The magnification of the microscope (m1) is 0.5. To calculate the magnification of the microscope, we can use the formula:
Magnification (m1) = (focal length of the objective lens) / (focal length of the eyepiece)
Given that the focal length of the objective lens is 75 mm and the focal length of the eyepiece is 150 mm, we can substitute these values into the formula: m1 = 75 mm / 150 mm, m1 = 0.5
Therefore, the magnification of the microscope (m1) is 0.5.
The magnification of 0.5 means that the image seen through the microscope appears half the size of the actual object. So, objects viewed through this microscope will appear magnified, but not significantly so.
The accommodation of 250 mm is not directly used in calculating the magnification but may affect the viewer's ability to focus and perceive the magnified image clearly.
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You have a cup full of water and a bathtub full of water. Both samples of water have a temperature of 30°C. Which sample has greater amount of heat?
Answer:
temperature is -10
Explanation:
If Anthony was running for 300 s after starting at rest, what was his final velocity if he
had an acceleration of 0.05 m/s2?
.25 m/s
.01 m/s
100 m/s
15 m/s
Answer:
final velocity, v, is 15 m/s
Explanation:
a = a
v = a*t + v_o
x = 0.5*a*t^2 + v_o*t + x_o
t = 300 s
a = 0.05 m/s2
v_o = 0 m/s
x_o = 0 m
v = (0.05 m/s2)*(300 s) + 0 m/s
v = 15 m/s
hat is the difference in the heights of the two liquid surfaces? the density of heavy liquid is 1000 kg/m
The difference in the heights of the two liquid surfaces is 5.137cm.
Lets assume that a simple U-tube that is open at both ends is partially filled by heavy liquid of density 1000 kg/m³ and liquid of density 533kg/m³ is then poured into one arm of the tube, resulting or expanding a column 11 cm.
Equations that can resolve the height difference using the densities is given as below:-
\(P + (l-h)\alpha g= P+l\beta g\\\\h=l (1- \beta /\alpha )\)
Now substituting l= 11 cm , α=1000kg/m³ and β= 533kg/m³
h= 11(1-533/1000)
h=5.137cm
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You work in a materials testing lab and your boss tells you to increase the temperature of a sample by 34.1 C. The only thermometer you can find at your workbench reads in degrees Fahrenheit. Part A If the initial temperature of the sample is 62.4 °F, what is its temperature in degrees Fahrenheit when the desired temperature increase has been achieved? Express your answer in degrees Fahrenheit to three significant figures.
The final temperature of the sample in degrees Fahrenheit when the desired temperature increase has been achieved is `123.78°F.`
The initial temperature of the sample is 62.4 °F. The boss instructs us to raise the temperature by 34.1°C. We need to determine the final temperature of the sample. Here's how we can do it.
Step 1: Use the conversion formula for Celsius to Fahrenheit.
C = (F - 32) x 5/9F = (C x 9/5) + 32where C is the temperature in Celsius and F is the temperature in Fahrenheit.
Step 2: Convert the initial temperature of the sample from Fahrenheit to Celsius.
C = (F - 32) x 5/9`C = (62.4 - 32) x 5/9``C = 16.89`°C The initial temperature of the sample is 16.89°C.Step 3: Add 34.1°C to the initial temperature of the sample to obtain the final temperature in Celsius. Final temperature in Celsius = 16.89 + 34.1``Final temperature in Celsius = 50.99`°CStep 4: Convert the final temperature in Celsius to Fahrenheit.
F = (C x 9/5) + 32`F
= (50.99 x 9/5) + 32`F
= 123.78`°F
Therefore, the final temperature of the sample in degrees Fahrenheit when the desired temperature increase has been achieved is `123.78°F.`
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The Nernst Equlibrium Potential:
A. represents the voltage that offsets the chemical energy set up by ATP-dependent pumps
B. is the threshold voltage that increases conductance for that ion
C. Is the potential energy (in mV) when an ion is in electrical equilibrium
D. for sodium is close to the resting membrane potential
The Nernst Equilibrium Potential is the potential energy (in mV) when an ion is in electrical equilibrium. The correct option is C.
What is the Nernst equilibrium potential?The Nernst equilibrium potential is a theoretical membrane potential at which the electrical gradient of an ion is precisely counterbalanced by the opposing chemical gradient. For the ion, this means that there is no net flux of the ion through the membrane, and it is at equilibrium.
As a result, this concept defines the voltage at which ion movement would be equal if there were no other forces opposing the movement. For a single ion, the Nernst equilibrium potential may be computed utilizing the following formula:
E ion = (RT/zF) * ln([ion]outside/[ion]inside)
where E ion represents the Nernst equilibrium potential for an ion, R is the gas constant, T is temperature (in Kelvin), z is the charge of the ion, F is Faraday's constant, and [ion]outside/[ion]inside represents the ion concentration ratio outside/inside the cell.
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Which situation describes the best example of rotational motion?
A. Craig sent the pool ball spinning toward the side pocket.
B. The skater repeated the figure eight on the ice.
C. Sara spun the dreidel on its pointed end.
D. The mouse ran in circles around the mousetrap.
yeah i kinda need help ;w;
The answer is C
! I took the test lol :)
The rotation is a circulatory motion of an object around the axis and maybe for infinite time and pass internally by the body's own center of mass then the body is said to be spinning.
Revolution is used synonym for rotation. Such as planet earth rotates around the sun on its axis. Another example of this motion can be that of dreidel spinning on its pointed edge.Hence option C is correct.
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Of elements in the same group, those at the top of the periodic table have
higher ionization energies because
A. fewer layers of electron shells create less shielding of the
protons' attractive force
B. these elements are high in electronegativity
C. they have fewer electron shells to shield the protons from the
electrons
D. their atomic radius is small
Answer:
The correct answer is C. they have fewer electron shells to shield the protons from the electrons.
Ionization energy is the energy required to remove an electron from an atom or ion in the gaseous state. Elements in the same group of the periodic table have the same number of valence electrons, which are the outermost electrons involved in chemical bonding. However, as we move up the group, the ionization energy increases. This is because the elements at the top of the group have fewer electron shells, which means that the valence electrons are closer to the nucleus and experience a stronger attraction to the protons in the nucleus.
The valence electrons are shielded from the attractive force of the protons by the inner electrons in the atom. Therefore, as we move down the group, the increasing number of electron shells provides more shielding and reduces the effective nuclear charge experienced by the valence electrons. This makes it easier to remove an electron from the outer shell, resulting in a lower ionization energy.
Therefore, elements at the top of the periodic table have higher ionization energies because they have fewer electron shells to shield the protons from the electrons. This results in a stronger attraction between the valence electrons and the nucleus, making it more difficult to remove an electron from the outer shell.
Option A is incorrect because fewer layers of electron shells actually mean less shielding, which leads to a higher ionization energy. Option B is incorrect because electronegativity is a measure of an atom's ability to attract electrons, not its ionization energy. Option D is incorrect because atomic radius also affects ionization energy, but it is not the primary reason why ionization energy increases up a group.
The tip of second's hand of a clock take 60 seconds to to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the second's hand of the clock.
Answer:
( About ) 1.1 cm / s
Explanation:
We know that the time it takes the clock's second hand to move is 60 seconds. Respectively the radius of this clock is given to be 10.5 centimeters.
_______________________________________________________
Let us apply the formula speed = distance traveled / time. Here the " distance traveled " is the circumference of the clock, or 2πr - where we can pose π as 3.14. In other words, Speed = 2πr / time. Substitute known values to solve for the Speed,
S = 2 * 3.14 * 10.5 / 60,
Speed = ( About ) 1.1 cm / s
Hope that helps!
the speed of the light in air is 3*10^8m/s.and the speed of the light in water is 2.26*10^8m/s.find refractive index of water
Answer:
Explanation:The refractive index of a medium is the ratio of the speed of light in vacuum or air to the speed of light in that medium. In this case, we can calculate the refractive index of water as follows:
Refractive index of water = Speed of light in air / Speed of light in water
Refractive index of water = 3 x 10^8 m/s / 2.26 x 10^8 m/s
Refractive index of water = 1.33 (rounded to two decimal places)
Therefore, the refractive index of water is approximately 1.33.
Pleas answer if you want brainliest I need help fast
Nolan is making a capacitor using plates that have an area of 3.2 × 10–4 m2 separated by a distance of 0.20 mm. He has the two dielectrics listed in the table.
table:
dielectirc 1= dielectric constant 6.8
dielectric 2= dielectric constant 1.5
At a voltage of 1.5 V, how much more charge can Nolan store in the capacitor using dielectric 1 than he could store using dielectric 2?
answer choices:
7.5 × 10^–11 C
9.6 × 10^–11 C
1.1 × 10^–10 C
1.4 × 10^–10 C
Answer: 1.1 x 10^-10 C
Explanation:
Answer:
1.1 x 10^-10 C
Explanation:
on edg 21
A dart with a mass of 0.5kg is thrown at 15m/s and sticks into a 1kg apple hanging
on a string. What is the total momentum of the objects before the collision?
Answer:
Before the collision:
m v1 = .5 kg * 15 m/s = 7.5 kg-m/s
Incidentally, after the collision
(M + m) v2 = 7.5
v2 = 7.5 / (1 + .5) = 5 m/s
How do I calculate final speed
Answer:
Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v.
Explanation:
A block is pushed against the spring with spring constant 15 kN/m (located on the lefthand side of the track) and compresses the spring a distance 5 cm from its equilibrium position (as shown in the figure below). The block starts at rest, is accelerated by the compressed spring, and slides across a frictionless track (as shown in the figure below). It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9.81 m/s
a) What is the speed v of the block when it
leaves the track?
Answer in units of m/s.
b) What is the horizontal distance x the block
travels in the air?
Answer in units of m
c) What is the total speed of the block when it
hits the ground?
Answer in units of m/s
Answer:
F = -K x = 15 kN/m " .05 m = .75 kN = 750 N
W = 1/2 K X^2 original potential energy of block
W = 1/2 * 15 Kn/m * .0025 m^2 = 18.75 J
One cannot calculate speed of block without knowing mass of block.
what is the mass of a hiker 350m above the ground if her GPE is 120,200 J?
Given:
The height from the ground is h = 350 m
The gravitational potential energy is GPE = 120,200 J
To find the mass of the hiker.
Explanation:
The mass of the hiker can be calculated by the formula
\(\begin{gathered} GPE\text{ =mgh} \\ m\text{ =}\frac{GPE}{gh} \end{gathered}\)Here, g =9.8 m/s^2 is the acceleration due to gravity.
On substituting the values, the mass of the hiker will be
\(\begin{gathered} m\text{ =}\frac{120200}{9.8\times350} \\ =35.044\text{ kg } \end{gathered}\)Thus, the mass of the hiker is 35.044 kg
6. What is the potential energy of your 3 kg puppy that is sitting in the grass in your backyard?
Answer:
The answer is 0 J
Explanation:
Mass=3
Acceleration= 9.8
Height=0
The eqation is \(3(9.8)(0)\) or \(3*9.8*0\)
and if you do the math it adds up to 0 J
The potential energy of your 3 kg puppy that is sitting in the grass in your backyard would be 0 Joules .
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy .
ME = PE + KE
As for the given problem, we have to find out what the potential energy of your 3 kg puppy that is sitting in the grass in your backyard,
The potential energy of the puppy = m × g × h
= 3 × 9.8 × 0
= 0
Thus , the potential energy of your 3 kg puppy that is sitting in the grass in your backyard would be 0 Joules .
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What factors affect an objects kinetic energy?
Answer:
friction
air drag
every thing that opposes the motion affects kinetic energy
Explanation:
kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest
potential energy ∝ 1/(kinetic energy)
as kinetic energy increases potential energy decreases
A vehicle that gives the right, but not the obligation, to buy a reference asset at a stated price for a stated period of time is a(n):
A vehicle that gives the right, but not the obligation, to buy a reference asset at a stated price for a stated period of time is called a call option.
