The angular resolution of a ground-based telescope is usually determined by:
Answers
For telescopes in general, ever since they were invented, it's the size of the objective lens (in the front) or mirror (in the back).
For the most hugest humongous telescopes, built in the past few decades, it's limited by the turbulence of the atmosphere. That's the main reason we started building the big ones on mountain tops and in deserts, and lately we've started putting them in Earth orbit, where they don't have to look through any air at all.
Related Questions
For a relative frequency distribution, relative frequency is computed is computed as ____________.
Answers
Answer:
For a relative frequency distribution, relative frequency is computed as the class frequency divided by the number of observations.
Select all the correct answers.
An unmanned spacecraft leaves for Venus. Which statements about the spacecraft's journey are true?
O
The weight of the spacecraft keeps changing.
The mass of the spacecraft keeps changing.
The weight of the spacecraft remains the same.
The mass of the spacecraft remains the same.
The gravitational pull on the spacecraft remains the same.
Answers
An unmanned spacecraft leaves for Venus. The statements, The weight of the spacecraft keeps changing and The mass of the spacecraft remains the same. This 2 statements A and D are true.
What is Spacecraft ?A spaceship is a machine or vehicle built to travel through space. Spacecraft are a form of artificial satellite utilised for a wide range of tasks, such as communications, Earth observation, meteorology, navigation, space colonisation, planetary exploration, and freight and person transfer. All spacecraft, with the exception of single-stage-to-orbit vehicles, need a launch vehicle (carrier rocket) to get into space.
A spacecraft that is performing a sub-orbital spaceflight launches into space and then lands without gaining enough momentum or energy to complete a full orbit of the Earth. Spacecraft enter confined orbits around the Earth or other celestial bodies for orbital spaceflights. Only humans are carried on human spacecraft either as crew or guests from launch or while in orbit (space stations).
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Un auto recorre una carretera en línea recta de 10km y tarda 8 minutos ¿Cual es su velocidad en km/h?
Answers
20,83 m / s (metros por segundo)
divide 10 metros entre 8 minutos y obtén 20.83333333
20.83 m/s (meters per second)
divide 10 meters by 8 minutes and get 20.83333333
Fill in the blanks….
Answers
Answer:
An object is considered to be accelerating if the object is changing its rate in speed, decreases in speed, or changes the object's direction
a man weighs 600 n while on the surface of earth. if he is transported to the planet mythos, which has the same mass as earth but a radius that is five times larger than earth's, his weight would be group of answer choices
Answers
Human body weight is equal to 600 N. Gravitational acceleration on earth: g = 10 m s 2 Man's weight on Earth is 600 kg. 10 sq . ft = 60 kg Since mass is consistent everywhere, we are aware of this.
What does gravity mean?
The attraction of items by the earth is known as gravitation. The earth's gravity causes objects that are hurled upward to reach a specific height before falling to the ground. 2. Space objects may be drawn to one another by gravity. the attraction force between the sun and the other planets.
Gravitational interaction: What is it?
The weakest of the four basic forces of nature, attraction between physical things having mass or energy is a natural phenomena. also known as gravity. the process or act of moving while being drawn to something. check out gravitational interaction. a movement in the direction of a source of desire: the middle classes' attraction.
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what minimum speed does a 200 g puck need to make it to the top of a frictionless ramp that is 3.2 m long and inclined at 20 ∘ ?
Answers
The minimum speed that a 200 g puck needs to make it to the top of a frictionless ramp that is 3.2 m long and inclined at 20∘ is 4.64 m/s.
To find the minimum speed a 200 g puck needs to make it to the top of a frictionless ramp that is 3.2 m long and inclined at 20°, follow these steps:
Convert the mass of the puck to kilograms, 200 g = 0.2 kg
Calculate the gravitational potential energy (PE) at the top of the ramp;
PE = mgh, where m is mass, g is the gravitational constant (9.81 m/s²), and h is the height of the ramp.
To find the height (h), use the sine function;
h = sin(θ) × length of the ramp, where θ is the angle of inclination. So, h = sin(20°) × 3.2 m ≈ 1.099 m.
Now, calculate the gravitational potential energy;
PE = 0.2 kg × 9.81 m/s² × 1.099 m ≈ 2.153 J (joules).
Since the ramp is frictionless, the initial kinetic energy (KE) must equal the gravitational potential energy at the top of the ramp;
KE = 0.5mv², where m is mass and v is velocity.
Solve for v;
2.153 J = 0.5 × 0.2 kg × v²
Rearrange the equation and solve for v;
v² = (2.153 J) / (0.1 kg) ≈ 21.53
Then take the square root: v ≈ √21.53 ≈ 4.64 m/s.
