Force = Mass x Acceleration
i. Mass as subject.
ii. Acceleration as subject.

An order of magnitude is a number of the form 10^n such that can be used to compare magnitudes or quantities.

We will find that  the order of magnitude of golf balls that fill a home swimming pool is 10^6

In this case, we want to estimate the number of golf balls that would fill a home swimming pool.

We know that the diameter of a golf ball is D = 42.6mm = 0.0426m

And the volume of a sphere of diameter D is:

V = (4/3)*pi*(D/2)^3

where pi = 3.14

Then the volume of a single golf ball is:

V =  (4/3)*3.14*( 0.0426m/2)^3 = 0.00004 m^3

Now we need to find the average volume of a home swimming pool, we can use 48 m^3 (an average one) to do the general math.

To find the number of golf balls that enter in that volume, we need to do the quotient between the volume of the pool and the volume of a single ball:

N = (48 m^3)/(0.00004 m^3)  = 1,200,000

If we round this to the next order of magnitude: 10^6 (the exponent is the number of digits at the right of the one)

Then the order of magnitude of golf balls that enter in a home swimming pool is  10^6

If you want to learn more, you can read:

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Answer:

To be accurate, it must be able to make measurements that are close to the actual value.

Answer:

½mv²=mgh

g=½(V²/h)

Explanation:

When an object is held at a height, it posses gravitational potential energy which is mgh, where m= mass, h=height, g=acceleration due gravity

When the object is dropped, the potential energy will be converted to kinetic energy which is ½mv², where V=velocity at which the object moves.

V=∆h/t, ∆h is change in height with respect to time.

½mv²=mgh

Mass cancel out,

g=v²/2h

This implies that g does not depend or is not affected by mass. Hence heavy object and light object will reach the ground at the same time when dropped from the same height. When air resistance is negligible.

Answer:



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Home / AC Circuits / Power in AC Circuits



Power in AC Circuits

Electrical power consumed by a resistance in an AC circuit is different to the power consumed by a reactance as reactances do not dissipate energy

  

In a DC circuit, the power consumed is simply the product of the DC voltage times the DC current, given in watts. However, for AC circuits with reactive components we have to calculate the consumed power differently.

Electrical power is the “rate” at which energy is being consumed in a circuit and as such all electrical and electronic components and devices have a limit to the amount of electrical power that they can safely handle. For example, a 1/4 watt resistor or a 20 watt amplifier.

Electrical power can be time-varying either as a DC quantity or as an AC quantity. The amount of power in a circuit at any instant of time is called the instantaneous power and is given by the well-known relationship of power equals volts times amps (P = V*I). So one watt (which is the rate of expending energy at one joule per second) will be equal to the volt-ampere product of one volt times one ampere.

Then the power absorbed or supplied by a circuit element is the product of the voltage, V across the element, and the current, I flowing through it. So if we had a DC circuit with a resistance of “R” ohms, the power dissipated by the resistor in watts is given by any of the following generalised formulas:

please mark this answer as brainlist

Answer:

IV family history of breast cancer or not.

DV chance of developing breast cancer. Hypothesis Someone with a family history of breast cancer will have a higher chance of developing it.

IV: Where the grass is placed: tree shade or direct sunlight.

Dv:The grasses growth rate

Hypothesis: Grass will grow faster in direct sunlight as opposed to tree shade

IV: Fresh veggies and fruit or not

Dv: how much the students eat: will they eat more or less?

Hypothesis The students will eat more in the lunchroom when Fresh veggies and fruits are served.

IV: The dog exercise everyday for 1 hour or not.

DV: The dogs barking: less or more.

Hypothesis: The dog will bark less when someone rings the doorbell if he exercises for 1 hour every day.

Explanation:

Observation When I wish my face before bed, I get less breakouts in the morning.

Question Does nightly face washing prevent morning breakouts?

IV Washing face at night or not

Dv How much breakouts in the morning.

Hypothesis Washing your face nightly decreases the occurrence of morning breakouts.

Answer:

S=2,P=6,D=10,F=14. The total number of electrons contained by s,p,d,f subshells is 32

Mass is not required

[tex]\\ \rm\longmapsto W=Fscos\Theta[/tex]

[tex]\\ \rm\longmapsto W=20(5)cos30[/tex]

[tex]\\ \rm\longmapsto W=100\times \dfrac{\sqrt{3}}{2}[/tex]

[tex]\\ \rm\longmapsto W=50\sqrt{3}J[/tex]

Answer:

[tex]we \: have \\ w = fs \cos( \alpha ) \\ f = 20n \\ m = 2kg \\ s = 5m \\ \alpha = 30 \\ \\ then \: w = 20 \times 5 \times \cos(30) \\ 100 \cos(30) \\ = 100 \frac{ \sqrt{3} }{2} \\ = 50 \sqrt{3} \\ = 86.6 \: joule\\ thank \: yo[/tex]

Answer:

B

Explanation:

In this process on merry go round there is not any external torque so angular momentum will be conserve. Mass is always conserved.

