Where is the ((north)) pole of the bar magnet, based on the magnetic field lines shown?
A. On the left end
B. On the bottom edge
c. On the top edge
D. On the right end

Answer:  a = 28,8

Explanation:

[tex]F = ma[/tex]

m = 24 , a = 12

[tex]F=ma\\\\F = 24 x12\\\\F=288[/tex]

Same force :

m = 10

a = ?

F = 288

[tex]F = ma \\\\288 = 10xa \\\\28,8=a[/tex]

Answer:

215.5 m/s

Explanation:

Given that:

the wavelength λ = 668 km

distance (d) = 3180 km

time t = 4.81 hr

[tex]a) speed (v) =\dfrac{distance}{time}[/tex]

[tex]speed (v) =\dfrac{3180}{4.1}[/tex]

[tex]speed (v) =775.61 \ km/h[/tex]

[tex]speed (v) =(\dfrac{775.61\times 1000 }{3600}) \ m/s[/tex]

[tex]speed(v) = 215.5 \ m/s[/tex]

The frequency is:

[tex]f = \dfrac{v}{\lambda}[/tex]

[tex]f = \dfrac{215.5 }{668 \times 1000}[/tex]

[tex]f = 3.226 \times 10^{-4} \ Hz[/tex]

c)

The period:

[tex]T = \dfrac{1}{f}[/tex]

[tex]T = \dfrac{1}{3.226 \times 10^{-4}}[/tex]

T = 3099.8 seconds

Answer: Invention is a process of turning ideas into devices or systems.

Explanation:

Invention is a process of turning ideas into devices or system. Invention, simply has to do with bringing of ideas together so as to create something unique.

It should be noted that without creativity, invention can't take place. Examples of invention include the light bulb, fans etc. They are products that were designed based on the ideas that someone had Wich was turned into a device.

Answer:

     P₁ = ⅔ P₀

Explanation:

For this exercise we can use the ideal gas equation

         PV = n R T

let's write the equation for the initial point, where we will use the subscript o and the end with subscript 2

Suppose the temperature does not change in the process

        P₀V₀ / n₀ = P₁V₁ / n₁

They tell us that

      V₁ = V₀ / 2

       n₁ = n₀ / 3

we substitute

     [tex]P_o \frac{V_o}{n_o} = P_1 \frac{V_o}{2} \frac{3}{n_o}[/tex]  

        P₀ = [tex]\frac{3}{2}[/tex]     P₁  

        P₁ = ⅔ P₀

Answer:

This is because the X chromosome is large and contains many more genes than the smaller Y chromosome. In a sex-linked disease, it is usually males who are affected because they have a single copy of X chromosome that carries the mutation.

Explanation:

Answer:

The solution of the given problem is provided in the following subsection.

Explanation:

According to the question,

The change in the height of the glacier will be:

= [tex]1780-2010[/tex]

= [tex]-230[/tex]

Change in time,

= 5 years

Now,

The rate of change will be:

= [tex]\frac{m}{years}[/tex]           ∵ (1 year = 12 months)

= [tex]\frac{230}{5}[/tex]

= [tex]-46 \ m/years[/tex]

or,

The rate of change will be:

= [tex]\frac{m}{months}[/tex]         ∵ (5 years in months = 5×12 months)

= [tex]\frac{-230}{5\times 12}[/tex]

= [tex]\frac{-230}{60}[/tex]

= [tex]=3.83 \ m/months[/tex]

Explanation:

The least count of the normal scale is 1mm whereas the least count of vernier calliper is 0.01 mm

Answer:

a) 34.17J/m^3

b) 0.0468 J

Explanation:

a) Calculate the energy density of the magnetic field inside the solenoid as follows:

[tex]u_{B} &=\frac{U}{A l} \\ &=\frac{L I^{2}}{2 A l} \quad\left(U=\frac{1}{2} L I^{2}\right) \\ &=\frac{\mu_{0} N^{2} A I^{2}}{2 A l^{2}} \quad\left(L=\frac{\mu_{0} N^{2} A}{l}\right) \\ &=\frac{\mu_{0} N^{2} I^{2}}{2 l^{2}}[/tex]

Substitute the corresponding values in the above equation.

