The speed of light is c=299,792,458m/s a. Write this value in scientific notation. b. What is the value of c to four significant figures?

Answer:

Explanation:

I think its all of the above

have a good day :)

According to the question,

Using Newton`s 2nd law

Force = ∆momentum/time = ∆(mv)/t = (m/t)*∆v

Given m/t = 2.0kg/s

∆v = 12.0m/s (assuming final vel of water = 0)

F = 2.0kg/s x 12.0m/s

F = 24.0N

In physics, a force is a power that can change the motion of an item. A force can purpose an object with mass to alternate its pace. Pressure also can be described intuitively as a push or a pull.

A pressure is a push or a pull and it affects our each day lives because without force, people might not be capable of open and near stuff or lift up our arms or legs.

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66.67 m/s  speed would a 900 kg compact car need to move to have the same kinetic energy.

What is kinetic energy?

The energy an object has as a result of motion is known as kinetic energy in physics. It is described as the effort required to move a mass-determined body from rest to the stated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.

Given

mass of meteor [tex]$m=2.5 \mathrm{gm} \approx 2.5 \times 10^{-3} \mathrm{~kg}$[/tex]

velocity of meteor [tex]$v=40 \mathrm{~km} / \mathrm{s} \approx 40000 \mathrm{~m} / \mathrm{s}$[/tex]

Kinetic Energy of Meteor

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

[tex]$K . E .=\frac{2.5 \times 10^{-3} \times(4000)^2}{2}$[/tex]

K.E.[tex]$=2 \times 10^6 J$[/tex]

Kinetic Energy of Car

[tex]$$\begin{aligned}& =\frac{1}{2} \times M u^2 \\& =\frac{1}{2} \times 900 \times u^2 \\& \frac{1}{2} \times 900 \times u^2=2 \times 10^6 \\& 900 \times u^2=4 \times 10^6 \\& u^2=\frac{4}{9} \times 10^4 \\& u=\frac{2}{3} \times 10^2 \\& u=66.67 \mathrm{~m} / \mathrm{s}\end{aligned}$$[/tex]

Complete question: A typical meteor that hits the earth’s upper atmosphere has a mass of only 2.5 g, about the same as a penny, but it is moving at an impressive 40 km/s. As the meteor slows, the resulting thermal energy makes a glowing streak across the sky, a shooting star. The small mass packs a surprising punch. At what speed would a 900 kg compact car need to move to have the same kinetic energy

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The labeling of blood vessels shown below:

Arterioles are the incredibly small branches of arteries, the blood channels that convey blood out from the heart. Venules, which are incredibly tiny branches that gather blood from numerous organs and body parts, join to create veins, which carry blood back to the heart.

The arteries divide into progressively smaller branches that supply the body's tissues and organs with oxygen and other nutrients. The oxygen and other nutrients enter the cells when the blood passes through the capillaries, while waste products from the cells travel into the capillaries.

Labeling are shown below:

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The complete question is as follows:

Label the blood vessels using the hints provided. Pterygoid plexus of v Middle meningeal Superficial temporal Maxillary v Facial v Posterior auricular V Reset Zoom.

The speed of the bullet is 721m/s as it leaves

The speed of the bullet is 937m/s as it enters block 1 .

From the question, we have

+x direction is to the right (so all velocities are positive valued).

(a) Applying momentum conservation,

(0.0035kg)ν=(1.8035kg)(1.4m/s)  

⇒ν=721m/s .

(b) We use momentum conservation to connect the moment the bullet initially contacts the first block to the moment it has passed through it (using the speed v from section (a)).

(0.0035kg)V  =(1.20kg)(0.630m/s)+(0.00350kg)(721m/s)

V =937m/s .

Linear Momentum:

The product of an object's mass, m, and its velocity, v, is the vector quantity known as linear momentum. It is represented by the letter "p," which is also used to denote momentum. Please be aware that the body's momentum always points in the same direction as its vector of velocity. Because it is a conserved quantity, a system's overall momentum is always constant. kg/s is the unit of linear momentum.

Complete question:

a 3.50g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block  1  (mass 1.20kg ) and embeds itself in block 2 (mass 1.80kg ). The blocks end up with speeds ν 1=0.630m/s  and ν2 =1.40m/s (Fig.9-58b). Neglecting the material removed from block 1 by the bullet, find the speed of the bullet as it (a) leaves and (b) enters block 1 .

