А A pool of water of refractive index
4/3! is 60cm deep. Find its apparent
depth when viewed vertically through
air.
Answer:
Apparent depth = 45 cm
Explanation:
The refractive index of water in a pool, n = 4/3
Real depth, d = 60 cm
We need to find its apparent depth when viewed vertically through air. The ratio of real depth to the apparent depth is equal to the refractive index of the material. Let the apparent depth is d'. So,
[tex]n=\dfrac{d}{d'}\\\\d'=\dfrac{d}{n}\\\\d'=\dfrac{60}{\dfrac{4}{3}}\\\\d'=45\ cm[/tex]
So, the apparent depth is 45 cm.
You push a 10N object 10 meters. How much work was done on the object.
The acceleration due to gravity on Earth is 9.81 m/s² [down]. A hockey puck was launched from the ice with a velocity of 50.0 m/s [up]. Assuming no friction, determine the velocity of the puck at its maximum height.
Answer:
0 m/s.
Explanation:
When an object is shot up into the air the only force acting on it is gravity while neglecting wind. As the gravity is acting on the object it keeps decelerating till its velocity becomes 0 after which it can go no further. The maximum height of the object is at this point.
So, at its maximum height the velocity of the puck will be zero.
What is the potential energy of a puppy that weighs 18 N istting in a high chair 2 m high?
Answer:
Potential energy =mass* acceleration due to gravity * height
mass*acceleration due to gravity =weight
hence potential energy of the puppy= weight * height
=18*2
=36 joule
The density of gold is 19.3 gm/cc. Express it's value in SI unit.
Answer:
SI unit of density is kg/m^3
Using unit conversion:
density = 19.3 * 1000 kg/m^3
Explanation:
I assume that you are asking for the density conversion to SI, sorry if this isn't what you were asking.
Two children ride side-by-side on a carousel. Their paths are shown in the image below.
Which child has a greater tangential velocity?
Question 6 options:
The child represented by a triangle on the inside path.
The child represented by a star on the outside path.
The child on the faster horse.
Both travel at the same tangential velocity.
Answer:
The child represented by a star on the outside path.
Explanation:
The theory that attitudes will be formed and changed according to one’s actual behaviors is the __________ theory. A. learning B. dissonance C. self-perception D. balance
Answer:
Letter C Cuh
Explanation:
Answer:
C. self-perception
Explanation:
Cuh above me is right
Solenoid 2 has twice the radius and six times the number of turns per unit length as solenoid 1. The ratio of the magnetic field in the interior of 2 to that in the interior of 1 is:___________A. 2B. 4C. 6D. 1E. 1/3
Given :
Solenoid 2 has twice the radius and six times the number of turns per unit length as solenoid 1.
To Find :
The ratio of the magnetic field in the interior of 2 to that in the interior of 1.
Solution :
We know, magnetic field in the interior of a solenoid is given by :
[tex]B = \dfrac{\mu ni}{L}[/tex]
Let, length of solenoid 2 is L.
Therefore, length of solenoid 1 is 6L.
[tex]B_a=\dfrac{\mu (6n)i}{L}\\\\B_b = \dfrac{\mu n i}{L}[/tex]
Dividing [tex]B_a[/tex] by [tex]B_b[/tex] :
[tex]\dfrac{B_a}{B_b}=\dfrac{\dfrac{\mu (6n)i}{L}}{\dfrac{\mu n i}{L}}\\\\\dfrac{B_a}{B_b}=6[/tex]
Therefore, the correct answer is C. 6.
“An object completely submerged in a fluid displaces its ovn volume of fluid". This is:
Answer:
Archimedes' principle
Explanation:
An object completely submerged in a fluid displaces its own volume of fluid is postulate from the Archimedes' principle.
If a fluid, the liquid supports the body by a buoyant force. The buoyant force is the reaction to the imposed weight exerted by the object placed in the medium. The upward force on the body is the upthrust.What is a magnetic material?
Answer:
Diamagnetism.
Paramagnetism.
Ferromagnetism.
Ferrimagnetism.
Antiferromagnetism.
Explanation:
Magnetic materials are materials studied and used mainly for their magnetic properties. The magnetic response of a materials is largely determined by the magnetic dipole moment associated with the intrinsic angular momentum, or spin, of its electrons.
