t=4s2. A boat accelerates at a rate of 6.0 m/s down the river. How much time will it takethe boat to speed up to 70 m/s?

Answer:

SI unit

Explanation:

The kilogram-meter per second (kg · m/s or kg · m · s -1 ) is the standard unit of momentum. Reduced to base units in the International System of Units        ( SI ), a kilogram-meter per second is the equivalent of a newton-second       (N · s), which is the SI unit of impulse .

Answer:

Plasma is a phase of matter that makes up stars.

The density of the metal is  determined as  6.1 g / cm³.

The density of the metal is defined as the ratio of the mass per unit volume of the metal.

Mathematically, the formula for density is given as;

ρ = m / V

where;

The density of the metal is  calculated as follows;

ρ = ( 0.47 kg x 1000 g/kg ) / ( 77 cm³ )

ρ = 6.1 g / cm³

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The answer to the question is that the acceleration equals 4.9 m/s² and the cord tension is 58.8 N.

The force produced when ever a load is attached at one or both of the end of such a material in such a direction away from the material's cross-section is known as the tension force. It's frequently referred to a tension force as a "pushing" force.

(a) Let's use Newton's Second Law for Movement to our example:

\($$\begin{gathered}T-m_1 g=m_1 a, \\T-m_2 g=-m_2 a .\end{gathered}$$\)

Eliminating \($T$\), we get:

\($$\begin{gathered}\left(m_2-m_1\right) g=\left(m_1+m_2\right) a, \\a=\frac{\left(m_2-m_1\right) g}{m_1+m_2}, \\a=\frac{(12 \mathrm{~kg}-4 \mathrm{~kg}) \cdot 9.8 \frac{\mathrm{m}}{\mathrm{s}^2}}{4 \mathrm{~kg}+12 \mathrm{~kg}}=4.9 \frac{\mathrm{m}}{\mathrm{s}^2} .\end{gathered}$$\)

(b) By adding "a" to the first equation, we can get the cord's tension:

\($$T=m_1(a+g)=4 \mathrm{~kg} \cdot\left(4.9 \frac{\mathrm{m}}{\mathrm{s}^2}+9.8 \frac{\mathrm{m}}{\mathrm{s}^2}\right)=58.8 \mathrm{~N}$$\)

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Explanation:

First find current inorder to get guantity of

charge, current =volts /resistance

After getting current ( I) we take the formula which say current =quantity of charge / unit of time

The refraction of a sound wave occurs when the sound wave bends as it passes through the boundary between media. Refraction occurs when there is a difference in the speed of sound waves in two different media.

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The answer is 40 kg. m/s.

Formula for momentum:

p=mv

p=(10 kg.)(4 m/s)

So, therefore, the final answer is p=40 kg. m/s.

I hope this helped answer your question. Enjoy your day, and take care!

Answer: its 400 n/s

Explanation:

cus my thing said it was right

To ensure basic human dignity in relation to safe and healthy living, governments can implement various measures such as accessible healthcare, adequate housing, and sanitation and clean water.

Governments should place a high priority on ensuring that everyone has access to healthcare services, enabling them to receive the essential medical care without suffering financial difficulty. This entails providing access to necessary pharmaceuticals, cheap healthcare, and a strong healthcare system.

All citizens should have access to affordable and good housing, according to governments. Policies may include restrictions on rental costs, programs to expand the supply of affordable housing, and efforts to combat homelessness. Basic hygienic and safety criteria should be met by housing.

Governments must make sure that everyone has access to clean, safe drinking water and adequate sanitary facilities. The spread of diseases and the maintenance of sanitary living circumstances can be aided by investments in sewage systems, water treatment facilities, and public hygiene education.

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Answer:

Consider an n-type silicon semiconductor at T = 300°K in which Nd = 1016 cm-3 and Na = 0. The intrinsic carrier concentration is assumed to be ni = 1.5 x 1010 cm-3. - Comment Nd >> ni, so that the thermal-equilibrium majority carrier electron concentration is essentially equal to the donor impurity concentration.

Explanation:

Answer:

36 kmp or 22.37 mph

Given data:

* The initial velocity of the jumper is u = 9.1 m/s.