So, the minimum speed the puck needs to make it to the top of the frictionless ramp is approximately 4.64 m/s.
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How does the electric field intensity vary with the increase of distance of the point from the centre of a charged conducting sphere? Explain with graph.
Answers
Answer:
(i) Electric field outside the shell:
For point r>R; draw a spherical gaussian surface of radius r.
Using gauss law, ∮E.ds=q0qend
Since E is perpendicular to gaussian surface, angle betwee E is 0.
Also E being constant, can be taken out of integral.
So, E(4πr2)=q0q
So, E=4πε01r2q
Milk is a very weak acid. What might its pH value be ?
Answers
Answer:
pH value is between 6.5 and 6.8
Explanation:
Explanation:
Milk fresh from the cow typically has a pH between 6.5 and 6.7. The pH of milk changes over
Which of the following has zeros that are not significant?
2.05 m/s
10.0 J
1.30 N
100 kg
Answers
Answer: Either 10.0 J or 1.30 N
Explanation:
10.0 J
if it was 10.01 it would be significant, but its 10.0 which makes it a whole number
1.30 N
All zero's preceding the first integers are never significant. For example: 0.0078 has two significant figures. All zero's after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures
Answer:
100 kg
Explanation:
With the absence of a decimal point, only the 1 would be significant.
What are the reactants in the reaction? What are their properties?
Answers
In a reaction, reactants are the substances on which the reaction takes place. The reactants undergo changes to form the products.
In any reaction, the atoms of the reactants and the products are the sameThe only difference is the way these atoms are bound to each other through chemical bondsDuring the reaction, there is a rearrangement of the atomsConsider the following reaction:
C + O₂ ---> CO₂
In the above reaction, carbon and oxygen are the reactantsWe can see that the atoms on both sides of the reaction are the same, the only difference is the way they are bondedCarbon undergoes combustion and reacts with oxygen gas to form carbon dioxide gasLearn more about chemical reactions here:
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HELP ME PLEASE If an object is placed under a force of 20 N, it accelerates at a rate of 5 m/s^2. If the force is increased to 55 N, what is the new acceleration? a 13.75 kg b 7.25 kg c 21.10 kg d 5.65 kg
Answers
Answer:
b
Explanation:
Answer:13.75
Explanation:
During the Battle of Bunker Hill, it is commonly thought that the commanders gave the order "Don't shoot until you see the whites of their eyes!" to make sure the British troops were close enough that a hit was a certainty.s = 2.5 cmD = 4.9 mm1. If take your commander's instructions literally and don't fire until the whites of the enemy's eyes are just resolvable by your pupil, how far away (in meters) are they when you open fire? Assume your target has an eye which is 2.5 cm across, the diameter of your pupil is 4.9 mm, and you are observing at a wavelength of 555 nm.
Answers
The distance to open fire, based on the given parameters, is approximately 267 meters.
What is distance?
Distance is a scalar quantity that refers to the extent of space between two points or objects. It is a measurement of how far apart two locations or objects are from each other.
To calculate the distance at which the enemy's eyes are just resolvable by your pupil, we can use the concept of angular resolution. The formula for angular resolution is:
θ = 1.22 * (λ / D)
In this case, the diameter of the target's eye (s) is given as 2.5 cm, which is equivalent to 0.025 m. The diameter of the pupil (D) is given as 4.9 mm, which is equivalent to 0.0049 m. The wavelength of light (λ) is given as 555 nm, which is equivalent to 555 × 10⁻⁹ m.
Substituting these values into the formula, we can solve for the angular resolution (θ). Once we have the angular resolution, we can use basic trigonometry to calculate the distance (d) at which the target is located:
d = (s / 2) / tan(θ)
By plugging in the values, we find that the distance at which the target is when you open fire is approximately 267 meters.
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During the annual shuffleboard competition, Renee gives her puck an initial speed of 9.32 m/s. Once leaving her stick, the puck slows down at a rate of -4.06 m/s2. Determine the time it takes the puck to slow to a stop.
Answers
Answer:
40
Explanation:
because of the force acting on it
to increase total utility without increasing spending, should skeeter change the amount of consumption of either good?
Answers
To increase total utility without increasing spending, Skeeter must adjust his consumption of either good, as it is impossible to do so otherwise. The law of diminishing marginal utility states that the more one consumes a good, the less satisfaction (utility) one derives from each additional unit consumed.
