A kid rides a scooter down the sidewalk with an constant speed of 3.0 m/s for 7.0 seconds, then uniformly increases speed to 9.0 m/s in 5.0 seconds. What is the kid's total displacement? (How far along the sidewalk did the kid travel?)

Answer:

2 moles

Explanation:

please mark me as brainlest

The mass of one mole of iron sulphide is 88 g. Then the number of moles in 44 g is 0.5 moles.

One mole of a substance is its amount which contains 6.022 × 10²³ atoms. This number is called Avogadro number. One mole of every element contains Avogadro number of atoms.

Similarly one mole of every compound contains Avogadro number of molecules. The mass of one mole of a compound is called its molar mass.

Atomic mass of  Fe = 56 g/mol

atomic mass o S = 32 g/mol

molar  mass of FeS = 56 + 32 = 88 g/mol

Mass of one mole of iron sulphide (FeS) is 88 g. Hence number of moles in 44 g is :

no.of moles = given weight/molar mass

                    = 44 g /88 g/mol = 0.5 mol

Therefore, the number of moles of FeS in 44 g is 0.5.

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Answer:

5kg

Explanation:

p = mv

m = p/v

m = 35/7

m = 5kg

Answer:

5 kilograms

Explanation:

Mass can be found using the following formula.

\(m=\frac{p}{v}\)

where p is the momentum and v is the velocity.

The object has a momentum of 35 kg m/s and a velocity of 7 m/s. Therefore,

p= 35 kg m/s

v= 7 m/s

Substitute these values into the formula.

\(m= \frac{35 kg- m/s}{ 7 m/s}\)

Divide 35 kg m/s  by 7 m/s. (35/7=5)

The m/s in the numerator and denominator cancel each other out.

\(m= 5 kg\)

The mass of the object is 5 kilograms.

When a spacecraft operates outside the Earth's atmosphere without its main sources of fuel, it relies on other propulsion systems that do not require atmospheric oxygen or combustion. One of the most common propulsion systems used in space is rocket propulsion. Rockets operate based on the principle of action and reaction, following Newton's third law of motion. They expel high-velocity exhaust gases in one direction, which generates an equal and opposite force that propels the spacecraft forward.

In space, where there is no air or atmosphere, rockets can use different types of propellants, such as liquid or solid fuels, which can be stored onboard the spacecraft. These fuels undergo a chemical reaction, resulting in the expulsion of hot gases. The expelled gases create a thrust force that propels the spacecraft in the opposite direction.

To control the spacecraft's movement and direction, it uses small thrusters or engines that can be fired in different combinations. By firing these thrusters, the spacecraft can change its trajectory, adjust its orbit, or perform maneuvers in space.

Additionally, spacecraft can harness other sources of energy for various operations. Solar panels are often used to generate electrical power from sunlight. This power is then used for onboard systems, such as communication, navigation, scientific instruments, and life support systems.

In summary, when a spacecraft operates outside the Earth's atmosphere without its main sources of fuel, it relies on rocket propulsion and other systems to maneuver and perform its intended tasks in space.

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Answer:

The correct option is;

C

Explanation:

The given information is that a clay ball is dropped from a certain height.

Therefore, the clay ball has an initial potential energy and zero kinetic energy

Which gives that the initial velocity of the clay ball = 0

As the potential energy is converted into kinetic energy, the velocity of the clay ball increases

However, if the direction of measurement of the velocity is opposite to the direction in which the clay ball is falling, the velocity of the ball progressively increases negatively as shown in option C

The question addresses the stability of the atmosphere and the factors that determine convective stability or instability. It also explains the difference between the adiabatic lapse rate of dry air and wet saturated air.

a) The stability of the atmosphere is determined by the temperature profile and relative densities of the air cell and atmosphere. If the temperature of the surrounding atmosphere decreases with altitude at a rate greater than the adiabatic lapse rate of the air cell, the atmosphere is considered convectively stable.

In this case, the air cell will return to its original position. Conversely, if the temperature of the surrounding atmosphere decreases slower than the adiabatic lapse rate of the air cell, the atmosphere is convectively unstable. The air cell will continue moving in the same direction.

b) The adiabatic lapse rate refers to the rate at which temperature decreases with altitude for a parcel of air lifted or descending adiabatically (without exchanging heat with its surroundings). The adiabatic lapse rate of dry air is higher (around \(9.8^0C\) per kilometer) compared to the adiabatic lapse rate of wet saturated air (around 5°C per kilometer).

This difference arises because when water vapor condenses during the ascent of saturated air, latent heat is released, reducing the rate of temperature decrease. A diagram can illustrate the difference between the two lapse rates, showcasing their respective slopes.

c) When wet unsaturated air rises from the ocean surface, its temperature decreases at a rate equal to the dry adiabatic lapse rate. However, if the ambient lapse rate (temperature decrease with altitude) is higher than the adiabatic lapse rate for dry air, a temperature inversion layer forms at higher altitudes.

In this inversion layer, the temperature increases with altitude instead of decreasing. A schematic diagram can depict the temperature changes of the wet air in comparison to the ambient temperature, showing the inversion layer.

Cumulus clouds form at the altitude where the rising moist air reaches the level of the temperature inversion layer. These clouds are formed due to the condensation of water vapor as the air parcel cools to its dew point temperature.

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Answer:

Explanation:For second hand, period = 1 min = 3660 s; frequency = 0.0166 Hz}\\\mbox{For minute hand, period = 1 hr = 3600 s; frequency = 2.77}\times10^{-4} Hz\\\mbox{For hour hand, period = 12 hrs = 4300 s; frequency = 2.3}\times10^{-5} Hz.

Answer:

  27

Explanation:

It moves 13 meters in the first two seconds, backtracks 9 meters in the next 4 seconds, then moves forward 5 meters in the last 4 seconds. The total distance traveled is ...

  13 m + 9 m + 5 m = 27 m

_____

In the first interval, the object moves from 1 m to 14 m away from the position reference, hence a move of 13 meters.

Answer:

transmission

Explanation:

Answer:

209.3 m

Explanation:

x component will be  253 cos 55.8

y component will be  253 sin 55.8 = 209.3 m

Answer:

The difference lies in the planets' respective magnetic fields, because while Earth's magnetism comes from within, Mars' does not. Earth's magnetism comes from its core, where molten, electrically conducting iron flows beneath the crust. Its magnetic field is global, meaning it surrounds the entire planet

Explanation:

thanks for question

The tension in the support cable at low tide can be determined by analyzing the statics problem.

Tension is a force that acts along the length of a rope, string, or similar object when it is pulled tight. It is typically measured in newtons and is an important concept in the study of mechanics. Tension is the same regardless of the direction in which it is applied, making it a scalar quantity. It is also the opposite of compression, which is a force that acts to reduce the length of an object. Tension plays a major role in how objects interact with each other in the physical world.



To do this, we must consider a moment equation in order to determine the length of the buoy that is submerged. For this we can treat the buoy as a line (with negligible diameter, except for the evaluation of its volume and weight) and assume the support cable is vertically oriented.

Assuming the support cable has a negligible weight, the vertical component of the tension in the support cable can be found by setting up a static equilibrium equation in the vertical direction. This equation can be written as:

Fn = Wb + Ww

Where Fn is the tension in the support cable, Wb is the weight of the buoy, and Ww is the weight of the water displaced by the submerged portion of the buoy.

To determine Wb, we need to calculate the volume of the buoy, which can be calculated using the submerged length of the buoy. This can then be multiplied by the density of the buoy material to determine the weight of the buoy. To determine the weight of the water displaced by the submerged portion of the buoy, we need to calculate the volume of the submerged portion, which can be calculated using the submerged length of the buoy. This can then be multiplied by the density of water to determine the weight of the water displaced.

By setting up the static equilibrium equation and including the weights of the buoy and water displaced by the submerged portion of the buoy, we can calculate the tension in the support cable at low tide.

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Answer:

La presión ejercida sobre el suelo mientras el niño está parado en un pie es 33127,874 pascales.

Explanation:

Después de una rápida investigación por internet, concluimos que este enunciado está incompleto. La versión completa se describe a continuación:

En la imagen se observan los pies de tres niños que caminan en zancos hechos de tarros con arena en el interior. El radio del tarro es de 0,07 metros. Si la masa del niño es de 50 kilogramos y la de cada uno de sus zancos es de un kilogramo, ¿cuál es la presión que se ejerce sobre el suelo cuando el niño está parado en un pie? (Nota: No se ha podido encontrar la citada imagen)

El enunciado hace referencia a aquel juego infantil de poner cada uno de los pies sobre un zanco hecho de una lata metálica. Ambos zancos están unidos mediante una cuerda accionada por las manos y brazos. En este caso, uno de los niños mantiene el equilibrio sobre uno de sus pies. La fuerza generadora de la presión ejercida sobre el suelo es el peso conjunto del niño y los zancos.

Asumiendo que la fuerza se distribuye uniformemente sobre la superficie inferior del zanco, el cual tiene forma de cilindro recto, la presión ejercida sobre el suelo (\(p\)), en pascales, queda descrita por la siguiente fórmula:

\(p = \frac{W}{A}\) (1)

\(p = \frac{(m_{N}+2\cdot m_{Z})\cdot g}{\pi\cdot r^{2} }\) (1b)

Donde:

\(m_{N}\) - Masa del niño, en kilogramos.

\(m_{Z}\) - Masa del zanco, en kilogramos.

\(g\) - Aceleración gravitacional, en metros por segundo al cuadrado.

\(r\) - Radio del tarro, en metros.

Si sabemos que \(m_{N} = 50\,kg\), \(m_{Z} = 1\,kg\), \(g = 9,807\,\frac{m}{s^{2}}\) and \(r = 0,07\,m\), entonces la presión ejercida sobre el suelo mientras el niño está parado en un pie es:

\(p = \frac{(50\,kg + 2\,kg)\cdot \left(9,807\,\frac{m}{s^{2}} \right)}{\pi \cdot (0,07\,m)^{2}}\)

\(p = 33127,874\,Pa\)

La presión ejercida sobre el suelo mientras el niño está parado en un pie es 33127,874 pascales.

Whenever the brakes are applied fully, a vehicle going at 50 mph experiences a steady deceleration rate 42 ft/s2, covering 64.05 feet before coming to a halt.

Use the formula d = st, or length equals speed times time, to find the distance. Since both represent a certain amount of distance per unit of time, such as miles an hour or kilometers an hour, rate and speed are comparable.

Initial speed is u=50 mi/h=50×1.467=73.35ft/s.

Vehicle deceleration is, a=-42ft/s²

Use of both the second kinematics equation for motion is as follows:

v²=u²+2as

Here, s denotes the traveled distance, while v is the ultimate speed. Since the automobile eventually stops, v = 0.

0²=73.35²+2(-42)×s

84=73.35²

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The electric field lines in sites far from the region between electric charges are analogous to the magnetic fields in locations far from the dipole.

A magnetic moment, also referred to as a dipole moments, is a measure of an object's tendency to align with a magnetic field. The "Magnetic Moment" is the magnetically pull and orientation of an electromagnetic or other object that produces a magnetic field. The magnetic moment is a type of vector quantity.

The dipolar moment, which would be defined as the product of the torque a material receives in a magnetic field, is used to determine the distribution of both negative and charges in a system.

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Answer:

c glass

Explanation:

beacause glass is transparent and it would be easier to for refraction

Answer:

P = VI = (IR)I = I2R

Explanation:

What the equation means is that if you double the current you end up with 4 times the power loss. It's like the area of carpet you need for a room - if you make the room twice as long and twice as wide you need 4x as much carpet. The physical explanation is that the voltage difference along a wire depends on the current - more current flowing with a resistance means more voltage (pressure of electricity if you like) is built up.

This extra voltage means more power. So if you double the current your would double the power, but you also double the voltage which doubles the power again = 4x as much power. P = VI = (IR)I = I2R

I hope this helps you out, if I'm wrong, just tell me.

As I mentioned earlier, Ohm's law gives us the formula P = IV, where V is the voltage ( also known as the electrical potential difference ) and I is the current. It is confusing that P = I²R and P = IV are one in the same - so I want to go a bit deeper on that.

We have three formulas, P = IV, P = I²R, and P = V² / R. Each are considered the same. The two formulas P = I²R, and P = V² / R are derived from the statement that P = IV, under the condition V = IR. Substitute the value of V from this second condition V = IR into P = IV. You would get the following -

P = I( IR ),

P = I²R

That is how one can derive the formula P = I²R, and how P = IV and P = I²R are thought to be one in the same. If you would like, take a look at how to get the formula " P = V² / R, "

V = IR, P = IV

I = V / R, P = IV

P = ( V / R )V,

P = V² / R

Hope that helps!

The response to the questions are given below:

1a. The condition for the equilibrium of a rigid body acted upon by parallel forces is that the vector sum of all the forces acting on the body must be equal to zero, and the vector sum of all the torques (moments) acting on the body must also be equal to zero.

1bi. An experiment to determine the mass of a meter rule using the principles of moments could involve suspending the meter rule from a pivot point using a string or wire, and then applying known weights to the ends of the meter rule.

1bii. Two precautions that should be taken to ensure accurate results in this experiment would be to ensure that the pivot point is perfectly level and that the weights applied to the ends of the meter rule are applied at exactly the same distance from the pivot point.

C. A couple in physics is a pair of forces that act on a body in such a way that they produce a turning effect, or torque, about a fixed point. A couple consists of two equal and opposite forces that are applied to the body at different points.

When a rigid body's linear momentum or rotational momentum are not changing at any given time, it is said to be in mechanical equilibrium. The body is in a state of mechanical equilibrium when there is no linear or angular acceleration.

When a rigid body's linear and angular acceleration are both zero with respect to an inertial frame of reference, we say that it is in equilibrium. A body in equilibrium can therefore move, but in that case, its linear and angular velocities must remain constant.

Therefore, In essence, there should not be any acceleration for an object to be in equilibrium (linear or angular). Therefore, the item must have zero net force and zero net torque.

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The quantity of heat required is 1229.1 J

The specific heat capacity of a substance is the quantity of heat required to increase the temperature of a unit mass of the substance by 1°C or 1k. it measure in J/kg/k.

The specific heat capacity of a substance is denoted by 'C'. And it is expressed as C = Q/m∆t

where ∆t is the change in temperature, Q is the quantity of heat energy required and m is the mass of the substance.

therefore Q=mCΔt

Q= 96.7× 0.874×(69.2-31.7)

Q= 1229.1J

Thereore the heat required to increase the temperature from 31.7°C to 69.2°C is 1229.1J

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Answer:

2 m/s

Explanation:

Just divide the distance and time. 4/2= 2 m/s

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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Answer:

Similitudes y diferencias entre los músculos de los peces y los de los animales terrestres.

Explicación:

Los músculos de los peces se diferencian del músculo de los animales terrestres porque los peces tienen músculos rojos, rosados y blancos. También tienen tejido muscular de pescado que se compone de músculo estriado al igual que el músculo de los animales terrestres. La mayor parte del tejido muscular de los peces es de color blanco, pero muchos peces también tienen una cierta cantidad de tejido oscuro de color marrón o rojizo. El músculo oscuro se encuentra justo debajo de la piel a lo largo del costado del cuerpo.

The index of refraction of air, which is approximately 1.000: n_(2) = (1.000 × sin(45.0°)) / sin(17.0°). This expression will give us the index of refraction of the diamond.

To calculate the index of refraction of the diamond, we can use Snell's law, which relates the angles of incidence and refraction to the indices of refraction of the two media involved. Snell's law can be expressed as follows:

n1 × sin(θ_(1)) = n2 × sin(θ_(2))

where:

n_(1) is the index of refraction of the initial medium (in this case, air),

θ_(1) is the angle of incidence,

n_(2) is the index of refraction of the second medium (in this case, diamond),

θ_(2) is the angle of refraction.

We can rearrange the equation to solve for the index of refraction of the diamond, n_(2):

n_(2) = (n_(1) × sin(θ_(1))) / sin(θ_(2))

Given that the angle of incidence θ_(1) is 45.0° and the angle of refraction θ_(2) is 17.0°, we can substitute these values into the equation along with the index of refraction of air, which is approximately 1.000:

n_(2) = (1.000 × sin(45.0°)) / sin(17.0°)

This expression will give us the index of refraction of the diamond.