Answer:
materials studied and used mainly for their magnetic properties
Explanation:
Iron is an extremely well-known ferromagnetic metal.
Nickel is another popular magnetic metal with ferromagnetic properties.
also, Magnetism is the force exerted by magnets when they attract or repel each other. :)
Do you thin it is possible to have the benefits of the Agricultural and Industrial revolutions without the environmental costs?
Answer:No
Explanation:There is no current technology which supports zero waste exhaust
When you use a
spray bottle, you force air over
a small tube inside the bottle.
Explain why the liquid inside
the bottle comes out.
Answer: Spray bottles are an extremely useful type of machine and an excellent demonstration of basic plumbing principles. A spray-bottle head is made up of only a few parts. It has a trigger lever, which activates a small pump. This pump is attached to a plastic tube that draws cleaning fluid from the bottom of the reservoir. The pump forces this liquid down a narrow barrel and out a small hole at the gun's muzzle. The hole, or nozzle, serves to focus the flowing liquid so that it forms a concentrated stream.
The only complex element in this design is the fluid pump, and it's about as simple as they come. The main moving element is a piston, housed inside a cylinder. Inside the cylinder, there is a small spring. To operate the pump, you pull the trigger back, pushing the piston into the cylinder. The moving piston compresses the spring, so when you release the trigger, the piston is pushed back out of the cylinder. These two strokes of the piston, into the cylinder and out again, constitute the entire pump cycle.
Explanation:
Awnser: The liquid comes out because you're using your hand to squeeze the handle, which forces it out.
A net force of 10 N accelerates a mass of 5 kg with an acceleration of 2
m/s2. If the mass of the object is doubled, then the acceleration will now
be: (Remember Newton's 2nd Law: EF=ma)
4 m/s2
2 m/s2
O 1 m/s2
O 0.25 m/s2
Answer:
1 m/s²
Explanation:
The following data data were obtained from the question:
Net force (F) = 10 N
Initial mass (m1) = 5 Kg
Initial acceleration (a1) = 2 m/s²
Final mass (m2) = double the initial mass = 2 × 5 = 10 kg
Final acceleration (a2) =?
The final acceleration of the object can be obtained as follow:
Recall:
Force (F) = mass (m) × acceleration (a)
F = m × a
Keeping the force constant, we have
m1a1 = m2a2
With the above formula, we can obtain the final acceleration of the car as follow:
Initial mass (m1) = 5 Kg
Initial acceleration (a1) = 2 m/s²
Final mass (m2) = 10 kg
Final acceleration (a2) =?
m1a1 = m2a2
5 × 2 = 10 × a2
10 = 10 × a2
Divide both side by 10
a2 = 10 /10
a2 = 1 m/s²
Therefore, the final acceleration of the car will be 1 m/s²
If you use a horizontal force of 30.0 N to slide a 12.0 kg wooden crate across the floor at a
constant velocity, what is the normal force?
Answer:
i found: μk= 0.25
Explanation:
Newton's law is split into two components along
x and y , that, using our data, give:
30 − μkRn = 0
Rn = mg = 12⋅9.81 = 117.7 ≈ 118N
So: μk = 30/118 = 0.25
Please Mark Brilliant
Please help will mark Brainliest. An object is dropped from the roof of a building. After 3.5 seconds, the object strikes the ground. A.) After 2 seconds, what is the speed of the object? B.) At what speed does the object strike the ground? C.) Find the height from which the object was dropped. Show Work
Answer:
19.62 m/s
34.335 m/s
1.75 m
Explanation:
v = Final velocity
u = Initial velocity = 0
a = g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
t = Time taken = 2 s
From the equations of linear motion we have
[tex]v=u+at\\\Rightarrow v=0+9.81\times 2\\\Rightarrow v=19.62\ \text{m/s}[/tex]
The speed of the object after 2 seconds is 19.62 m/s
t = 3.5 s
[tex]v=u+at\\\Rightarrow v=0+9.81\times 3.5\\\Rightarrow v=34.335\ \text{m/s}[/tex]
The velocity of the object when it strikes the ground is 34.335 m/s.
[tex]v^2-u^2=2as\\\Rightarrow s=\dfrac{v^2-u^2}{2a}\\\Rightarrow s=\dfrac{34.335-0}{2\times 9.81}\\\Rightarrow s=1.75\ \text{m}[/tex]
THe height from which the object was dropped is 1.75 m.
