Answer:
3.71 × 10²¹ atoms
Explanation:
The molar mass of P₂O₅ is 283.89 g/mol. The moles of P₂O₅ corresponding to 0.250 g of P₂O₅ are:
0.250 g × (1 mol/283.89 g) = 8.81 × 10⁻⁴ mol
In 1 mole of P₂O₅ there are 6.02 × 10²³ molecules of P₂O₅ (Avogadro's number). In 8.81 × 10⁻⁴ moles of P₂O₅, the molecules of P₂O₅ are:
8.81 × 10⁻⁴ mol × (6.02 × 10²³ molecule/ 1 mol) = 5.30 × 10²⁰ molecule
In 1 molecule of P₂O₅, there are 7 atoms (2 atoms of P and 5 atoms of O). In 5.30 × 10²⁰ molecules of P₂O₅, the number of atoms is:
5.30 × 10²⁰ molecule × (7 atom/1 molecule) = 3.71 × 10²¹ atom
A 20000 kg rocket has a rocket motor that generates 3.0×105 n of thrust. part a what is the rocket's initial upward acceleration?
Answer:
a=5.20 m/s²
Explanation:
Given Data
Thrust = T (N)=3.0×10⁵N
Mass=m=20000kg
To find
acceleration=a=?
Solution
Newton Second law states that
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
(resultant force F)=ma
a=(resultant force F)/m
where
(resultant force F) is (Thrust-weight)
Weight = mg = 2.0^4 kg*9.8 N/kg = 1.96^5 N
a = (resultant force F) / mass
a = (T - mg)/m = (3.0^5 N - 1.96^5 N)/ 2.0^4 kg
a=5.20 m/s²
The rocket's initial upward acceleration is 5.2m/s²
According to Newton's second law of motion
[tex]\sum F = ma[/tex]
The sum of forces is the difference between the weight and the thrust
[tex]\sum F = T -W[/tex]
[tex]T - W = ma\\a=\frac{T-W}{a}[/tex]
Given the following parameters:
T = [tex]3.0 \times 10^5 N[/tex]
W = [tex]20,000 \times 9.8 = 1.96 \times 10^5 N[/tex]
m = [tex]20,000kg[/tex]
Substitute the given parameters into the formula to have:
[tex]a=\frac{(3.0-1.96)\times 10^5}{2\times 10^4} \\a=\frac{1.04\times 10^5}{2\times 10^4} \\a = 0.52 \tmes 10\\a = 5.2m/s^2[/tex]
Hence the rocket's initial upward acceleration is 5.2m/s²
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Nylon is a “big” covalent molecule used to make backpacks. Which property of covalent compounds is most useful in making backpacks?
If the coefficient of kinetic friction is 0.500, what was the object's speed as you released it?
In the winter sport of curling, players give a 20 kg stone a push across a sheet of ice. the stone moves approximately 40 m before coming to rest. the final position of the stone, in principle, only depends on the initial speed at which it is launched and the force of friction between the ice and the stone, but team members can use brooms to sweep the ice in front of the stone to adjust its speed and trajectory a bit; they must do this without touching the stone. judicious sweeping can lengthen the travel of the stone by 3 m.
From Newton’s law of motion, the relation for velocity, acceleration and displacement is given by v^2 = vo^2 + 2as. Where v and vo are final and initial velocity respectively, and a, s are the acceleration and displacement respectively. From Newton’s second law, F = ma. Where m is the mass.
The magnitude of the frictional fore can be calculated only before estimating the ston’s acceleration. The initial speed of stone is mentioned in the problem as 3 m/s. Also, after 40m, the stone will stop. This means that its final speed is 0 m/s and the displacement is 40m.The acceleration of rock is calculated as:
(0 m/s)^2 = (3 m/s)^2 + 2a (40m).
9 m^2/s^2 = -2a(40m)
a= -9m^2/s^2/80m = 0.1 m/s^2.
This means that deceleration will occur and this will stop the stone. Substituting to Newton’s second law of motion,
-F = 20kg * -0.1 m/s^2. Further solve,
F = 20kg * 0.1 m/s^2 = 2N. Hence, the magnitude frictional force is 2N.
In curling, the final position of the stone depends on its initial speed and the force of friction. Team members can use brooms to adjust the stone's speed and trajectory. The force of friction opposes the stone's motion.
Explanation:In the winter sport of curling, the final position of the stone depends on the initial speed at which it is launched and the force of friction between the ice and the stone. Team members can use brooms to sweep the ice, which can adjust the stone's speed and trajectory. By judicious sweeping, they can lengthen the travel of the stone by a few meters. The force of friction between the ice and the stone will oppose the motion of the stone and slow it down.
The initial speed at which the stone is launched will determine how far it travels before coming to rest. If the stone is launched with a higher initial speed, it will travel a farther distance. The force of friction between the ice and the stone will also influence the distance the stone travels. A higher frictional force will cause the stone to slow down more quickly, resulting in a shorter travel distance.
What determines the amount of chemical energy asubstance has
The amount of chemical energy a substance has is determined by its molecular structure and the type of chemical bonds it contains.
1. Molecular Structure:
- The arrangement of atoms within a molecule determines its potential energy content.
- Different substances have varying numbers and arrangements of atoms, leading to differences in chemical energy.
2. Type of Chemical Bonds:
- Chemical energy is stored in the bonds between atoms within molecules.
- The strength and type of chemical bonds, such as covalent bonds, ionic bonds, and hydrogen bonds, dictate the amount of energy stored in the substance.
- Stronger bonds require more energy to break and thus store more chemical energy.
3. Potential Energy:
- Chemical energy represents the potential energy stored within a substance's chemical bonds.
- When chemical bonds are broken during a chemical reaction, the stored energy is released as heat or used to perform work.
4. Examples:
- Substances with complex molecular structures and strong chemical bonds, such as hydrocarbons in fossil fuels, tend to have high chemical energy content.
- Conversely, simpler molecules with weaker bonds, such as gases like hydrogen and oxygen, have lower chemical energy content.
Therefore, the amount of chemical energy a substance possesses is determined by its molecular structure and the type of chemical bonds it contains, with stronger bonds and more complex structures generally correlating with higher chemical energy content.
The complete Question is given below:
What determines the amount of chemical energy a substance has?
Describe what would happen if you rubbed a mineral with a Mohs hardness value of 7 against a mineral with a value of 5?
If a mineral with a Moh's hardness value of 7 is rubbed against the mineral with a value of 5, the mineral with value 5 get scratched with the mineral with hardness value 7.
• A scale of relative mineral hardness invented by German scientist Mohs is known as the Mohs scale of hardness or Mohs scale.
• It is a 10 point scale, with 10 given to mineral diamond as the most hardest mineral, which can scratch the minerals below it, that is, coming below it in the hardness scale.
• The minerals coming in the 7 scale are Quartz, Citrine, Agate, and Amethyst, and the mineral coming in the 5 scale is apatite.
• Thus, when one rubs the mineral with 7 hardness with a mineral with 5 hardness, than the mineral with 5 hardness will easily get scratched as it is less harder to the mineral in the 7 scale.
Thus, the mineral with value 5 get scratched with the mineral with hardness value 7.
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The normal boiling point of cyclohexane is 81.0 ℃. what is the vapor pressure of cyclohexane at 81.0 ℃?
Final answer:
The vapor pressure of cyclohexane at its normal boiling point of 81.0 ℃ is 101.3 kPa.
Explanation:
The question is asking for the vapor pressure of cyclohexane at its normal boiling point of 81.0 ℃. By definition, the normal boiling point of a liquid is the temperature at which its vapor pressure is equal to the external atmospheric pressure at sea level, which is 101.3 kPa (or 1 atmosphere). Therefore, the vapor pressure of cyclohexane at 81.0 ℃ is 101.3 kPa.
An object starts from rest and falls under the influence of gravity. draw graphs of its speed and the distance it has fallen as a function of time from t=0 to t=5s
For an object that is under the pull of only the force of gravity, the motion is called free-fall. The equations that would allow us to calculate for the speed and distance is,
Speed = gt
Where g is the acceleration due to gravity and the t is the time.
For the distance, it is calculated through the equation,
Distance = vt + 1/2gt^2
Where v is the initial velocity and is equal to zero.
The graphs are attached.
Newton's first law of motion states that an object remains at rest unless a(n) ____ force acts on it. a. balanced c. gravitational b. frictional d. unbalanced Please select the best answer from the choice
A satellite revolves around a planet at an altitude equal to the radius of the planet. the force of gravitational interaction between the satellite and the planet is f0. then the satellite is brought back to the surface of the planet. find the new force of gravitational interaction f4. express your answer in terms of f0.
______ interference occurs when two waves overlap and the resulting wave has a larger amplitude.
Answer: The correct answer is constructive interference.
Explanation:
Interference is the phenomenon in which there is superposition of the two waves. Interference are of two types: Constructive interference and Destructive interference.
Constructive interference occurs when the there is a superposition of the two waves. The resulting wave has a large amplitude.
Destructive interference occurs when the there is a superposition of the two waves. The resulting wave has a low amplitude.
Therefore, Constructive interference occurs when two waves overlap and the resulting wave has a larger amplitude.
Answer:
B. Constructive
An airport has runways only 198 m long. a small plane must reach a ground speed of 39 m/s before it can become airborne. what average acceleration must the plane's engines provide if it is to take off safely from its airport? answer in units of m/s 2 .
What is the connection between the liver (organ), UV radiation (sunlight), and bone tissue
A favorable entropy change occurs when δs is positive. what can be said about the order of the system when δs is positive?
A positive entropy change (delta S) indicates that the system has become less ordered, as there is an increase in the number of possible microstates. This is aligned with the Second Law of Thermodynamics, which states that entropy increases in spontaneous processes, leading to greater disorder.
Explanation:When a system undergoes a change and the entropy change (δS) is positive, this implies that the order of the system has decreased. This is because positive entropy reflects an increase in the number of microstates or possible configurations that the system can adopt, leading to a less ordered, more random state. A common example is the melting of a solid into a liquid where the rigid structure of the solid is lost, providing the particles more freedom to move in the liquid state, which translates into an increased entropy.
As per the Second Law of Thermodynamics, for all spontaneous processes in the real world, the change in entropy is positive (dδS > 0), which is consistent with the natural tendency for systems to move towards greater disorder and randomness. This concept is fundamental in predicting the spontaneous direction of chemical and physical processes. For instance, when a liquid freezes into a solid, the process is accompanied by a negative entropy change, signifying increased order in the system.
Final answer:
A positive entropy change (δS > 0) means that the order of the system has decreased, leading to a more disordered and randomized state with more microstates. This is in line with the Second Law of Thermodynamics, which predicts that the entropy of an isolated system tends to increase in spontaneous processes.
Explanation:
When the entropy change (δS) is positive, it indicates that the order of the system has decreased. This is because a positive δS suggests that the number of microstates and, therefore, the randomness of the system has increased. For example, when a solid changes into a liquid, there is an increase in entropy because the liquid state allows the particles more freedom of movement and positioning, leading to a higher number of microstates compared to the solid state. If the process were reversed and the liquid turned into a solid, δS would be negative, signifying a decrease in entropy as the system becomes more ordered.
Furthermore, the Second Law of Thermodynamics asserts that for any spontaneous process, the entropy of an isolated system will increase. This means the system will move towards a state with more microstates or higher disorder. It aligns with the observation that in irreversible processes, entropy tends to increase, indicating a spontaneous change in an isolated system.
In conclusion, a positive entropy change (δS > 0) aligns with the expectation that there are more microstates available in the final state compared to the initial one, resulting in a decrease in the orderliness of the system. The increase in entropy reflects the fundamental tendency for systems to evolve towards states of higher disorder and randomness.
if you push a block across the floor with constant force the block will
The branch of mechanics dealing with the mathematical methods of describing motion is calle
Hd 10180g orbits with a period of 600 days at a distance of 1.4 au from its star. what is the ratio of the star's mass to our sun's mass?
Use the expression -
P²k = a³---(i)
Where P is time in years, a is in AU, k is the function of the Sun's mass and set to unity.
Further, we're looking for
the mass of the new star we have slightly modified Kepler's Third Law. After
all, the inverse of a constant is also a constant. The reason we do it is
because we want an answer in the form of K:1, where K is the mass of the HD 10180
and the mass of the Sun is 1, so k needs to start out on the other side.
Convert 600 days in years = 600/365 = 1.64 years
Put this in the expression mentioned at (i) -
1.64²k = a³
You gave us a = 1.4 AU
1.64²k = 1.4³ ; isolating k
k = 1.4³/1.64²
k = 2.744/2.702 = 1.015
So, the requisite ratio = 1.015 : 1
The ratio of the star's mass to the sun's mass is about 1.02 : 1
[tex]\texttt{ }[/tex]
Further explanationCentripetal Acceleration can be formulated as follows:
[tex]\large {\boxed {a = \frac{ v^2 } { R } }[/tex]
a = Centripetal Acceleration ( m/s² )
v = Tangential Speed of Particle ( m/s )
R = Radius of Circular Motion ( m )
[tex]\texttt{ }[/tex]
Centripetal Force can be formulated as follows:
[tex]\large {\boxed {F = m \frac{ v^2 } { R } }[/tex]
F = Centripetal Force ( m/s² )
m = mass of Particle ( kg )
v = Tangential Speed of Particle ( m/s )
R = Radius of Circular Motion ( m )
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
mass of the sun = M_sun = 1.99 × 10³⁰ kg
radius of the orbit = R = 1.4 AU = 2.094 × 10¹¹ m
Orbital Period of planet = T = 600 days = 600 × 24 × 3600 = 5.184 × 10⁷ seconds
Asked:
mass of the star = M = ?
Solution:
Firstly , we will use this following formula to find the mass of the star:
[tex]F = ma[/tex]
[tex]G \frac{ Mm}{R^2}=m \omega^2 R[/tex]
[tex]G M = \omega^2 R^3[/tex]
[tex]\frac{GM}{R^3} = \omega^2[/tex]
[tex]\omega = \sqrt{ \frac{GM}{R^3}}[/tex]
[tex]\frac{2\pi}{T} = \sqrt{ \frac{GM}{R^3}}[/tex]
[tex]M = \frac{4 \pi^2 R^3}{GT^2}[/tex]
[tex]M = \frac{4 \pi^2 (2.094 \times 10^{11})^3}{6.67 \times 10^{-11} \times (5.184 \times 10^7)^2}[/tex]
[tex]\boxed {M \approx 2.0 \times 10^{30} \texttt{ kg} }[/tex]
[tex]\texttt{ }[/tex]
Next , we will calculate the ratio of the star's mass to the sun's mass as follows:
[tex]M : M_{sun} = (2.0 \times 10^{30}) : (1.99 \times 10^{30})[/tex]
[tex]\boxed{M : M_{sun} \approx 1.02 : 1}[/tex]
[tex]\texttt{ }[/tex]
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Answer detailsGrade: High School
Subject: Physics
Chapter: Circular Motion
\a stone is dropped from the top of a cliff. it hits the ground below after 3.80s. how high is the cliff in meters?
Explain how new discoveries influence contemporary psychological perspectives
Answer:
New discoveries can either provide evidence to support or refute contemporary psychological perspectives, or they can lead to the development of new theories and perspectives.Explanation:
A source emits monochromatic light of wavelength 495 nm in air. when the light passes through a liquid, its wavelength reduces to 434 nm what is the liquid's index of refraction?
a. 1.14
b. 1.49
c. 2.03
d. 1.26
e. 1.33
The liquid's index of refraction is approximately 1.88.
Explanation:To find the index of refraction for the liquid, we can use the formula:
n₁ / n₂ = λ₁ / λ₂
where n₁ and n₂ are the indices of refraction for air and the liquid, respectively, and λ₁ and λ₂ are the wavelengths of light in air and the liquid, respectively.
In this problem, we are given that the wavelength of light in air is 495 nm and the wavelength in the liquid is 434 nm. Plugging in these values, we get:
n₁ / n₂ = 495 nm / 434 nm
n₂ ≈ n₁ * (434 nm / 495 nm)
n₂ ≈ 1 * (434 nm / 495 nm)
n₂ ≈ 0.876
To convert the index of refraction to its decimal form, we add 1, giving us:
n₂ ≈ 0.876 + 1
n₂ ≈ 1.876
The liquid's index of refraction is approximately 1.876, which can be rounded to 1.88.
In order to climb a steep hill on a bicycle, a rider shifts to the lowest gear. The lowest gear has the greatest mechanical advantage because it
The lowest gear on a bicycle provides the greatest mechanical advantage by amplifying the force exerted on the pedals, requiring the rider to pedal more but with less effort per stroke, due to the conservation of energy.
In order to climb a steep hill on a bicycle, a rider shifts to the lowest gear. The lowest gear has the greatest mechanical advantage because it allows the rider to apply a force over a greater distance. When a gear with many teeth drives a gear with fewer teeth, the driven gear spins more times but with a smaller turning force, amplifying the force the rider exerts on the pedals.
However, this means the rider will have to spin the pedals more times to cover the same distance, which is a trade-off.
This concept of mechanical advantage applies to all machines and is governed by the conservation of energy, which states that work input is equal to work output, minus any losses due to inefficiency like friction.
A helicopter is ascending vertically with a speed of 7.00 m/s. at a height of 155 m above the earth, a package is dropped from a window. how much time does it take for the package to reach the ground? [hint: the package's initial speed equals the helicopter's.]
Magnetic field lines curve out from one pole and return to the same pole.
t/f
Answer:
the answer is false
Explanation:
your welcome
A race car is moving with a velocity of 144 kilometers/hour. The driver applies the brakes, and the car comes to a halt in 12.0 seconds. What is the average acceleration of the car during those 12.0 seconds? –12.0 meters/second2
Rosa uses the formula (vi cos)t to do a calculation. Which value is Rosa most likely trying to find? the vertical acceleration of a projectile launched at an angle the vertical acceleration of a projectile launched horizontally the horizontal displacement of a projectile launched at an angle the horizontal displacement of a projectile launched horizontally
If Rosa uses the formula (vi cos)t to do a calculation, then Rosa most likely trying to find the horizontal displacement of a projectile launched at an angle to the horizontal, therefore the correct answer is option C.
What is a projectile motion?It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.
The horizontal component of the velocity during any projectile motion is constant and is given by vicosθ.
Thus, If Rosa uses the formula (vi cos)t to do a calculation, then Rosa most likely trying to find the horizontal displacement of a projectile launched at an angle to the horizontal, therefore the correct answer is option C.
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The position of a 2.75×105n training helicopter under test is given by r⃗ =(0.020m/s3)t3i^+(2.2m/s)tj^−(0.060m/s2)t2k^. part a find the net force on the helicopter at t=5.0s.
The net force on the helicopter at t=5.0s = F = 1.65.10⁴i - 3.3.10³k
Further explanationNewton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object
[tex]\large{\boxed{\bold{a~=~\frac{F}{m} }}}[/tex]
∑F = m. a
F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
While the speed is the first derivative of distance
[tex]\large{\boxed{\bold{V~=~\frac{dr}{dt} }}}[/tex]
While acceleration is the first derivative of the velocity function for t
[tex]\large{\boxed{\bold{a~=~\frac{dv}{dt} }}}[/tex]
It is known that the distance function (r) = (0.020 t³i + 2.2 tj-0.06t²k
Then the speed (v)
[tex]v~=~\frac{dr}{dt}[/tex]
v = 0.06t²i + 2.2j - 0.12tk
Then acceleration (a)
[tex]a~=~\frac{dv}{dt}[/tex]
a = 0.12ti - 0.12k
While :
W = m . g
[tex]m~=~\frac{W}{g}[/tex]
m = 2.75.10⁵ : 10
m = 2.75.10⁴
so net force :
F = m . a
F = 2.75.10⁴ . ( 0.12ti - 0.12k)
for t = 5
F = 2.75.10⁴ . ( 0.12.5i - 0.12k)
F = 2.75.10⁴ (0.6i-0.12k)
F = 1.65.10⁴i - 3.3.10³k
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Keywords : Newton's Law, acceleration, net force
The net force on the helicopter at time [tex]t = 5.0\,{\text{s}}[/tex] is [tex]\fbox{\begin\\\left( {1.68 \times {{10}^4}\,\hat i - 3.36 \times {{10}^3}\,\hat j} \right)\,{\text{N}}\end{minispace}}[/tex].
Further Explanation:
The helicopter moves under the action of the force which changes the position of the helicopter with respect to time according to the following equation.
[tex]\vec{r}=(0.020\text{ m}/\text{s}^3)\text{ t}^3\hat{i}+(2.2\text{ m}/\text{s})\text{ t}^3\hat{j}-(0.060\text{ m}/\text{s}^2)\text{ t}^2\hat{k}[/tex]
The force acting on the helicopter at a particular time is given by:
[tex]\fbox{\begin\\F= m\cdot{a}\end{minispace}}[/tex]
Here, [tex]m[/tex] is the mass of the helicopter and [tex]a[/tex] is the acceleration of helicopter.
The helicopter has a weight of [tex]2.75 \times {10^5}\,{\text{N}}[/tex]. This weight of the helicopter can be converted into the mass of the helicopter.
The weight of the helicopter can be represented as.
[tex]\fbox{\begin\\W=m \cdot g\end{minispace}}[/tex]
Rearrange and simplify the expression for the mass of helicopter.
[tex]\begin{aligned}m&=\frac{W}{g}\\&=\frac{{2.75\times{{10}^5}}}{{9.8}}\,{\text{kg}}\\&=2.{\text{80}}\times{\text{1}}{{\text{0}}^4}\,{\text{kg}}\\\end{aligned}[/tex]
The velocity of the helicopter can be determined by the differentiation of the position vector of the helicopter with respect to time.
[tex]\begin{aligned}\vec{v}&=\dfrac{{d\vec{r}}}{{dt}}\\&=\dfrac{d}{{dt}}\ [(0.020\text{ m}/\text{s}^3)\text{ t}^3\hat{i}+(2.2\text{ m}/\text{s})\text{ t}^3\hat{j}-(0.060\text{ m}/\text{s}^2)\text{ t}^2\hat{k}]\\&=0.060{t^2}\hat{i}+2.2\hat{j}-0.12t\hat{k}\end{aligned}[/tex]
The acceleration of the helicopter is the derivative of the velocity with respect to the time.
[tex]\begin{aligned}\vec a&=\frac{{d\vec v}}{{dt}}\\&=\frac{d}{{dt}}\left({0.060{t^2}\hat i+2.2\hat j-0.12t\hat k}\right)\\&=0.12t\hat i-0.12\hat k\\\end{aligned}[/tex]
Substitute the value of [tex]t = 5.0\,{\text{s}}[/tex] in equation of the acceleration.
[tex]\begin{aligned}a&=0.12\left({5.0}\right)\hat i-0.12\hat k\\&=0.6\hat i-0.12\hat k\\\end{aligned}[/tex]
Substitute the values of the acceleration and the mass of the helicopter in the equation of force.
[tex]\begin{aligned}F&=\left( {2.80\times{{10}^4}\,{\text{kg}}}\right)\left({0.6\hat i-0.12\hat k}\right) \\&=\left({1.68\times{{10}^4}\,\hat i-3.36\times{{10}^3}\,\hat j}\right)\,{\text{N}}\\\end{aligned}[/tex]
Thus, the net force acting on the helicopter at time [tex]t = 5\,{\text{s}}[/tex] is [tex]\fbox{\begin\\\left( {1.68 \times {{10}^4}\,\hat i - 3.36 \times {{10}^3}\,\hat j} \right)\,{\text{N}}\end{minispace}}[/tex].
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Answer Details:
Grade: College
Subject: Physics
Chapter: Force and acceleration
Keywords:
Helicopter, force, time, 5s, position, velocity, derivative, acceleration, weight, net force, t=5s, 0.020t3 m/s3, 2.75x10^5 N, helicopter under test, gravity, mass of helicopter.
If f = 136 lb , determine the resultant couple moment.
Which are the components of a typical refracting telescope? hints?
The components of a typical refracting telescope are basically convex object and convex eyepiece. The correct option is 1.
A typical refracting telescope is made up of a series of convex lenses. The objective lens is a convex lens positioned at the front of the telescope that collects and focuses light from distant objects. At the focus point, it creates an inverted actual picture.
The eyepiece, which is located at the telescope's back end, is likewise a convex lens. Its goal is to amplify the picture created by the objective lens so that the viewer may see a bigger, upright, magnified image.
In a standard refracting telescope, the correct combination is a convex objective lens and a convex eyepiece.
Thus, the correct option is 1.
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Your question seems incomplete, the probable complete question is:
Which are the components of a typical refracting telescope?
1.convex object and convex eyepiece
2. concave object and convex eyepiece
3. convex object and concave eyepiece
A car goes from 40n/s to 60 m/s in 8s the acceleration of the car is
A person's height and weight will change gradually, while other things, such as getting a driver's license, may occur suddenly and mark the beginning of a new phase in life. This difference is an example of the theme of development known as:
Answer:
Continuity vs. Stages
Explanation:
Continuity is the gradual changes that a person may experiment throught their life, good examples are the ones given in the question, height and weght increasing or changing over time, but stages start whenever something happens that changes the way of life of the person, for example graduating college and going into the labor force, or getting married.