Answer:
Moseley's work provided a method that could be used to determine exactly how many empty spaces remained in the periodic table. After this discovery, chemists turned to using atomic number as the fundamental ordering principle for the periodic table, instead of atomic weight.
What are isotopes.
Please answer soon
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
A bullet of mass 0.05kg has a speed 400.what is it's kinetic energy.
if the bullet hits a wall of which the average resistive force is 10000 newton.calculate the distance penetrated by the bullet.
Answer:
K.E =1÷2M×V^2
= 1÷2×0.05×(400)^2
= 4000
Explanation:
most neutral atoms of fluorine have an atomic mass of 19 amu and an atomic number of 9. what are these atoms composed of
Answer:
An atom of fluorine has the atomic number 9, and its mass number is 19 amu. Which of the following shows a neutral atom of fluorine? 16 protons and 14 electrons.
Explanation:
ITs 16 protins and 14 ELECTRONS
Answer:
Answer is 9 Protons, 10 Neutrons, and 9 Electrons
Explanation:
A.P.E.X
Un cilindro contiene 10 L de oxígeno y otro contiene 10 L de dióxido de carbono, ambos se encuentran a 25 °C. De acuerdo con el modelo cinético de partículas, se puede afirmar que...
Answer:
Ver explicacion
Explanation:
Según el modelo cinético, las moléculas de gas están en constante movimiento.
La energía cinética promedio de las moléculas del gas depende de la temperatura del gas y de la masa molar del gas.
Si los dos gases ocupan el mismo volumen a la misma temperatura, la energía cinética promedio ahora depende de la masa molar de los gases individuales. Cuanto menor sea la masa molar del gas, mayor será la velocidad media de las moléculas del gas.
El oxígeno gaseoso tiene una masa molar menor que el dióxido de carbono. Por lo tanto, el oxígeno tiene una velocidad molecular promedio mayor que el dióxido de carbono.
1. How far does a 70 kg object move in meters (m) if it
accelerates at 13 m/s2 and 50 joules of work is done?
Answer:
Units of work would be equivalent to a Newton times a meter. ... An individual force does NOT do positive work upon an object if the object is moving at ... FALSE - Watt is the standard metric unit of power; Joule is the standard metric unit of energy. ... TRUE - A kg•m2/s2 is a mass unit times a speed squared unit, making it a ...
EXERCISE 1
An object and an image are displayed on either side of a lens. Copy the figure to your sheet.
A) Calculate the focal length using the lenses formula.
B) Determine where the focal length should be, using the light construction beams.
C) Draw the light beam that illuminates the entire lens from point B. Draw how it continues after the lens.
D) Measure the focal length, object distance and image distance and write it down as shown in the figure under the graph paper.
An instrument that simply measures earth waves is a _______
Answer:
Seismograph
Explanation:
Seismograph, instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth-shaking phenomenon.
Will mark brainliest if right.
How does sound travel? *
Air molecules move in a straight line in one direction.
Air molecules move in waves that sometimes bounce back.
Air molecules move in waves in one direction.
None of the above.
Answer: 2 i think
Explanation:
Answer:Im pretty sure its the second one because sound sometimes bounces back and that causes echo and it doesnt travel in one line or direction
Explanation:
How long a workout session last is called?
Explanation:
Assuming the strength training sessions last roughly 20 minutes each, that breaks down to about three hours of exercise a week. According to these recommendations, beginner exercisers should work up to three to four 40-minute gym sessions per week.
The American Heart Association recommends 75 to 150 minutes of aerobic activity, and two strength training sessions per week. Assuming that strength training sessions last approximately 20 minutes each, that totals about three hours of exercise per week.
A jet plane flying 600 m/s experiences an acceleration of 4g when pulling out of the dive. What is the radius of curvature of the loop in which the plane is flying?
Answer:
The radius of the curve is 9,183.67 m.
Explanation:
Given;
velocity of the jet plane, v = 600 m/s
acceleration of the jet plane, a = 4g = 4 x 9.8 m/s² = 39.2 m/s²
The radius of the curve is calculated from centripetal acceleration formula as given below;
[tex]a = \frac{v^2}{r} \\\\r = \frac{v^2}{a} \\\\r = \frac{600^2}{39.2} \\\\r = 9,183.67 \ m[/tex]
Therefore, the radius of the curve is 9,183.67 m.
The simple act of walking requires single leg
full body
and
a strong
and
full body
you are so wise how do you do it?
La velocidad de crucero de un avión comercial es de 900 km / h. La velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es 303,5 m / s. ¿Cuál de los dos es mayor?
Answer:
La velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es mayor que la velocidad de crucero del avión comercial.
Explanation:
Para poder comparar la velocidad entre el avión comercial y la velocidad alcanzada en la carrera de Fórmula 1 y saber cuál es mayor, dichas velocidades deben estar expresadas en las mismas unidades.
En este caso, se ha decidido expresar la velocidad del avión en m/s. Siendo 1 km equivalente a 1.000 m y 1 h igual a 3.600 segundos, entonces es posible realizar la siguiente conversión:
[tex]900\frac{km}{h} =900\frac{1.000 m}{3.600 s}= 250 \frac{m}{s}[/tex]
Por lo que 900 km/h es equivalente a 250 m/s. Siendo 303,5 m/s mayor a 250 m/s, entonces la velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es mayor que la velocidad de crucero del avión comercial.
How does electricity flow through a conductor?
Answer:
Electricity works by getting a bunch of conductor elements together and creating a flow of electron-stealing patterns through them. This flow is called a current. Conductors need to be surrounded with insulators so the electrons can only go in one direction.
Explanation:
Which statement describes the relationship between bond strength and the melting and boiling points of a substance?
A. As the force between the particles increases, the melting point increases and the boiling point decreases
B. As the force between the particles increases, the melting point decreases and the boiling point increases
C. As the force between the particles increases, the melting and boiling points decrease.
D. As the force between the particles increases, the melting and boiling points also increase.
Answer:
D
Explanation:
The relationship between bond strength and the melting and boiling points can be explained as the force between the particles increases, and the melting and boiling points also increase.Therefore the correct option is D.
What is the boiling point?It is a temperature at which the pressure exerted by the external atmosphere is equal to the vapor pressure of the substance.
The boiling point depends on atmospheric pressure, temperature, bond strength, and vapor pressure of the liquid.
The bond strength between different atoms of the substance greatly influences the boiling point and melting point.
Learn more about boiling point
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bill nye electricity notes
Answer:
the answer is c
Explanation:
A man started at his house and went to the post office, then to the pet store, and finally home again. What is the average velocity if this trip took three hours?
Explain how you arrived at your answer.
Answer:
0
Explanation:
Defining velocity :
Velocity is a vector which is the ratio of a person's total displacement with time.
Displacement, in simple terms refers to the distance between an individual's initial position to his final position.
Man's initial position = House
After all his navigation and points covered irrespective of the distance ;
Final position = House
Hence, we can conclude that the man's Displacement is ;
Final position - Initial position = 0
Hence,
Velocity = Displacement / time taken
Velocity = 0 / 3
Velocity = 0
what is the amount of electrical potential is measured by?
Answer:
Voltmeter
Explanation:
The amount of electrical potential is measured by voltmeter.
Electrical potential is the amount of work needed to move a unit electric charge from a reference point to the specific point in an electric field.
The SI unit of electrical potential is Volt.
Answer:
Volts
Explanation:
The electrical potential is measured by volts. I took the quiz.
Two objects of mass 5 kg and 8 kg at rest F1 and F2 meters force applied on both the boxes respectively If the speed of both the objects after 5 sec become 16m/s and 15m/s respectively find the value of F1 and F2?
Answer:
F1 = 16 N and F2 = 24 N
Explanation:
Formula used => F = m×a and v-u= at
So, as we know force = mass × acc.
so acc. of first block = <math> F1/5 </math>. and acc. of second block = <math> F2/ 8 </math>.......... so as v-u= at.. now
Here u= 0 as the objects are placed at rest initially..
thus, v= at
FOR 1ST BLOCK
16= <math> F1/5 </math> × 5 ==> F1 = 16 N
FOR 2ND BLOCK
15= <math> F2/ 8 </math> × 5 ==> F2= 24 N
A 100-meter sprint is a race using only the straight side
of a racetrack. A 400-meter sprint is a race that makes
one complete lap around a racetrack. Why are velocity
and speed the same for a 100-m sprint but not a 400-m
sprint?
Answer: : it is so because velocity and speed differ each other by direction. in a 100 m sprint race ,the person moves in a straight path without changing its direction where as in a 400 m race , the person moves in a lap around the race track and the direction changes as he turns according to the race track.
Explanation:
During heavy exercise, muscle cells use oxygen more quickly than normal. Which system responds by carrying extra oxygen to these muscle cells?
a. digestive b. circulatory c. nervous
d. immune
Answer:
The answer is B. Circulatory
A rocket is fired at 60 to the horizontal with an initial speed of 200m5 calculate it time of flight and it range on the horizontal plane
Answer:
See answer below
Explanation:
In order to do this, we just need to apply the expression to determine the time of flight. This is given by:
t = 2 V₀ Sinθ / g (1)
We have the initial speed which is 200 m/s, the angle of elevation to the horizontalis 60° and the gravity is 9.8 m/s². Replacing this data in the above expression we have:
t = 2 * 200 Sin60° / 9.8
t = 35.348 sNow that we have the time, we can determine the range or distance in the horizontal plane. This can be calculated using the following expression:
X = V * t (2)
We already have the time, which is the time of flight, the initial speed using cos 60° (Cause it's horizontal plane), and replacing we have:
X = 200 cos60° * 35.348
X = 100 * 35.348
X = 3534.8 mHope this helps
HELPPP ILL GIVE YOU BRAINLIST
which example below best illustrates electrical energy being converted into radiant energy?
A ) Fusing hydrogen nuclei in the sun
B ) Igniting fireworks
C ) lighting an Bunsen burner with a flint striker
D ) Turing on a light bulb
Answer:
Turning on a light bulb.
