What type of friction is it when two students are pushing a box that is at rest

Answer:

The energy conversion is:

C) Chemical - - - - > Thermal.

Answer:

the pilot should recourse back to the airport it og was in

Explanation:

mass of the potassium formed by the passage of 5.92 amps for 1.94 hours through an electrolytic cell that contains a molten potassium salt is 16.41g

Total amount of current in amps = 5.92 Columbus/ sec(I)

total time period = 1.94 h = 1.94 X 3600 sec = 6984 sec(t)

initially electric charge Q is calculated  Q =I X t =41,345.28 Columbus

now molar mass of K is 39.09g/mol and faradays constant = 96485 so by the formula , n=Q/F = 41,345.28/96485 =0.4285mol  now, m = nM where n is number of mol and M is molar mass of K  so 0.42 X 39.09=16.41g

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Porque um litro tem 1000 gramas. então 10 grama se convertido em litros torna-se 0,01 Litros.

Litro é uma unidade de medida de volume. O litro não é uma das unidades international standards, mas está listado como uma das "unidades não international aceitas para uso com o international standards". A unidade SI para volume é o metro cúbico (m³). 1 l = 1 dm = 1000 cm = 1000 cc 1 ml = 1 cm = 1 cc O símbolo do litro é uma letra minúscula ou maiúscula l, L. A letra minúscula l (ℓ) também é usada.

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Answer:

C. Newton's Third Law

Explanation:

Newton's Third Law states that for every action, there is an equal and opposite reaction. In this case, the ball rolling towards the wall is the action, and the wall's reaction is to stop the ball. The ball exerts a force on the wall, and the wall exerts an equal and opposite force on the ball, causing the ball to come to a stop.

It is safe to assume that each cart would experience a distinct force during each collision caused by the carts, and the force distribution would change depending on the aforementioned criteria.

During each individual collision, it is unlikely that the two carts received the same force during the collision. This is because the force of the collision depends on various factors such as the mass and velocity of the carts, the angle of collision, and the materials of the carts.

For instance, if one cart was heavier and moving faster than the other, it would exert more force during the collision. Additionally, the angle of collision can also affect the force received by each cart.

If the collision was head-on, the force would be distributed evenly between the carts. However, if the collision was at an angle, one cart would receive more force than the other.

The materials of the carts can also affect the force of the collision, as carts made of more rigid materials would receive more force than carts made of softer materials.

Overall, it is safe to say that each individual collision created by the carts would result in different forces being exerted on each cart, and the force distribution would vary depending on the aforementioned factors.

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Answer:

1 is summer, 2 is most likely winter,3 is most likely summer, and 4 is fall

Explanation:

Answer:

Does the brass make the water get hotter or does the water make the brass get colder?

The direction of the resultant acceleration is 17° North of West. The correct answer is D. The first step is to break down the forces into their horizontal and vertical components.

The eastward force from the ocean tide is purely horizontal, while the wind force has both horizontal and vertical components. To find the horizontal component, we use the cosine of the angle between the force and the horizontal axis:
1500 N * cos(45°) = 1060 N

To find the vertical component, we use the sine of the angle:
1500 N * sin(45°) = 1060 N

So the total horizontal force acting on the sailboat is:
4500 N + 1060 N = 5560 N

And the total vertical force is:
1060 N

To find the direction of the resultant acceleration, we can use trigonometry to find the angle that the acceleration vector makes with the horizontal axis. The tangent of this angle is equal to the vertical component of the acceleration divided by the horizontal component:
tan(θ) = 1060 N / 5560 N

θ = tan^-1(1060/5560) = 10.9°

Therefore, the direction of the resultant acceleration is 17° North of West. The correct answer is D.

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The wT305% 41 standard steel shape is commonly used in construction to support loads and provide structural stability. In this case, it is being used to support the loads shown on the beam in Figure P8.22a.

