Answer: tendons connect muscles to bones
Explanation:
A type of Lead (Pb) ion has a + 4 oxidation number. Sulfur (S) has a — 2 oxidation number. What would be the chemical formula for the compound of these two elements?
Answer: The chemical formula for the compound of these two elements is [tex]PbS_2[/tex]
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here metal lead is having an oxidation state of +4 called as [tex]Pb^{4+}[/tex] cation and sulphur non metal has oxidation state of -2 called as [tex]S^{2-}[/tex]. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]PbS_2[/tex]
The chemical formula for the compound of these two elements is [tex]PbS_2[/tex]
State the name of the process in each of the following changes of state:
a) Solid to a liquid
b) Liquid to a solid
c) Gas to a liquid
d) Liquid to a gas
Answer:
A. Melting
B. Freezing
C. Condensing
D. Boiling
Explanation:
Need help on circuit question
Object A has a mass of 10 kg and is moving at a velocity of 2.0
m/s. So Object A's momentum is - kg. m/s.
Answer:20kgm/s
Explanation:
Mass=10kg
Velocity=2m/s
Momentum=mass x velocity
Momentum=10 x 2
Momentum=20
Momentum=20kgm/s
The object with mass m when moving with the velocity, its momentum can be calculated. The momentum of the object A is 20 kg.m/s.
What is momentum?Momentum is the product of mass and velocity of a moving object.
If the momentum is p, the mass of the object is 10 kg and the velocity is 2.0 m/s, then the momentum will be
p = 10 × 2.0
p = 20 kg.m/s
Thus, the momentum of the object A is 20 kg.m/s
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A car started from rest and moved along a straight road with constant acceleration of 2.0m/s-² for 6s.Calculate the speed of the car 6s after starting to move.
Answer:
The speed of the car 6 s after starting to move is 12 m/s.
Explanation:
A car started from rest and moved along a straight road with constant acceleration of [tex]2\ m/s^2[/tex] for 6 seconds.
It is required to find the speed of the car 6 s after starting to move. Let v is the final speed of the car.
The relation between speed, acceleration and time is given by :
[tex]v=u+at[/tex]
u = 0
[tex]v=at\\\\v=2\ m/s^2\times 6\ s\\\\v=12\ m/s[/tex]
So, the speed of the car 6 s after starting to move is 12 m/s.
A pendulum is swinging back and forth with a period of 2.0 seconds here on Earth. This pendulum is then brought to the Moon, where the acceleration due to gravity is much smaller. What will happen to the period of the pendulum, assuming everything else about it (mass, length, initial swing height, etc) remains exactly the same
Answer: The period will be larger, with T = 4.92 seconds
Explanation:
The period of a pendulum can be obtained by the equation
T = 2*pi*√(L/g)
Where pi = 3.14, L = lenght of the pendulum and g = gravity acceleration.
You can see that the gravitational acceleration is on the denominator, this means that if we decrease the value of g, then the value of T will increase.
In Earth we have that:
2s = 2*3.14*√(L/9.8m/s^2)
L = (1/3.14)^2*9.8 m = 1m
In the moon we have g = 1.62 m/s^2
then the period in the moon is:
T = 2*3.14√(1/1.62) = 4.92s
Indica qué es una propiedad específica de la materia. Además explica por qué son útiles las propiedades específicas de la materia frente a las generales.
Answer:
Check Explanation
Comprobar explicación
Explanation:
English Translation
Indicate what a specific property of matter is. Also explain why the specific properties of matter are useful compared to the general ones.
Solution
The specific properties of matter are properties that describes the intensive properties of the system. They are properties that do not depend on or change with the extent or size of the system. They are usually obtained by dividing the generalised properties or extensive properties by the extent or size of matter to make them independent of size/extent/Mass.
Examples of specific properties include specific heat capacity, specific volume etc. They usually have units of general units/Mass units.
The specific properties of matter are more important than the general ones because
- They help in general comparisons of the properties of different materials. They are used to rank, classify and compare properties of different materials.
- They are used in reference table/data to easily record easily accessible properties of matter. It helps to record standards that are general and independent of sizes/extents/Mass, thereby keeping the reference table/data/chart precise and concise.
- They provide us with values that are easy to memorize and remember, unlike trying to cram the different properties of different masses/sizes of matter.
