Answer:
C
Explanation:
Nitrogen and Oxygen donates electron to each other
Nitrogen and oxygen has the greatest chance of forming a covalent bond. Option C is correct.
What is a covalent bond?Covalent bonds are chemical bonds that keep atoms of different elements together while sharing electrons.
Compounds can be polar covalent or nonpolar covalent, depending on the electronegativity variations between components.
The nitrogen family, Group 15, can react with oxygen in a variety of ways. Nonmetallic elements include nitrogen and phosphorus and oxygen.
Ionic bonds often occur between a metal and a nonmetal. Covalent bonds are most commonly formed between two nonmetals.
Nitrogen and oxygen has the greatest chance of forming a covalent bond from given a pair of atoms.
Hence,option C is correct.a given
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Please help with this question
Answer:
That's true
Explanation:
I've gotten it right
Follow-up Questions
1.
How much stress do you think?
A train traveled 100 kilometers north in 2 hours. After exchanging some railroad cars, it traveled 100 kilometers south in 2 hours along the same track. Why has the train's velocity changed
Answer:Due to change in direction
Explanation:
Given
Initially train has traveled a 100 km in North and after exchanging some railroad cars, it traveled 100 in south.
The velocity of the train changes as it direction of motion changes. Velocity is the vector quantity which require direction and magnitude for its reperesentation.
the volume and the mass of substance are 15cm3 and 27 gm respectively find its density
Answer:
[tex]d=1.8\ g/cm^3[/tex]
Explanation:
Given that,
Mass, m = 27 grams
Volume of the substance, V = 15 cm³
We need to find the density of the substance. We know that, the density of an object is given by mass per unit volume. So,
[tex]d=\dfrac{m}{V}\\\\d=\dfrac{27}{15}\\\\d=1.8\ g/cm^3[/tex]
So, the density of the substance is equal to [tex]1.8\ g/cm^3[/tex].
A wire has a cross sectional area of 4.00 mm2 and is stretched by 0.100 mm by a certain force. How far will a wire of the same material and length stretch if its cross-sectional area is 8.00 mm2 and the same force is used to stretch it
Answer: [tex]0.05\ mm[/tex]
Explanation:
Given
Cross-sectional area of wire [tex]A_1=4\ mm^2[/tex]
Extension of wire [tex]\delta l=0.1\ mm[/tex]
Extension in a wire is given by
[tex]\Rightarrow \delta l=\dfrac{FL}{AE}[/tex]
where, [tex]E=\text{Youngs modulus}[/tex]
[tex]\Rightarrow \delta_1=\dfrac{FL}{A_1E}\quad \ldots(i)[/tex]
for same force, length and material
[tex]\Rightarrow \delta_2=\dfrac{FL}{A_2E}\quad \ldots(ii)[/tex]
Divide (i) and (ii)
[tex]\Rightarrow \dfrac{0.1}{\delta_2}=\dfrac{A_2}{A_1}\\\\\Rightarrow \delta_2=0.1\times \dfrac{4}{8}\\\\\Rightarrow \delta_2=0.05\ mm[/tex]
Kiran runs along a straight road of length 150 m. After
reaching at end of the road he runs back to his initial
position along the same straight path. If he takes a total
time of 1 minute for completing his running, find the
average speed and average velocity of Kiran.
Answer:
Explanation:
Speed and velocity are not the same thing, as I'm sure you have determined while in physics. To find the average speed, we add the total distance run by Kiran and divide that total number of meters by the number of seconds it took to do this (just because I am going to state the speed and velocity in terms of m/s as opposed to m/min). To find the average velocity, we add the displacements together and divide by the total time. First the average speed:
[tex]s=\frac{150+150}{60}=\frac{300}{60}=5\frac{m}{s}[/tex]
Velocity has direction. If Kiran runs to the end of the road (which we will call positive) and then runs back to the start (that direction will be negative), then his displacement fits into the velocity equation as
[tex]v=\frac{150+(-150)}{60}=0[/tex] That means, even though he ran a lot and I'm sure he was very tired, his average velocity for the trip was 0 m/s. When velocity is 0, remember that that means that the total displacement was 0.
What is the temperature difference between 65 degree Celcius and 212 degree Farenheit.
Find the temperature difference in both Celcius and Farenheit scale.
Answer:
65 deg C = 35 deg C below boiling
35 deg C = 35 * 9 deg F / 5 deg c = 63 below boiling deg F
(1 deg C = 9/5 deg F)
212 - 63 = 149
So 65 deg C = 149 deg F
Not sure exactly what's wanted, but
212 deg F = boiling
65 deg C = 149 deg F
Check: 65 * 9/5 + 32 = 149 as found above
Answer:
65 deg C = 35 deg C below boiling
35 deg C = 35 * 9 deg F / 5 deg c = 63 below boiling deg F
(1 deg C = 9/5 deg F)
212 - 63 = 149
So 65 deg C = 149 deg F
Not sure exactly what's wanted, but
212 deg F = boiling
65 deg C = 149 deg F
Check: 65 * 9/5 + 32 = 149 as found above
Explanation:
A (200 g) of water at (80 °C) is mixed with (100 g)of water at (20 °C). What is the final temperature of the water?
Answer:
60 °C
Explanation:
From the question given above, the following data were obtained:
Mass of 1st sample (M₁) = 200 g
Temperature of 1st sample (T₁) = 80 °C
Mass of 2nd sample (M₂) = 100 g
Temperature of 2nd sample (T₂) = 20 °C
Equilibrium temperature (Tₑ) =?
NOTE: Since the sample are the same, the specific heat capacity is constant.
We can obtain the equilibrium temperature as follow:
Heat lost by 1st = heat gained by the 2nd
M₁C(T₁ – Tₑ) = M₂C(Tₑ – T₂)
Cancel out C
M₁(T₁ – Tₑ) = M₂(Tₑ – T₂)
200 (80 – Tₑ) = 100 (Tₑ – 20)
Clear bracket
16000 – 200Tₑ = 100Tₑ – 2000
Collect like terms
16000 + 2000 = 100Tₑ + 200Tₑ
18000 = 300Tₑ
Divide both side by 300
Tₑ = 18000 / 300
Tₑ = 60 °C
Therefore, the equilibrium temperature (i.e the final temperature) of the mixture is 60 °C.
a car moving with a speed of 10 metre per second is accelerator at the rate of 2 metre per second square find its velocity after 6 seconds
a = ( v(2) - v(1) ) ÷ ( t(2) - t(1) )
2 = ( v(2) - 10 ) ÷ ( 6 - 0 )
2 × 6 = v(2) - 10
v(2) = 12 + 10
v(2) = 22 m/s
An alpha particle (charge 2e) is sent at high speed toward an atomic nucleus. The electric force acting on the alpha particle is 79.8 N when it is 2.29 x 10(-14) m away from the nucleus. What is the charge on the atomic nucleus? (e = 1.60 x 10(-19) C, Kc = 9 x 10(9) N•m(2)/c(2)
Answer:
1.45×10⁻¹⁶ C
Explanation:
Applying,
F = kqq'/r²................ Equation 1
Where F = force acting on the alpha particle, k = coulomb's constant, q = charge on the alpha particle, q' = charge on the atomic nucleus, r = distance of seperation between the alpha particle and the atomic nucleus.
make q' the subject of the equation
q' = Fr²/(kq)................. Equation 2
From the question,
Given: F = 79.8 N, r = 2.29×10⁻¹⁴ m, q = 2e = (2×1.6×10⁻¹⁹) = 3.2×10⁻¹⁹ C, k = 9×10⁹ Nm²/C²
Substitute these values into equation 2
q' = [79.8×(2.29×10⁻¹⁴)²]/(3.2×10⁻¹⁹×9×10⁹)
q' = (4.18×10⁻²⁶)/(2.88×10⁻¹⁰)
q' = 1.45×10⁻¹⁶ C
How many types of galaxies are there?
a. 3
b. 4
c. 5
d. 6
I'm walking 1.6m/s to 7-11 and it started to rain so I sped up to 2.7m/s in 1.2
seconds. What is my acceleration?
a=(vf-viyt
-0.92m/s2
O 01.1m/s2
0.92m/s2
1.1m/s2
1 points
Save A
Answer:
Explanation:
[tex]a = \frac{v_f-v_0}{t}[/tex] which is the final velocity minus the initial velocity in the numerator, and the change in time in the denominator. For us:
[tex]a=\frac{2.7-1.6}{1.2}[/tex] so
a = .92 m/s/s (NOT negative because you're speeding up)
A 20 ohm and 60 ohm light bulb are put in series together which one would be brighter?
Answer:
The 60 Ohm bulb would be brighter than the 20 Ohm bulb.
Explanation:
Hi there!
Ohm's Law: [tex]V=IR[/tex] where V is voltage, I is current and R is resistance
Power equation: [tex]P=VR[/tex]
The greater the power of a bulb, the brighter it is.
The bulbs are connected in series, meaning the the current travelling through each will be the same. Plug Ohm's law into the power equation so we just have I and R:
[tex]P=I^2R[/tex]
Because the current stays the same, the bulb with greater resistance will have greater power, hence being brighter. Therefore, the 60 Ohm bulb would be brighter than the 20 Ohm bulb.
I hope this helps!
Answer:
The 60 Ohm bulb would be brighter than the 20 Ohm bulb.
Explanation:
Hi there!
Ohm's Law: V=IRV=IR where V is voltage, I is current and R is resistance
Power equation: P=VRP=VR
The greater the power of a bulb, the brighter it is.
The bulbs are connected in series, meaning the the current travelling through each will be the same. Plug Ohm's law into the power equation so we just have I and R:
P=2RP=I
2
R
Because the current stays the same, the bulb with greater resistance will have greater power, hence being brighter. Therefore, the 60 Ohm bulb would be brighter than the 20 Ohm bulb.
I hope this helps!
What is the magnification when an object is placed at 2f from the pole of the convex mirror?
-2/ 3
-3/2
-1
-1/3
Answer:
Linear magnification = 1/3
Explanation:
Given:
Convex mirror
Object's distance from pole = 2f
Find:
Linear magnification
Computation:
Object distance, u = −2f
So,
1/v + 1/u = 1/f
1/v + 1/(-2f) = 1/f
1/v = 1/f + 1/2f
BY taking LCM
1/v = 3 / 2f
v = 2f / 3
Magnification, M = -v / u
So,
Magnification, M = (2f / 3) / 2f
Magnification, M = 2f / 6f
Magnification, M = 2 / 6
Linear magnification = 1/3
Un motor realiza un trabajo de 5000 j en 20 s a) ¿ cual es la potencia del motor ?B)¿en cuanto tiempo desarollan el mismo trabajo una maquina de 15 w ?
Answer:
a. Potencia = 250 Watts
b. Tiempo = 333.33 segundos
Explanation:
Dados los siguientes datos;
Energía = 5000 Joules
Tiempo = 20 segundos.
Para encontrar el poder;
Poder = energía/tiempo
Potencia = 5000/20
Potencia = 250 Watts
B. ¿Para saber cuánto tarda una máquina en realizar el mismo trabajo;
Dado: potencia = 15 W
Tiempo = energía/poder
Tiempo = 5000/15
Tiempo = 333.33 segundos
what is the size of the electron charge?
Answer:
It’s like medium uk
Explanation:
The size of electron charge is estimated to be 1.6 × 10-¹⁹
Explain how frequency and amplitude affect sound vibrations?
Answer:
The larger the amplitude of the waves, the louder the sound. Pitch (frequency) – shown by the spacing of the waves displayed. The closer together the waves are, the higher the pitch of the sound.
Explanation:
Light travels through space at a speed of 3.0 x 108 m/s. A space probe is
traveling toward Earth at 2.5 * 108 m/s when one of its spotlights is turned
on. What speed would an observer on Earth measure for the light from the
spotlight?
O A. 2.5 * 108 m/s
O B. 3.0 x 108 m/s
O c. 5.5 x 108 m/s
O D. 0.5 x 108 m/s
Explanation:
The answer is (B). The speed of light is the same for all observers regardless of their motion relative to the light source.
The speed would an observer on Earth measures for the light from the spotlight will be 3×10⁸ m/sec.
What is speed?Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its si unit is m/sec.
The given data in the problem is;
The speed of light is, [tex]\rm C =3 \times 10^8\ m/sec[/tex]
All frames of reference have the same speed of light in a vacuum. Therefore the speed would an observer on Earth measures for the light from the spotlight will be 3×10⁸ m/sec.
Hence option B is correct.
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A power plant burns fuel to convert water to steam. During the process, 83% of the heat produced is transferred. Of the heat carried by the steam, 40% is converted to the mechanical energy of the spinning turbine. Which best describes the overall efficiency of the heat-to-work conversion in the plant
Answer: [tex]33.2\%[/tex]
Explanation:
Given
83% heat is transferred and out of this, only 40% is converted to the mechanical energy of spinning turbine.
The overall efficiency is the product of all the efficiency i.e.
[tex]\eta_t=0.83\times 0.4\\\eta_t=0.332\ \text{or}\ 33.2\%[/tex]
HI PLEASE HELP!
How do glow sticks affect the temperature of hot an cold water?
Will give brainliest. Will report any links or irrelevant answers so don’t even try.
Answer:
Chemical reactions occur slower at lower temperatures and faster at higher temperatures. When you put a glow stick in cold water, the chemical reaction slows down but will last for a longer period of time. When you put a glow stick in hot water, the reaction speeds up but will be over quicker.
Explanation:
(self-explanatory)
I hope this helps, have a nice day.
Sounds are made when objects ____ in air. What one word completes the sentence?
If anybody could help me it would be nice :) <333
Answer:
are crashing?
hope it's good hahah.
The correct answer is: "vibrate".
To find the correct word to complete the sentence, we need to know more about the sound wave.
What is sound wave?
Sound wave is a longitudinal wave i.e. the particles vibrate along the direction of propagation of wave.It requires a material medium to travel i.e. it can not travel in vacuum.How does sound wave produce?
Sound wave is produced due to variation of pressure in a medium. The high pressure region is compression region and low pressure region is rarefaction region.In case of an object, these pressure variations are produced by its vibration in a medium.Thus, we can conclude that sounds are made when objects vibrate in air.
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You have just learned that the planet core of Mars is no longer radiating heat like the core of Earth. With this information what would you communicate to building designers as the lead geologist in regards to suitable building locations on the surface of Mars? Remember your informing builders about locations that would best avoid natural disasters like marsquakes and volcanoes? What evidence or theories do you have to support your statements?
Answer:
Explanation:
That is a fun question!
Without a hot radiating core like Earth, Mars will have very different geological and seismic events. The Mars core will be relatively cold and there will not be any molten magma. So Mars will not have earthquakes or volcano activities. Both only occur when there is magma flowing or tectonic plate motion and they will not occur with a cold core.
An object of mass m slides down an incline with angle 0.
Which expression
shows the net force on the object along the surface of the incline?
A. mg cos(0) - FN
B. mg cos(0)
C. mg sin(0)
D. mg sin(0) - FN
Answer:
C. mg sin(θ)
Explanation:
The plane is incline and the only force acting in the object is the gravity, so you multiply mg per sin(θ) because sin(θ) gave you the part of the gravity acting in the horizontal direction parallel with the inclined surface
The expression shows the net force on the object along the surface of the incline is mg sin(θ). The correct option is C.
What is Net force?When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.
An object of mass m slides down an incline with angle (θ).
The plane is incline and the only force acting in the object is the gravity, The weight or gravity acting in the horizontal direction parallel with the inclined surface is mg sin(θ).
Thus, the correct option is C.
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True or false
scientific research has now proven that atoms are composed of parts that are larger than protons neutrons and electrons
Answer:
False
Explanation:
parts that are smaller than protons neutrons and electrons
A 60-W light bulb runs on 120 V and draws 0.50 A of current when running
for 10 minutes (600 seconds). How much energy does the light bulb use up
this time?
Answer:
3600 J
Explanation:
According to given question
P(rated)=60w
V= 120
I =0.50 A
t=600 second
Now,
Energy can be calculated as :
[tex]E= VI*t[/tex]
Where,
V is voltage
I is current
t is time in second
Now,
Putting the all value in above equation E
So,
[tex]E=120*0.5*600\\E=36000 J[/tex]
Therefore, 36000 J energy use up by light bulb
what are the four importance of apron?
Answer:
To prevent our clothes from dust, dirt, spills and debris during cooking, serving, cleaning or performing a creative task. Aprons protect your clothes and acts as a protective barrier.
car moves a distance of 420 m. Each tire on the car has a diameter of 42 cm. Which shows how many revolutions each
tire makes as they move that distance?
Plzzzz help asap
Answer:
10 is the correct answer
Answer:
Total Distance: 420 meters
Diameter: 42 cm
Notice the units meters vs cm
420÷ 42 = 10 total revolutions
In which stage of a star's life cycle, does gravity and fusion become balanced, and an adult star forms?
A. Main-sequence
B. Red supergiant
C. Protostar
D. White dwarf
Answer:
im guessing red giant-
(give the answer or I'll report) please solve it with the steps
Answer:
The required elastic potential energy is 0.068J
Explanation:
Given,
Spring force constant, k= 3.4 N/M
Spring stretch length/ Displacement, x= 0.2m
We know,
Elastic potential energy, V= [tex]\frac{1}{2} kx^{2}[/tex]
=[tex]\frac{1}{2}*3.4*(0.2)^{2}[/tex]
=[tex]\frac{0.136}{2}[/tex]
=0.068
∴The required elastic potential energy is 0.068J
HELP PLEASE
A virtual image is produced by a convex mirror that is 1.60 cm from the mirror. If the magnification is 0.20, how far from the mirror is the object?
The distance of the object from the mirror Is = –8 cm
Calculation of the object distance of a mirrorThe image distance from the mirror = –1.60cm
The magnification of the image = 0.20
The distance of the object from the mirror can be calculated using the formula below:
magnification= – image distance/ object distance
Substitute the available values into the equation above,
0.20 = – 1.60/ X
Make X the subject of formula,
X = – 1.60/0.20
X = – 8cm
The negative sign indicates that the image is virtual which is formed behind the mirror.
Therefore, the distance of the object from the mirror Is = –8 cm.
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