Pls help. Pure substance vs Mixture

Explanation:

The height of the rise of liquid with capillary tube is given by the formula as follows :

[tex]h=\dfrac{2S\cos\theta}{r\rho g}[/tex]

Where

r is radius

It is clear that the height of the rise of liquid is inversely proportional to the radius of the capillary tube.

If the radius of the capillary tube is doubled, it means the height of rise of liquid with capillary tube become half.

Answer:

Explanation:

The charged particle will experience a force towards one of the plates , in direction perpendicular to its initial velocity because electric field is between the plates .

The force experienced by it = q E

acceleration a  = qE / m , where m is mass of the charged particle .

The particle will have two velocity at the time it leaves the space between plates .

Horizontal velocity = initial horizontal velocity = v .

vertical velocity is created by force qE

Time taken by horizontal velocity to cover distance L

t = L / v

vertical velocity attained V = u + at

0 + at  ( time taken by vertical velocity and time taken by horizontal velocity are equal )

vertical velocity = (qE/ m) x (L/v) = qEL / mv

Resultant velocity = [tex]\sqrt{(\frac{v}{1} )^2+(\frac{qEL}{mv})^2 }[/tex]

= [tex]\sqrt{(v^2+(\frac{qEL}{mv})^2 }[/tex]

This gives the magnitude of resultant velocity .

Answer:

It's D!

Explanation:

The two most common isotopes of tin have atomic masses of 118 and 120 and have the key difference that the heavier isotope has 2 more neutrons than the lighter one.

Tin is the element that has the largest number of stable isotopes, only out of the ten are potentially radioactive but have not been observed to decay.

We know that Tin 118 and Tin 120 are the isotopes of the tin, but the key difference between them is that the Tin 120 has two more neutrons than Tin118, therefore, the isotopic mass of the two is different as well.

Mass of Tin118 < Mass of Tin120

Therefore, from all the provided options the correct option is that the heavier isotope has two more neutrons than the lighter isotope.

Hence, the correct option is d.

Learn more about Isotopes:

https://brainly.com/question/13214440

Answer:

Kepler's first law of planetary motion states that planets orbit the Sun in elliptical orbits, with the Sun located at one focus (option b)

Explanation:

Kepler's laws or laws of planetary motion are scientific laws that describe the movement of the planets around the Sun. The fundamental contribution of Kepler's laws was to show that the orbits of the planets are elliptical and not circular as was previously believed.

Kepler's laws are kinetic laws. This means that its function is to describe the planetary motion.

Kepler formulated three laws:

An ellipse is a closed curve that has two symmetrical axes, called foci or fixed points. In simpler words, an ellipse can be described as a flattened circle.

The degree of flattening of a closed curve is called eccentricity. When the eccentricity is equal to 0, the curve forms a perfect circle. On the other hand, when the eccentricity is greater than 0, the sides of the curve are flattened to form an ellipse.

Kepler's first law of planetary motion states that planets orbit the Sun in elliptical orbits, with the Sun located at one focus (option b)

Answer:

Summary: Nutrition and exercise are critical for improving body composition. Keeping your calories, fiber and protein in check is a good first step. All exercise can help with fat loss, but weight training is the best way to increase muscle mass.

Explanation:

Answer: TRUE

Explanation:

Answer:

yes he is true I too believe weight only the mass never changes.

Answer: 90 m/s

Explanation:

Given

mass of racecar [tex]M=1.2\times10^3\ kg[/tex]

velocity of racecar [tex]u=8\ m/s[/tex]

mass of still honeybadger [tex]m=80\ kg[/tex]

after collision race car is traveling at a speed of [tex]v_1=2\ m/s[/tex]

conserving linear momentum

[tex]Mu+m\times0=Mv_1+ mv_2\quad[v_2=\text{velocity of honeybadger after colllision}][/tex]

[tex]1.2\times10^3\times8+0=1.2\times10^3\times2+80\times v_2[/tex]

[tex]1.2\times10^3(8-2)=80v_2\\v_2=\frac{7.2\times10^3}{80}=90\ m/s[/tex]

Answer:

Speed = 360m/s

Explanation:

Given the following data;

Wavelength = 18cm to meters = 18/100 = 0.18m

Frequency = 2000Hz

To find the speed;

Speed = frequency * wavelength

Speed = 2000 * 0.18

Speed = 360m/s

Therefore, the speed of the wave is 360 meters per seconds.

Answer:

b. The normal force between the molecules of the paper is overcome by the contact force of the hands.

Explanation:

The paper molecules are held together by a weak bond. When the student holds the paper on both sides with the center of the paper in between, the student applies two equal forces in the opposite direction of the paper making the paper molecules weaken and separate.

Answer:

The electrostatic forces from the contact of the hands with the paper causes the paper molecules to separate.

Here's the rest of the answers

1.) Which statement is correct about the strength of forces?

Electrostatic forces are trillions of times stronger than gravitational forces.

2.) A student tries to push a book across a table. Which forces acting on the book are a result of electrostatic forces?

normal force and friction

3.) What type of force can explain how a gecko climbs up a wall?

contact forces

5.) A heavy hammer is sitting on top of a board. Which statement correctly describes why the hammer does not go through the board?

The electrostatic forces between the molecules of the board prevent the force of gravity from breaking the board apart.

Explanation:

Understanding that stars are naturally quite hot, imagine I pulled a piece of hot iron from a furnace. It would glow a bright red, and then slowly fade to black as the iron cools.

White dwarfs glow for the same reason - they are HOT!

Answer:

110.7Joules

Explanation:

Work is said to be done when the force applied to a body cause the body to move through a distance. Mathematically:

Work done = Force * Distance

Given the following

Force = 270 -0  = 270N

Distance moved = 0.410m

Required

The work done

Substitute the given parameters into the formula

Workdone = 270 * 0.41

Workdone = 110.7Joules

Hence the work done in pulling the bow is 110.7Joules

Answer:

F = 1.185 x 10⁻¹⁰ N

Explanation:

The force of gravitation between two objects is given by Newton's Law of Gravitation. According to this law:

[tex]F = \frac{Gm_{1}m_{2}}{r^{2}}\\[/tex]

where,

F = Gravitational Force between satellites = ?

G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ Nm²/kg²

m₁ = m₂ = mass of each satellite = 2000 kg

r = distance between both satellites = 1500 m

Therefore,

[tex]F = \frac{(6.67\ x\ 10^{-11}\ Nm^{2}/kg^{2})(2000\ kg)(2000\ kg)}{(1500\ m)^{2}}\\\\[/tex]

F = 1.185 x 10⁻¹⁰ N

Answer:

3.56m due south

Explanation:

Given parameters:

Velocity of the car  = 32m/s

Time  = 9s

Unknown:

Displacement of the car  = ?

Solution:

The velocity of a body is its displacement per unit of time in a specific direction.

  Velocity  = [tex]\frac{displacement}{time}[/tex]  

 So;

  Velocity  = [tex]\frac{32}{9}[/tex]  = 3.56m due south

Answer:

the order of arrival is from highest to lowest

star other side of Andromeda> star near side of andromeda> other side of milky way   > center of the milky way> nevulosa orion> Pluto> Sum

Explanation:

The light that comes from stars and galaxies travels in a vacuum so its speed is constant and with a value of c = 3 108 m / s, so time will be directly proportional to the distance to the object

             x = c t

the order of arrival is from highest to lowest

star other side of Andromeda> star near side of andromeda> other side of milky way   > center of the milky way> nevulosa orion> Pluto> Sum

Answer:

yeah

Explanation:

That is correct!

very good!

Answer:

x=0.12 m

Explanation:

Use the equation F=kx and isolate x because that's what you're solving for (x=F/k). Plug in your given values for F and k and solve for x [x=(2.3 N)/(19 N/m)] and you get x=0.12 m.

Answer:

Speed of Agnes during her journey was 0.848c

Explanation:

Given that;

Age of Agnes t₀ = 20 years

distance d = 2 × distance of star from Earth = 2 × 16 light-years

= 32 light-years

so get her speed speed; we use the following expression

Yvt₀ = d

( v / √(1 - ([tex]\frac{v}{c}[/tex])²) )² = ( 32 light-years / 20 yrs )²

v² / (1 - ( v²/c²)) = ( 32 × c  / 20 )²

v² / (1 - ( v²/c²)) = 2.56 × c²  

v² / c²-v²/c² = 2.56 × c²  

v²c²  / c² - v²  = 2.56 × c²  

v²  / c² - v²  = 2.56

v²  = 2.56 (c² - v²)

v²  = 2.56 (c² - v²)

v²  = 2.56c² - 2.56v²

v² + 2.56v² = 2.56c²

3.56v² = 2.56c²

v² = (2.56/3.56)c²

v = √((2.56/3.56)c²)

so v = 0.848c

Therefore, Speed of Agnes during her journey was 0.848c

Answer:

Electroscope is a device which is used to test if an object is carrying charge or not. It consists of 2 metal leaves which are connected to a metal rod which in turn is connected to a disc.

Answer:

how will climate change affect the strength of hurricanes in the future?

Answer:

a = Δv/Δt

Explanation:

The little triangle stands for change and t=time and v=velocity

Answer:



a = [tex]\frac{v-u}{t}[/tex]

Answer:

proton  nuetron electron

Answer:

    [tex]v_b[/tex] = 17.98 m / s

Explanation:

To solve this exercise we will use the kinematics relations in one dimension, let's start by looking for the acceleration between points A and C

         v = v₀ + a t

         a = [tex]\frac{v - v_o}{t}[/tex]

         a = [tex]\frac{19 - 14}{3.50}[/tex]

         a = 1.43 m / s²

this acceleration is uniform throughout the path.

Let's find the velocity at point B

          [tex]v_c = v_b + a t[/tex]

          [tex]v_b = v_c - a t[/tex]

let's calculate

          [tex]v_b[/tex] = 19 - 1.43 1.40

          [tex]v_b[/tex] = 17.98 m / s

Answer:

0m

Explanation:

The displacement of a runner when he completes one lap round track in 100s is 0m.

Displacement is the distance covered in a specific direction. This quantity is referred to as a vector because it has both magnitude and direction.

Answer:

Guysi hate math answer this guy plsss ssss

Answer:

Force have both magnitude and direction since its considered to be a scalar quantity

Explanation:

____________

Answer:

Therefore, the correct option is c: 0.

Explanation:

We can find the speed of the combined object by conservation of linear momentum:

[tex] p_{i} = p_{f} [/tex]

[tex] m_{1}v_{1_{i}} + m_{2}v_{2_{i}} = m_{1}v_{1_{f}} + m_{2}v_{2_{f}} [/tex]

Where:

"i" is for initial and "f" is for final

m₁: is the mass of the first object = m

m₂: is the mass of the second object = 3m

v₁: is the velocity of the first object

v₂: is the velocity of the second object

[tex] mv - 3m\frac{v}{3} = (m + 3m)v_{f} [/tex]

[tex] mv - mv = 4mv_{f} [/tex]

[tex] v_{f} = 0 [/tex]

Therefore, the correct option is c: 0.

I hope it helps you!                          

Answer:

Part-1: a)

Part-2: b)

Explanation:

Part-1

Part-2

Answer:

So increasing the voltage increases the charge in direct proportion to the voltage. If the voltage exceeds the capacitors rated voltage, the capacitor may fail due to breakdown of the dielectric between the two plates that make up the capacitor.

Explanation:

A option.

Answer:

a) The velocity of the rock during ascent at 180 meters above the surface is approximately 17.799 meters per second.

b) The height of the rock from the ground is 219 meters from the ground.

Explanation:

a) The rock experiments a free fall, in which this element is projected upwards, decelerated until rest is reached and then it falls down. Please notice that free fall is a case of uniformly accelerated motion, in which object is accelerated by gravity. The velocity of the rock is described by the following kinematic equation:

[tex]v = \sqrt{v_{o}^{2}+2\cdot a\cdot \Delta s}[/tex] (1)

Where:

[tex]v_{o}[/tex] - Initial velocity, measured in meters per second.

[tex]v[/tex] - Final velocity, measured in meters per second.

[tex]a[/tex] - Gravitational acceleration, measured in meters per square second.

[tex]\Delta s[/tex] - Travelled distance, measured in meters.

If we know that [tex]v_{o} = 30\,\frac{m}{s}[/tex], [tex]a = -1.62\,\frac{m}{s^{2}}[/tex] and [tex]\Delta s = 180\,m[/tex], then the velocity during ascent at 180 meters is:

[tex]v =\sqrt{\left(30\,\frac{m}{s} \right)^{2}+2\cdot \left(-1.62\,\frac{m}{s^{2}}\right)\cdot (180\,m) }[/tex]

[tex]v \approx 17.799\,\frac{m}{s}[/tex]

The velocity of the rock during ascent at 180 meters above the surface is approximately 17.799 meters per second.

b) The height of the rock is calculated from this kinematic formula:

[tex]s = s_{o}+v_{o}\cdot t +\frac{1}{2}\cdot a \cdot t^{2}[/tex] (2)

Where:

[tex]s_{o}[/tex] - Initial position of the rock, measured in meters.

[tex]s[/tex] - Final position of the rock, measured in meters.

[tex]v_{o}[/tex] - Initial velocity of the rock, measured in meters per second.

[tex]t[/tex] - Time, measured in seconds.

[tex]a[/tex] - Acceleration, measured in meters per square second.

If we know that [tex]s_{o} = 0\,m[/tex], [tex]v_{o} = 30\,\frac{m}{s}[/tex], [tex]t = 10\,s[/tex] and [tex]a = -1.62\,\frac{m}{s^{2}}[/tex], then the height of the rock from the ground is:

[tex]s = 0\,m + \left(30\,\frac{m}{s} \right)\cdot (10\,s)+\frac{1}{2}\cdot \left(-1.62\,\frac{m}{s^{2}} \right)\cdot (10\,s)^{2}[/tex]

[tex]s = 219\,m[/tex]

The height of the rock from the ground is 219 meters from the ground.

Answer:

3065.4J

Explanation:

Given parameters:

Mass of water  = 335g

Initial temperature  = 24.5°C

Final temperature = 26.4°C

Unknown:

How much heat is absorbed by the sample  = ?

Solution:

To solve this problem, we use the expression below:

    Heat absorbed  = mass x specific heat of water x change in temperature

The specific heat of water  = 4.816J/g°C

So;

 Heat absorbed  = 335 x 4.816 x (26.4  - 24.5)  = 3065.4J