* The horizontal range in the given case is 8 m.

Solution:

(a). By the kinematic equation, the time taken by the jumper in terms of the initial velocity and the horizontal range is,

where a is the acceleration of the jumper in the horizontal direction,

As there is no force acting on the jumper in the horizontal direction, thus, the value of acceleration is zero.

Substituting the known values,

Thus, the time for which the jumper remains in the air is 0.88 seconds.

(b). By the kinematics equation, the initial velocity of the jumper in the upward direction is,

where u_y is the initial velocity, v_y is the final velocity of the jumper at the top of vertical displacement, g is the acceleration due to gravity, and t' is the time taken by the jumper to reach the top of vertical displacement,

The jumper will come to rest at the higher position, thus, the final velocity of the jumper at the highest position is zero.

The time taken by the jumper to reach the maximum height is equal to the time taken by the jumper to reach the ground from the maximum height.

As the total time for the complete motion of the jumper is t, thus, the time taken by the jumper to reach the maximum height from the ground is,

Substituting the known values in the equation (1),

By the kinematics equation, the maximum height reached by the jumper is,

Substituting the known values,

Thus, the maximum height reached by the jumper is 0.95 meters.

Answer:

Explanation:

A rocket of mass 2000 kg is ejecting the gases at the rate of 50 kg/sec with a speed of 20 m/second in gravity free space. you can search your question on the internet or search it up on Quora

Based on the information, it should be noted that the resistance R is 0.5 Ω.

When S1 and S2 are open, i leads e by 30°. In this case, the circuit consists of only the inductor (L) and the capacitor (C) in series. Therefore, the impedance of the circuit can be written as:

Z = jωL - 1/(jωC)

Since i leads e by 30°, we can express the phasor relationship as:

I = k * e^(j(ωt + θ))

Z = jωL - 1/(jωC) = j(120π)L - 1/(j(120π)C)

Re(Z) = 0

By equating the real parts, we get:

0 = 0 - 1/(120πC)

Let's assume that there is a resistance (R) in series with the inductor and capacitor. The impedance equation becomes:

Z = R + jωL - 1/(jωC)

Z = R + jωL

Im(Z) = ωL > 0

Substituting the angular frequency and rearranging the inequality, we have:

120πL > 0

L > 0

This condition implies that the inductance L must be greater than zero.

When S1 and S2 are closed, i has an amplitude of 0.5 A. In this case, the impedance is:

Z = R + jωL - 1/(jωC)

Since the amplitude of i is given as 0.5 A, we can express the phasor relationship as:

I = 0.5 * e^(j(ωt + θ))

By substituting this phasor relationship into the impedance equation, we can determine the value of R. The real part of the impedance must be equal to R:

Re(Z) = R

Since the amplitude of i is 0.5 A, the real part of the impedance must be equal to 0.5 A: 0.5 = R

Therefore, the resistance R is 0.5 Ω.

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The cart is in equilibrium since it's moving at a constant velocity. This means the net horizontal force on the cart is 0, so the frictional force and pulling force cancel one another. So the pulling force has magnitude 12 N, same as the frictional force.

Answer:

For two universe that is the same size, the universe with the faster expansion rate must be younger than the universe with a slower expansion rate. The slope in the line of the Hubble plot of the older universe will be flatter.

Explanation:

Hubble's law establishes a direct relationship between a galaxy's distance and its redshift-determined recessional velocity. The redshifts of galaxy clusters and distant galaxies are equivalent and proportional to their distances from us, according to Hubble's theorem.

Thus, to copy and complete the given question.

For two universe that is the same size, the universe with the faster expansion rate must be younger than the universe with a slower expansion rate. The slope in the line of the Hubble plot of the older universe will be flatter.

A. The weight of the mass on the earth is 117.6 N

A. The weight of the mass on the moon is 19.56 N

Weight is defined as follow:

Weight (W) = mass (m) × Acceleration due to gravity (g)

W = mg

Now we shall determine the weight. Details below:

A. Weight on earth

Weight (W) = mass (m) × Acceleration due to gravity (g)

Weight (W) = 12 × 9.8

Weight on earth = 117.6 N

B. Weight on moon

Weight (W) = mass (m) × Acceleration due to gravity (g)

Weight (W) = 12 × 1.63

Weight on moon = 19.56 N

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Complete question:

The force of gravity on the Moon is said to be one-sixth of that on the Earth. What would a mass of 12 kg weigh; (a) on the Earth (b) on the moon

The diameter of the smaller end of the pipe is approximately 0.78 meters.

