The radius of a piece of Nichrome wire is 0.315 mm. (Assume the wire's temperature is 20°C.) (a) Calculate the resistance per unit length of this wire. SOLUTION Conceptualize This table shows that Ni

The bullet takes 0.0025 seconds to pass through the wooden plank of 5 cm thickness when it is traveling horizontally with an initial speed of 30 m/s and a final speed of 10 m/s.

The time taken by the bullet to pass through the wooden plank can be determined using the equation of motion for constant acceleration.

Given:
Initial speed (u) = 30 m/s

Final speed (v) = 10 m/s

Distance (s) = 5 cm = 0.05 m

To find the time taken (t), we need to calculate the acceleration (a) first. We can use the equation:

v² = u² + 2as

Rearranging the equation, we have:

a = (v² - u²) / (2s)

Substituting the given values:

a = (10² - 30²) / (2 * 0.05)

Simplifying the expression:

a = (-800) / (0.1)

a = -8000 m/s²

The negative sign indicates that the acceleration is in the opposite direction of the initial velocity.

Next, we can use the equation of motion:

v = u + at

Substituting the values:

10 = 30 + (-8000) * t

Simplifying the equation:

-8000t = -20

Dividing by -8000:

t = 20 / 8000
t = 0.0025 s

Therefore, the time taken by the bullet to pass through the wooden plank of 5 cm thickness is 0.0025 seconds.


To find the time taken by the bullet to pass through the wooden plank, we need to calculate the acceleration first using the equation of motion.

By rearranging the equation and substituting the given values, we can find the acceleration.

Then, using the equation of motion again, we can solve for time.

The negative sign in the acceleration indicates that it is in the opposite direction of the initial velocity.

The resulting time is 0.0025 seconds.

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Yes, the official is correct. The rules state that when a player sets a rear screen he or she must give the defender enough time to avoid contact by making a move to the side of the screener.

What is contact?
Contact is the act of making physical contact or exchanging words with another person or object. More and more, the question is how on earth we would ever make contact with extraterrestrial life, not whether there's some other life in the universe. To establish communication, whether it be verbal, physical, or another type, is to "make contact" (the noun). It means to establish a certain communication to contact (the verb). Good luck if you're trying to get in touch with Madonna. She employs individuals whose sole responsibility it is to keep people like you from contacting her. Positive and negative contacts are present on batteries. They are the points of contact between the battery and the object receiving power.

Since B-2 had not yet placed a foot on the floor, A-1 did not give them enough time to avoid contact, therefore it was a team-control foul.

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Answer:

Answer: Magnitude = [____]; unit = [____].

Explanation:

= 870 Km ÷ 14.5 h

= 60 Km / h

The average speed of a car that travels 870 Km in 14.5 h is 60 Km/h.

ray4918 here to help..

For this problem, lets use the kinetic energy formula

Where m is equal to mass and v is equal to velocity

In our given, we have:

velocity = 60 m/s

kinetic energy = 6,025,000 J

Plug these numbers into the formula to get the mass

m = 3347.222 kg

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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Answer:

see below

Explanation:

You will need t find the volume of the sphere

 4/3 pi r^3    divide into the mass

1431 / (4/3 pi (5.8)^3) = 14 gm /cm^3

Explanation:

this is too though bro do it by ur self

Answer:

62400 cm

Explanation:

1 m = 100 cm

624m = 62 400 cm

Explanation:

CON EL TEOREMA DE PITÁGORAS

v = \(\sqrt{(12 km/h)^{2} + (25 km/h)^{2}}\) = 27.7 km/h

When two ultrasound waves with slightly different frequencies overlap, they create beats with a beat frequency equal to the difference between the frequencies.

The two ultrasound waves have the same velocity of 1550 m/s, the same initial phase, but different frequencies of 1 MHz and 1.1 MHz. We need to determine how these differences in frequency affect the waves.

The frequency of a wave determines the number of oscillations or cycles it completes in a given unit of time. In this case, the higher frequency wave completes 1.1 million cycles per second, while the lower frequency wave completes 1 million cycles per second.

Since the waves have the same velocity, we can use the formula velocity = frequency x wavelength to find the wavelength of each wave.