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The total number of valence electrons are present in this compound is 36, total bonding electrons are 8, total lone pair electrons are 28

a)The total number of valence electrons are present in this compound

Each chlorine contributes 7 Valence electrons

Krypton atom has 8 valence electrons

total number of valence electrons are 8 + (7 × 4) = 36e

b)Total bonding electrons are 4 single bonds

Therefore, Total bonding electrons are 4 × 2 = 8e

c)Krypton atom has Two lone pairs on it, chlorine has three lone pairs .

Total lone pair compounds are 2 × (4 × 3) = 14 one pairs

Total lone pair of electrons 2 × 14 =28e

An electron in an atom's outer shell is known as a valence electron, and if the outer shell is open, the valence electron can take part in the formation of a chemical bond.

The valence of an element—whether it can bond with other elements and, if so, how readily and with how many other elements—may be determined by the existence of valence electrons. Thus. the electrical. arrangement. of an element has a significant. impact on its. reactivity. A valence electron can only be found in the outermost electron shell of a main-group element; but, in a transition metal, it can also be found in an inner electron shell.

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The hill makes a 23° angle with the horizontal with the given force.

To hold a 23-pound crate on a hill, 6 pounds of force must be used.

Let's say the hill is at an angle to the ground.

There will be two weight components, one running parallel to the hill and the other perpendicular.

The only part that pushes the crate rearward is the one along the hill.

So,

23sin θ= 9

sin θ= 9/23

θ= 23°

The gradient is determined similarly to how slope can be measured as a percentage. Divide the increase by the run after changing the rise and run's units to match.

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The appropriate options to fit in the circle regarding the proof will then be:

substituting steps 9 and 10.

Side-side-side congruence 2, 5, and 6.

CDF = CEF as they length of the same segment

From the data above, it should be noted that the circle centered at point C passes through points D and E and the circles passing through point F, centered at points D and E, have radii of length DF.

Then, it should be noted that the side-side-side congruence is illustrated for 2, 5, and 6. All this illustrates that they will have the same lengths for their sides as they are equal.

Therefore, the correct options has been illustrated.

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Complete question:

Given:

-The circle centered at point C passes through points D and E.

-The circles passing through point F, centered at points D and E, have radii of length DF.

Complete the proof that m∠1 = 90 degrees.

4.28 m/s is the bird's speed immediately after swallowing the insect.

A) The birds speed after swallowing the insect is = 4.84 m/s

Given data :

mass of bird ( M₁ )  = 240 g

speed of bird ( U₁ ) = 6 m/s

mass of insect ( M₂ ) = 12 g

speed of insect ( U₂ )  = 30 m/s

Determine the birds speed of the bird

A) Birds speed after swallowing the insect

we will apply the principle of momentum conservation

M₁U₁  +  M₂U₂ = ( M₁ +M₂ )V

= 240*6 - 12*30 = ( 240 + 12 ) V

= 1440 - 360 = 252 V

therefore ; V =  1080 / 252 = 4.28 m/s is the bird's speed.

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The direction of the force of sliding friction is always that of velocity of the object.

Moving against the surface's normal, the force of sliding friction acts in a direct proportion to the weight.

Let's start by learning about frictional forces from a basic understanding. If a metal block is on a table, it might not move in response to a weak force.

Moving against the surface's normal, the force of sliding friction acts in a direct proportion to the weight. In particular, if the surface on which the body slides is horizontal, the normal force will be equal to the object's weight.

Thus, F = u tanα

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Moment of inertia, a quantitative measure of the rotational inertia of a body in physics. The resistance that a body exhibits to changing its rotational speed about its axis by the application of a torque (torque). Axes can be internal or external and can be fixed or unfixed. However, the moment of inertia (I) is always given about this axis and is defined as the sum of the products of the mass of each particle in a particular body multiplied by the square of its distance from the axis. In calculating the angular momentum of a rigid body, the moment of inertia is analogous to the mass of linear momentum. For linear momentum, the momentum p is equal to the mass m multiplied by the velocity v. For angular momentum, on the other hand, the angular momentum L is equal to the moment of inertia I multiplied by the angular velocity ω.