PLEASE HELP
A 0.200 plastic ball moves with a velocity of 0.30 m/s . It collides with a second plastic ball of mass 0.1200 K B , which is moving along the same line at a speed of 0.10 m/s * A * f * t * e * r the collision , both balls continue in the same direction and the speed of the 0.1200 K B ball is 0.26 m/s . What is velocity of the first ball after the collision?
Answer:
29 m/s.
Explanation:
Hope this helps.
(a) If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 3.0 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g 5 9.80 m/s2 ? (b) Repeat for Mars, where the acceleration due to gravity is 0.38g.
Answer:
See explanation
Explanation:
Range of a projectile is given by; U^2sin2θ/g
When θ = 45°
The maximum range is obtained as;
Rmax = U^2/g
Maximum range on earth = RME = U^2/g
Maximum range in the moon= RMM =U^2/g/6
Maximum range in Mars = RMMA = U^2/0.38g
a)
RME/RMM = U^2/g/U^2/g/6
RME/RMM = 6
But RME = 3 m
RMM = 3 * 6 = 18 m
b)
RME/RMMA =U^2/g/U^2/0.38g
RME/RMMA = 1/0.38
But RME = 3 m
RMMA = 3/0.38
RMMA = 7.9 m
You are so excited that you have finished this test that you give your friend a huge high five with 20N of force.
With how much force does your friend's hand high five you back?
Answer:
20N
Explanation:
newtons 3rd law every action has an equal opposite reaction
I'm not too sure
A guitar player tunes the fundamental frequency of a guitar string to 560 Hz. (a) What will be the fundamental frequency if she then increases the tension in the string by 15%? (b) What will it be if, instead, she decreases the length along which the string oscillates by sliding her finger from the tuning key one-third of the way down the string toward the bridge at the lower end?
Answer:
(a) if she increases the tension in the string is increased by 15%, the fundamental frequency will be increased to 740.6 Hz
(b) If she decrease the length of the the string by one-third the fundamental frequency will be increased to 840 Hz
Explanation:
(a) The fundamental, f₁, frequency is given as follows;
[tex]f_1 = \dfrac{\sqrt{\dfrac{T}{\mu}} }{2 \cdot L}[/tex]
Where;
T = The tension in the string
μ = The linear density of the string
L = The length of the string
f₁ = The fundamental frequency = 560 Hz
If the tension in the string is increased by 15%, we will have;
[tex]f_{(1 \, new)} = \dfrac{\sqrt{\dfrac{T\times 1.15}{\mu}} }{2 \cdot L} = 1.3225 \times \dfrac{\sqrt{\dfrac{T}{\mu}} }{2 \cdot L} = 1.3225 \times f_1[/tex]
[tex]f_{(1 \, new)} = 1.3225 \times f_1 = (1 + 0.3225) \times f_1[/tex]
[tex]f_{(1 \, new)} = 1.3225 \times f_1 =\dfrac{132.25}{100} \times 560 \ Hz = 740.6 \ Hz[/tex]
Therefore, if the tension in the string is increased by 15%, the fundamental frequency will be increased by a fraction of 0.3225 or 32.25% to 740.6 Hz
(b) When the string length is decreased by one-third, we have;
The new length of the string, [tex]L_{new}[/tex] = 2/3·L
The value of the fundamental frequency will then be given as follows;
[tex]f_{(1 \, new)} = \dfrac{\sqrt{\dfrac{T}{\mu}} }{2 \times \dfrac{2 \times L}{3} } =\dfrac{3}{2} \times \dfrac{\sqrt{\dfrac{T}{\mu}} }{2 \cdot L} = \dfrac{3}{2} \times 560 \ Hz = 840 \ Hz[/tex]
When the string length is reduced by one-third, the fundamental frequency increases to one-half or 50% to 840 Hz.
PLS HELP! I WILL GIVE BRAINLIEST TO BEST/ CORRECET ANSWER! 15 POINTS PER PERSON! PLS HELP!
Logan lists the causes of floods in Florida.
Which cause does not belong in the list?
A. big storms
B. inadequate drainage system
C. mild storms
D. rip currents
BTW: The fact that I selected an answer in the picture does not matter. Thank you!
Answer:
c might be right
Explanation:
c doesn't make any sense. big storms mean more water for flooding, inadequate drainage system means the water can't leave certain areas, I'm not sure what rip currents are tho
Answer:
rip currents
I live in florida, and we don't have mild storms either its big one or none :)
Explanation:
and can you help me please, its 30 points
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https://brainly.com/question/21745542
^^ there the same question but the first website i misspelt it but its 30 points and the 2nd website is the question written out right but its 5 point but there the same thing you need to do, you can put the same thing for both and get extra point idc, i just need help lease
You are standing on the bleachers in the gym. What supporting force are you experiencing?
a. Friction
b. Tension
c. Gravity
d. Normal
A backpack weighs 8.2 Newtons and has a mass of 5 kilograms on the moon what is the strength of gravity on the moon
i dont get it so much but
The weight of the bag pack is 8.2 N. g = 1.64 m/s2. Hence, the acceleration due to gravity on moon is 1.64 m/s2. sooo? is it right