2. Determine the number of significant figures in each of the following:

a) 3427 b) 0.00456 c) 123,453

d) 172 e) 0.000984 f) 0.502

g) 3100.0 x 102 h) 0.0114 x 104 i) 107.2

j) 0.0000455 k) 2205.2 l) 30.0 x 10-2

m) 0.982 x 10-3 n) 0.0473 o) 650.502

p) 3.03 x 10-1 q) 20.4 x 105 r) 1.29

s) 0.00565 t) 1362205.2 u) 450.0 x 103

v) 1000 x 10-3 w) 546,000 x) 546,000

Answer:

Which uses direct current - A flash light.

Explanation:

Hope you have a great day.

Answer:

Explanation:

Force= (q1q2)/(4/\Ęr2)

3×10^6= (1.602×10^-19)^2/(r^2)

r^2=(2.27×10^-33)/(3×10^6)

r^2=8.55×10^-45

r= 9.25×10^-23

a Chevy camera engine exerts 650 hp to move the car. then  4.8 × 10⁵ Watt.of power does the engine exert .

Power is the rate of doing work. Power is also defined as work divided by time. i.e. Power = Work ÷ Time. Its SI unit is Watt denoted by letter W. Watt(W) means J/s or J.s-1. Something makes work in less time, it means it has more power. Work is Force times Displacement. Dimension of Power is [M¹ L² T⁻³].

Just multiply the horsepower with 745.7 that will convert into watt.

Watt =  650 hp × 745.7  = 4.8 × 10⁵ watt.

a Chevy camera engine exerts 650 hp to move the car. then  4.8 × 10⁵ Watt.of power does the engine exert.

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Answer:

6.25 sec

Explanation:

Given: initial velocity = 15 m/s final velocity = 25 m/s, and distance = 125 m

average velocity = (25 + 15)/2

Distance(D) = Rate(R) x Time(T)

125 = ((25 + 15)/2) x T

125 = 20T

T = 6.25 sec

Hence the required time to achieve final speed is 6.25 sec

Answer:

See below

Explanation:

Here is another way

d = vo t + 1/2 a t^2        a = change vel /change t =  10/t

125 = 15 t + 1/2 (10/t) t^2

125 = 20 t

t = 125/20 = 6.25 s

Answer:

\( Energy, \; E = 2.6504 * 10^{-34} \; Joules \)

Explanation:

Given the following data;

Frequency = 4.0 x 10⁹ Hz

Planck's constant, h = 6.626 x 10-34 J·s.

To find the energy of the electromagnetic wave;

Mathematically, the energy of an electromagnetic wave is given by the formula;

E = hf

Where;

E is the energy possessed by a wave.

h represents Planck's constant.

f is the frequency of a wave.

Substituting the values into the formula, we have;

\( Energy, \; E = 4.0 x 10^{9} * 6.626 x 10^{-34} \)

\( Energy, \; E = 2.6504 * 10^{-34} \; Joules \)

Answer:

The current through all of the resistors will add up to 10 A.

Explanation:

Explanation:

10 hours.Children aged 6 to 12 years old should typically sleep 9 to 12 hours each day, while teenagers aged 13 to 18 years old should sleep 8 to 10 hours daily, according to the American Academy on Sleep Medicine.

Teenagers often require 8 to 10 hours of rest each night.Some people just need 7 hours, while others need up to 11 hours.Early adolescence is a time when it's fairly normal for kids to start to demand to get out of bed later and wake up later.

Even though some people may frequently function on little sleep, the majority of evidence indicates that adults need more than six hours of sleep every night.Most individuals should get at least 7 hours of sleep each night, according to experts.

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Answer:

m per second is the answaegnzxn

Answer:

Explanation:

Pecan 1 and 4 seem the best answer

The multimeter is probably broken and you should give it to your instructor/TA is used to measure the electric potential difference, but the value stays at 0.00 v no matter what you do and there is an h on the screen.

What is a multimeter?

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3. You attempt to use your multimeter to measure the electric potential difference, but the value stays at 0.00 V no matter what you do and there is an H on the screen. What's going on?

Answer: Because of the friction force acting directly on the bag.

Explanation:

The function of the wheels is diminish the effect of the friction force, when the friction pulls back, it makes the wheel rotate, and this force is not applied directly on the bag.