R₁ = 40 × 10

R₂ = 90 × 10

R₃ = 40 × 10

⇒Iₓₓ = I₂ + 2(I₁ + A₁y²)

Where, y = distance between centroid of rectangle 1 and whole figure

I₁ = I₃ = Moment of inertia of rectangle = 1

I₂ = Moment of inertia of rectangle 2

Also,

I₂ = 90(10)³/12

I₂ = 7500 mm⁴

I₁ = 10(40)³/12

I₁ = 53333.33 m⁴

⇒Iₓₓ = 7500 + 2(53333.33 + 400(25)²)

⇒Iₓₓ = 7500 + 510666.66

= 614166.67 mm⁴

We know,

I = A k²

Where, k = radius of gyration

A = 400 + 900 + 400

A = 1700 mm²

⇒ 614166.67 = 1700 k²

k = 19 mm

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The complete question is as follows:

Three subgroups of connective tissue can also be distinguished: loose connective tissue, dense connective tissue, and specialized connective tissue. Extracellular matrix, collagenous, elastic, and reticular fibers make up loose connective tissue, which serves to hold organs in place.

Appropriate connective tissue is further classified into loose and dense connective tissues. Adipose, reticular, blood, bone, and cartilage are all types of specialized connective tissue. Any illness that affects the bodily tissues that link the body's structures together is referred to as a connective tissue disease. Collagen and elastin, two proteins, are the building blocks of connective tissues. The protein present in collagen

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The total displacement of the airplane is found to be 400 km West

First of all the airplane Travels 1000 km in the direction of west and then the airplane Travels 600 km in the direction of East.

Now if we assume the is direction to be the x-axis and the west direction to be the negative access because they both are completely opposite of each other, then we can define the total displacement has the difference between the initial position U and the final position V of the airplane which will be given by,

D = (V-U)

Now, putting all the values,

D = -1000-(-600)

D = -400km.

So we can say that the total displacement of the airplane is -400 km in the direction of West.

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4.92s is the time, it takes for the car to stop.

60.47m is stopping distance, also called as deceleration.

Deceleration is acceleration that takes place opposite to the direction of velocity. Here velocity always decreases.

Kinematic is study of motion without considering physical properties and forces acting on them. Kinematic equation deals with variables that are associated with kinematic namely, displacement, time, velocity and acceleration.

Thus to calculate time and deceleration, kinematic equation is used.

a) From question vi=55mph = 24.6m/s and f=5.0m/s²

Therefore, vi-vf/f =t

t=24.6-0/5

t=4.92s

Thus, tie required to stop the car is 4.92s

b) Δx = vf²-vi²/2a

where vf= 0m/s (final speed)

vi= 55mi/h ≈ 24.59m/s (initial speed)

a=-5m/s² (deceleration)

Δx=0²-25.59²/-2.5≈60.47m

Thus, 60.47m is the stopping distance

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The effect that this will have on the amplitude of your oscillation.is b.) The amplitude of oscillation will decrease.

The amplitude of an oscillating system is the magnitude of change in the oscillating variable with each oscillation. Sound waves in air, for example, are oscillations in atmospheric pressure, and their amplitudes are proportional to the pressure change during one oscillation.

When a wave travels through a medium, it loses energy as it moves. As the distance between the wave and its source grows, it spreads out over a larger and larger area. As the wave spreads through the medium, it loses energy and its amplitude decreases.

In this case, at the point of equilibrium, the cart and the skater will have maximum kinetic energy. By dropping the same bag, the energy is reduced. The amplitude of an oscillating pendulum decreases with time because of friction due to air

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On a whim, you are trying to stand in a cart attached to a strong spring. The spring is compressed and then released, and you oscillate back and forth, trying to maintain your balance. There is a sand bag in the cart.

At the instant you pass through the equilibrium (x=0) location of the spring, you drop the sandbag onto the ground, out of the cart.

Question: If you drop the sand bag out of the cart right at the equibrium location, what effect will that have on the amplitude of your oscillation? (choose correct choice):

a.) The amplitude of oscillation will increase.

b.) The amplitude of oscillation will decrease.

c.) There will be no effect on the amplitude.

The weightlifter can exert a power of 1000 watts, for the given work done and time.