What is pulling the box down
Answer:
Gravity is pulling the box down. :)
Explanation:
The amount of work required for a
dump truck to move a mound of dirt 0
meters using a foree of 70 Newtons is
what?
Answer:
if I'm not wrong, 0 Joules
Explanation:
If it is not being moved at all, then no work is being done
A small sculpture made of gold ( rho gold =19320 kg/m^ 3 ) is believed to have a secret central cavity. The weight of the sculpture in air is 11.29 N. When it is submerged in water, the weight is 9.190 N. What is the volume of the secret cavity?
Answer:
1.1 x 10⁻⁵m³
Explanation:
Given parameters:
Weight in air = 11.29N
Weight in water = 9.190N
Density of gold = 19320kg/m³
Unknown:
Volume of the secret cavity = ?
Solution:
To solve this problem, we need to find the mass of the secret cavity.
Weight of the cavity = Weight of sculpture in air - Weight of sculpture in water
Weight of cavity = 11.29N - 9.190N = 2.1N
Weight = mass x acceleration due to gravity
Mass =[tex]\frac{2.1}{9.8}[/tex] = 0.2kg
So;
Volume of substance can be determined from the density.
Density = [tex]\frac{mass}{volume}[/tex]
Volume = [tex]\frac{mass}{density}[/tex]
Now insert the parameters and solve;
Volume = [tex]\frac{0.2}{19320}[/tex] = 1.1 x 10⁻⁵m³
1. An 95 N force has been applied to a block and move it 25 m along the direction of
the force. How much work has been done to the block?
Answer:
2375 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 95 × 25
We have the final answer as
2375 JHope this helps you
Sometimes in the winter, ice crystals grow directly from the moisture in the air. As the water changes from a gas to a solid, the molecules
Group of answer choices
slow down as they gain energy.
slow down as they lose energy.
speed up as they lose energy.
speed up as they gain energy.
Answer: B. slow down as they lose energy
On a given microscope, the numerical apertures of the condenser and low-power objective lenses are 1.25 and 0.25. You are supplied with a filter that selects a wavelength of 520nm.
Required:
a. What is the limit of resolution on this microscope?
b. Will you be able to distinguish 2 points that are 300nm apart as being separate, or will they blur into one?
Answer:
- colony: mass of single-type cells formed from single cell/small chain; pair or small cluster of cells; visible to naked eye
- colony forming unit: not visible to eye, original single cell or small chain/pair or small cluster of cells FROM WHICH colony forms
- Streaking plate: producing isolated colonies upon incubation using streak plate methods in agar
- Quadrant streak: used when sample is of high density
- Zigzag pattern: used when sample is of low density
a. The limit of resolution on this microscope is approximately 1254nm.
b. Two points that are 300nm apart will blur into one and cannot be distinguished as separate using this microscope.
The formula for the limit of resolution (d) is given by:
d = (0.61 × λ) / NA
where λ is the wavelength of light and NA is the numerical aperture.
a. To find the limit of resolution:
Given:
Wavelength of light (λ) = 520nm
Numerical aperture of the low-power objective lens (NA) = 0.25
Substituting these values into the formula, we have:
d = (0.61 × 520) / 0.25
d = 1254nm
Therefore, the limit of resolution on this microscope is approximately 1254nm.
b. To determine if two points 300nm apart can be distinguished:
Given:
Separation between the points (d) = 300nm
Since the separation between the points (300nm) is smaller than the limit of resolution (1254nm), the two points will blur into one and will not be distinguishable as separate entities.
In conclusion:
a. The limit of resolution on this microscope is approximately 1254nm.
b. Two points that are 300nm apart will blur into one and cannot be distinguished as separate using this microscope.
To know more about the resolution of the microscope:
https://brainly.com/question/30612401
#SPJ6
If circumference C = 2 pi r where r is the radius, how long would it take a car to travel
once around a circular track with a 80 meter radius if it is traveling 50 m/s ?
an inclinded plane makes work easier by increasing the distance and blank the force
Hi! I believe your answer is decreasing. An inclined plane makes work easier by decreasing the amount of effort force needed, but increases the distance. I hope this helps you! Good luck and have a great day. ❤️✨
which of the following statements about ocean waves a true?
A. they travel on the surface of the water
B. they travel deep underwater
C. they are secondary waves
D. they are primary waves
The assertion that ocean waves move on the water's surface is accurate. Therefore, choice A is right.
What is the ocean waves?A wind wave, water wave, or tornado water wave is a surface wave that develops on a body of water's free surface as a result of the air flowing over the ocean's surface. The fetch is the distance at which two objects come into touch when facing the wind.
The wind is the most frequent source of waves. The friction between the wind and the surface of the water produces wind-driven waves, also known as surface waves. A wave crest is produced when wind continuously disturbs the water's surface in an ocean or lake.
The statements about ocean waves a true will be they travel on the surface of the water.
Thus, option A is correct.
More about the ocean waves link is given below.
https://brainly.com/question/101258
#SPJ6
i) Give two practical
application of static friction
1). Walking / Driving
If there were no static friction between the soles of your shoes and the ground, then you could move your feet back and forth but your body would never go anywhere.
Same for using tires to move a car, a bus, a bicycle or a motorcycle.
2). Sleeping
If there were no static friction between your jammies and the sheet, you would slide right off of the bed whenever there was the slightest breeze of air in the room.
Can you harvest energy by impact force in a battery? Explain your answer.
Answer:
1. Resistance
2. Store chmical energy and transfer it to electrical energy when a circuit is connected
3.Electric current
4. Series and parallel
5. can't see diagram
6. series
7. Parallel
8. can't not see diagram
Explanation:
Which structures are in the cytoplasm? Check all that apply
Cell membrane
Chloroplast
Endoplasmic reticulum
Lysosomes
Cell wall
Nucleus
Vacuoles
Answer:
nucleus and endoplasmic reticulum. I'm pretty sure the mitochondria is in the cytoplasm too
Answer:
2.chloroplasts
3.endoplasmic reticulum
4.lysosomes
6.nucleus
7.vacuoles
Explanation:
These were the correct answers in my Cell Structure Assignment.
At which point(s) does the pendulum have the greatest potential energy?
A only
B only
C only
both A and C
Potential energy is the energy possessed by a body because of its position relative to other bodies.
At both point A and C pendulum have the greatest potential energy.
Potential energy would be highest when the pendulum is at its highest point on either side of its motion where it is stationary for an instant.
At end point A and C , where all kinetic energy has been converted to potential energy because it is stationary for an instant at that points.
So, at points A and C , kinetic energy is zero because velocity is zero and all energy stored in form of potential energy.
Learn more:
https://brainly.com/question/18784400
Answer:
for some reason, i got B. tried a and c
Explanation:
it might depend on which problem you get i guess.
A 3.35 kg object initially moving in the positive x direction with a velocity of 4.90 m s collides with and sticks to a 1.88 kg object initially moving in the negative y direction with a velocity of 3.12 m/s. Find the final components of velocity of the composite object.
Answer:
The final components of velocity of the composite object is 3.33 m/s.
Explanation:
Given;
mass of the first object, m₁ = 3.35 kg
initial velocity of the first object, u₁ = 4.90 m/s in positive x-direction
mass of the second object, m₂ = 1.88 kg
initial velocity of the second object, u₂ = 3.12 m/s in negative y-direction
initial momentum of the first object, P₁ = 3.35 x 4.9 = 16.415 kgm/s
initial momentum of the second object, P₂ = 1.88 x 3.12 = 5.8656 kgm/s
The resultant velocity of the two objects is given by;
R² = 16.415² + 5.8656²
R² = 303.858
R = √303.858
R = 17.432 kgm/s
Apply the principle of conservation of linear momentum for inelastic collision;
total initial momentum before = total final momentum after collision
P₁(x) + P₂(y) = Pf
R = Pf
R = v(m₁ + m₂)
17.432 = v(m₁ + m₂)
where;
v is the final components of velocity of the composite object
[tex]v = \frac{17.432}{m_1 + m_2} \\\\v = \frac{17.432}{3.35+1.88} \\\\v = 3.33 \ m/s[/tex]
Therefore, the final components of velocity of the composite object is 3.33 m/s.
I need help please .....
Answer:
Explanation:
All of the energy in the pendulum is kinetic energy and there is no gravitational potential energy. However, the total energy is constant as a function of time.