A call option is a financial contract that grants the holder the right to purchase a specific asset (such as stocks, commodities, or currencies) at a predetermined price, known as the strike price, within a specified period, known as the expiration date. The holder of a call option has the opportunity to buy the underlying asset if they choose to exercise the option.
Call options are commonly used in options trading as a way to speculate on the price increase of the underlying asset. If the price of the asset goes up above the strike price, the holder of the call option can profit by exercising the option and buying the asset at a lower price than its current market value. However, if the price does not reach the strike price or decreases, the holder is not obligated to exercise the option and can let it expire.
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combination unit is an air conditioner that contains components for cooling and heating in one sheet metal cabinet. True or False
Combination unit is an air conditioner that contains components for cooling and heating in one sheet metal cabinet. this is true statement.
What is combination unit of an air conditioner?Heating and cooling are often taken for granted by most people. In the winter and summer, we'll count on the heating and air conditioning to keep us comfortable. You may be able to save money and have a more comfortable environment with a single system that controls both. We may offer combination heating and air conditioning units at Climate Environmental, which will comprise air conditioning systems and heating units that will supply both warm air and cold air with the touch of a remote control.
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QUESTION 8 OF 30
Using equations for KE and GPE, what is the maximum height an object will
reach if it is thrown vertically upwards at 24.0 m/s ? (Answer to 3 sf with unit)
The maximum height an object will reach if it is thrown vertically upwards at 24.0 m/s will be equal to 29.35 meters.
What is kinetic energy?Kinetic energy is the term used in physics to describe the force that a moving item has.
It is described as the amount of effort necessary to accelerate anybody with a particular mass from rest to a given velocity. Except for variations in speed, the body retains the kinetic energy it gains during acceleration.
As per the given information in the question,
The formula of kinetic energy is,
K.E = 1/2 mv² (i)
The formula of gravitational potential energy is,
u = mg (ii)
Equate equations (i) and (ii)
1/2 mv² = mgh
h = 1/2 v²/g
h = 1/2 (24)²/9.81
= 576/19.62
h = 29.35 meters.
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Determine the kinetic energy of a 625-kg roller coaster car that is moving with a speed of 10 m/s.
Hi there!
Kinetic energy can be calculated using the following:
\(\large\boxed{KE = \frac{1}{2}mv^2}}\)
Where:
KE = Kinetic energy (J)
m = mass (kg)
v = velocity (m/s)
Plug in the given values:
\(KE = \frac{1}{2}(625)(10^2) = \boxed{31250J}\)
how will the pandemic change our life?
Q2. Zara travelled in a train moving at an average speed of 120km/h and covered a distance of 40km towards East. Calculate the time taken by the train to cover this distance.
Answer: 20 minutes
Explanation:
Given the following :
Average speed of train = 120km/hr
Distance = 40km.
The time take by the train moving at an average speed of 120km/hr to cover a distance of 40km due is ;
Recall:
Speed = distance / time
Therefore,
Time taken = distance covered / speed
Time taken = 40km / 120km/hr
Time taken = 1/ 3 hr
Therefore, 1/3 rd of an hour equals
1/3 × 60 = 20 minutes.
Time taken) 20 minutes
Time taken by tain to cover distance is 20 minutes as:
Distance= 40 km
Speed= 120 km/h
Time= distance/speed
= 40/120
= 1/3 hour
= 20 min
or =0.33 hrs
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what happens to the temperature of the gas during an isobaric expansion?
With an increase in gas volume, the gas's temperature must also rise. Temperature and volume changes result in work and an internal energy shift.
An illustration of an isobaric processBoiling water into steam or freezing water into ice are two examples of isobaric processes. A gas either expands or contracts during the process to maintain constant pressure, and as a result, the net work done by the system or on the system is determined.