In Spanish/En español
Las propiedades específicas de la materia son propiedades que describen las propiedades intensivas del sistema. Son propiedades que no dependen ni cambian con la extensión o el tamaño del sistema. Por lo general, se obtienen dividiendo las propiedades generalizadas o las propiedades extensivas por la extensión o el tamaño de la materia para hacerlas independientes del tamaño / extensión / masa.
Los ejemplos de propiedades específicas incluyen capacidad calorífica específica, volumen específico, etc. Usualmente tienen unidades de unidades generales / unidades de masa.
Las propiedades específicas de la materia son más importantes que las generales porque
- Ayudan en las comparaciones generales de las propiedades de diferentes materiales. Se utilizan para clasificar, clasificar y comparar propiedades de diferentes materiales.
- Se utilizan en la tabla / datos de referencia para registrar fácilmente propiedades de materia fácilmente accesibles. Ayuda a registrar estándares que son generales e independientes de tamaños / extensiones / masa, manteniendo así la tabla / datos / tabla de referencia precisa y concisa.
- Nos proporcionan valores que son fáciles de memorizar y recordar, a diferencia de tratar de agrupar las diferentes propiedades de diferentes masas / tamaños de materia.
Hope this Helps!!!
¡¡¡Espero que esto ayude!!!
Chris has a part time job as a cannon ball catcher for the circus. One day he was located an unknown distance away from the cannon. A cannonball was fired from the cannon at 425 m/s. The speed of sound was 345 m/s. Unfortunately the cannonball went past Chris 0.20 s before he heard the sound of the blast. How far away was the cannon from Chris?
show work with answer for brainliest plz
Answer: 366.56 meters.
Explanation:
Velocity of the cannon ball = 425m/s
Velocity of sound = 345 m/s
For the "position" of both, we have the equation:
Pc = 425m/s*t
Ps = 345m/s*t
Where t is time in seconds.
If the position of Chris is X, we have that if the ball reaches the position of Chris in T seconds, then the soundwave reaches the position of Chris in T + 0.20 seconds, we can write this as:
425m/s*T = X
345m/s*(T + 0.20s) = X
Now we can solve this system of equations. First we can replace the first equation in the second equation and get
345m/s*(T - 0.20s) = 425m/s*T
Now we solve this for T.
345*T + 69 = 425*T
69 = (425 - 345)*T = 80*T
T = 69/80 = 0.8625 seconds.
Now we replace this in the first equation and get:
X = 425m/s*T = 425m/s*0.8625s = 366.56 meters.
A 200 kg golf cart strikes a 1500 kg car with 1000N of force, bringing its velocity from 5 m/s to 0 m/s in 1 second. How much force did the car apply to the golf cart?
Question 6 options:
100 N
1000 N
1500 N
Not enough information has been given to solve the problem
1000N
Explanation:From Newton's third law of motion, for every action there is an equal and opposite reaction. In other words, when two bodies are in collision, the forces acting between these bodies are equal in magnitude and opposite in direction.
In the case presented in the question, the bodies are the golf cart and the car. During collision, the golf car strikes the car with a 1000N of force (that is the action). Consequential of this, though in the opposite direction, the car will apply an equal force of 1000N (that is the reaction) on the golf car.
Therefore the car applied a force of 1000N on the golf cart.
Answer:
The car applied a force of 1000 N to the golf cart
Explanation:
Based on the laws of conservation of linear momentum, we have that linear momentum is always conserved during a collision.
By Newtons Second law, (impulse law),
[tex]Ft = [m_{1}(v-u)+ m_{2}(v-u)][/tex]
Let m 1 be the mass of the golf cart, and v 1 its initial velocity. They are = 200 kg and 5 m/s respectively.
Let m 2 be the mass of the car, and V 2 it initial velocity. They are = 1500 kg and 0 m/s respectively.
The time involved is 1 second
Applying the values of the variables to the formula, we have.
[tex]F \times 1 = [200 \times (5-0) - 1500 \times (0-0)][/tex]
From this we have that the force the car applied to the golf cart is = 1000 N
On a sky coaster (human pendulum) that reaches 20 meters from it's equilibrium position, a man of 70 kg is able to reach a maximum speed of
Answer:
Explanation:
Using the principle of conservation of energy, the potential energy is converted to kinetic energy, assuming any losses.
Kinetic energy is given by ½mv²
Potential energy is given by mgh
Where m is the mass, v is the velocity, g is acceleration due to gravity and h is the height.
Equating kinetic energy to be equal to potential energy then
½mv²=mgh
V
Making v the subject of the formula
v=√(2gh)
Substituting 9.81 m/s² for g and 20 m for h then
v=√(2*9.81*20)=19.799 m/s
Rounding off, v is approximately 20 m/s
Answer:
19.8 m/s
Explanation:
During the motion of a pemdulum bob, it casually converts kinetic energy to potential energy and vice versa.
A pendulum bob reaches its maximum speed at a position closest to its equilibrium position and has its lowest when it is farthest from the equilibrium position.
The maximum speed of a pendulum bob based on the mass involved and the maximum displacement from the equilibrium position is obtained from
Maximum kinetic energy = Maximum potential energy
Maximum potential energy occurs at the farthest point from equilibrium, that is,
P.E(max) = mgh
Maximum kinetic energy = ½mv²
½mv² = mgh
v = √2gh
g = acceleration due to gravity = 9.8 m/s²
h = farthest height from equilibrium position = 20 m
v = √(2×9.8×20) = 19.8 m/s
Hope this Helps!!!
Which waves can travel through empty space?
A. Light waves
B. Water waves
C. Sound waves
D. Mechanical waves
Answer:
A. light waves
Explanation:
just learned this in science class lol
by space it means in a vacuum. Light waves, or radiation, are the only waves capable of going through a vacuum.
Answer:
A
Explanation:
Dust and gas are pulled together by the force known as what?
Answer:
Gravity
Explanation:
In astronomy, dust and gas get pulled together by gravity forming Nebula's, famous nebula's include the Crab Nebula, Orion Nebula and Helix Nebula.
Most of the Nebula's consist of hydrogen.
IS IT right to the left a b c d
Answer:
c ok
Explanation: right?
Answer:
16
Explanation:
A 100 Hz wave and a 200 Hz wave travel through the same medium. Which wave has the longer wavelength? Why? Which one travels at a greater speed?
Explanation:
100Hz wave have longer wavelength and hence more speed
O rază de lumină cade sub un unghi de incidență i=30⁰ pe o suprafață
plană ce separă două materiale transparente cu indici de refracție n 1 = 1,60
și n 2 = 1,40.
Calculați unghiul de refracție (din mediul cu indicele de refracție mai mic).
Sugestie: sin 30⁰ = ½.
Answer:
Explanation:
The question in english is:
A ray of light falls under an angle of incidence of 30 degrees on a flat surface that separates two transparent materials with indexes of refractions 1.60 and 1.40, respectively.
Calculate the angle of refraction (from the environment with the lower index of refraction)
Solution
According to Snell's Law :
[tex]n_{1}sin(\theta_{1})=n_{2}sin(\theta_{2})[/tex]
Where:
[tex]n_{1}=1.6[/tex] is the first medium index of refraction
[tex]n_{2}=1.4[/tex] is the second medium index of refraction
[tex]\theta_{1}=30\°[/tex] is the angle of the incident ray
[tex]\theta_{2}[/tex] is the angle of the refracted ray
We need to find [tex]\theta_{2}[/tex] from the equation above,
[tex]\theta_{2}=sin^{-1}(\frac{n_{1}}{n_{2}}sin\theta_{1} )[/tex]
[tex]\theta_{2}=sin^{-1}(\frac{1.6}{1.4}sin(30\°)[/tex]
[tex]\theta_{2}=34.84\°[/tex]
Therefore, the angle of refraction is 34.84°If the electrons in an atom were stationary, they would be ___ the nucleus
Answer:
Matter in the universe is made up of atoms, particles if electrons were to be stationary, they would have fallen into the nucleus because of electrostatic force acting on them destroying very existence of an atom we know.
a 25 ohm resistor in an electric circuit draws a current of 5 amperes a certain amount of charge through the resistor in 36 seconds calculate the voltage
Answer:
V= 125volts
Explanation:
R =25ohms
I = 5 amp
V = ?
t = 36seconds
V = IR
V = 5× 25
V= 125volts
Q = It
Q = 5×36
Q = 180 coulombs
Q is the amount of charge.
A rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.40 T. The length of the loop L is 0.16 m and its width w is 0.040 m. What is the magnetic flux through the loop when the plane of the loop is perpendicular to the magnetic field?
Explanation:
hope this helps you...........
The magnetic flux through the loop when the plane of the loop is perpendicular to the magnetic field is 0.0256 Weber.