The dimensions from the top and bottom of the shape to the centroidal axis are important factors in determining the strength and stability of the beam. To calculate the maximum load capacity of the beam, the properties of the wT305% 41 shape must be considered. These properties include the moment of inertia, section modulus, and centroid location. By using these properties and the dimensions provided in the sketch, the maximum load capacity of the beam can be determined.

It is important to note that the wT305% 41 shape has a specific load capacity and should not be overloaded beyond its limits. Proper calculations and engineering design must be considered to ensure the safety and structural integrity of the beam.

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The complete question is:

FIGURE P8,21 P8.22 A wT305% 41 standard steel shape is used to support the loads shown on the beam in Figure P8.22a. The dimensions from the top and bottom of the shape to the centroidal axis are shown on the sketch of the cross-section (Figure P8.22b). Consider the entire 4.8 m length of the beam, and determine 50 kN/m 1.2 m 2.4m 1.2 m FIGURE P8.22a 88.9 mm 211.1 mm WT305 x 41 FIGURE P8.22b (a) the maximum tensile bending stress at any location along the beam and (b) the maximum compressive bending stress at any location along the beam.

Answer:

True.

Explanation:

Defenintion of Muscular Endurance:  

The ability of a muscle (or set of muscles) to perform a repeated action without tiring.

Answer:

El castigo de Juan fue justo y a la vez injusto.

Explanation:

Adjetivos opuestos: justo - injusto

La oración significa que el que castigo era merecido, sin embargo, puede ser algo exagerado por lo tanto algo injusto. Describiendo la situación con adjetivos con significado opuesto al mismo tiempo, mediante un conector de simultaneidad que es y a la vez.

Answer:

its the cheese

Explanation:

The step of this scientific method is "draw conclusion".

The scientific method is the process of objectively establishing facts through testing and experimentation.

The basic scientific process or scientific method involves the following;

Thus, if Kim’s experiment showed that chicken eggshells were stronger when she gave the hen feed, to which extra calcium had been added. The step of this scientific method is "draw conclusion".

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So the focal length of the concave mirror is: f = -4 cm.

We can use the mirror formula to find the focal length of the concave mirror:

1/f = 1/do + 1/di

Here f is the focal length, do is the object distance (distance between the object and the mirror), and di is the image distance (distance between the image and the mirror).

In this case, we have:

do = -12 cm (since the object is in front of the mirror)

di = -3.0 cm (since the image is in front of the mirror)

1/f = 1/-12 + 1/-3.0

Simplifying this expression gives us:

1/f = -1/4

Multiplying both sides by -4 gives us:

-4/f = 1

So the focal length of the concave mirror is:

f = -4 cm

Note that the negative sign indicates that the mirror is a concave mirror.

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Answer:

Explanation:

Total energy supplied is,

E = V*I*t

=12 V x 60 A.h (3600 s/ 1 h)

=2.592*10^6 J

Answer:

± .55 kg

Explanation:

55  * 1% = .55 kg

± .55 kg

Answer: NOT B) Electric potential energy is the charge divided by the electric potential difference.

Explanation:

just missed it on edg

Answer: Choice C

Explanation:

Answer:

8n

Explanation:

As the speed of wave decreases, the wavelength of the wave decreases.

We know that as a wave travels from one medium to another its speed decreases depending on if the first medium is less dense than the second medium or increases depending on if the first medium is more dense than the second medium. This is known as refraction

Now, we know that the speed of a wave v = fλ where

The ratio of the speed in medium one to speed in medium two is called the refractive index of medium 1 to 2.

From the diagram, we see that the wavelength in medium 1 is longer than that in medium 2. Since wavelength and speed are proportional, so the speed in medium 1 is also greater than the speed in medium 2.

So, As the speed of wave decreases, the wavelength of the wave decreases.

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Answer:

So we have a measure in grams, we can start with something like:

143.523 grams.

Now we want this measurement to be precise to the nearest tenth of a gram.

The nearest tenth of a gram is the first digit after the decimal point, then the digits that come after this are not useful, because they are outside our precision range.