What does "isobaric vs. adiabatic" mean?An adiabatic process where no heat is added to or removed from the system. an isobaric process, in which there is no change in the pressure of the system. the system's volume remains constant throughout an isochoric process.
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a ball is thrown down at 25 m/s from a 500m tall building. how fast is it traveling when it hits the ground?
Answer:
The speed of the ball when it hits the ground is 102.1 m/s
Explanation:
Given;
initial velocity of ball, u = 25 m/s
distance traveled by the ball = height of the building = h = 500 m
when the ball hits the ground, the final velocity, v = ?
The final velocity of the ball is given by;
v² = u² + 2gh
where;
g is acceleration due to gravity = 9.8 m/s²
v² = (25)² + 2(9.8)(500)
v² = 10425
v = √10425
v = 102.1 m/s
Therefore, the speed of the ball when it hits the ground is 102.1 m/s
two asteroids crashed. The crash caused both asteroids to change speed. Scientists want to use the change in speed and motion to figure out which asteroid has more mass. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the asteroids changed their motion.
Asteroid 1 has more mass than Asteroid 2.
Asteroid 1 and Asteroid 2 are the same mass.
Asteroid 1 has less mass than Asteroid 2.
Answer:
The answer is asteroid 1 has more mass
Explanation:
If the initial speed of both asteroids before the collision is equal, then the asteroid with more mass has more momentum before collision while the asteroid with lesser mass has greater momentum after the collision.
What is law of conservation of linear momentum?According to the principle of conservation of linear momentum, the sum of the momentum before the collision must equal the sum of the momentum after the collision.
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
where m₁ and m₂ is the mass of the objects that collided, u₁ and u₂ is their initial speed and v₁ & v₂ is their final speed.
The linear momentum is the product of the mass of the object times the velocity of that object. Conservation of momentum is a property exhibited by any object where the total amount of momentum never changes.
The principle of conservation of linear momentum states that if two objects collide with each other, then the total momentum before and after the collision will remain the same if there will be no external force acting on the colliding objects.
Therefore, the linear momentum of both asteroids will be conserved as no external force acting on them. The asteroid with more mass has more momentum before collision while the asteroid with lesser mass has greater momentum after the collision so that total momentum remains conserved.
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why is one year on earth 365 days but one year on mercury 88 days
compare the conditions that led to the formation of the inner planets with those that led to the formation of the outer planets.
The process of formation of the inner planets, namely from a collection of solid objects, gas, and dust that are joined in a heavy mass. During the initial process of forming a gas disc, a number of dust, gas, and other surrounding material fly in the same mass line and surround the sun like a belt.
The process of forming the outer planets is from the cooling process of several clumps that also orbit, continue to spin, and pull the sky material around them in the form of gas, dust and solid objects with their own gravity then solidify and become planets.
The Solar System is a collection of celestial bodies consisting of a star called the Sun and all objects bound by its gravitational force. The Sun is the center of the solar system. The sun is a star that is closest to the earth. Like other stars, the Sun is a hot object composed of various high-pressure gases. The sun is gigantic when compared to even the largest planet.
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Tariah is riding on her bike at 4m/s (North). If she accelerates at a rate of 1.5 m/s^2 for 2 s, what is her final velocity?
ANSWER:
7 m/s
STEP-BY-STEP EXPLANATION:
Given:
Initial velocity (u) = 4 m/s
Acceleration (a) = 1.5 m/s^2
Time (t) = 2 s
We can calculate the final velocity using the following formula:
\(v=u+a\cdot t\)We replace and calculate the value of the final velocity:
\(\begin{gathered} v=4+2\cdot1.5 \\ v=4+3 \\ v=7\text{ m/s} \end{gathered}\)The final velocity is equal to 7 m/s.
You are freezing juice to make your own popsicles. Describe what happens on a molecular level as the juice freezes. Be sure to us e appropriate science vocabulary in your response.
Answer:
When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.
Explain how your model is different from the model in the picture
What does your model look like and the one it's being compared to?
Answer:
you should prolly put the model
Explanation: