find the components to write this vector in unit vector notation: 63.5 A ​please help

Answer: Volume and mass

Explanation: I took the quiz lol

Answer:

A proposed answer to a s scientific problem is a hypothesis.

Answer:

39,000 Joules of Work

Explanation:

Work can be found out through the change in Kinetic Energy.

W = ΔKE

Change in KE is:

\(W = KE_{Final} - KE_{Initial}\)

Expand the equation you get:

\(W=\frac{1}{2} mv^{2}_{f} -\frac{1}{2} mv^{2}_{i}\)

Plugin the known values and solve:

\(W=\frac{1}{2} (500)(16)^{2} -\frac{1}{2} (500)(10)^{2}\)

\(W=(250)(256) -(250)(100)\)

\(W=64000-25000\)

\(W=39000 J\)

The voltage across the inductor is 0 volts (c) because the inductor in a circuit reaches a steady-state condition.

When the switch in a circuit is closed for a long time, the inductor reaches a steady state. In this steady state, the inductor behaves like a short circuit, causing the voltage across it to be zero volts. This occurs because inductors resist changes in current flow. Initially, when the switch is closed, the inductor resists the sudden change in current, causing a back-emf to be generated. However, as time goes on and the current stabilizes, the inductor no longer opposes the flow of current, resulting in a voltage drop of zero volts across the inductor.

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The ball will take 3 seconds to get to the top of its trajectory When it is launched from the ground with a horizontal speed of 30 m/s and a vertical speed of 30 m/s

When any object is thrown from horizontal at an angle θ except 90°, then the path followed by it is called trajectory, the object is called projectile and its motion is called projectile motion.

Here, we have a type of motion called projectile motion and it is pretty similar to an upside down parabola. The top of the trajectory is the vertex of the parabola and is also when v = 0.

Given :

This problem is now relatively easy because we only need to find the vertical distance so we can ignore horizontal speed and use

vy = vy0 + ayt

Plug in our givens

0 = 30  - 10t

solve for t

t = 3 seconds

Hence, The ball will take 3 seconds to get to the top of its trajectory When it is launched from the ground with a horizontal speed of 30 m/s and a vertical speed of 30 m/s

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The height of the hill, given the radius and mass of the Earth can be found to be 2.5 km.

We can use the conservation of energy to solve this problem. The potential energy of the stone at the top of the hill is equal to its gravitational potential energy, which is given by:

PE = mgh

Solving for height , we get:

h = (G x M x m) / (R x m x g)

h = (6.67 x 10^-11 x 6 x 10^24 x 40) / ((6.4 x 10^6 + h) x 9.8)

h = 2.5 km

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The claim can be Cosmetics, hygiene, and cleaning product emissions may be dangerous.

Evidence 1: Effect of Air Quality

Volatile organic compounds (VOCs), including formaldehyde, benzene, and toluene, can be found in a variety of cosmetic, hygiene, and cleaning goods. These VOCs have the potential to evaportate and cause indoor air pollution.

Environmental impact is evidence number two

Cosmetics, hygiene, and cleaning goods can have a detrimental environmental impact during manufacturing, usage, and disposal. Microplastics and certain chemicals are among the substances present in these items that may find their way into rivers and endanger aquatic life.

Evidence 3: Worker health effects

Occupational health risks can be present for workers who manufacture and produce hygiene, cleaning, and cosmetic items.

Reasoning: It is clear from the research that emissions from cosmetic, hygiene, and cleaning goods have the potential to be harmful.

Thus, this way, harmful are the emissions from cosmetics, hygiene, and cleaning products.

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The solubility of the sample will decrease

An atom with only 1 to 3 valence electrons will tend to lose/subtract those valence electrons. That is option D.

Valence electrons are those electrons that are located at the outermost layer of an atom.

During a chemical reaction, elements that have 1 or 2 or 3 valence electrons donate or give out their electron to form a chemical bond with another aton if an element.

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A force of 1150 N acts parallel to ramp to push a 250 kg gun safe into a moving van. The ramp is frictionless and inclined at 17 degree

a) To find the acceleration of the safe up the ramp,
1. Determine the component of the force parallel to the ramp: F_parallel = 1150 N
2. Calculate the gravitational force acting on the safe along the ramp: F_ gravity = m * g * sin(theta) = 250 kg * 9.81 m/s^2 * sin(17 degrees) ≈ 729.6 N
3. Calculate the net force acting on the safe: F_ net = F_ parallel - F_ gravity = 1150 N - 729.6 N ≈ 420.4 N
4. Use Newton's second law to find the acceleration: F_ net = m * a, so a = F_ net / m = 420.4 N / 250 kg ≈ 1.68 m/s^2

The acceleration of the safe up the ramp is approximately 1.68 m/s^2.

b) To find the acceleration of the safe considering friction, follow these steps:
1. Determine the friction force: F_friction = 120 N
2. Calculate the net force acting on the safe, considering friction: F_net_with_friction = F_parallel - F_gravity - F_friction = 1150 N - 729.6 N - 120 N ≈ 300.4 N
3. Use Newton's second law to find the acceleration with friction: a_with_friction = F_net_with_friction / m = 300.4 N / 250 kg ≈ 1.20 m/s^2

When considering friction, the acceleration of the safe up the ramp is approximately 1.20 m/s^2.

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Answer: 11

Explanation:

Answer:

in a generator mechanical energy is a device that converts a form of energy into electricty

The energy conversion provided by the generators is: mechanical to electrical energy. Hence, option (A) is correct.

An electric generator is a device that generates electric energy, which can either be immediately delivered to houses, businesses, and other structures or stored in batteries. Electromagnetic induction is the basis for how electric generators operate.

A horseshoe-shaped magnet's poles are quickly rotated around a conductor coil, which is a copper coil that has been tightly wound onto a metal core. An armature is made up of a conductor coil and a core. The armature is rotated by a mechanical energy source, such as a motor, by means of a shaft connection.

The magnetic field that exists between the magnet's two poles is broken off when the coil turns. The conductor's electrons will interact with the magnetic field, causing an electric current to flow through it.

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Answer:

It is when the focus of the ellipse that is closer to the point where Mars is moving the fastest.

Explanation:

I hope it helps! Have a great day!

Anygays-

Answer:

5.0 kg

Explanation:

use the equation; (m1v1i) + (m2v2i) = (m1v1f) + (m2v2f)

Answer

A spherical bob creates more control for the simple pendulum experiment. An irregular bob like a large piece of paper for instance, will create too much air resistance for a basic classical experiment to yield predictable results within the academic lab.

Answer:

The heat necessary to warm 500g of water from 20°C to 65°C is 37,620 J.

Explanation:

GIVEN: m = 500 gm, T₂ = 65°C AND T₁  = 20°C, we know that c (specific heat capacity) = 4180

TO FIND: The heat necessary to warm 500g of water from 20°C to 65°C.

SOLUTION:

By using the heat equation,

              Q=m c ΔT  

             ΔT = T₂ - T1

             ΔT = 65 - 20 = 45°C

In this case,

Q = 0.2 × 4180 × 45 = 37,620 J

For Problem Three:
11. The time constant for this circuit is given by τ = L/R = 12.0mH / 2.00Ω = 6.00ms. To find the time it takes for the current to reach 80% of its maximum value, we can use the equation I = Imax * (1 - e^(-t/τ)), where Imax = EMF/R is the maximum current that the circuit will reach. Solving for t, we get t = -τ * ln(1 - 0.80 * R/EMF) = -6.00ms * ln(1 - 0.80 * 2.00Ω/10.0V) ≈ 3.21ms. Therefore, the answer is (A) 3.21ms.

12. After the switch is connected to point b, the circuit behaves like a simple RL circuit. The current in an RL circuit at any time t is given by I = Imax * e^(-t/τ), where Imax = EMF/R is the maximum current that the circuit will reach and τ = L/R is the time constant. After two time constants have passed (i.e. t = 2τ), the current in the circuit will have decayed to I = Imax * e^(-2) ≈ 0.135 * Imax. Therefore, we need to find Imax first: Imax = EMF/R = 10.0V/2.00Ω = 5.00A. Then, the current after two time constants have passed is I = 0.135 * Imax = 0.135 * 5.00A ≈ 0.677A. Therefore, the answer is (E) 0.677A.

