This diagram shows a wire with a current flowing through it. What do the circles and arrows around the wire represent?
A) They represent an electromagnetic field.

B) They represent an electric field.

C) They represent attraction between charged particles.

D) They represent a magnetic field.

Answer:

The strength of the electromagnet increases.

Explanation:

Answer:

235 m/s

Explanation:

v = u + at

where v = final speed,

u = initial speed (10 m/s),

a = acceleration (15 m/s²),

t = time taken (15 s).

Substituting into the formula:

v = 10 + (15 x 15)

v = 10 + 225

v = 235 m/s

Both the butterfly and the large car will have equal forces but in opposite direction.

Newton's third law of motion states that action and reaction are equal and opposite. That is, the force exerted on an object is equal to the reaction experienced by the object.

Fa = - Fb

where;

Thus, both the butterfly and the large car will have equal forces but in opposite direction.

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Answer:

[tex]\boxed {Density = 4800 kg/m^{3}}[/tex]

Explanation:

Formula :

[tex]\boxed {Density = \frac{Mass (kg)}{Volume (m^{3})}}[/tex]

Convert volume into standard unit :

⇒ 250000 cm³ × 10⁻⁶

⇒ 0.25 × 10⁶ × 10⁻⁶

⇒ 0.25 m³

Solve for density :

⇒ Density = 1200 kg / 0.25 m³

⇒ Density = 1200 × 4 kg/m³

⇒ Density = 4800 kg/m³

The statement that differentiates an audiologist from an anthropologist is that an audiologist examines physical characteristics of humans. That is option C.

Audiologist is an individual that specializes in the diagnosis, treatment and management of hearing loss and balance disorders in adults and children.

An anthropologist is also an individual that studied the past and present experiences of individuals.

Therefore, the statement that differentiates an audiologist from an anthropologist is that an audiologist examines physical characteristics of humans.

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Answer:

C

Explanation:

First the water heats up to the boiling point ( temp increases)

  then, as it boils it remains at constant temp ( boiling point)

The temperature of water changes when it is heated as it increases first and then remains constant. So, option C is correct.

When a liquid is heated to its boiling point, the temperature at which the vapor pressure of the liquid equals the pressure that the surrounding environment exerts on the liquid, boiling is the fast vaporization of the liquid that takes place.

Boiling can be divided into two primary categories: nucleate boiling, in which tiny bubbles of vapor develop at specific locations, and critical heat flux boiling, in which the boiling surface is heated above a critical temperature and a film of vapor forms on the surface. Transition boiling is an unstable, transitional kind of boiling that contains both sorts of components. Due to the decreased air pressure found at higher elevations, water's boiling point, which is 100 °C or 212 °F, is lower.

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The cut off frequency of the magnesium atom is obtained as 8.9 * x 10^18 Hz.

The cut off frequency is the lowest frequency of the incident ray at which photoelectric effect occurs.

Given that;

1 eV  gives 1.60 x 10-19 J

3.70 eV  gives 3.70 eV * 1.60 x 10-19 J/1 eV

= 5.92x 10^-19 J

Now;

Wo = hfo

fo = Wo/h

fo = 5.92x 10^-19 J/6.6 * 10^-34

fo = 8.9 * x 10^18 Hz

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Answer:

[tex]\fbox {40 V}[/tex]

Explanation:

The formula we apply :

[tex]\boxed {Voltage = Current \times Resistance}[/tex]

At the point 2, current flowing will be 2A and resistance is 20Ω.

Solving :

V = 2 × 20

V = 40 V

Answer:

The magnitude of acceleration should be increasing.

Velocity is positive as the mass is moving towards the maximum positive displacement. Velocity would be decreasing. Acceleration is negative as velocity is decreasing. Additionally, the magnitude of acceleration would be increasing (becomes more negative.)

Explanation:

As the mass in this question moves upwards, the displacement of this mass is becoming more positive. Hence, the velocity of this mass would be positive.

In a simple harmonic motion, velocity is:

The mass in this question is moving from [tex]0[/tex] displacement (where velocity is maximized) towards maximum displacement (where velocity is [tex]0[/tex].) Thus, the velocity of the mass would be decreasing.

Since the velocity of this mass is decreasing, the acceleration of this mass would be negative. In a simple harmonic motion, acceleration is:

The mass in this question is moving from the equilibrium position (where acceleration is [tex]0[/tex]) towards maximum displacement (where acceleration is most negative.) Thus, the magnitude of the acceleration of this mass would be increasing, and the acceleration of the mass would become more negative.

Answer:

the acceleration should be increasing, not decreasing.

or in other words, D.

Answer:2140 watts x 6 hours =12.84 kWh. Are you looking for specific type units such as Jules?

Answer:

Roots are basically hooked into the ground?

Explanation:

Maybe you could comment here the choices if it's multiple choice.

The time period resulting in oscillations will be 1.986 seconds.

The period is the amount of time it takes for a particle to perform one full oscillation. T is the symbol for it. Taking the reciprocal of the frequency yields the frequency of the oscillation.

The time period of the oscillation is;

[tex]\rm T = 2 \pi\sqrt{\frac{L}{g}} \\\\ \rm T = 2 \times 3.14 \times \sqrt{ \frac{98.2 \ \times 10^{-2} \ m}{9.81 \ m/s^2}} \\\\ T= 1.986 \ sec[/tex]

Hence the time period resulting oscillations will be 1.986 seconds.

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Answer:

See below

Explanation:

Measure the distance and the amount of time to cover that distance

 then speed   =    distance / time

Answer:

s=d/t

Explanation:

s=speed

d=distance

t=time

Just basic formula stuff

Answer:

67.5m

Explanation:

Use the kinematics equation.[tex]\frac{vf^2-vo^2}{2a} =x[/tex]

[tex]vf=30[/tex]  [tex]vo=15[/tex] [tex]a=5[/tex]

[tex]\frac{30^2-15^2}{10} =x\\[/tex]

[tex]67.5=x[/tex]

The increase in potential energy of his mother if her mass is 56.0 kg will be 6031.97 J.

The energy that an item has due to its location in a gravitational field is known as gravitational potential energy.

The potential energy increases by 3773 J

PE₂-PE₁=mg(h₂-h₁)

3773 J = 35.0 × 9.81 × (h₂-h₁)

(h₂-h₁) = 10.98

Case 2 ;

ΔPE =?

ΔPE=mg(h₂-h₁)

ΔPE=56.0 × 9.81 ×10.98

ΔPE=6031.97 J.

Hence, the increase in potential energy of his mother if her mass is 56.0 kg will be 6031.97 J.

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Answer:

50 charges

Explanation:

it will deduct and mutiple it self and divide

The cliff diver jumps off with a velocity of 7.85m/s at an angle of 86° with respect to the ground.

The height of the cliff = 57m

The horizontal distance from the cliff = 2.15m

The time is taken = 4.3s

The acceleration due to gravity g = 9.81m/s²

Consider the vertical y-axis

                    d = ut +1/2gt²

                   57 = u (4.3) + 1/2 (9.81) (4.3)²

                   57 = 4.3u + 90.69

                    u = -7.836m/s

The y component of initial velocity is in the upwards direction

Consider the horizontal x-axis

                    d = ut

                    2.15 = u (4.3)

                    u = 0.5 m/s

The net velocity is the square root of the summation of the squares of the x and y components of velocity

Net velocity = 7.85m/s

For the direction, tan θ = y/x = 15.67

θ= 86°

So the cliff diver jumps off with a velocity of 7.85m/s at an angle of 86° with respect to the ground.

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Answer:

a single closed path of electrical components including a voltage source

The magnetic north pole of the earth's magnet is in the geographic south pole.

The magnetic north pole of the earth's magnet is the geographic south pole.

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The particles released during alpha decay are called alpha particles. Alpha particles have greater mass and charge than other emitted particles.

Since alpha particles have more mass and charge, they are more ionising and lose more energy at a faster rate and can be blocked easily.

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Answer:

below

Explanation:

1. in front of the mirror

2. convex mirror

3.upright and diminished

4.magnification= image height÷object height

-1.25=i.h÷2

ih=-1.25×2

i.h=-2.5

Answer:

I think its either A or B. I’m not really sure, don’t listen to me. Read my explanation and it should help you.

Explanation:

When the two conducting spheres are brought together to touch, it is as though they become one single big conductor and the total charge of the two spheres spreads out across the whole surface of the touching spheres. When the spheres are moved apart again, each one is left with half of the total original charge…

X and Y are two identical conducting spheres separated by a distance d. X has a charge of +6µC and Y has a charge of -2µC. The electric force between them is +F (i.e. attractive). The spheres are touched together and are then returned to their original separation d. What is the new value of the force between them? Any help is greatly appreciated. I assumed that since the net charge should remain the same after, there would be no change in the value of the force, but the answer scheme gives the answer as -F/3…

Answer:

The value of mass 1, m1= 6/5m

The value of mass 2, m2= 3/5m

Explanation:

case 1:

here tension and the acceleration will be:

for m1;

for m2:

adding the both equations,

2mg - 2T + 2T-mg = 2ma + ma/2

a = 2/5 g

putting the value of a into the equation 1.

mg - T = m* (2/5)g

T = 3/5 ( mg )

now

case 2:

The two identical blocks are released from the rest, the tension remains the same as the case 1.

so,

for m1:

for m2:

adding both equations we get,

2T-m2g + 2m2g - 2T = 0

m2 = m1 / 2

T = m1*g / 2

here we know that

T (case1) = T (case2)

3/5 ( mg ) = m1*g / 2

m1 = 6/5 m

hence

m2 = 3/5 m

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No, Samuel hasn't done work, Since the door doesn't move.

Work is said to be done when an applied force moves an object over a given distance.

W = Fd

where;

Since the door doesn't move, we can conclude that Samuel hasn't done work.

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Answer:

42.417 cm³

Explanation:

The formula to find the volume of a cone is :

V = [tex]\frac{1}{3}[/tex] × π r² h

Here,

r ⇒ radius ⇒ 3 cm

h ⇒ height ⇒ 4.5 cm

Let us find it now.

V = [tex]\frac{1}{3}[/tex] × π r² h

V = [tex]\frac{1}{3}[/tex] × π × 3 × 3 × 4.5

V = [tex]\frac{1}{3}[/tex] × π × 9 × 4.5

V = [tex]\frac{1}{3}[/tex] × π × 9 × 4.5

V = [tex]\frac{1}{3}[/tex] × π × 40.5

V = [tex]\frac{1}{3}[/tex] × 3.142 × 40.5

V = [tex]\frac{1}{3}[/tex] × 127.251

V = 42.417 cm³

b. The wavelength of light emitted by the object is 233 nm

c. The type of radiation originally emitted by the object is ultraviolet radiation.

To find the wavelength, we need to know what redshift is.

Redshift is the increase in wavelength and the corresponding decrease of frequency and photon energy of electromagnetic radiation.

Redshift is given by z = λ'/λ - 1 where

Making λ subject of the formula, we have

λ = λ'/(1 + z)

Given that has a redshift of 7.6 and the JWST observes the object at a wavelength of 2 micrometres (mid-infrared light).

So,

Substituting the values of the variables into the equation, we have

λ = λ'/(1 + z)

λ = 2μm/(1 + 7.6)

λ = 2μm/8.6

λ = 0.233 μm

λ = 233 nm

So, the wavelength of light emitted by the object is 233 nm

Since the wavelength is 233 nm and the wavelength is in the range of ultraviolet radiation 200 nm - 315 nm.

So, the type of radiation originally emitted by the object is ultraviolet radiation.

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The vertical velocity of the projectile upon returning to its original is 17. 74 m/s

Using the formula:

Vertical velocity component , Vy = V * sin(α)

Where

V = initial velocity = 36. 6 m/s

α = angle of projectile = 29°

Substitute into the formula

Vy = 36. 6 * sin ( 29°)

Vy = 36. 6 * 0. 4848

Vy = 17. 74 m/s

Thus, the vertical velocity of the projectile upon returning to its original is 17. 74 m/s

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Stars with fairly circular orbits about the galactic center is found in the disk

Stars are one of the astronomical object that is usually very bright.

A circular orbit star is a star that moves in circular direction and not elliptical orbit which is most common to starts.

Therefore, Stars with fairly circular orbits about the galactic center is found in the disk

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