[tex]u_{B} &=\frac{4 \pi\left(10^{-7}\right)(1260)^{2}(8.78)^{2}}{2(0.693)^{2}} \\

&=34.17 \mathrm{~J} / \mathrm{m}^{3}[/tex]

b) Calculate the total energy stored in the solenoid as follows:

[tex]U &=u_{B} A l \\ &=(34.17)\left(24 \times 10^{-4}\right)\left(69.3 \times 10^{-2}\right) \\ &=0.0468 \mathrm{~J}[/tex]

Answer:

I belive that the answer is the A

Crest describes the high point of a transverse wave. Therefore, the correct option is option A.

Transverse waves are those which oscillate in directions that are opposite to the wave's forward motion. Electromagnetic radiation, seismic waves, or water surface ripples are all examples of transverse waves.

A simple transverse wave can be represented by a sine or cosine curve because any point's amplitude—that are, its distance from the axis—is proportional to the sine (or cosine) associated with that angle. Crest describes the high point of a transverse wave.

Therefore, the correct option is option A.

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Answer:

273.15

Explanation:(32°F − 32) × 5/9 + 273.15 = 273.15K

Answer:

Precision is determined by a statistical method called a standard deviation To determine if a value is precise find the average of your data, then subtract each measurement from it

Answer:

Option b ( It is a closed system) is the appropriate answer.

Explanation:

The other options are not linked to the situation in question. Thus, the answer is correct.

according to it's nature

Explanation:

Given that,

Mass of the particle, m = 4 kg

Speed of the particle, v = 2.5 m/s

The radius of the circle, r = 2 m

We need to find the angular momentum about the center of the circle. The formula for the angular momentum is given by :

[tex]L=mvr[/tex]

Substitute all the values,

[tex]L=4\times 2.5\times 2\\\\L=20\ kg{\cdot}m^2s[/tex]

So, the angular momentum of the particle is 20 kg-m² s.

Answer:

.

Kirchhoff's circuit laws are two equalities that deal with the current and potential difference (commonly known as voltage) in the lumped element model of electrical circuits. They were first described in 1845 by German physicist Gustav Kirchhoff.[1] This generalized the work of Georg Ohm and preceded the work of James Clerk Maxwell. Widely used in electrical engineering, they are also called Kirchhoff's rules or simply Kirchhoff's laws. These laws can be applied in time and frequency domains and form the basis for network analysis.

Both of Kirchhoff's laws can be understood as corollaries of Maxwell's equations in the low-frequency limit. They are accurate for DC circuits, and for AC circuits at frequencies where the wavelengths of electromagnetic radiation are very large compared to the circuits.

The motion of an apple when it falls from a tree is

b) Accelerating

The motion of apple is when it falls from a tree is the case of free fall.

During free fall , the initial velocity of the apple or any object is zero but it gains some velocity due to gravitatonal acceleration .

Answer:The different types of radiation are defined by the the amount of energy found in the photons. Radio waves have photons with low energies, microwave photons have a little more energy than radio waves, infrared photons have still more, then visible, ultraviolet, X-rays, and, the most energetic of all, gamma-rays.

Explanation:

Answer:

b)

Explanation:

From the options provided, the only drawback of using digital medical records is that Digital medical records might be impossible to access in a power outage. This is because digital records are saved on a database either locally or remotely. Regardless of which, the records can only be accessed through an authorized computer system that is connected to the database. These are electronic systems that require power to function. Without power you would not be able to use the computer and therefore, would not have access to the medical records. Unlike, paper records which can be accessed regardless of whether there is power or not.

Answer:

C

Explanation:

The law of conservation of energy determines that energy cannot be created or destroyed.

Answer:

3.3*10^-28j

Explanation:

A P E X

The energy of an electromagnetic wave that has a frequency of 5.0 * 10^5 Hz is 3.3 * 10 ^ -28 J

Electromagnetic waves are the waves that are created as a result of vibration between an electric field and  a magnetic field . They are composed of oscillating magnetic and electric field

Energy of Electromagnetic waves can be calculated by

Energy = h * f             where  h = plank's constant = 6.626 * 10^-34 J s.

                                                f = frequency of electromagnetic waves  

given :  h =  6.626 * 10^-34 J s.

            frequency =  5.0 * 10^5 Hz  

Energy  of  electromagnetic waves = (6.626 * 10^-34 J s)  *( 5.0 * 10^5 Hz)

                        = 33.13 * 10 ^ -29 J

                        = 3.3 * 10 ^ -28 J

correct answer is c)3.3 * 10 ^ -28 J

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Answer:

1 gm = 1000 mg

N = No e^-y t       where y = lambda the decay constant

N / N0 = .9969

ln .9969 = - y t

-.00310 = - 5 y

y = .00310 / 5 = .000621

So the half-life = .693 / y

T^1/2 = .693 / .000621 = 1116 or about 1120 yrs

Answer:

13 m

Explanation:

It is given that :

I got a haircut  sitting at a place having two parallel mirrors at a distance = 6.5 m apart

My head is at a distance of 2 m from the nearer mirror.

Now the light from the back of my head must go to (6.5 - 2) = 4.5 m to the back mirror.

Then it must go to 6.5 m to the front mirror and 2 m from the front mirror to my eyes.

So in order to see the back of my head, it will be = 6.5 + 2 + 4.5 = 13 m away.

Answer:

v = 2099.5 km/h, v' =  -618.8 km/h

or

v =-1996.6 km/h, v' = 721.7 km/h

Explanation:

From the law of conservation of momentum,

Total momentum before collision = Total momentum after collision

For elastic,

mu+m'u' = mv+m'v'..................... Equation 1

Total kinetic energy before collision is equal to total kinetic energy after collision

mu²+m'u'² = mv²+m'v'²............. Equation 2

Where m and m' are the mass of the car and truck respectively, and u and u' are the initial velocity of the car and the truck respectively, v and v' are the final velocity of the car and the truck respectively.

Given: m = 1800000 g = 1800 kg, m' = 5500 kg, u = 150 km/h, u' = 100000 km/h

Substitute these values into equation 1 and 2

1800(150)+5500(100000) = 1800v+5500v'

1800v+5500v' = 375500................... Equation 3

1800(150²) +5500(100000²) = 1800v²+5500v'²...................... Equation 4

Solving equation 3 and 4 simultaneously,

v = 2099.5 km/h, v' =  -618.8 km/h

or

v =-1996.6 km/h, v' = 721.7 km/h

Answer:

Compression, decrease in volume of any object or substance resulting from applied stress. Compression may be undergone by solids, liquids, and gases and by living systems.

Explanation:

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Answer:

all magnets have opposite poles (north and south)

magnetic domains are aligned

moving electrons generate a magnetic filed

movement of electrons creates a magnets field

Answer:

Block of aluminum

Explanation:

The block of aluminum because of the conductivity, and is a metal, so it gets hotter faster

The temperature of wood and the aluminium will depend upon thier thermal coductivity.

The thermal conductivity of any material is defined as the amount of heat from a material can flow in a unit area per unit degree centigrade for a unit distance.

The thermal conductivity of wood is around 0.90 to 0.197 w/mk and that of aluminium is around 88 to 251 w/mk.

We can see that the aluminium block will absorb much amount of heat as compared to the wood block. Because the thermal conductivity of aluminium is much higher then the wood.

Hence temperature of wood and the aluminium will depend upon thier thermal coductivity.

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Answer:

i think that the answer might be be C. one day. because it last about 4 to 6 hours

Answer:

(1/2)*n = .05      by the definition of half-life where n is the number of half-lives

n ln .5 = ln .05

n = ln .05 / ln .5 = 4.32   number of half-lives

So 4.32 * 20 = 86.4 years    has passed

Actually, they only want the mass left. However, all that has changed is that

95% of the original radioactive atoms have changed to a different form of about the same amount of mass. The amount of mass remaining would be about the same. Also, one doesn't know the percentage of radioactive atoms

that formed the original mass.