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Given the length of the one-dimensional box, L, as 1.00 nm (1.00 × 10⁻⁹ m), the energy of an electron in the box can be calculated using the formula En = n²h²/8mL², where n is the quantum number, h is Planck's constant, m is the mass of an electron, and L is the length of the box.

To find the energy difference between two levels, n₁ and n₂, we use the formula ΔE = E(n₂) - E(n₁), where E represents the energy.

Using the values n₁ = 3 and n₂ = 2, and substituting the given constants, we find ΔE = 3.07 × 10⁻¹⁹ Joules.

The frequency of the photon emitted is calculated using the formula ν = ΔE / h, where ν represents frequency and h is Planck's constant. Substituting the calculated value of ΔE, we find ν = 4.63 × 10¹⁴ Hz.

To determine the wavelength of the emitted photon, we use the equation λ = c / ν, where λ represents the wavelength and c is the speed of light. Substituting the given values, we find λ = 6.47 × 10⁻⁷ m or 647 nm.

Therefore, the wavelength of the emitted photon is 6.47 × 10⁻⁷ m or 647 nm, and the frequency is 4.63 × 10¹⁴ Hz or 463 THz.

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C-type asteroids correspond to carbonaceous chondrites. S-type asteroids are similar to the most common stony meteorites. M-type asteroids are similar to iron meteorites.

Asteroids are classified into three broad composition classes: C-, S-, and M-types.

The most common asteroids are C-type (chondrite). They are dark in appearance and are most likely made of clay and silicate rocks. They are among the solar system's oldest objects.

The S-types ("stony") are composed of silicates and nickel-iron.

M-types are metallic (nickel-iron). The composition of asteroids changes according to the distance from the Sun. After they formed and partially melted, some experienced high temperatures, with iron sinking to the centre and forcing basaltic (volcanic) lava to the surface.

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but I think it's a and f

and

b and e

The complete question is

A 45-kg child sits on a 3.2-kg tire swing. The tension on the rope is 470 N. The tree branch sags and the child's feet rest on the ground. If the tension in the rope is reduced to 220 N, what is the value of the normal force being exerted on the child's feet?

Answer:

Therefore the Normal force is being exerted on the child's feet is 252.36( 250N).

Explanation:

We are given

mass of child = 45kg

mass of the tire = 3.2kg

g = 9.8 m/s^2

We have the first case in which the tire is in swing so tension in that case will be which is the resultant force.

Fr = Resultant force

Ft =  Tension force

Fg= Gravitational force

Fr = Fg + Ft

0 = -mg + Ft

Ft = mg

   = (45+3.2)*9.8

   = 48.2 * 9.8

Ft = 472.36N  ( which is close to 470)

In the second case the child is in the rest position, The resultant force will be zero.

Fr = Ft + Fn + Fg  ( Normal force is denoted by Fn )

0 = Ft + Fn + Fg

Fn =  -Fg -Ft

Fn = mg -Ft

    = 472.36 - 220

Fn  = 252.36N  ( close to 250N)

Therefore the Normal force being exerted on the child's feet will be 252.36N.  

Answer:

fdsbgdfshtrsnbfgsbnhgr

Explanation:

cdfrgresgtrshtrwhtrwhtwjhdgngdabfeahydrtgnb

The length of brass rod after expansion is 2.0036m.

By definition, the length increase is:

Delta L = Alpha L_0 Delta TΔL=αL

naΔT

where alpha = 18 times 10^{-6}K^{-1}α=18×10−6

K-1

is expansion, L0 = 2 ml

na=2m is the initial length and Delta T = 100KΔT=100K is the temperature change. How to get:

Delta L = 18 times 10^{-6}cdot 2cdot 100 = 3.6 times 10^{-3} = 0.0036mΔL=18×10

−6

⋅2⋅100=3.6×10

−3

= 0.0036 meters

So the final length is:

L = L0 + delta L = 2 m + 0.0036 m = 2.0036 ml = l

0

na

+ΔL=2m+0.0036m=2.0036m

Linear expansion is the rate of increase in length of a solid sample per unit rise in temperature. If the length of the sample increases from l1 to l2 as the temperature increases by θ°, the expansion (α) is given by

l2 = l1(1 + αθ). This relationship assumes that α is independent of temperature.

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The carbon isotope was cobined with the proton to produce the nitrogen isotope hence it is a fusion reaction.

The term nuclear fusion refers to a kind of reaction in which two nuclei fuse together to give rise to a single nuclei with the evolution of energy.

We can see that the carbon isotope was cobined with the proton to produce the nitrogen isotope hence it is a fusion reaction.

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Answer:

A. Nuclear fusion

Explanation:

got it right, trust

Explanation:

This is the correct answer...

I hope you understand...

In the context of an experiment using water displacement as an output for gas production, vapor pressure can play a role in the experiment in a few ways like gas Collection, gas Solubility, water Vapor Contribution.

1. Gas Collection: The vapor pressure of water can affect the gas collection process. When a gas is generated in the experiment, it displaces water in a container or tube. The vapor pressure of water determines the partial pressure of water vapor in the gas phase, which can affect the total pressure inside the container or tube. This information is crucial for accurately measuring the volume of gas produced by accounting for the partial pressure of water vapor.

2. Gas Solubility: The vapor pressure of water also influences the solubility of certain gases in water. Different gases have varying solubilities in water, and the vapor pressure of water can affect the rate at which gases dissolve or come out of solution. This can impact the gas production rate in the experiment, as gases may dissolve in water before being collected.

3. Water Vapor Contribution: Water vapor itself can be produced as a result of the experimental conditions, especially if water is heated or if the reaction produces water as a byproduct. The presence of water vapor adds to the total pressure inside the gas collection system. Therefore, when measuring the volume or pressure of the gas collected, it is essential to consider and account for the contribution of water vapor to the total pressure.

It is important to carefully consider the vapor pressure of water and its potential effects on gas collection and measurement accuracy in the experimental setup. By understanding and accounting for these factors, researchers can ensure accurate and reliable results in the experiment.

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23.38 ° to the positive x-axis

Explanation

Step 1

draw the vectors

Step 2

add the vectors, ( component to component)

so

a) get the components of V1

b) components of V2

c) add

so, the magnitude of the displacement is

finally, the direction

as we have a rigth triangle

let

opposite side= 12.9

adjacent side=23.8

Now, use the tan function to find the angles

so

therefore, the direction of the resultant is

23.38 ° to the positive x-axis

I hope this helps you

By keeping their centre of gravity over the beam, a gymnast may balance himself. The gymnast increases their moment of inertia, or resistance to rotational motion, by spreading their arms out to the sides, making it harder to unintentionally tilt or spin. As a result, their body is more stable, aiding in balance maintenance. Moreover, the centre of mass can be slightly adjusted with the arm movements to make up for any minor deviations from the equilibrium position. The gymnast can also orient oneself in relation to the beam using the visual clues provided by the arms. Overall, while balancing on a beam, a gymnast can gain various advantages from extending their arms to the side, including increased stability and many more.

Answer:

Pressure of .2 m^3 of bricks:

Pb = ρ g H = 1.8 ρw * 9.80 m/s^2 * .20 m = 1800  * 9.8 * .2 = 3530 Pascals

ρb = 1.8 ρw = 1.8    since the density of bricks is 1.8 that of water

Pw = 1 * 9.8 * 1000 * .2 = 1960 Pascals

W = P * A   pressure * Area = Force

Pnet = 1570 Pascals - pressure due to bricks under water

F = 1570 N/m^2 * .2m^2 = 63 N     force on pile of bricks

Explanation:

the figure in the left side has higher frequency.

because it has more nos. of wave in 1sec.