Now the wheels are not working, so now the friction is acting directly on the bag, this is why the mand finds more difficult to drag the bag.

Higher Power Efficiency  and Eliminates Risk of Compressor Breakdown

Answer:

C. It provides evidence of light acting as a wave.

Explanation:

Took test

Destructive interference occurs when the amplitude of the displacements when the crest of one wave meets the trough of another wave is equal to the difference in the separate magnitudes, hence option C is correct.

Any position along the medium where the two conflicting waves have a displacement in the opposite direction will experience destructive interference.

When the phase difference between the waves is an even multiple of (180°), constructive interference happens. Example: When two speakers are placed side by side and their distance from the viewer is the same, we can experience constructive interference.

Therefore, destructive interference of light provides evidence of light acting as a wave, hence option C is correct.

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T = 0.0247 s (periodic time, measured in seconds)

A = 2.08 mm (amplitude, measured in millimeters)

To find the periodic time and amplitude of the harmonic motion, we can use the relationship between velocity, acceleration, and displacement in simple harmonic motion.

The maximum velocity (Vmax) of the body is related to the angular frequency (ω) and amplitude (A) of the motion as follows:

Vmax = ωA

The maximum acceleration (Amax) is related to the angular frequency (ω) and amplitude (A) as:

Amax = ω²A

Given that Vmax = 8.4 cm/s and Amax = 3.4 m/s², we can solve these equations to find ω and A:

From Vmax = ωA:

8.4 cm/s = ωA

From Amax = ω²A:

3.4 m/s² = ω²A

Converting cm/s to m/s:

8.4 cm/s = 0.084 m/s

Substituting these values into the equations, we get:

0.084 m/s = ωA

3.4 m/s² = ω²A

Dividing the second equation by the first equation:

3.4 m/s² / 0.084 m/s = ω²A / ωA

40.48 = ω

Now, we can find the amplitude (A) by substituting ω back into the first equation:

0.084 m/s = (40.48)(A)

A ≈ 0.00208 m or 2.08 mm

Therefore, the periodic time (T) is the inverse of the angular frequency (ω):

T = 1 / ω = 1 / 40.48 s ≈ 0.0247 s

The periodic time (T) is approximately 0.0247 seconds, and the amplitude (A) is approximately 2.08 mm.

The complete question should be:

The maximum velocity of the body performing harmonic motion is 8.4 cm/s and the maximum acceleration of the same body is 3.4 m/s^2. What is the periodic time and amplitude of the motion?

T=________ (unit of measure__________)

A=________ (unit of measure__________)

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Answer:

binoculars,spyglass,telescope etc

The Lightning Component bundle framework is a UI framework for developing single page applications for mobile devices and desktop devices like for windows and laptops.

A Lightning Component bundle developed with the Aura programming model can have three JavaScript files. A created lightning component is a bundle of code. The bundle contain all that resources related which are required  to a component like java script controller, java script helper, renderer, CSS styles, etc. A basic lightning component bundle contains the design of a page with some kinds of lightning tags.

So we can conclude that: The Lightning Component bundle framework is a UI framework for developing single page applications for mobile devices and desktop devices like for windows and laptops.

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The average power developed by the engine is 24.0 hp and instantaneous power output of the engine at t = 11.9 s, just before the car stops accelerating is 459 hp.

Given data:

Mass of car m = 1.50 × 103 kg

Initial velocity u = 0

Final velocity v = 17.3 m/s

Time taken t = 11.9 s

Air resistance R = 400 N

A. Average power developed by the engine can be calculated by using the formula:

Average power = Total work done / Time taken

Total work done can be calculated as follows:

W = F × d

Where, F = Net force acting on the car

               = m × a [Using Newton's second law of motion]

               = 1.50 × 103 kg × a

The acceleration of the car can be calculated as follows:

a = (v - u) / ta

   = (17.3 m/s - 0) / 11.9 s

   = 1.45 m/s2

Therefore,

F = m × a

   = 1.50 × 103 kg × 1.45 m/s2

   = 2.18 × 103 N

The displacement d of the car can be calculated as follows:

d = ut + (1/2)at2

   = 0 × 11.9 + (1/2) × 1.45 × (11.9)2

   = 97.7 m

Now,

Total work done,

W = F × d

    = 2.18 × 103 N × 97.7 m

    = 2.13 × 105 J

Therefore,

Average power developed by the engine = Total work done / Time taken

                                                                      = 2.13 × 105 J / 11.9 s

                                                                      = 1.79 × 104 W

We can convert this value to horsepower as follows:

1 hp = 746 W

Therefore,

Average power developed by the engine = (1.79 × 104) / 746 hp

                                                                      = 24.0 hp (approximately)

Therefore, the average power developed by the engine is 24.0 hp.