Then we must write our measurement as:

143.5 grams

Where the digit that came after the 5 was a 2, so we rounded down.

The clearest example of a neuronal membrane's selective permeability is an option (b) - K+ ions can diffuse across the membrane more easily than Na+ ions. This is because the membrane is more permeable to K+ ions than to Na+ ions.

This is due to the presence of potassium ion channels, which allow K+ ions to easily cross the membrane. On the other hand, the presence of sodium ion channels is limited, which makes it more difficult for Na+ ions to cross the membrane.

The selective permeability of the neuronal membrane is crucial for maintaining the proper functioning of the nervous system. It allows for the regulation of ion concentrations inside and outside the cell, which is essential for generating and transmitting electrical signals. This selective permeability is achieved through the presence of ion channels and transporters that selectively allow certain ions to pass through the membrane.

In summary, the clearest example of a neuronal membrane's selective permeability is the fact that K+ ions can diffuse across the membrane more easily than Na+ ions, due to the presence of potassium ion channels and the limited presence of sodium ion channels. Hence, b is the correct option.

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When the eye is slightly moved in any direction after concentrating, the crosshairs should appear to pass over the item observed. If they don't, parallax is present.

If accurate work is to be done, this effect must be removed by refocusing the objective lens, the eyepiece, or both.

The apparent displacement or difference in the apparent direction of an object as observed from two different positions other than those directly across from the object is known as parallax. the angle between two locations on the earth's orbit where a celestial body's orientation is measured.

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A) The required angular speed in rad/s is calculated to be 30.35 rad/s.

B) The required tangential speed is calculated to be 0.922 m/s.

C) The radial acceleration of a point on the rim is calculated to be 28 m/s².

D) The required total distance a point on the rim moves in 2.10 s is calculated to be 1.93 m.

The radius of the disk is given as r = 8.04 cm = 0.0804 m

Speed of the disk is given as 290 rev/min

A) To get the angular speed in rad/s is quite easy since we already have it in rpm. Let us convert from rpm to rad/s

ω rad/s = 290 rpm × 2π rad/rev × 1/60 min/s

ω rad/s = 1821.2 / 60

ω rad/s = 30.35 rad/s

B) Tangential speed at a point, 3.04 cm (0.0304 m) from the centre

Tangential speed is usually gotten from angular speed as,

v = ω r = 30.35 × 0.0304 = 0.922 m/s

C) Radial acceleration of a point on the rim can also be expressed in terms of angular speed as,

a(r) = ω²r = 30.35² × 0.0304 = 28 m/s² directed towards the centre

D) The total distance at a point on the rim is calculated as,

The rim moves in 2.1 s,

d = ω r t = 30.35 × 0.0304 × 2.1 = 1.93 m

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Given data:

* The distance covered in the given case is 150 meters.

* The time taken to cover the distance is 18 seconds.

Solution:

In the case of uniform motion of the body, the average speed of the body is the ratio of distance traveled and time taken by the body.

Thus, the average speed of the given person is,

Thus, the average speed in m/s is 8.33 m/s.

Answer: (C) +1

Explanation:

Neutrons have no charge, so we can ignore them in this problem. Protons have a 1+ charge, and electrons have a 1- charge. So, the total charge is 10(+1) + 9(-1) = +1.

Moon will be seen next to that same star in 27.3 days. It is the time required for the Moon to orbit around the Earth.

The Moon is a natural satellite that needs approximately 27.3 days to complete a full orbit around the Earth planet.

Moreover, the Earth's planet needs approximately 365 days to reach a full orbit around its star, the Sun.

In consequence, both the Earth planet and its natural satellite (Moon) orbit around the Sun.

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Answer:

65 miles/hr

Explanation:

v0 + a • t = vf

v0 = initial velocity = 50 miles/hr

a = acceleration = 15 miles/hr/hr

t = time displaced = 1 hr

vf = final velocity

50 miles/hr + (15 miles/hr/hr • 1 hr) = final velocity

65 miles/hr = final velocity

Answer:

What following?

Explanation: