Answer:
36.6226 km/h
Explanation:
The apparent depth of an object at the bottom of a tank filled with a liquid of refractive index 1.3 is 7.7 cm. What is the actual depth of the liquid in the tank?
[tex] \orange{\underline{\huge{\bold{\textit{\green{\bf{QUESTION}}}}}}}[/tex]
The apparent depth of an object at the bottom of a tank filled with a liquid of refractive index 1.3 is 7.7 cm. What is the actual depth of the liquid in the tank?
[tex]{\bold{\blue{GIVEN}}}[/tex]
REFRACTIVE INDEX = 1.3
APPARENT DEPTH = 7.7 cm
[tex]{ \bold{\green{To \: Find}}}[/tex]
REAL DEPTH OF THE OBJECT.
[tex]{\red{FORMULA \: \: USED }}[/tex]
[tex]Reflective \: Index = \frac{Real \: Depth}{Apparent \: Depth } [/tex]
[tex] \huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}[/tex]
Refractive Index = 1.3
Apparent Depth = 7.7 cm
Putting the values in the formula:-
[tex]Reflective \: Index = \frac{Real \: Depth}{Apparent \: Depth } \\ \\ 1.3 = \frac{Real \: Depth}{7.7 \: cm} \\ \\ 1.3 \times 7.7 = Real \: Depth \\ \\ 10.01 \: \: cm = Real \: Depth[/tex]
The pulley system has a mechanical advantage of 5. Determine how much input force is required to achieve 1000 N of lifting force.
Answer:
Input force of pulley system = 200 N
Explanation:
Given:
Mechanical advantage of pulley system = 5
Output force from pulley system = 1,000 N
Find;
Input force of pulley system
Computation:
Mechanical advantage = Output force / Input force
Mechanical advantage of pulley system = Output force from pulley system / Input force of pulley system
5 = 1,000 / Input force of pulley system
Input force of pulley system = 1,000 / 5
Input force of pulley system = 200 N
Round off the following numbers to three significant digits:
43.659
Answer: 43.7
Explanation: Simply round the number so that there are only three digits in the number.
We have that 43.659 rounded to three significant digits is
[tex]43.659=43.7[/tex]
From the Question we are Given
Integer=43.659
To round off to three significant digits means to represent only three digits
Therefore
43.659 in three digits is
[tex]43.659=43.7[/tex]
For more information on this visit
https://brainly.com/question/17353491
This question is just for the points
#yourwelcome
#youcanaddme
Answer:
Wow, thank you so much! I hope you have a great day!
Why SI system is advantageous over MKS System
Explanation:
SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system .
Hope it is helpful to you ☺️
Answer:
Explanation:
SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system.
What technique is used by scientists to determine which of several explanations is the best explanation
Answer:
When conducting research, scientists use the scientific method to collect measurable, empirical evidence in an experiment related to a hypothesis (often in the form of an if/then statement), the results aiming to support or contradict a theory.
I HOPE ITS RIGHT
The process of scientific methods involves making inferences, deriving predictions from hypotheses as logical consequences, and conducting experiments or empirical observations based on those predictions.
Which method do scientists use for research?When conducting research, scientists use scientific methods to experiment with hypotheses (often in the form of if-then statements) aimed at supporting or disproving the scientific theory. Collect empirical evidence.
The six steps of the scientific method are
1) asking about what you are observing,
2) doing background research to learn what is already known about the subject,
3) making hypotheses, and
4). Experiment with a hypothesis, 5) analyze data
Learn more about the scientific method here: https://brainly.com/question/17216882
#SPJ2
5 description of a motion
Answer:
DisplacementDistanceVelocity AccelerationSpeed TimeExplanation:
HOPE IT HELPS
A rock is thrown horizontally from a height of 6.00 m. Which of the following is the time required for the rock to reach the ground ?
Answer:
t=10.95 seg
Explanation:
The vertical component of velocity is 0, so, the time in air can be calculated
[tex]h=v_ot-\frac{1}{2}gt^2\\\\h=0-\frac{1}{2}gt^2~=>t=\sqrt{2gh}=\sqrt{2*10\frac{m}{s^2}*6m}=10.9544~seg[/tex]
help pls i really don't know the answers
Answer:
In the first one circle : luster
second circle: atsuete seeds
third: dentures
Explanation:
Well I ain’t sure
The energy stored by any pair of positive charges is inversely proportional to the distance between them, and directly proportional to their charges. Three identical point charges start at the vertices of an equilateral triangle, and this configuration stores 15 Joules of energy. How much more energy, in Joules, would be stored if one of these charges was moved to the midpoint of the opposite side
Answer:
U = 25 J
Explanation:
The energy in a set of charges is given by
U = [tex]k \sum \frac{q_i}{r_i}[/tex]
in this case we have three charges of equal magnitude
q = q₁ = q₂ = q₃
with the configuration of an equilateral triangle all distances are worth
d = a
U = k ( [tex]\frac{q_1q_2}{ r_1_2 } + \frac{q_1q_3}{r_1_3} + \frac{q_2q_3}{r_2_3}[/tex] )
we substitute
15 = k q² (3 / a)
k q² /a = 5
For the second configuration a load is moved to the measured point of the other two
d₁₃ = a
The distance to charge 2 that is at the midpoint of the other two is
d₁₂ = d₂₃ = a / 2
U = k (\frac{q_1q_2}{ r_1_2 } + \frac{q_1q_3}{r_1_3} + \frac{q_2q_3}{r_2_3})
U = k q² ( [tex]\frac{2}{a} + \frac{1}{a} + \frac{2}{a}[/tex] )
U = (kq² /a) 5
substituting
U = 5 5
U = 25 J
The initial velocity of a micro van is 15 m/s. It gains a velocity of 40 ms in 10 seconds. Calculate the average velocity and acceleration of the [Ans: 27.5 m, 25 m/s d/ A racing car starts from rest. If it gains an acceleration of 5m/s in 10 seconds, calculate the final velocity. (Ans: 50 m van.
Answer:
[tex]{ \bf{average \: velocity = \frac{15 + 40}{2}}} \\ = 27.5 \: {ms}^{ - 1} \\ { \bf{acceleration = \frac{v - u}{t} }} \\ = \frac{40 - 15}{10} \\ = 2.5 \: {ms}^{ - 2} \\ \\ { \tt{second \: qn : }} \\ { \bf{final \: velocity =u + at }} \\ v = 0 + (5 \times 10) \\ = 50 \: {ms}^{ - 1} [/tex]
______ is a procedure for measuring hearing sensitivity at certain frequencies using pure tones presented through an oscillator placed on the forehead or mastoid bone of the listener.
Answer: Pure-Tone Audiometry
Explanation:
Pure-tone audiometry refers to the behavioral test that is used in the measurement of hearing sensitivity. Pure tone audiometry an hearing test that's used in the identification of an individuals hearing threshold levels which is used in determining the degree of a hearing loss and then a basis for diagnosis will be provided.
Therefore, Pure-Tone Audiometry is a procedure that's used for measuring hearing sensitivity at certain frequencies using pure tones presented through an oscillator placed on the forehead or mastoid bone of the listener.
what is the x component that of a vector that is defined 2.5m at 64 degree?
A) -2.2m
B) 1.1m
C) 2.2m
D) -1.1m
Answer:
Explanation:
This is a displacement vector since it is given in terms of a distance (meters, to be specific). The way you find the x-component is:
[tex]V_x=Vcos\theta[/tex] which means you multiply the magnitude (length) of the vector times the cos of the direction (the angle):
[tex]V_x=2.5cos(64)[/tex] to get
1.1 m, choice B.
What kind of proof is required when disproving old ideas?
A.
Experimental evidence that supports the new idea
B.
Survey results that show popular support for the new idea
C.
Peer review that does not support the new idea
D.
A well-stated hypothesis that shows the new idea can be tested
Experimental evidence that supports the new idea
A car traveling at an initial velocity of 12.0 m/s accelerates at a constant rate to 20.0 m/s over a time of 4.00 s. How far did the car travel during this time (m)?
Which of the following are steps for balancing chemical equations?
