use the periodic table to answer the question
which statement correctly compares the number of protons and electrons in atoms of rubidium (rb) and calcium (ca)?
A.rubidium has more protons and fewer electrons than calcium
b. rubidium has more protons and more elctrons than calcium
c.rubudium has fewer protons and more electrons than calcium
d. rubidum has fewer protons and fewer electrons than calcium
Answers
Answer: I hope this helps you
Explanation:
Answer:
B. Rubidium has more protons and more electrons than calcium.
Explanation:
Related Questions
If the force on a spring is 2 N and it stretched 1 m, what is the spring
constant?
A. 0.4 N/m
B. 0.2 N/m
C. 2 N/m
D. 4 N/m
Answers
C) 2N/M
The formula is F=ke
where F = force,k= spring constant and e=elasticity
2=k*1
k=(2/1)
k=2N/M
We know
[tex]\boxed{\sf Spring\:constant(k)=\dfrac{F}{x}}[/tex]
[tex]\\ \sf\longmapsto k=\dfrac{2}{1}[/tex]
[tex]\\ \sf\longmapsto k=2N/m[/tex]
think about the objects which acts as concave or convex Mirrors in your surroundings write a report on it
Answers
Answer:
Explanation:
S.No Concave Mirror Convex Mirror
1. Dentist's mirror Rear view mirror of vehicles
2. Shaving Mirror Streetlights
3. Headlight of vehicles Water glass surface
4. Caving side of spoon Curving side of spoon
5. Torch glass Electric Bulb
6. Inner surface of Outer surface of steel basin
steel basin
7. Lunch plates Calling bell
8. Microscope Optical instruments
9. Satellite dishes Fish eye lenses
define simple machine
Answers
Answer:
simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. ... The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.
explain radiation and which is the hotest source in the world
Answers
Ramsar has the highest level of natural radiation in the world.
Hot springs located in the Arkaroola Wilderness Sanctuary in Southern Australia are also credited with higher than normal radiation levels, due to spring water coming in contact with rocks rich in uranium and radon.
What is common between the quantities of area, density and speed?
Answers
Answer:
They are all s
calar quantities
Why does the weight of a body differ on different celestial bodies of the universe?
Answers
In a simple machine the energy input is 120J if the efficiency of the machine is 80% calculate the energy output
Answers
Answer:
24J
Explanation:
The energy output will be the 20% it lost in efficiency:
120-80% = 24J
Dos ciclistas se encuentran compitiendo en un velódromo. Considere que el peso de cada ciclista es W1 y el peso de cada bicicleta es W2. En el instante en el que los dos ciclistas se encuentran uno al lado del otro, es correcto afirmar que:A. Las velocidades de ambos ciclistas son iguales B. Las posiciones y las velocidades son iguales C. Las posiciones son las mismas D. Las posiciones como las aceleraciones son iguales
Answers
Comenzemos con unas definiciones.
La posición nos dice la ubicación espacial de un dado objeto.
La velocidad nos dice como cambia la posición a medida que pasa el tiempo.
La aceleración nos dice como cambia la velocidad a medida que pasa el tiempo.
Teniendo esto en cuenta, la respuesta correcta La respuesta correcta es la opción C: "Las posiciones son las mismas"
Para poder entender esto, podemos desarrollar:
Ahora, supongamos un ejemplo.
Sea una persona caminando y un auto yendo en la misma dirección, de tal forma que la persona comienza varios metros delante del auto.
A medida que el auto aumenta su velocidad, eventualmente se encontrara al lado de la persona.
Naturalmente, es fácil darse cuenta de que tanto la velocidad como la aceleración del auto serán mayores que las de la persona, pero la posición (almenos en una dimensión) será la misma.
Podemos interpolar esto a cualquier situación similar, sabemos que para dos objetos que estén al lado del otro la posición será la misma, pero sin más contexto no podemos concluir nada sobre la relación entre las velocidades y las aceleraciones.
Con esto en mente, la respuesta correcta es la opción C: "Las posiciones son las mismas"
Si quieres aprender más sobre el tema:
https://brainly.com/question/17123407
3. A microwave oven draws 12 A of current on a 110 V household circuit. What is its power
rating?
Answers
Answer:
W = 1320Watts
Explanation:
W = I*V
W = 12A*110V
W = 1320Watts
what is linear expansivity
Answers
Hello,Plz Help Which conditions are necessary for rain to form?