Let's assume the wavelength of the 1 MHz wave is λ. Then, the wavelength of the 1.1 MHz wave would be (λ / 1.1) because the higher frequency wave completes more cycles in the same unit of time.

Now, let's consider what happens when these two waves overlap. When two waves with the same frequency, amplitude, and phase overlap, they constructively interfere and produce a wave with an amplitude equal to the sum of their individual amplitudes.

However, in this case, the waves have different frequencies. As a result, they will have different wavelengths. When these waves overlap, they will not always be in phase with each other, leading to a phenomenon called beats.

Beats occur due to the interference between waves with slightly different frequencies. The resulting wave will have an amplitude that varies in time, creating a pattern of constructive and destructive interference.

The beat frequency is the difference between the frequencies of the two waves. In this case, the beat frequency would be 1.1 MHz - 1 MHz = 0.1 MHz or 100 kHz.

When two ultrasound waves with slightly different frequencies overlap, they create beats with a beat frequency equal to the difference between the frequencies.

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υx(t) is the x-component of the squirrel's velocity as a function of time. It represents the rate of change of the squirrel's x-position with respect to time.

To determine υx(t), the x-component of the squirrel's velocity as a function of time, you first need to know the squirrel's position function in the x-direction, which is represented as x(t). The position function could be given as a formula, or you might need to find it based on other information.

Once you have the position function x(t), you can find the x-component of the velocity by taking the derivative of x(t) with respect to time. This derivative, denoted as υx(t) or dx/dt, will give you the rate of change of the squirrel's x-position over time, indicating its velocity in the x-direction.

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Answer:

4.4 x 10^-12

Explanation:

:D

Answer:

Explanation:

Given:

q = 1.6·10⁻¹⁹ С - proton charge

V = 3.8·10⁷ m/s - proton speed

B = 0.72 T - magnetic field induction

_____________

F - ?

Lorentz force:

F = q·B·V

F = 1.6·10⁻¹⁹·0.72·3.8·10⁷ ≈ 4.4·10⁻¹² N

Force is directed to the right.

A. Number of Loops Test: Testing How the Number of Coils Affect the Strength of the Electromagnet of paper clips picked up by the 15 turn coil = 3 of paper clips picked up by the 30 turn coil = 5 of paper clips picked up by the 60 turn coil = 8

: Three data points are given in the Electromagnet Data Table A in which three different coils (with 15, 30 and 60 turns) are tested to find how many paper clips each coil can pick up. For the 15-turn coil, it can pick up 3 paper clips. Similarly, the 30 turn coil can pick up 5 paper clips. For the 60-turn coil, it can pick up 8 paper clips.Therefore  16 paper clips would be picked up with a 12 turn coil.B. Place an Iron Core in the Coil Test: Testing How an Iron Core Affects the Strength of the Electromagnet# of paper clips without iron core = 4# of paper clips with iron core = 9 the Electromagnet Data Table B shows that with the addition of an iron core in the coil, the number of paper clips picked up increases from 4 without the iron core to 9 with the iron core. So, by placing an iron core in the coil, the strength of the electromagnet increases.Predict # of paper clips with plastic core

:The number of paper clips with a plastic core is not given in the data table, so no prediction can be made based on the information provided.Increasing the Strength of an Electromagnet – Number of BatteriesC. Double the Current Through the Coil Test: How Doubling the Current Affects the Strength of the Electromagnet# of paper clips using 1 battery = 5# of paper clips using 2 batteries = 9Explanation:For this experiment, the Electromagnet Data Table C shows that by doubling the current through the coil from 1 battery to 2 batteries, the number of paper clips picked up increases from 5 to 9

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Answer:

67.56kg

Explanation:

Fapp+mg = ma

Fapp= applied force

mg = reactional force

g = acceleration due to gravity

Where g = 9.8m/s^2 a= 5 m/s2, Fapp= 1000N.

1000N = ma + mg

1000N = m( a+g )

1000N = m ( 5+9.8)

1000N = m×14.8

m = 1000÷14.8

m = 67.56kg.

Hence the mass of the wagon will be 67.56kg

Answer:

Yes,

Explanation:

Yes, Amanda is eligible for a tax deduction. Because of her medical expense. Her medical expense is $6,500 and it exceeds 7.5% of her adjusted gross income which is $60,000.

7.5% of $60,000 = 7.5/100 * 60000

7.5% of $60,000 = $4,500.

If 7.5% is $4,500, and her medical expenses is $6,500, then she's eligible for a tax deduction

Answer:

I think C.

Explanation:

I'm not sure

The bag would fall from the height with a zero force.

We know that the force has to do with the intensity with which the bag would land Let us note that the work that is done by the object would be equal to the product of the force and the distance that has been covered.

Also, the work done is equal to the mechanical energy of the bag that is falling. If the mechanical energy of the bag is 0 J and the distance that has been covered is 0.2 m.

W = F s

F = force

s = distance

F = W/s

F = 0/0.2

F = 0 J

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Answer:

A

Explanation:

A) Force of gravity is 20 N       Yes -   Force is measured in N

B) No.....mass is generaly measured in KG or sub units of it

C) No ... meters is a measure of distance not force

D) No   acceleration is  m/s^2

Answer:

Is this a true and false statement?

Explanation:

Answer:

We encounter occasions where one or more objects move in a frame which is non-stationary with respect to another observer. For example, a boat crosses a river that is flowing at some rate or an airplane encountering wind during its motion. In all such instances, in order to describe the complete motion of the object, we need to consider the effect that the medium is causing on the object. While doing so, we calculate the relative velocity of the object considering the velocity of the particle as well as the velocity of the medium. Here, we will learn how to calculate the relative velocity. .

×

Explanation:

Answer:

Relative velocity is the velocity of an object in proportion or with respect to another object.

The work done is 51.71 kJ.

We need to know about work done to solve this problem. The work done in compression depends on the pressure and change in volume. It can be determined as

W = P . ΔV

where W is work done, P is pressure and ΔV is change in volume.

From the question above, we know that

P = 25 psi

ΔV = 0.3 m³

Convert the pressure to pascal

25 psi = 172369 Pa

By substituting the given parameter, we can calculate the work done

W = P . ΔV

W = 172369 . 0.3

W = 51710.7 joule

Convert to kj

W = 51710.7 x 10¯³ kJ

W = 51.71 kJ

Hence, the work done is 51.71 kJ

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If a PV module is made up of 36 identical cells, the module current is 3.4 A, the module voltage is 19.8 V, and the module power is approximately 67.32 W.

To calculate the module current, voltage, and power for a PV module with 36 identical cells connected in series, we can use the given cell characteristics.

a) The module current is the same as the short-circuit current of each cell, which is given as I_SC = 3.4 A. So, the module current is 3.4 A.

b) To find the module voltage, we need to sum the diode voltage V_d of each cell. Since there are 36 cells and the diode voltage V_d of each cell is 0.55 V, the total module voltage is:

Module voltage = V_d * number of cells = 0.55 V * 36 = 19.8 V

c) To find the module power, we can multiply the module current and module voltage:

Module power = module current * module voltage = 3.4 A * 19.8 V ≈ 67.32 W

So, the module current is 3.4 A, the module voltage is 19.8 V, and the module power is approximately 67.32 W.

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Answer:

1) The Newton's law the Hulk is most closely demonstrating is the Third Law of motion

Newton's third law of motion states that action and reaction are equal and opposite.

2) The reason why the Newton's Law the Hulk is most closely demonstrating is the Newton's Third Law of Motion is that according to Newton's Third Law of motion, forces exist in pairs, the action of the Hulk when he leaps upward by pushing against the the Earth (which can be assumed stationary in relation to the Hulk), is equal to the reaction of the Earth, which moves down slightly, away from its initial position.

However, due to the large mass of the Earth, compared to the mass of the Hulk, the downward motion of the Earth due to the reaction force (equal to the force with which the Hulk leaps) is negligibly small, such that the Earth can absorb the Hulk's leap force by reacting mainly locally, at the leap point  by forming a crater, while the Earth in general, remains in the same place

Explanation:

Answer:

Selenium dichloride

Explanation:

Selenium (Se) and Chlorine (Cl) are both elements capable of combining together to form a compound with the chemical formula; SeCl2. Since the chlorine atom is more electronegative than selenium atom, the chlorine pulls more electrons towards itself to form an IONIC bond.