To determine the diameter of the smaller end of the pipe, we can use the principle of conservation of mass. According to this principle, the mass flow rate of water should remain constant throughout the pipe.

The mass flow rate is given by the equation:
Mass flow rate = density of water * cross-sectional area * velocity

Since the density of the water remains constant, we can write:
Cross-sectional area1 * velocity1 = Cross-sectional area2 * velocity2

Given that the velocity1 is 13 m/s, the diameter1 is 1.2 m, and the velocity2 is 30 m/s, we can solve for the diameter2 using the equation:
(pi * (diameter1/2)^2) * velocity1 = (pi * (diameter2/2)^2) * velocity2

Simplifying the equation:
(1.2/2)^2 * 13 = (diameter2/2)^2 * 30

Calculating the equation:
(0.6)^2 * 13 = (diameter2/2)^2 * 30

0.36 * 13 = (diameter2/2)^2 * 30

4.68 = (diameter2/2)^2 * 30

Dividing both sides by 30:
0.156 = (diameter2/2)^2

Taking the square root of both sides:
0.39 = diameter2/2

Multiplying both sides by 2:
0.78 = diameter2

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The solution with the lowest total ion concentration, assuming full dissociation, is 2 M aluminum sulphate.

Concentration in chemistry is defined as the abundance of an ingredient divided by the total volume of a combination. There are four sorts of mathematical descriptions: mass concentration, molar concentration, number concentration, and volume concentration. The amount of a material, such as salt, that is present in a certain amount of tissue or liquid, such as blood. When there is less water present, a material becomes more concentrated. When a person does not drink enough water, the salt in his or her urine may become more concentrated. A substance's concentration is the amount of solute contained in a given amount of solution. Molarity is the number of moles of solute in one liter of solution and is used to express concentrations.

Here,

The solution with the lowest total ion concentration, assuming full dissociation, is 2 M aluminum sulfate.

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If I were an astronaut, the first job I would do on the International Space Station (ISS) would be to familiarize myself with the station and its systems.

I would need to learn how to operate the various equipment and how to maintain the station in good working order. I would also need to learn the procedures for conducting experiments and for performing spacewalks.

Once I had a good understanding of the station and its systems, I would begin working on my assigned tasks. These tasks could include conducting experiments, performing maintenance, or teaching other astronauts new skills. I would also take the opportunity to conduct research on my own and to learn more about the space environment.

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Given that hotter blackbodies produce more energy than cooler blackbodies,  cooler red giants have much higher luminosities than much hotter white dwarfs.

The hotter blackbodies emits more light as compared to the cooler blackbodies over all the wavelength. A blackbody emits light over all wavelength. the red giant is a star , hydrogen is fused to helium core to stat the fusion reactions. this hydrogen fusion caused the star to expand. the sun becomes red giant it will swell up to size of earth orbit.  This gives a red color and make red giant much hotter. while the white dwarf comes after the red giant . white dwarf is also very hot but it is not hot enough to star fusion reaction in carbon and oxygen.

Thus, Given that hotter blackbodies produce more energy than cooler blackbodies,  cooler red giants have much higher luminosities than much hotter white dwarfs.

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Composed functions are useful for evaluating complex systems, but it is important to understand the range and domain of both functions to ensure that the composed form is valid.

Understanding how composed functions operate within a system is essential to understanding mathematics. Composed functions are essentially a combination of two functions, usually denoted as f(g(x)) or g(f(x)).

The domain of a composed function is the set of all possible input values from the first function, which can either be the same as the domain of the first function or a subset of it.

Similarly, the range of a composed function is the set of all possible output values from the second function, which can either be the same as the range of the second function or a subset of it.

For two functions to be composed, they must be compatible in the sense that the range of the first function is the same as the domain of the second function.

Otherwise, the composed form of the two functions would not make sense mathematically. In addition, some pairs of functions can be composed only for certain values of x, meaning that a composed function may not be valid for all possible input values.

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The time required for the sound of the splash to reach the girl's ear is 0.118 s.

This is an audible form of energy that is radiated from a source.

To calculate the time required for the sound of the splash to reach the girl's ear, we use the formula below.

Formula:

Where:

Make t the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The time required for the sound of the splash to reach the girl's ear is 0.118 s.
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Less gas will be collected because some of the gases will escape from the open cylinder valve.

Cylinders used to store carbon dioxide will have thicker walls than those of butane because of higher pressures.

Compressed gases are gases which are compressed under high pressure in gas cylinders.

Cylinder valves are used to reduce the pressure of the compressed gases and in the process, some of the gas molecules escape.

Since the cylinder valve is open and the gas is collected at atmospheric pressure, less gas will be collected because some of the gases will escape.

Since, the carbon dioxide not liquefy under pressure compared to butane, the cylinders used to store carbon dioxide will have thicker walls than those of butane.

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Answer:

D

Explanation:

I believe its D because A wouldn't really make sense, having to see the cake doesn't have anything to do with it changing so its not B, and C doesn't make sense because the time frame doesn't matter, D makes sense because it has to do with heat energy

The last step in the direction is to put the cake batter in the oven because the heat energy from the oven causes the batter to change into the cake.

A temperature difference causes energy to flow through one body to another, known as heat. Energy is transferred, or heat flows, when two bodies of differing temperatures are brought together. The hotter body goes to the cooler.

Typically, but not always, this energy transfer causes the temperature of a colder body to rise and the heat of the region of high temperature to fall.

Shifting from one physiological body (or phase) to another, such as melting from a solid to a liquid, sublimation from a solid to a vapor, boiling from a liquid to a vapor, or changing from one solid form to another, allows a substance to absorb heat without increasing in temperature.

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Answer: it would take 4 seconds

Explanation:

Answer:

reaction force is 3N

Explanation:

The question is not complete.

From estudyassistant, I've gathered that the action force pushing the air out of the balloon is -3N.

Now,from Newton's third law of motion, it says, for every action, there is an equal and opposite reaction.

Thus, the reaction force will be equal and opposite in direction to the action force.

Thus, reaction force is 3N

Answer:

3n

Explanation:

edge 2021

Answer:

c

Explanation:

Answer:

c

Explanation:

csCA

The speed of the wave on the vibrating string is 17,080 m/s.

In a standing wave on a vibrating string, the length of the string is related to the wavelength of the wave. In the harmonic shown in the figure, we can observe one complete wavelength in the length of the string, which means the length of the string is equal to one wavelength.

Since the frequency of the vibrating motor is given as 854 Hz, we can use the formula v = fλ to calculate the speed of the wave. Here, v represents the speed of the wave, f represents the frequency, and λ represents the wavelength.

Since the length of the string is equal to one wavelength, we can substitute the length of the string (20 m) for the wavelength (λ).

v = fλ

v = (854 Hz)(20 m)

v = 17,080 m/s

Therefore, the speed of the wave on the vibrating string is 17,080 m/s.

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An electron is moving to the right with an initial speed of vo = 3.5 x 10E7 m/s when it enters a

region of space that is L = 3.3 cm wide with a uniform electric field pointing down of magnitude

E = 8.2E4 N/C. The electron will experience electric field

The electron will experience a force due to the electric field, which is given by the equation F = qE, where q is the charge of the electron (a negative value) and E is the electric field.

The force will cause the electron to accelerate in the direction of the field, which is opposite to its initial direction of motion. The acceleration of the electron can be calculated using the equation a = F/m, where m is the mass of the electron.

The distance the electron will travel before it exits the region of space can be calculated using the equation x = v_0t + 0.5a*t^2, where v_0 is the initial velocity and t is the time it takes for the electron to travel through the region.

Therefore, the correct answer is as given above

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The complete question goes thus:

An electron is moving to the right with an initial speed of vo = 3.5 x 10E7 m/s when it enters a

region of space that is L = 3.3 cm wide with a uniform electric field pointing down of magnitude

E = 8.2E4 N/C. What will happen to the electron?