The temperature of the air below the cloud is above freezing.
The temperature of the air below the cloud is below freezing.
The sky has no clouds, and the temperature of the air is cold.
There is a warm layer of air and a cold layer of air closer to the ground.
Answers
The third one makes no since because the clouds carry the rain. It isn’t always cold when it’s going to rain
The fourth one is a good one
The second one again it’s not always cold when it’s raining
The first one could be it also
Hmmm I would go with the last one
Sorry if it’s wrong
The option There is a warm layer of air and a cold layer of air closer to the ground. is the correct answer
what do you mean by scattering of light
Answers
Answer:
Scattering of light is the phenomenon in which light rays get deviated from its straight path on striking an obstacle like dust or gas molecules, water vapours etc. Scattering of light gives rise to many spectacular phenomena such as Tyndall effect and the “red hues of sunrise and sunset”.
The Doppler effect a. can be applied only to sound waves. b. is the basic explanation for the blue shift of light in our Universe. c. occurs when the frequency of sound waves received is lower if the wave source is moving toward you than if it's moving away. d. occurs when the pitch of a sound gets lower if the source is receding.
Answers
Answer:
a. can be applied only to sound waves.
c. occurs when the frequency of sound waves received is lower if the wave source is moving toward you than if it's moving away
d. occurs when the pitch of a sound gets lower if the source is receding.
Explanation:
[tex].[/tex]
the splitting of white light into its constituent colours is called
Answers
The T-chart compares the average temperature and humidity of two different environments. Which of the following correctly labels the environments?
a t-chart with one column labeled A listing: High humidity: 70%, Temperature Range: 2 degrees Celsius (35 degrees Fahrenheit) in the winter to 24 degrees Celsius (75 degrees Fahrenheit); and another column labeled B listing: Low humidity (13-15%), Temperature Range: -18 degrees Celsius (-1 degrees Fahrenheit) to 49 degrees Celsius (120 degrees Fahrenheit)
A is a desert, and B is a tundra.
A is a grassland, and B is a desert.
A is a tundra, and B is a rainforest.
A is a tundra, and B is a swamp.
Answers
Answer:
A turndra B rainforest
Explanation:
If the force of attraction btw earth and us is equal n opposite then why is the net force zero and if it is zero why do we get pulled towards earth
Answers
Answer:
Explanation:
It's not equal and opposite. You're thinking of Newton's 3rd Law. This is not that. This is gravitational attraction between 2 objects. We can figure out mathematically the pull that the earth has on a single person, by using the equation for gravitational force and the universal gravitational constant, G:
[tex]F_g=\frac{Gm_1m_2}{r^2}[/tex] where G is the universal gravitational constant, m1 is the mass of one person, m2 is the mass of the earth, and r-squared is the addition of the radius of the earth plus the radius of you in relation to the surface of the earth.
Let's say a person weighs 150 pounds; in Newtons this is 667 N (rounded from 667.233); his mass then, in terms of the metric system (using 9.8 for gravity), is 68.2 kg. Let's also say that this person is 6 feet tall. 6 feet is the same as 1.83 m (rounded to 3 sig fig's) and the radius from that person's center to the surface of the earth would be about half that height at r = .915 meters. Filling in the formula:
[tex]F_g=\frac{(6.67*10^{-11})(68.2)(5.98*10^{24})}{(6.38*10^6)^2}[/tex] it turns out that the person's radius adds nothing significantly to the radius of the earth, so it doesn't even count mathematically. It's way too small compared to the earth's radius (which is the denominator of that equation). We find that
[tex]F_g=668N[/tex] That's the pull that the earth has on that person which, not coincidentally, is the weight in pounds we said that the person was. Isn't physics amazing!?
mot o to ro ben luc 6h voi van toc toc 40 km/h
Answers
Answer:
? có thể cụ thể hơn ko
Explanation:
In nonequilibrium, total counterclockwise moments = total clockwise moments. *True False
Answers
Answer:
[tex]{ \bf{false}}[/tex]
Explanation:
Because it breaks the law of moments.
A body of mass m moves along y such that at time t its position is y(t)= at^2 – bt + c, where a, b, c are constant.
(a) Calculate the acceleration of the body. (b) What is the force acting on it?
Answers
Answer:
what do u need help with
Explanation:
A body of mass m moves along X-axis such that its position co-ordiante at any instant t is x = `at^(4)
7.
What is TRUE about NIBIN?
ОА. .
It inspired the creation IBIS.
ОВ.
It inspired the creation of IBIS.
O C.
It was created by the FBI and the ATF.
OD.
It was used in the early 1900s.
Reset
Answers
Answer:
the true about n i b i n is they are Commissioner
Answer:
it was created by FBI and ATF
Explanation:
the closes thing I gound to an answer is:
NIBIN is a nationally networked system administered by ATF to assist law enforcement in solving firearms related violent crimes. IBIS is a collection of electronic images ofballistic evidence recovered from crime scenes and test-fired firearms that have been taken into law enforcement custody in the United States.
An imaginary star is four light years from earth. The star has a planet, upon which a large mirror has been installed. The mirror faces earth. A ten year old boy aims his telescope at the mirror. How old will the boy be when he sees his own reflection?
Answers
Answer:
14 years
Explanation:
because the light will take four years to reach the earth. And the star is four light years away from the earth.
Hope that helps you please followAn imaginary star is four light years from earth. The star has a planet, upon which a large mirror has been installed. The mirror faces earth. A ten year old boy aims his telescope at the mirror,then the boy would be 14 years old when he will see his own reflection.
What is a light year?
It can be defined as the distance travelled by the light in one year .it is represented in units of distance such as miles or km.
1 light year is calculated by multiplying the speed of light with the time of one year
1 light year = speed of light × one year time period
1 light year = 3×10⁸ ×(365×24×60×60)
=9.461× 10¹⁵ meter
As given in the problem 10 year old boy aims his telescope at the mirror which is 4 light years away then the light has to travel four years to reach the boy ,then the boy would be 14 year old when he would see his own reflection.
Learn more about light year from here
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In a simple machine the energy input is 120J if the efficiency of the machine is 80% calculate the energy output
Answers
Answer:
E_O = 96J
Explanation:
E_O = E_I*(%e/100%)
E_O = 120J*(80%/100%)
E_O = 96J
What is not one of the main uses of springs?
A. Bike suspension
B. The seasons
C. Clock making
D. Car suspension
Quick answer
Answers
Answer:
b. the seasons
Explanation:
what is the unit of power?
Answers
Answer:
Explanation:
The unit of power is watt .
please answer
during a journey, a car travels at 40 km in 2.5 hours, next 62 km in 3 hours, then took a break for 30 minutes, again travelled the last 120 km in 3.2 hours. calculate the average speed of the car during the journey.
Answers
average speed of the car is 23.9 km/h
A ball is dropped from a height of 180m- Calculate the velocity of the ball when it strikes the ground
Answers
Answer:
6s , 60mls
Explanation:
hope this helps love
Answer:
0m/s
Explanation:
When the object strikes the ground, it then becomes in uniform motion and when an object is in uniform motion, the velocity is 0
How much power does it take to lift a box with a weight of 50N to put it on a shelf that is 10m high in
10 sec?
Answers
We know
[tex]\boxed{\sf Power=\dfrac{Work\:done}{Time}}[/tex]
[tex]\\ \sf\longmapsto Power=\dfrac{Force\times displacement}{Time}[/tex]
[tex]\\ \sf\longmapsto Power=\dfrac{50\times 10}{10}[/tex]
[tex]\\ \sf\longmapsto Power=\dfrac{500}{10}[/tex]
[tex]\\ \sf\longmapsto Power=50W[/tex]
What mechanism of energy is transferred by mass motion of fluid from one region of space to another?
Answers
In the two-slit experiment, the distance between the slits and the screen is 1.15 m and the distance between the slits is 0.100 mm. If the first-order bright fringe is measured to be 4.2 cm from the centerline, what is the wavelength of light?
Answers
D = 1.15 m (distance of slots from
screen)
d = 0.100 mm
10^-4 m (distance between the two slits)
m = 1 (first order bright fringe)
xm = 4.2 cm
0.042 m (distance of first order bright fringe from centreline)
We know that,
xm = m* D λ/d (λ= wavelength)
0.042 = 1* 1.15 λ/10^-4
λ = (0.042 * 10^-4)/1.15
Therefore,
λ = 0.0365 * 10^-4
3.65 * 10^-6 m (approx)
Invisible damage to the body resulting from repeating a movement often is a
Answers
Explanation: The repetitive strain injury (RSI), also known as overuse syndrome, is defined as the invisible damage to the body resulting from repeating a movement. These type of damage can affect the muscles, nerves, ligaments and tendons.
