the period of an action potential when we are waiting for all voltage gated potassium ion channels to close. t/f

Based on the information that the speed

Answer:

B. I looked it up I hope it's right

Explanation:

i hope this helps.

Answer:

its obviously C

Explanation:

i smart like dat

A) To calculate the speed of the plane, we can use the formula for centripetal acceleration:

a = v^2 / r

where a is the centripetal acceleration, v is the speed of the plane, and r is the radius of the circular path.

We are given that the centripetal acceleration is 1g, which is equal to 9.8 m/s^2. We are also given the radius of the circular path as 200 m.

Substituting these values into the formula, we get:

9.8 m/s^2 = v^2 / 200 m

Solving for v, we get:

v = √(9.8 m/s^2 * 200 m) ≈ 44.2 m/s

Therefore, the speed of the plane is approximately 44.2 m/s.

B) To calculate the time required to make the turn, we can use the formula for the period of a uniform circular motion:

T = 2πr / v

where T is the period, r is the radius, and v is the speed of the object in uniform circular motion.

Substituting the given values, we get:

T = 2π(200 m) / (44.2 m/s) ≈ 28.6 s

Therefore, the time required to make the turn is approximately 28.6 seconds.

The magnitudes of the buoyant forces on blocks b and c are equal because both blocks have the same volume and are submerged in the same fluid. However, the magnitudes of the normal forces on blocks b and c may be different depending on their weights and the surface they are resting on.

Buoyant force is the upward force exerted on an object submerged in a fluid, and it depends on the volume of the object and the density of the fluid. Blocks b and c have the same volume and are submerged in the same fluid, so their buoyant forces are equal.

Normal force is the perpendicular force exerted by a surface on an object in contact with it. The magnitude of the normal force depends on the weight of the object and the surface it is resting on. If block b is heavier than block c and is resting on the same surface, then the magnitude of the normal force on block b will be greater than on block c however, if the surface is uneven or inclined, the normal forces may differ even if the blocks have the same weight.

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The work done against the gravitational force on the 2.1 kg briefcase when it is carried from the ground floor to the roof of the Empire State Building is 7812 joules (J).

To find the work done against the gravitational force, we can use the formula:

Work = Force * Distance * Cos(theta)

In this case, the force is the weight of the briefcase, which is equal to its mass times the acceleration due to gravity. The distance is the vertical climb from the ground floor to the roof, which is given as 380 m. The angle theta between the force and the displacement is 0 degrees, as the force and displacement are in the same direction.

First, let's calculate the weight of the briefcase:

Weight = mass * acceleration due to gravity
Weight = 2.1 kg * 9.8 m/s^2
Weight = 20.58 N

Now, let's calculate the work done:

Work = 20.58 N * 380 m * Cos(0 degrees)
Work = 20.58 N * 380 m * 1
Work = 7812 J

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The values are 12 inches=1 foot and 5,280 feet=1 mile. To convert 20 meters/second to miles/hour, we will use the following formula:

Meters are an SI unit of length; miles are a US customary unit of length. Meters are commonly used around the world; the US and UK more commonly use miles in everyday situations. The meter is a significantly smaller measurement of length than the mile.

`1 meter/second = 2.2369 miles/hour`

So,20 meters/second = (20 × 2.2369) miles/hour

= 44.738 miles/hour

Now, we can conclude that 20 meters/second is equal to 44.738 miles/hour.

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Answer:

spin the weals on the train

Explanation:

Answer:

A is the answer

Explanation:

come on man

Answer:

B) Friction force

Explanation:

if the object is heavy then it will need more force to move it unlike a tennis ball for example.

True. Keeping the terminals and cable connections clean helps to ensure a good electrical connection, which can prolong the life of the battery.

Keeping the terminals and cable connections of a battery clean is important for prolonging the battery's life. Dirt, corrosion, or other buildup on the terminals can create resistance in the circuit, which can lead to overheating and damage to the battery. This can cause the battery to charge and discharge less efficiently, reducing its overall capacity and lifespan. To clean the terminals, you can use a wire brush or a toothbrush with baking soda and water to scrub away any corrosion. Then, dry the terminals and cables thoroughly before reconnecting them to the battery. This will ensure a good electrical connection and a longer-lasting battery.