B. Instantaneous power output of the engine at t = 11.9 s, just before the car stops accelerating can be calculated as follows:

Instantaneous power output = Force × velocity

                                                = m × a × v

Where, v = final velocity of the car= 17.3 m/s

            a = acceleration of the car= 1.45 m/s2

Therefore,

Instantaneous power output = m × a × v

                                                = 1.50 × 103 kg × 1.45 m/s2 × 17.3 m/s

                                                = 3.43 × 105 W

We can convert this value to horsepower as follows:

1 hp = 746 W

Therefore,

Instantaneous power output = (3.43 × 105) / 746 hp

                                                = 459 hp (approximately)

Therefore, the instantaneous power output of the engine at t = 11.9 s, just before the car stops accelerating is 459 hp.

The average power developed by the engine is 24.0 hp and instantaneous power output of the engine at t = 11.9 s, just before the car stops accelerating is 459 hp.

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The marked part x is inside the circle hence, the direction will be same in all points. Therefore, the correct label is x includes a magnitude.

There are two types of physical quantities namely, scalar and vector quantities. Scalar quantities or variables are those which are having magnitude only and not depends upon the direction.

Temperature, volume, refractive index, energy  etc. are scalar quantities. Vector quantities are those having both magnitude and direction. Force, acceleration, velocity, work done etc. are vector quantities which depends on the direction.

The marked area x is a point inside a circle. Therefore its path of motion or change is circular and thus does not affects its magnitude. Thus it have no directional change and has a magnitude.

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According to Jean Piaget, unrealistic idealism often occurs in adolescence as a result of egocentrism. The inability to distinguish between self and others is referred to as egocentrism.

The inability to distinguish between self and others is referred to as egocentrism. It is, more precisely, the incapacity to effectively assume or comprehend any viewpoint other than one's own.

Egocentrism may be present in every stage of life, including childhood, adolescence, and maturity.

Hence option B is correct. According to Jean Piaget, unrealistic idealism often occurs in adolescence as a result of egocentrism.

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Answer:

got it right⬇️✅

Answer:

Protons and Neutrons are found in the nucleus   D would be your answer

Explanation:

Answer:

protons

Explanation:

Answer:

s is distance so it's dimensions become L.

Nd other side we have ut+1\2at^2.

as 1\2 is a constant it will have dimensions and apply the dimensions to other quantities.

on solving u will get L there also i,e ur LHS = RHS.

thus the equation is dimensionally consistent.

Explanation:

Answer:

I think it is 1,200.

Explanation:

In the research I found, It says in a paragraph it is 1,200. I don't know if this is wrong or correct. I hope this helps!!!

Answer:

pressure is equals to F/A tge answer is 5pa

A coin falls off a table and is traveling to the ground. There is a net force on the coin which is responsible for the motion of the coin. Thus, the correct option is A.

The net force can be defined as is the sum of all the forces which are acting on an object. Net force acting upon an object can accelerate its mass. Some other forces also acts on a body either at rest or motion. The net force is used in a system when there is a significant number of forces acting on the object.

A coin which falls off a table and is still traveling to the ground. Then, it can be concluded that there is a net force which is acting on that coin which is responsible for the motion of the coin.

Therefore, the correct option is A.

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Answer:

C: Ribbon

Explanation:

These are options for the question

A: Button

B: Clipboard

C: Ribbon

D: Task list

Ribbon as existed as far as late 1980s and can be described as a control element that control several tabs that user is working with, and give room for user to locate the appropriate Command for his/her task execution.

these tabs could be a contextual tabs or other, The application of Ribbon can be found in Word processor.

It should be noted that the bar across the top of an Office Online program that allows users to find the commands to complete a task is called the Ribbon

The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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