The quantity of energy moved or converted per unit of time is known as power. The watt, or one joule per second, is the unit of power in the International System of Units.  Power is a scalar quantity.

Only when a particular distance is traversed or when force is applied is work performed. No work is done if the force given to the object does not cause it to move.

Calculations:

Power (P) = work done/time taken

Work done = 2000N * 2m = 4000Nm

Time taken = 4 seconds

P= 4000Nm/4sec = 1000watts

So, the person can exert a power of 1000 watts.

Hence, the weightlifter can exert a power of 1000 watts, for the given work done and time.

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The spring constant is 133 N/m and time period is 0.62 seconds.

(a) The spring stretches until the magnitude of its upward force on the

    block equals the magnitude of the downward force of gravity:  ky=mg,

    where  y= 0.096m  is the elongation of the spring at equilibrium,  

                 k = the spring constant, and  m=1.3kg  is the mass of the block.

Thus,

k=mg/y= (1.3)(9.8m/s ^2)/(0.096m)=133 N/m.

(b) The period is given by, T = 1/f = [tex]\frac{2\pi }{\alpha }[/tex] = [tex]2\pi \sqrt{\frac{m}{k} }[/tex]

     where, m = mass and k = spring constant

     Given , m = 1.3 kg and  k = 133N/m

     putting these values in above equation we get,

     T = 0.62 seconds

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Tissue that lines the ventricles (brain's hollow regions) produces cerebrospinal fluid (CSF; indicated in blue). It circulates around the spinal cord and brain to supply nutrients and serve as a protective cushion against damage.

While protecting the brain inside the skull and acting as a shock absorber for the CNS are CSF's principal functions, it also distributes nutrients and substances that have been filtered from the blood and clears waste from the brain. The cerebrospinal fluid supports the brain and acts as a lubricant between the surrounding bones, the brain, and the spinal cord. It is predominantly formed in the ventricles of the brain. The fluid functions as a cushion, reducing the force by spreading the impact when a person has a head injury.

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Answer:

‎29.0 ‎it's ‎magnetic

Explanation:

Tony's Arc Reactor serves as the power source for the Repulsors, which are located in the palms of the armor.Originally intended to stabilize the flight of the armor and add more agility.

Hydrogen is the gas utilized, and a sophisticated suit like Iron Man can easily extract it from the air by electrolysis. The water was condensed even as suit overpressurized ram air into form water, as well as the hydrogen gas is formed and sent right to the rocket boots.

The nuclear core which Tony Stark creates and implants in his heart to save his life also fuels all of his armor.In essence, it is a very energy-dense battery.

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If instead of a single wire we use a coil of thick copper wire containing 24 turns, then the voltmeter reads 120 V.

A voltmeter is also known as a voltage meter. It is an instrument used for measuring the potential difference or voltage between two points in an electrical circuit.

Emf of a solenoid is given by formula:

E= - N (dФ/dt)

Where,

N is Number of turns;

Ф is  Magnetic flux and t is time taken

The negative sign indicates the direction of flow or polarity.

It can be seen clearly that the induced emf is directly proportional to the number of turns.

So, if the initial voltage is given 5 volts at a set number of 24 turns, the voltmeter reads:

= E *N

= 5 * 24

Voltmeter reads = 120 volts.

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The  work done on the particle as it moves from x=0 to x=d is qd^3/3 when  a particle moving on the x-axis experiences a force given by Fx=qx2, where q is a constant.

Given force is Fx =qx^2

As particle moves from x = 0 to x = d the work done on the particle by using force Fx is as follows

By integration W = ∫Fxdx

W = ∫qx^2dx

W  =  (qx^3/3) from 0 to d

W = q/3(d^3 - 0)

W = qd^3/3

hence the work done by particle as it moves from x= 0 to x = 3 is qd^3/3

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Option B;  A wave pulse on a string to travel twice as fast, the string tension must be 2-Increased by a factor of 4.

wave velocity is given by

v =2v.

T = 4T

As the pulling force transmitted axially by a string, rope, chain, or other similar object, or by each end of a rod, truss member, or other similar three-dimensional object, tension is defined; it can also be defined as the action-reaction pair of forces acting at each end of the aforementioned elements. Compression's opposite, tension, might exist.

When molecules or atoms are forced apart at the atomic level and accumulate potential energy while a restoring force is still present, the restoring force may produce what is also known as tension. Under such stress, each end of a string or rod might pull on the thing to which it is linked, releasing the tension and allowing the string or rod to return to its relaxed length.

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The best way to find the distance to galaxy is using a highly resolved telescope like Hubble space telescope.

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The following kelvin temperatures to the Celsius and Fahrenheit scales:

[°F] = [K] × 9/5 - 459.67

[°C] = [K] -273

A) 400k

F = 260.33

C = 127

B) 95 k

F= -288.67

C = -178

C) 1.55*10^7K

F = 2.79 *10^7

C = 1.55*10^7

The Fahrenheit scale was first proposed by German physicist Daniel Gabriel Fahrenheit in 1724. Using a tube filled with mercury or alcohol, Fahrenheit used his three points to determine the scale. He set the point where water, ice, and ammonium chloride (a salt) are stable at his 0°F.

The Celsius scale or Celsius scale is a temperature scale based on the freezing point of water at 0°C and the boiling point of water at 100°C. The Fahrenheit scale is a temperature scale based on the freezing point of water at 32°F and the boiling point of water at 212°F. Fahrenheit is used primarily in the United States, while Celsius is used worldwide.

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30.05 sec much time it takes for the amplitude to decay to 43.2 percent of its original initial value

The greatest displacement or distance that a point on a wave or vibrating body may travel in relation to its equilibrium position It is equivalent to the vibration path's half-length.

Given data

Time period (T) = 2.84 sec

Reduction  = 93.6  %

We know that logarithmic decrement is given by:

a₁ = a₀ [tex]e^-{bt}[/tex]

where b = constant

As a₁ = 0.936 a₀

or, 0.936 a₀ = a₀ [tex]e^-{b*2.84}[/tex]

or, b = 0.002

Now a₁  = 0.432 a₀

or, 0.432 a₀ = a₀ [tex]e^-{0.002*t}[/tex]

or, t = 30.05 sec

So, it will take 30.05 sec to decay 43.2 %.

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Answer: Inertia is an object’s resistance to a change in its motion. The greater the mass of an object, the greater the force needed to move it or stop it from moving.

Explanation: Hope this was helpful

A decline in function as a result of stimulation is known as negative feedback. When there is negative feedback, the output of a certain system or reaction is reduced.

The homeostatic process is known as a negative feedback mechanism when the response causes the initial stimulus to decrease. Positive feedback mechanisms are those where the response improves upon the initial stimulus. Feedback loops react to environmental changes or stimuli to keep systems operating close to their set point or ideal level. When an input or stimulus is affected or influenced by an output or response from a loop, this is known as feedback.

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A.) Bumper Cars B.) waves in a ripple tank C.)electromagnetic radiation D.)an orchestra . Therefore all of the above.

According to the principle of superposition for mechanical waves, the position of the medium's mass element at a place where two or more moving waves join is equal to the algebraic total of the positions originating from the individual waves.

When two (or more) waves are traveling through the same medium simultaneously, the principle of superposition can be applied to them. Without causing any disturbance, the waves pass through one another.

They overlap and produce a phenomenon called wave interference.

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The given question is incomplete, the complete question is:

The superposition of mechanical waves can be observed in the movement of :

A. Bumper Cars

B.  waves in a ripple tank.

C. electromagnetic radiation

D. an orchestra

The true statement for the three given scenarios is: premarital education programs are linked to a higher level of commitment to a spouse; Anorexia nervosa and bulimia nervosa affect women more than men; pubertal growth spurt occurs approximately two years earlier for girls than for boys.

Premarital education programs concentrated on preventing marital distress by promoting discussion of hidden assumptions about marriage and teaching couples the art of communication and relationship skills before problems develop. Hence, they are linked to a higher level of commitment to a spouse. Anorexia nervosa and bulimia nervosa are eating disorders which are more common among female than men according to research. Pubertal growth spurt refers to the fast and intense increase in the rate of growth in height and weight that occurs during the adolescent stage of the human life cycle. A major growth spurt happens at the time of puberty, usually between 8 to 13 years of age in girls and 10 to 15 years in boys. Hence, it occurs approximately two years earlier for girls than for boys.

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