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Answer:

a

Explanation:

because red litmus paper turn blues under base or alkaline condition

Answer:

Convex lens

hope that helps you

The amount of gravitational potential energy required to lift a 9350-kg Progress spacecraft to the altitude of the International Space Station is approximately 8.4 x 10^11 joules.

Gravitational potential energy is given by the formula mgh, where m is the mass of the object being lifted, g is the acceleration due to gravity (9.8 m/s^2), and h is the height lifted. The altitude of the International Space Station is approximately 410 km above the surface of the Earth, which is equivalent to 4.1 x 10^5 meters. Therefore, the gravitational potential energy required to lift the Progress spacecraft to this altitude is approximately (9350 kg) x (9.8 m/s^2) x (4.1 x 10^5 m) = 8.4 x 10^11 joules.

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Answer:

earth and venus

Explanation:

The expression that would be used to represent the phrase, "two and one-half times the number of minutes spent exercising" is 2.5m.

In the given phrase, "two and one-half times the number of minutes spent exercising," we are asked to represent this as an expression using the variable m, where m stands for the number of minutes spent exercising.

"Two and one-half times" means that we are multiplying something by 2.5. Now, we need to multiply this 2.5 by the number of minutes spent exercising, which is represented by the variable m.

So, the expression becomes:

2.5 x m

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The full question is:

Which expression is used to represent the phrase two and one-half times the number of minutes spent exercising where m represents the number of minutes spent exercising?

The terminal velocity of a person falling in air depends upon the weight and the area of the person facing the fluid.The formula for terminal velocity is given by :vT= 2mg/ρACDwhere,m = mass of the bodyg = acceleration due to gravityρ = density of the fluid

A = area of the body facing the fluidCD = drag coefficientvT = Terminal VelocityWe have,A = 0.5 m² (Assuming the person to be standing)ρ = 1.2 kg/m³ (Density of air at 20°C and 1 atm pressure)CD = 1.0 (Approximate value for standing person)vT= 2mg/ρACD = 2 x 80 x 9.8 / (1.2 x 0.5 x 1.0) = 52.18 m/sNow, to convert this value into km/h, we have;vT (km/hr) = vT (m/s) x 18/5 (As 1 km/hr = 18/5 m/s)vT (km/hr) = 52.18 x 18/5 = 187.85 km/hrTherefore, the main answer is : The terminal velocity of a person falling in air (when the person is standing) is 52.18 m/s or 187.85 km/hr.Explanation :We know that the terminal velocity of a person falling in air depends upon the weight and the area of the person facing the fluid.

The formula for terminal velocity is given by :vT= 2mg/ρACDwhere,m = mass of the bodyg = acceleration due to gravityρ = density of the fluidA = area of the body facing the fluidCD = drag coefficientvT = Terminal VelocityFor this question, we know the value of A, ρ, and CD. We just need to find the value of m and g. As the person is falling in air, acceleration due to gravity, g = 9.8 m/s². We can assume the weight of a person to be 80 kg. Therefore, substituting these values in the above equation, we get:vT= 2mg/ρACD = 2 x 80 x 9.8 / (1.2 x 0.5 x 1.0) = 52.18 m/sNow, to convert this value into km/h, we have;vT (km/hr) = vT (m/s) x 18/5 (As 1 km/hr = 18/5 m/s)vT (km/hr) = 52.18 x 18/5 = 187.85 km/hrTherefore, the main answer is : The terminal velocity of a person falling in air (when the person is standing) is 52.18 m/s or 187.85 km/hr.

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The thermal energy from nuclear reactions is first converted to mechanical energy and finally to electrical energy for use by the community.

Nuclear energy is the energy produced as a result of changes that occur in the nucleus of atoms of elements. These changes are known as nuclear reactions.

Electrical energy can be generated from nuclear reactions.

The steps in the generation of electrical energy from nuclear reactions is as follows:

Therefore, the thermal energy from nuclear reactions is converted to electrical energy for use by the community.

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The International System of Units (SI) is a globally accepted standard system to measure length, temperature, time, amount of substance, and mass. It provides a consistent framework for measuring fundamental physical quantities.

The SI system ensures uniformity and facilitates accurate and reliable communication of measurements across different disciplines and regions.

By establishing precise definitions and internationally agreed-upon units, such as the meter, Kelvin, second, mole, and kilogram, the SI system enables scientists, engineers, and researchers worldwide to conduct experiments, make accurate calculations, and exchange data with ease and precision.