What is magnetic field?The magnetic field is the region of space where a charged object experiences magnetic force when it is moving.
The formula for magnetic flux is given as;
φ = BAcosθ
Given, a rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.40 T. The length of the loop L is 0.16 m and its width w is 0.040 m.
Area of the loop = L x w
A = 0.16 x 0.040 m
A = 0.0064 m²
So, flux will be
φ = 0.4 x 0.0064 x cos90°
φ = 0.00256 Wb
Thus, magnetic flux through the loop when the plane of the loop is perpendicular to the magnetic field is 0.0256 Weber.
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Help I need a answer to this
Answer:
1700 Joules
Explanation:
Work=force x distance
Force = 170 kg
Distance= 10 Meters
170 x 10 = 1700 Joules of work
Chet plans an experimental investigation to see how well a new fertilizer works on daisies. The fertilizer must be dissolved in water and delivered to the plants by spraying it onto the leaves and stems.
To set up his control group for the experiment, Chet should leave out what
Answer:
The answer is D or Fertilizer, sorry for the late answer
Explanation:
Answer:
D Fertilizer hope this helps ..
Explanation:
A patient has an ongoing history of cancer. She has a tumor in the abdominal region, and has been undergoing treatment for it. There may be other tumors and a potential blockage in the surrounding area that need to be investigated. The imaging technique that might provide the most information in this case is . Joe has ongoing issues with his throat and feels some sort of blockage or abnormality as he swallows. The doctor decides to use X-ray imaging to visualize Joe’s internal anatomy as he swallows to help determine the nature of the problem. will be used for this procedure.
answer: 1. a CT scan
2. Fluoroscopy
Answer:
the answer is at the BOTTOM OF THEIR QUESTION
Explanation:
IT IS CORRECT BTW
A man can lift a mass of 200kg onThe surface of the earth. what is the amount of mass he can lift on the surface of the moon?
Answer:
1,211.1 kg.
Explanation:
the force of gravity is less on the moon than on earth, so if the man can lift 200kg on earth, he could lift a greater amount on the moon because there is less resistance from gravity.
To know the amount of mass he can lift on the moon, we first need to know the amount of weight that is equivalent to those 200kg here on earth. This because the weight of the object is equal to the force that must be applied to lift it, and that force is applied by the man and it will be the same here and on the moon.
We calculate weight using the formula:
[tex]w=mg[/tex]
where [tex]w[/tex] is the weight of the object (the force with which the earth attracts the object) [tex]m[/tex] is the mass and g the acceleration of gravity.
so
[tex]w=200g[/tex]
for earth the acceleration due to gravity is: [tex]g=9.81m/s^2[/tex]
thus:
[tex]w=(200kg)(9.81m/s^2)\\w=1962N[/tex]
now we use this value to calculate the mass he can lift on the moon, since for the moon [tex]g=1.62m/s^2[/tex].
we use the same equation, w =mg substituting w = 1962N and [tex]g=1.62m/s^2[/tex]:
[tex]w=mg\\\\1962N=m(1.62m/s^2)\\\\m=\frac{1962N}{1.62m/s^2}\\\\ m=1,211.1kg[/tex]
he can lift 1,211.1 kg.
You can also find the result using the approximate value of the acceleration of gravity on the moon as g/6, where g is the acceleration on earth.
You toss an apple across the room to a friend. Which of the following
statements is true about the apple at the top of its trajectory?
Your question is incomplete. Please find below the complete question.
B. Its acceleration is 9.8 m/s^2 down.
What does acceleration mean?Acceleration, is the rate at which speed adjustments with time, in phrases of pace and path. A point or an item moving in a line is expanded if it hurries up or slows down.
We always have a vertical (downward ) acceleration of 9,8 m/s^2. The horizontal acceleration is zero in case you overlook friction forces. The vertical issue of speed is zero on the top of the trajectory whilst the horizontal component isn't like zero in any other case the apple will no longer arrive at your buddy.
You toss an apple across the room to a friend. Which of the following statements is true about the apple at the top of its trajectory?
A. Its acceleration is zero.
B. Its acceleration is 9.8 m/s2 down.
C. The horizontal component of its velocity is zero.
D. The vertical component of its velocity is 9.8 m/s down.
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Can someone please help me? If somebody pushes a cart with 4N of force and the cart moves a distance of 2 meters, how much work did they do?
Answer:
Work done, W = 8 J
Explanation:
We have,
Force acting on the cart is 4 N
Cart covers a distance of 2 m
We need to find the work done by the cart. Work done by an object is given in terms of force and displacement. It can be given by :
[tex]W=Fd\\\\W=4\ N\times 2\ m\\\\W=8\ J[/tex]
So, the work done by the cart is 8 J.
which is a harmful role of bacteria of bacteria?
Answer:
Harmful bacteria are called pathogenic
Explanation:
Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.
A car takes 15 minutes to travel along a road that is 20 km long.
What is the average speed of the car?
A. 75 km/h B. 5.0 km/h C. 80 km/h D. 300 km/h
Answer:
C
Explanation:
15. 20
x4. x4
60. 80
80km/h
Answer:
80km/h
Explanation:
solution
given
d=20km
t=15min/60min=0.25h
s=?
s=d/t
s=20km/0.25h
s=80km/h
Which step should you take before you begin a scientific investigation? Print the directions after you complete the experiment. Test out all of the emergency equipment you may need. Clarify any confusing information in the instructions. Purchase the equipment and chemicals you will need.
Answer:
Clarify any confusing information in the instructions.
Purchase the equipment and chemicals you will need.
Explanation:
Steps of a scientific investigation include identifying a research question or problem, forming a hypothesis, gathering evidence, analyzing evidence, deciding whether the evidence supports the hypothesis, drawing conclusions, and communicating the results.
Answer:
C. Clarify any confusing information in the instructions
Explanation:
This is not a multiple choice question, however, all of these are correct. The question above is looking for the BEST step to take before beginning.
Verified as correct on e2020
Se dispone de dos vasos con agua a 20 grados y queremos calentarlo hasta alcanzar 50 grados. Si el primero contiene 0,5l y el segundo, 750ml, cual de los dos requerirá mas cantidad para alcanzar la temperatura deseada? Porque?
Answer:
The cup with 0.5L
Explanation:
To know what amount of water you take into account the specific heat of the water. The specific heat of water is:
[tex]c_{water}=4186\frac{J}{kg\°C}[/tex]
Thus, 4186 J of energy are needed to icrease the temperature of 1 kg water in 1°C. Then, more grams of water will need more energy.
You have that one cup has 0.5 L and the other one has 750mL = 0.75L
The second cup of water will need more heat because the amount of water contained in the second cup is greater than in the first cup with 0.5L
Diffraction of white light with a single slit produces bright lines of different colors.What is the color of the central image?
Answer:
white
Explanation:
This experiment causes lines of different colors because the constructive interference depends on the wavelength, so for different wavelength, the position of the maximum will be different.
Now, in diffraction fo a single slit we always have a central maximum (for all the colors)
This means that after the diffraction, we will have that all the colors have a maximum in the center, which will produce white light again, then the color of the central image is white
which has a greater kinetic energy, a bowling ball that has a mass of 5kg travelling at 6m/s, or a ship that has a mass of 120000kg and is moving at 0.02m/s?
Answer:bowling ball has greater kinetic energy
Explanation:
Kinetic energy of bowling ball:
mass=m=5kg
Velocity=v=6m/s
Kinetic energy =ke
Ke=0.5 x m x v x v
Ke=0.5 x 5 x 6 x 6
Ke=90J
Kinetic energy of ship:
mass=m=120000kg
velocity=v=0.02m/s
Ke=0.5 x m x v x v
Ke=0.5 x 120000 x 0.02 x 0.02
Ke=24J
The bowling ball has greater kinetic energy than the ship.
What is kinetic energy?The kinetic energy of an object is the work an object can do by its motion. Kinetic energy is a scalar quantity as it does have magnitude only.
When work is done, energy is transferred, and the object moves at a new speed. The energy is transferred kinetic energy, which depends on the mass and speed.
The SI unit of kinetic energy is Joule and the CGS unit of kinetic energy is erg. The expression of kinetic energy that is used to calculate it is:
K.E. = (1/2) mv²
The mass and the velocity of the bowling ball are 5 Kg and 6 m/s respectively.
The kinetic energy of the bowling ball = (1/2) × 5× (6)² = 90 J
The mass and the velocity of the ship are 120000 Kg and 0.02 m/s respectively.
The kinetic energy of the bowling ball = (1/2) × 120000× (0.02)² = 24 J
Therefore, the kinetic energy of the bowling ball is greater than the ship.
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