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Answer:

A DAY IN THE LIFE OF METIS JOURNAL, I WROTE IT HOPE U LIKE IT ;))) XD

We, who live in the west, were Nomadic. So we always moved from place to place to hunt buffalo and other fur-bearing animals. And now again we have to shift everything we collected , like, all the essential needs we collected. It’s really hard to shift stuff, But when you move to a new place you get to see new beautiful places. They are just so satisfying to see! It’s like all my work(like the shifting work) is paid off. I love it! We always meet the Hudson’s bay company employees, and give them furs which we took from the bissons and other furry animals we hunted. And in exchange they give us their (Hudson’s Bay company) goods. Which is good! Because then we or I won't be able to enjoy that delicious pemmican!

 The one reason that makes me proud of my parents is that because of them I am like a translator for both sides in the fur trade! Anyways coming back to the present. As I said before, we were moving today to another place, But on the way some people along with my father will ride the famous York boats carrying supplies to fur posts. I begged my father to take me with him! And as usual he gave me some silly reason for me to stay. And now since I don’t have anything to do I will-..Nevermind, My mom’s calling me. Okay after helping my mom keep the fur posts into the York boats me , my mom, and the others are just relaxing and enjoying nature just to take a break. Since, I am so obsessed with my Journal notebook today I’m just going to sit here and right what comes to my mind. I’m not like the others who always seem to be talking with someone. I like my own space! 

I kind of miss my dad already, but he and his fellow members need to travel the waterways from the red river further west and north to hudson bay. These red river carts also travel the trek back and forth over land to St. Paul, Minnesota and to posts in saskatchewan.  Speaking about the red river, the only large settlement in the region is the red colony. About 12000 people lived in this colony around Fort Garry. Some were the original Selkirk settlers or their descendents. They had come from Scotland with lord Selkirk when he established the colony in 1811. Many of these original settlers were poor farmers who had been displaced  from their lands in scotland. They had endured many hardships in the early years of settlement, including foods, hunger, and sickness. I love studying about other colonies, cultures , history etc.

Explanation:

write this as your answer you will get extra marks

Answer:

False

Explanation:

Answer:

Applied Force.

Gravitational Force.

Normal Force.

Frictional Force.

Air Resistance Force.

Tension Force.

Spring Force.

Explanation:

:)

Answer:

No. When the distance is doubled, the gravitational force is 1/4 times as strong, therefore, the correct answer is she is not correct

Explanation:

The gravitational force is given as follows;

\(F} =G \times \dfrac{m_{1} \times m_{2}}{r^{2}}\)

Where;

m₁, and m₂ are the masses sharing the gravitational field

G = The universal gravitational constant

r = The distance between the centers of the two masses

Therefore, when the new distance, R = 2 × r, we get;

\(F} =G \times \dfrac{m_{1} \times m_{2}}{R^{2}} = G \times \dfrac{m_{1} \times m_{2}}{(2 \times r)^{2}} = G \times \dfrac{m_{1} \times m_{2}}{4 \times r^{2}} = \dfrac{1}{4} \times G \times \dfrac{m_{1} \times m_{2}}{r^{2}}\)

Therefore, when the distance is doubled, the gravitational force is one fourth as strong, therefore, she is not correct.

Answer: You need your bachelor's to become a nurse at an entry level.

Explanation: Most nurses enter nursing knowing they will eventually earn their baccalaureate degree. While it’s possible to obtain an Associate Degree in Nursing (ADN), capped by earning one’s RN license by taking and passing the standardized NCLEX-RN exam, many nurses choose to further their education—and career prospects—by obtaining their baccalaureate degree. Requirements vary by state, but at the very least, the path to RN usually involves earning an Associate Degree in Nursing (ADN), qualifying a candidate to take the standardized national licensure examination known as NCLEX-RN. Only after taking this exam and passing may a nurse work as an RN. This is true of all states and the District of Columbia. Some localities may also have additional requirements.

RN - Registered Nurse

Hope this helps

:)

Answer:

1.2 A

Explanation:

From the diagram attached, The three resistors are parallel because the each ends of the resistors are connected together. Since they are in parallel, the voltage across each resistor is the same. The voltage source connected in parallel to the resistors is 60 V. Therefore the voltage across the 50 Ω resistor is 60 V. Using ohm law:

Voltage (V) = Current (I) × Resistance (R)

V = IR

I = V/R

I = 60 V/ 50 Ω

I = 1.2 A

The current in the 50 Ω resistor is 1.2 A

Answer:

Image 4 ?

Explanation:

Answer:

Image 4

Explanation:

Took Test