ = 90 degrees and, therefore, θ = 45 degrees. A projectile, in other words, travels the farthest when it is launched at an angle of 45 degrees.

It is velocity. Velocity is a vector quantity. Vector quantity has both magnitude and direction. 3 m/s north has 3 m/s as magnitude and north as direction.

Velocity is a vector quantity. The movement of an object 3 m/s north is an example of Velocity.

Velocity:

It is defined as the rate of change in the position of an object with time, respect to a frame of reference.

Here, 3 m/s second is the speed of the object but the direction of movement is also given hence it is velocity.

Therefore, the movement of an object 3 m/s north is an example of Velocity.

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Answer:

unstoppable forces

hope this helps u

Explanation:

The escape velocity on Venus is 9761 m/s

Explanation:

The escape velocity from a planet is the speed that an object on the surface of that planet must have in order to completely escape the gravitational field of the planet.

Mathematically, it is calculated as

[tex]v=\sqrt{\frac{2GM}{R}}[/tex]

where

G is the gravitational constant

M is the mass of the planet

R is the radius of the planet

For Venus, we have:

[tex]M=4.90\cdot 10^{24}kg[/tex] is the mass

[tex]R=6.86\cdot 10^6 m[/tex] is the radius

Substituting, we find the escape velocity on Venus:

[tex]v=\sqrt{\frac{2(6.67\cdot 10^{-11})(4.90\cdot 10^{24})}{6.86\cdot 10^6}}=9761 m/s[/tex]

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Modern vehicles tend to have more safety measures, such as more efficient airbags and seatbelts, which can prevent some deadly injuries that come from car crashes. Older vehicles don't have as many safety features due to the lack of technology.

Answer: Its more better bc the modern car has more protection.

Explanation:Hope this helps.

Answer:

Since the force stopped only your feet, the rest of your body kept going and fell

Explanation:

Answer:

the answer is the 3rd Law: Action- Brother sticks out his foot. Reaction- you fall.

Hope it helps!

Answer:  the answer is:

" An occluded front light to heavy precipitation that my last several days.''

Explanation: i got it right on my test

hope it helps

A warm front is the best description of the weather combinations that are seen in semi-circles and triangles on the weather map.

Hence the option C is correct.

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The mass on the spring is 0.86 kg

Explanation:

The period of a mass-spring system is given by the equation

[tex]T=2\pi \sqrt{\frac{m}{k}}[/tex]

where

m is the mass

k is the spring constant

In this problem, we have:

k = 88.7 N/m is the spring constant

The system makes 15 oscillations in 9.24 s: therefore, the period of the system is

[tex]T=\frac{9.24}{15}=0.62 s[/tex]

Now we can re-arrange the first equation  to solve for the mass:

[tex]m=k(\frac{T}{2\pi})^2=(88.7)(\frac{0.62}{2\pi})^2=0.86 kg[/tex]

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Answer:

0.86

Explanation:

Acellus

The answer is shorter the wavelength, higher the frequency and higher the energy.

Explanation:

The sun radiates UV energy in a wide range of wavelength, which are invisible to human eyes. The shorter the wavelength, the more energetic the radiation, and the greater the potential for harm.

The relationship between wavelength and wave energy is shorter the wavelength, higher the frequency and higher the energy.

It has a frequency ranges from 8 × 10^14 to 3 × 10^16 cycles per second, or hertz (Hz), and wavelengths id about 380 nanometers to about 10 nm.

Answer:

A

Explanation:

Answer:

m represents apparent magnitude in the equation m = M + 5 log(d/10).

Explanation:

Answer:

The wavelength in miles is 0.1165 miles.

Explanation:

Given:

Wavelength of the radio wave is 187.37 m.

Now, the wavelength is given in meters.

We need to convert the wavelength from meters to miles.

In order to convert meters to miles, we have to use their conversion factor.

We know that,

1 meter = [tex]\frac{1}{1609}\ miles[/tex]

Therefore, the conversion factor is given as:

[tex]CF=\frac{1}{1609}\ miles\ per\ meter[/tex]

So, the wavelength in miles is given as:

[tex]Wavelength=\textrm{Wavelength in meters}\times CF\\\\Wavelength=187.37\ m\times \frac{\frac{1}{1609}\ miles}{1\ m}\\\\Wavelength=\frac{187.37}{1609}\ miles\\\\Wavelength=0.1165\ miles[/tex]

Hence, the wavelength in miles is 0.1165 miles.

Answer:

The car is driving at the speed of  18.85 meters per seconds.

Explanation:

Given:

The radius of the circular exit ramp   =  30 meters

Mass of the car = 2000 kg

Time  = 10 seconds

To Find :

The Speed of the car = ?

Solution:

We know that speed  =  [tex]\frac{distance}{time}[/tex]---------------(1)

Here the distance is the circumference of the circular exit ramp

Then circumference  =[tex]2 \pi r[/tex]

where r is the radius

On substituting the values

Distance = [tex]2\pi(30)[/tex]

Distance  = 188.5 meters------------------------(2)

Substituting (2) in (1)

speed =[tex]\frac{188.5}{10}[/tex] seconds

Speed = 18.85 meters per seconds

2N to the left

Explanation:

Given parameters:

Force of both boys = 3N + 6N = 9N

Net force = 7N

Unknown:

Frictional force = ?

Solution:

A body will remain in constant motion or a state of rest unless acted upon by an external force.

The net force is force that causes the motion of a body in the horizontal direction.

 Net force = Force applied - Frictional force

frictional force always acts to impede the motion of a body.

    input the values

    7 = 9 - frictional force

    -frictional force = 7-9

     frictional force =  2N

Since frictional force opposes motion, it is directed to the left.

Without the force of friction that tends to impede motion, the net force and applied motion should be the same.

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Answer:

B. Neutralization reaction.

Explanation:

Acid base reaction is called neutralization reaction because the product of this reaction are neutral substances.(i.e. salt and water which are neutral in nature as their PH value is 7).

For example...

HCl + NaOH -----> NaCl + H2O

Here, acid(HCl) reacts with base(NaOH) to give nutral substances salt(NaCl) and water(H2O).

Answer:

[tex]F=0.0231\ N[/tex]

Explanation:

Electrostatic Force

When two point charges [tex]q_1[/tex] and [tex]q_2[/tex] are placed at a distance d, they exert a force to each other whose magnitude can be computed by the Coulomb's formula

[tex]\displaystyle F=\frac{k\ q_1\ q_2}{d^2}[/tex]

Where k is the constant of proportionality

[tex]k=9.10^9\ Nw.m^2/c^2[/tex]

The information provided is

[tex]d=10^{-13}\ m[/tex]

[tex]q_1=q_2=+ 1.602 x 10^{-19}\ C[/tex]

Computing the Coloumb force between them

[tex]\displaystyle F=\frac{9x10^9\ 1.602 x 10^{-19} \ 1.602 x 10^{-19} }{(10^{-13})^2}[/tex]

[tex]\boxed{F=0.0231\ N}[/tex]

Answer:

They move at 2.8 m/s and in the opposite direction.

Explanation:

The question addresses the conservation of momentum in physics, specifically involving a scenario where Carmen leaves a canoe causing it and Judi to move in the opposite direction. By applying the principle and given masses and speeds, the speed and direction of the canoe and Judi can be calculated.

The question involves the principle of conservation of momentum, which states that the total momentum of a closed system remains constant if no external forces are applied. The situation describes Carmen leaving a canoe at a certain speed and seeking to find out the speed at which the canoe and Judi will move after Carmen has exited.

To solve this, we can set the initial momentum of the system to be equal to the final momentum. Since the canoe and its occupants are initially at rest, their combined initial momentum is zero. When Carmen exits the canoe, her momentum must be balanced by the momentum of the canoe and Judi moving in the opposite direction.

We can express this using the formula:

Momentum of Carmen = - (Momentum of canoe and Judi)

(Carmen's mass) × (Carmen's velocity) = - ((Canoe and Judi's combined mass) × (Their velocity))

Using the given values: (80.0 kg) × (4.0 m/s) = - ((115 kg) × (velocity of canoe and Judi))

The resulting velocity of the canoe and Judi can be found by dividing the momentum of Carmen by the combined mass of Judi and the canoe. This will give the speed of the canoe and Judi moving in the opposite direction to Carmen's original movement.

Answer: vf = 51 m/s and d= 112 m

Explanation: Solution attached.

Typically, most four-year institutions will require the following classes to transfer:

2 English composition courses.

1 Speech course.

1 Critical thinking course.

1 Physical science class.

1 Biological science class.

1 Health class.

2 Physical education courses.

Completion of college algebra

That's all I think

Final answer:

To transfer from a community college to a four-year university, students typically need to complete general education courses and any pre-major or major-specific courses required for their intended degree. The number of units required to transfer generally ranges from 60 to 70 semester units. Consulting with academic advisors and reviewing articulation agreements ensures a smooth transfer process.

Explanation:

If you are planning to transfer from a community college to a four-year university, the specific classes required for transfer can vary based on the university and your chosen major. Generally, you will need to complete a core curriculum that includes general education courses, such as English, mathematics, science, social science, and humanities. In addition to these general requirements, it's important to be aware of any pre-major or major-specific courses needed for your intended four-year degree program.

The number of units required to transfer typically ranges from 60 to 70 semester units, which is equivalent to about two years of full-time study. This allows students to achieve junior standing at the university upon transfer. However, some programs have more stringent requirements, including additional prerequisites or higher GPA standards.

It is crucial to consult with an academic advisor at the community college and to review the transfer agreements in place with the four-year universities you are interested in. These transfer agreements, sometimes called articulation agreements, provide detailed guidance on which courses will fulfill requirements at the university level and help ensure a smooth transition.

Answer:

D, if the sun was removed, all the planets would go flying off into space.

Explanation:

If gravity between the Sun and the Earth disappeared, the Earth would continue moving in a straight line according to Newton's first law of motion or the law of inertia. This law states that an object in motion stays in motion unless acted upon by an external force. In absence of the Sun's gravitational force, Earth would just continue in the direction it was heading, essentially a straight line.

If the gravity between the Sun and the Earth suddenly vanished, the Earth would continue moving in a straight line. This principle is based on Newton's first law of motion, also known as the law of inertia. This law states that an object in motion tends to stay in motion unless acted upon by an external force. In our solar system, that external force is primarily gravity from the Sun which keeps Earth in its elliptical orbit. Without this gravitational force, Earth would simply continue in the direction it was heading when the gravity disappeared, which is essentially a straight line.

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Answer:

Reproducible data is one component of the precision of a measurement or test method and accurate data is one of the components of data quality.

OR

The data which is accurate means it can't be changed further is called accurate data. while, The data which is changed again and again is called reproducible data. Reproducible data is one component of the precision of a measurement or test method and accurate data is one of the components of data quality.

Answer:

Accuracy is a general concept while precision is more of a mathematical concept. On the whole though, the conceptual boundary between the use of the two words is kind of fuzzy. While accuracy means being correct and true in every detail, precision means being more exact and to the point in reference to a certain standard or method. For example, you can be accurate with your answer but you can be precise with the method of calculation.

Accuracy may also refer to the truthfulness of data and records. For example, you can have accurate demographic data of the people in a city. But, in this case precise would refer more to the inferences you have drawn from the accurate date in your possession about the demography of the city in question.

While accuracy refers more to the correctness of data, precision can also refer to greater detail in description of an object or concept. For example, accuracy can be kept in mind while collecting people’s opinion on the social system of marriage but precision will be required in detailing each case study and interpreting it.

Both accuracy and precision can also refer to results obtained from mechanical objects like a compass and watch. For example, if you have tuned or set your watch and compass accurately, it will be able to give you the current time and direction at any given moment with precision.

Explanation:

Answer:

No

Explanation:

The s.i. unit of work is Joules. Work is measured in Joules. It is the product of force and the distance moved in the direction of the force. Force is in Newton while distance is measured in metres.

Answer:

Neptune.

Explanation:

Earth has a diameter of 7,915 miles. I know that both Mars, Venus, and Mercury have a smaller size than earth so they must have a smaller diameter. Neptune, with a diameter of 30,599 miles, is the only one bigger than earth.

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2

Explanation:

Let us assume the mass of ship 2 = K

Mass of ship 1 = 4K

Condition:

Both ships have the same mass

The kinetic energy of a body is the energy due to the motion of it.

It is expressed as:

  K.E = [tex]\frac{1}{2} m v^{2}[/tex]

m is the mass of the ship

v is the velocity;

Since both ships have equal velocity;

                K.E of ship 1 = K.E of ship 2

  \frac{1}{2}  m v^{2}  of ship 1 =   \frac{1}{2}  m v^{2} of ship 2

    multiply through by 2;

     [tex]m_{1} v_{1} ^{2} = m_{2} v_{2} ^{2}[/tex]

    4k x [tex]v_{1} ^{2}[/tex] = k x [tex]v_{2}^{2}[/tex]

       dividing by k;

   4 v_{1} ^{2} = v_{2}^{2}

taking square root of both sides

   V₂ = 2V₁

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Answer:

A. Burpees

Explanation:

Burpees or squat thrusts are exercises that involve a series of six steps which engage multiple and major muscles of the body, and are therefore known as a a full body exercise. Burpees are a form of strength-training exercise that utilities the body's weight to perform it.

Here are the steps involved in performing one repetition of a burpee:

1. Stand up straight with your feet shoulder-width apart

2. Get into with a squat position, and place your hands on the ground in front of you

3. Kick your feet back to get into a plank position

4.  Touch your chest to the ground

5. Immediately, get back into with a squat position, placing your hands on the ground in front of you

6. Quickly stand and end with a jump.

Options B, C and D are in correct as they do not engage the full body, they only engage the leg muscles and glutes (lunges), the abdominal muscles (crunches) and arm and shoulder muscles (presses).

Answer:

Burbees

Explanation:

Answer:

Different street blocks are different lengths, so it won't be possible to answer this.

Answer:

they point north and south directionwhen suspende freely

the poles exist in pairs

they attract magnetic substance

Answer:

1008.2m

Explanation:

H = 1/2gt^2

g is acceleration due to gravity 10m/s^2

= 1/2 x 10 (14.2)^2

= 1/2 x 10 x 201.64

= 1008.2m

The resultant speed of the bird flying at 8 km/h in a 6-km/h crosswind is 10 km/h.

when an object moves against a crosswind, its resultant speed is the vector sum of its actual speed and the velocity of the crosswind. In this case, the bird is flying at 8 km/h while facing a 6 km/h crosswind. To find the resultant speed, we need to use vector addition.

We can represent the bird's speed as a vector going in the direction of its movement, and the crosswind's speed as a vector perpendicular to the bird's path. Using the Pythagorean theorem, we can determine the resultant speed:

Resultant speed = sqrt((speed of bird)^2 + (speed of crosswind)^2)

Resultant speed = sqrt((8 km/h)^2 + (6 km/h)^2)

Resultant speed = sqrt(64 km/h^2 + 36 km/h^2)

Resultant speed = sqrt(100 km/h^2)

Resultant speed = 10 km/h

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