Answer:

Acceleration is 2.78 m/s²

Explanation:

Since the car is from rest, initial velocity, u is zero.

from first newton's equation of motion:

[tex]{ \bf{v = u + at}} \\ [/tex]

v is final velocity

u is initial velocity

a is acceleration

t is time

70 km/h is (70 × 1000 ÷ 3600) m/s = 19.44 m/s

[tex]{ \sf{19.44 = 0 + (a \times 7)}} \\ { \sf{7a = 19.44 }} \\ { \sf{a = 2.78 \: {ms}^{ - 2} }}[/tex]

Answer:

Vision Correction

You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.

Explanation:

hope this helps

Explanation:

extension(x) = 0.02m When the P.E is 10J.

extension(x)= 0.04m PE?.

P.E is proportional to Extension²

P.E/x² = P.E"/x"²

10/(0.02)² = P.E/(0.04)²

P.E= 10x(0.04)²/(0.02)²

P.E= 40J

Answer:

Q:

What characteristic is shared by sunspots, solar flares, and coronal mass ejections? Select the two correct responses.

A:

They tend to occur during active periods of the solar cycle. & They are caused by outward fluctuations of the sun's magnetic field.

Q:Drag each item to the correct location.

A: sunspot: cooler area on suns surface where the magnettic field emerges

solar flare: intense burst of radiation coming from the rapid release of magnetic energy

coronal mass ejection: large bubble of plasma from the rapid release of magnetic energy

Q: Which is the cause of the sun's magnetic properties?

A: uneven churning of plasma

Explanation:

took quick check

good luck yall

The uneven churning of plasma is the cause of the sun's magnetic properties, therefore the correct answer is option B.

A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted.

For a simple bar magnet, N-pole and S-pole are the points on a magnet that have the strongest magnetic field. The magnetic field originates from the north pole and terminates in the south pole of a magnet.

The positively charged ions and negatively charged electrons that make up the plasma of the Sun move around a lot due to its high temperatures. Multiple intricate magnetic fields that twist and turn are produced by the moving plasma. A magnetic field is produced by the extremely hot plasma that escapes from the Sun as the solar wind.

Thus, The sun's magnetic properties are caused by uneven plasma churning, so option B is the correct answer.

Learn more about the magnetic fields from here

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#SPJ2

Answer:

300

Explanation:

when the baby are born then they would have 300 bones but when they grow they would have 206 cause when they grow that 94 bones would convert into different kind of proton and energy I guess

Answer:

all of these very easy questions

Answer:

true

Explanation:

Answer:

The net force is the combined effect (the sum) of the real forces acting on the object. ... When there is a net force on an object, it causes the object to accelerate in the direction of the net force; this is not the same as the direction of the motion unless the object is going in a straight line.

Answer:12.5 km

Explanation:

0.5=1/2

25 x 1/2 = 12.5 (25 ÷ 2 = 12.5)

Answer:

12.5 km

Explanation:

Distance = Speed x Time

               = 25 x 0.5

               = 12.5 km

Answer:

The Moon revolves around the Earth and rotates on its axis with the same period. • The combined effect of these two motions means that one side of the Moon always faces the Earth.

Answer:

F = M a    Newton's second law

F = - K x     force exerted by compressed spring

a = - K x / M

a) is true because the ball originally is accelerated due to gravity and this acceleration will decrease as the spring in compressed

One could argue for (d) if the downward direction was designated as negative

Prior to maximum compression of the spring the velocity would negative and as the spring began to extend (and the ball began move upward) the velocity of the ball would change from negative to positive

[tex]\\ \rm\longmapsto Force=Mass(Acceleration)[/tex]

[tex]\\ \rm\longmapsto Force=25(10)[/tex]

[tex]\\ \rm\longmapsto Force=250N[/tex]

Answer:

40

Explanation:

because his increasing speed

Answer:

what is it for

Explanation:

Answer:

sure

Explanation:

what/where is the work

Answer:

IV what is it's potential energy at the maximum height

Answer:

The direction of defliection of the site to the left I think ..

The area which touches the sand floor of 4 feet of the bull is less than the man.

because the area of surface of contact is more in bull than in man. More is the area of contact, leads is the force or pressure affected.