Its widespread adoption promotes compatibility, comparability, and coherence in the field of measurement.

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Answer:

b. 1.1 m/s c. -1.1 m/s

Explanation:

b.

m x v=f x t

The mass is 10 kg

10 x v (equation for momentum) = f x t (impulse)

you would find the impulse by finding the area under the graph, and then dividing by the mass

So in this case:

10 x v = 11

then divide by the mass

v = 11/10

v= 1.1 m/s

c.

F x t = impulse

we are trying to find force (magnitude)

impulse/t = F

we said that in order for it to stop the impulse for b would be 11, so if thats the case it would be 11 but it would be negative because when going in a positive direction and suddenly stopping the direction changes.

-11/t = F

to find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

-11/10 = F

F= -1.1 m/s

Answer B:

The velocity of the box at 10 seconds is :

              m x v=f x t

Given Information :

Mass(m)=10kg

Therefore, the velocity of the box at 10 seconds is 1.1m/s.

Answer C:

The magnitude and direction of that force be :

F x t = impulse

To find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

The magnitude and direction of that force will be -1.1m/s.

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Answer:

true

Explanation:

I did this unit for science

Answer:

Fetus

Explanation:

the outsiders I got nuggets out of the elder and I get to make it in and I got I got

The frequency of light released when an electron moves from the 2nd energy level to the 1st energy level in hydrogen is approximately 2.47 x 10^15 Hz.

The frequency of light released when an electron moves from one energy level to another can be calculated using the formula:

ΔE = hf

where ΔE is the change in energy, h is Planck's constant (approximately 6.626 x 10^-34 J·s), and f is the frequency of the light.

In hydrogen, the energy levels are given by the equation:

En = -13.6 eV/n^2

where En is the energy of the nth energy level and n is the principal quantum number.

To find the change in energy, we subtract the energy of the final state (first energy level) from the energy of the initial state (second energy level):

ΔE = E2 - E1

ΔE = (-13.6 eV / 2^2) - (-13.6 eV / 1^2)

ΔE = -13.6 eV (1/4 - 1)

Now, we can calculate the frequency of light using the formula:

ΔE = hf

f = ΔE / h

f = (-13.6 eV (1/4 - 1)) / (6.626 x 10^-34 J·s)

Note: We need to convert electron volts (eV) to joules (J) by using the conversion factor 1 eV = 1.602 x 10^-19 J.

f = (-13.6 x 1.602 x 10^-19 J (1/4 - 1)) / (6.626 x 10^-34 J·s)

f ≈ 2.47 x 10^15 Hz

Therefore, the frequency of light released when an electron moves from the 2nd energy level to the 1st energy level in hydrogen is approximately 2.47 x 10^15 Hz.

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If the amount demand of a product changes more than proportionally as its price rises or falls, then it is said to be elastic.

The more replacements there are for an item, more elastic the good is, according to definition of an elastic good, which is where change in price results in a large movement in demand. Price elasticity of demand is determined by dividing percentage change in quantity required by the percentage change in price.

Products like cars, appliances, and luxury items that are rarely purchased are examples of elastic commodities. In the event that the cost of these products is momentarily high, consumers may decide to put off buying.

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Answer: we are given the mass of an aluminum sculpture which is 145 kg and a horizontal force equal to 668 Newtons. The coefficient of friction can be determined by dividing the horizontal force by the weight of the object. In this case, 668 N / 145 * 9.8 equal to coeff of friction of 0.47

Answer:

a lever that is what is used

without knowing the specific value of n, it is not possible to calculate the z-transform at z = 3.73 accurately.The z-transform of the sequence -a^u[-n-1], where a = 7.51, is given by:

X(z) = -a^u[-n-1] * z^(-n)

The region of convergence (ROC) for this z-transform is determined by the values of a and the magnitude of z. Since a = 7.51, the ROC will be outside the circle with radius |a| = 7.51 in the z-plane, i.e., |z| > 7.51.

To find the value of the z-transform at z = 3.73, substitute z = 3.73 into the equation:

X(3.73) = -a^u[-n-1] * (3.73)^(-n)

Unfortunately, without knowing the specific value of n, it is not possible to calculate the z-transform at z = 3.73 accurately.

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