To increase total utility without increasing spending, Skeeter must adjust his consumption of either good, as it is impossible to do so otherwise. The law of diminishing marginal utility states that the more one consumes a good, the less satisfaction (utility) one derives from each additional unit consumed. This implies that for both goods consumed, the more one consumes, the less satisfaction he or she derives from each additional unit. If Skeeter consumes more of one good and less of the other, he may be able to achieve higher overall utility levels. Let's take an example: Suppose Skeeter is consuming two goods, pizza and ice cream.
Suppose he is presently consuming three slices of pizza and two scoops of ice cream, and his total utility level is 18. Skeeter might want to adjust his consumption by eating four slices of pizza and one scoop of ice cream, increasing his total utility level to 22, without increasing his spending. This approach would allow Skeeter to optimize his utility by consuming pizza and ice cream in the most efficient manner feasible. In conclusion, to increase total utility without increasing spending, Skeeter must adjust his consumption of either good.
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Recall what you learned about the state of Virginia. Choose the statements that describe the paleontology of the state. Check all that apply.
The rocks in Virginia represent many periods in history.
Virginia was once covered by a sea.
Virginia’s fossils include woolly mammoths.
The Allegheny Plateau includes coal deposits.
Virginia is home to fossils that are mostly from the Cenozoic era.
The state’s climate was once warm and humid, like a tropical jungle..
Answers
Virginia is officially called as Commonwealth of Virginia. It is a state in the Mid-Atlantic and South-eastern regions of the United States between the Atlantic Coast and the Appalachian Mountains.
What do you mean by the term Commonwealth?Commonwealth countries just like other countries have independent Foreign policies, Defence policies, or political policies. They put themself in the commonwealth because in past they are the colony of any other country. But the country can leave the commonwealth group.
The statement that describes the paleontology of the states are :
a. variety of historical eras are represented by the rocks in Virginia.
b. A sea once engulfed Virginia.
c. The Allegheny Plateau includes coal deposits.
d. In the past, the state's weather was warm and muggy, resembling a tropical rainforest.
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What happens to the cost of goods when inflation increases?
OA. The cost of goods decreases.
B. The cost of goods increases.
OC. The cost of goods stays the same.
OD. The cost of goods varies.
Answers
Answer:
The answer is B
Explanation:
Generally speaking, a company selling goods during periods of inflation will see an increase in its cost of goods sold.When inflation increases, the cost of goods increases. The correct option is B.
Generally speaking, inflation raises the price of products sold. The price of producing and purchasing those things rises together with the prices of goods and services owing to inflation.
This can be attributable to elements like escalating manufacturing costs, rising input costs, and shifting dynamics of supply and demand.
As a result, companies might need to modify their pricing plans to take inflation-related cost increases into account, the cost of goods typically increases when inflation occurs.
Thus, the correct option is B.
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Which two statements are true about this chemical reaction that forms acid rain?
Answers
Statement that is true about chemical reaction that forms acid rain : b)The bonds that break are between N and O in HNO2and between O and H in HNO3.
What is acid rain?Acid rain is a acid deposition, which refers to the many ways in which acidity can move from atmosphere to Earth's surface. Acid deposition includes acidic rain as well as other forms of acidic wet deposition such as snow, sleet, hail, and fog.
HNO2 is less stable thus dissociates easily to HNO3 + NO + H2O and HNO3 is a strong acid. Therefore, when they react with H2O, they form acid rain.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: Which two statements are true about this chemical reaction that forms acid rain? 2NO2 + H2O--> HNO2 +HNO3
a) The bonds that form are between N and O in HNO2 between and between O and H in HNO3.
b)The bonds that break are between N and O in HNO2and between O and H in HNO3.
c)The bonds that break are between N and O in NO2 and between O and H in H2O.
d)The bonds that form are between N and O in NO2 and between O and H in H2O.
Answer: The correct two answers are :
1.) The BONDS that FORM are between N and O in HNO 2 and between O and H in HNO 3
2.) The BONDS that BREAK are between N and O in NO2 and between H and O in H2O
Explanation: I took the test.
Please help quick
LaToya uses 50 newtons (N) of force to pull a 500 N cart. Which statements are correct about calculating LaToya's mechanical advantage? Select all that apply
A The input force is 50 N
B
The output force is 50N
с
The input force is 500 N
D
The output force is 450 N
E
The mechanical advantage is 10
F
The mechanical advantage is 100
Answers
F=ma
Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration. We use Newtons, kilograms, and meters per second squared as our default units, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour per second, millimeters per second2, etc.) could certainly be used as well - the calculation is the same regardless.
The statements which are correct about calculating LaToya's mechanical advantage are—The input force is 50 N, the output force is 450 N and the mechanical advantage is 10.Therefore, the correct option is A, D and E.