The SeCl2 compound formed is called Selenium dichloride as two atoms of Chlorine are needed to combine with one atom of Selenium to form the compound.

The name of the molecular compound is selenium dichloride (SeCl2).  

• Due to sharing of electrons between selenium and chlorine, Selenium dichloride is considered as covalent compound.  

• Both the elements are non-metals, and thus, would give rise to covalent bond.  

• Selenium is the least electronegative element of the two, so it is written first.  

• After that the more electronegative element is written, and then addition of suffix is done, that is, -ide.  

• If atoms of an element is more than one, then prefixes are supplemented that is mono for 1 atom, di for two atoms, and tri for three atoms.  

Thus, the name of the molecular compound is selenium dichloride.

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Gamma rays and radio waves both fall under the electromagnetic spectrum. Presented is a picture that shows the complete spectrum. But the optical telescope can only see the visible spectrum. As a result, it is limited to frequencies between \(400\)  and  \(700 nm\).

It is safe to infer that Mike will be observing the visible region of the electromagnetic spectrum, since he recently bought an optical telescope.

The capacity of a thing to attract other objects to it; connected with or produced by the magnetic force. Physics. The study of the relationship between magnetism and electricity is referred to as electromagnetism.

The colours of the rainbow that the human eye can see, from violet to red, are included in this region of the electromagnetic spectrum.

Therefore, the closest frequency Mike can see with his new device is in the visible light spectrum, which lies between ultraviolet and infrared on the electromagnetic spectrum.

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Answer:

Voltage difference V = 18 volt

Explanation:

Given:

Resistance R = 6 ohms

Current charge I = 3 amps

Find:

Voltage difference V

Computation:

Voltage difference V = [Current charge][Resistance]

Voltage difference V = 6 x 3

Voltage difference V = 18 volt

Answer:

Loss of momentum

Explanation:

Centripetal force is the name given to any force which causes a change in direction of velocity toward the center of the circular motion. The component of the force which is perpendicular to the velocity is the part resulting in the centripetal force

Answer:

The positive charges point away from each other

Explanation:

Why?

Arrows point away from the positive charge and toward the

negative charge.

Explanation:

Suppose that you rubbed a balloon with a sample of animal fur such as a wool sweater or even your own hair. The balloon would likely become charged and its charge would exert a strange influence upon other objects in its vicinity. If some small bits of paper were placed upon a table and the balloon were brought near and held above the paper bits, then the presence of the charged balloon might create a sufficient attraction for the paper bits to raise them off the table. This influence - known as an electric force - occurs even when the charged balloon is held some distance away from the paper bits. The electric force is a non-contact force. Any charged object can exert this force upon other objects - both charged and uncharged objects. One goal of this unit of The Physics Classroom is to understand the nature of the electric force. In this part of Lesson 1, two simple and fundamental statements will be made and explained about the nature of the electric force.

Perhaps you have heard it said so many times that it sounds like a cliché.

Opposites attract. And likes repel.

These two fundamental principles of charge interactions will be used throughout the unit to explain the vast array of static electricity phenomena. As mentioned in the previous section of Lesson 1, there are two types of electrically charged objects - those that contain more protons than electrons and are said to be positively charged and those that contain less protons than electrons and are said to be negatively charged. These two types of electrical charges - positive and negative - are said to be opposite types of charge. And consistent with our fundamental principle of charge interaction, a positively charged object will attract a negatively charged object. Oppositely charged objects will exert an attractive influence upon each other. In contrast to the attractive force between two objects with opposite charges, two objects that are of like charge will repel each other. That is, a positively charged object will exert a repulsive force upon a second positively charged object. This repulsive force will push the two objects apart. Similarly, a negatively charged object will exert a repulsive force upon a second negatively charged object. Objects with like charge repel each other.

The activity where to explore the relationships between the electricity field charged with particles and those of the hockey field

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To be carbon neutral we need  to offset your remaining emissions, which can be done by making financial contributions to initiatives that reduce atmospheric concentrations of greenhouse gases.

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