What is mechanical advantage?Mechanical advantage is the ratio of output force to input force. In this case, LaToya is using a force of 50 N to pull a cart that weighs 500 N. The output force is the weight of the cart minus the force LaToya exerts on it:
Output force = 500 N- 50 N = 450 N
To see why statement F is incorrect, note that the formula for mechanical advantage is:
Mechanical advantage = output force / input force
Substituting the values we found earlier, we get:
Mechanical advantage = 450 N / 50 N = 9
So the mechanical advantage is actually 9, not 100.
Therefore, the correct option is A, D and E.
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The diagram is a real world example of the first and second laws of thermodynamics. It shows how thermal energy is used to generate electricity. Which best describes how the diagram illustrates both laws of thermodynamics?
Answers
Answer:
First law: kinetic energy is used to turn an electric generator
Second law: some thermal energy is lost to the environment as it travels through the system
Explanation:
The first law of thermodynamics is known as the law of conservation of energy. It states that energy can neither be created nor destroyed but can only be transferred or changed from one form to another. When thermal energy is used to generate electricity, the kinetic energy of the steam is used to turn the electric generator (thereby producing electrical energy).
The second law of thermodynamics states that energy transfer or transformation leads to an increase in entropy resulting in the loss of energy. This law also states that as energy is transferred or transformed, some is lost in a form that is unusable. When thermal energy is used to generate electricity, some of the thermal energy is lost to the environment as it travels through the system.
Answer:
NOT A
Explanation:
Sorry I couldn't guess it right. Source EDGEN
Think about what happens to the volume of an air-filled balloon on top of water and beneath the water. Then rank the buoyant forces on a weighted balloon in water, from greatest to least, when it is:
a. barely floating with its top at the surface
b. pushed 1 m beneath the surface
c. pushed 2 m beneath the surface
Answers
The ranking of the buoyant forces on the weighted balloon in water, from greatest to least, is as follows:
c. Pushed 2 m beneath the surface (highest buoyant force)
b. Pushed 1 m beneath the surface
a. Barely floating with its top at the surface (lowest buoyant force)
Let's consider the scenarios mentioned and rank the buoyant forces on a weighted balloon in water from greatest to least:
a. Barely floating with its top at the surface:
In this scenario, the balloon is floating at the water's surface, with only a small portion of the balloon submerged. The buoyant force is equal to the weight of the water displaced by the submerged portion of the balloon, which is relatively small. The top part of the balloon is exposed to air, so it doesn't contribute to buoyancy. The buoyant force in this case is relatively low.
b. Pushed 1 m beneath the surface:
When the balloon is pushed 1 meter beneath the surface, more of the balloon becomes submerged. As the depth increases, the volume of water displaced by the balloon also increases. The buoyant force on the balloon becomes greater than in scenario (a), as a larger volume of water is displaced by the balloon. Therefore, the buoyant force in this case is higher than in scenario (a).
c. Pushed 2 m beneath the surface:
When the balloon is pushed 2 meters beneath the surface, even more of the balloon becomes submerged, displacing an even larger volume of water. The buoyant force further increases compared to scenarios (a) and (b) because a greater volume of water is displaced by the balloon. Therefore, the buoyant force in this case is the highest among the three scenarios.
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1. Do you think your memories can be altered? Explain
Answers
Answer:
Yes
Explanation:
I think our memories can be altered by emotions. If someone tells you something over and over and over again with strong emotion you will start to remember that more than the memory.
Emotions are very powerful and if you feel a certain emotion connected with a different memory I think that is stronger and can trick your brain into thinking that is the memory because of the strong emotion, even though the true memory was right, since it might not have as strong of mental emotion your brain will think that is the false memory because whatever is more memorable your brain will remember.
If that makes any sense,
An ice cube at a temperature of 0 °C is put into a drink at a temperature of 10 °C.
After a short time, some of the ice has melted and the drink has cooled to a temperature of 8 °C.
What is the temperature of the remaining ice?
ABCD
O 0°C
O 2 °C
O 4 °C
O 8°C
Answers
Answer:
p
Explanation:
bec
The heat lost by the water is equal to the heat gained by the ice to melt. The initial temperature of water is 10°C and it lost 2°C to ice. Therefore, the temperature of the remaining ice will be 2 °C.
What is heat transfer ?Heat will transfer from one area to the other over a temperature gradient. Heat transfers from hotter bodies to colder bodies until both are getting in same temperature.
According to law of conservation of energy, any form of energy can neither be created nor be destroyed. Hence the total energy is conserved always. The heat lost by a body is equal to the heat gained by other body in contact.
Here, the temperature of water reduced from 10 °C to 8 °C. This loss in heat energy is equal to the heat gained by the ice for melting. Therefore, the temperature of the remaining ice is 2°C.
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How can Newton's third law describe the forces affecting a rocket as it
descends to Earth's surface?
Answers
Answer:
His third law states that for every action (force) in nature there is an equal and opposite reaction. In re-action, a thrusting force is produced on the engine mount. The thrust accelerates the rocket as described by Newton's second law of motion.
Explanation:
Answer:
The force the rocket exerts on the air is in the direction opposite to
the force that the air exerts on the rocket.
Explanation:
The pitch of a sound you hear depends on the------------------ of the sound wave.The pitch of a sound you hear depends on the------------------ of the sound wave.
Answers
Answer:
Frequency.
Explanation:
Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.
Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.
Mathematically, the speed of a sound is given by the formula:
Speed = wavelength * frequency
The pitch of a sound you hear depends on the frequency of the sound wave.
Answer:Frequency.
Explanation:Sound are mechanical waves that are highly dependent on matter for their propagation and transmission. Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.Mathematically, the speed of a sound is given by the formula:Speed = wavelength * frequency
Two blocks, joined by a string, have masses of 6.0 and 9.0 kg. They rest on a frictionless horizontal surface. A 2nd string, attached only to the 9 kg block, has horizontal force = 30 Newtons applies to it. Both blocks accelerate. Find the tension (Force) in the string between the blocks.
Answers
Hi there!
We can begin by calculating the acceleration of the system:
∑F = ma
m = sum of the mass of both blocks
Solve for acceleration:
∑F/m = a
30/(6 + 9) = 2 m/s²
On the 6 kg block, the tension is equivalent to the net force:
∑F = T
Since we know that the 6kg is accelerating at 2 m/s², we can solve for tension:
∑F = T = ma
T = 6 · 2 = 12 N
multiple choice
15) A coiled spring used to help a door close has ________ ________energy when the door is open.
16) After braking, a bicycle's tires increase in temperature as friction causes some of the
mechanical energy to transfer to ________ energy.
Answers
According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.
Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.
The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .
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Light is sometimes described as a wave and sometimes as a particle. Give evidence to support the wave nature of light.
Answers
Answer:
there are some ups and downs in life and particle is describing it as a result of happiness
what is momentum of 1.5 kg boulder dropped from a cliff after 3.0 s
Answers
Given :
Mass of object, m = 1.5 kg.
To Find :
The momentum of boulder dropped from a cliff after 3 seconds.
Solution :
Speed of boulder after 3 seconds of free fall is given by :
v = u + gt ( Equation of motion )
v = 0 + 10×3 ( g = acceleration due to gravity )
v = 30 m/s
Now, momentum is given by :
P = m × v
P = 1.5 kg × 30 m/s
P = 45 kg m/s
Therefore, momentum of boulder is 45 kg m/s.
A car initially traveling at 15.0 m/s accelerates at a constant rate of 4.50 m/s2 over a distance of 45.0 m. how long does it take the car to cover this distance? (4 points)
Answers
A car initially traveling at 15.0 m/s accelerates at a constant rate of 4.50 m/s2 over a distance of 45.0 m, the time taken to cover this distance is mathematically given as
t = 2.24 s
What is the time taken to cover this distance?Generally, the equation for Kinematic relation is mathematically given as
S = ut + (1/2)at^2
Therefore
45 = 15t + 2.25 t^2
2.25 t^2 + 15 t -45 = 0
t = 2.24 s
In conclusion, the time is taken to cover this distance
t = 2.24 s
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What happens when a proton is placed directly in the path of the proton cannon?
Answers
Answer:
Proton is positively charged and is thus, attracted to the negative plate. Hence, it will take the path D after leaving the region between the charged plates.When a proton is placed directly in the path of the proton cannon, it will experience a strong electromagnetic force. The proton cannon emits a beam of protons at high energy and velocity. When the proton in the path of the cannon interacts with the beam, there will be a collision between the two protons.
During the collision, the protons may undergo a process called scattering, where they change direction and momentum. The exact outcome of the collision depends on the energy and angle of the incoming proton, as well as the properties of the target proton. It is possible that the protons may scatter off each other, transferring energy and momentum in the process.
In some cases, the collision may result in the absorption of the incoming proton by the target proton. This can lead to the formation of a more massive particle or the emission of other particles. The specifics of the interaction will depend on the energy and conditions of the proton cannon and the characteristics of the protons involved.
Overall, placing a proton directly in the path of a proton cannon will result in a collision and potential scattering or absorption of the protons, causing changes in their momentum and possibly leading to the creation of other particles.
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