A. Add all the elements together.
B. Count the atoms in each substance in the reactants and products.
C. Subtract the total amount of elements from the products.
D. Write the chemical equation using formulas and symbols.
A typical jar that has been tightened to a reasonable degree requires 2.0 N⋅m to open. If you grab a 8.2-cm-diameter jar lid with one hand so that your thumb and fingers exert equal magnitude forces on opposite sides of the lid, what is the magnitude of each of the forces?
Answer: 24.39 N
Explanation:
Given
Torque required to open the lid is [tex]\tau =2\ N.m[/tex]
diameter of lid [tex]d=8.2\ cm[/tex]
Force exerted by fingers and thumb forms a couple. So, torque can be written as
[tex]\Rightarrow \tau= F\times 2r\\\Rightarrow 2=F\times 8.2\times 10^{-2}\\\\\Rightarrow F=\dfrac{200}{8.2}\\\\\Rightarrow F=24.39\ N[/tex]
Thus, the magnitue of each force is 24.39 N
The following diagram shows various positions of the moon in its orbit around Earth. The image of the moon shows its phase as seen from Earth.
In which position will three-fourths of the illuminated side of the moon be visible from Earth?
a. A
b. B
c. C
d. D
See file for diagram.
Answer: I dont know Im srry diagram
Explanation:
Diagram baby + baby Diagram = Diagram baby Diagram
A vector has an x-component
of 19.5 m and a y-component
of 28.4 m.
Find the magnitude of the
vector.
Answer:
34.45m
Explanation:
Magnitude of a vector is equal to the square root of sum of squares of x & y vectors.
Magnitude = [tex]\sqrt({x^2} + {y^2})[/tex]
= [tex]\sqrt({19.5^2} + {28.4^2})[/tex]
=34.45m
Which of the following correctly describes how particular type of mirror reflects light? Convex mirrors reflect light to a central point (converging). Concave mirrors reflect light to a central point (converging). Concave mirrors reflect light so the light spreads out (diverging).
Answer:
Concave mirrors reflect light to a central point (converging)
Suppose the source is to the left of the mirror in question.
Parallel rays into the mirror are always reflected towards the focal point.
In the case of a concave mirror the real parallel rays pass thru the focal point.
If the mirror is convex the rays will diverge to the left and act as if they were emanating from the focal point to the right of the mirror.
write example of equilibrium?
Answer:
chemists say that equilibrium lies to the right as written, favoring the formation of products. An example is the reaction between H2 and Cl2 to produce HCl, which has an equilibrium constant of 1.6×1033 at 300 K
I suppose this is right?
Explanation:
prove that v^2=2gh is dimensionally correct.
Answer:
The formula is correct.
Explanation:
The given expression is :
[tex]v^2=2gh[/tex]
Where
v is the velocity
g is acceletion due to gravity
h is height
Taking LHS,
The dimensional formula for [v] = [LT⁻¹]
[v²] = [L²T⁻²]
Taking RHS,
The dimensional formula for [g] = [LT⁻²]
The dimensional formula for [h] =[L]
2gh = [LT⁻²][L]
= [L²T⁻²]
So, LHS = RHS
So, the given formula is correct dimensionally.
A crane lifts a 100 kg concrete block to a vertical height of 25 m. Calculate
the work done by the crane.
only answer if u know pls
Answer:
Solon,
total mass (kg)= 100kg
height (h)= 25m
acceleration due to gravity = 9.8m/s²
so,
work done =m*g*h
= 100*9.8*25
= 24,500 joule
The work done by the crane in lifting the given mass of concrete to the given vertical height is 24500 Joules.
What is Work done?Work done is simply defined as the energy transfer that takes place when an object is either pushed or pulled over a certain distance by an external force. It is expressed as;
W = F × d
Where f is force applied and d is distance travelled.
Note that, the concrete is lifted upward, Weight of the concrete becomes mass multiply by acceleration due to gravity. g = 9.8m/s²
F = Weight = mg
Given that;
Mass of the concrete m = 100kgDistance covered/Height d = 25mWork done W = ?W = F × d
W = (mg) × d
W = ( 100kg × 9.8m/s² ) 25m
W = 980kgm/s² × 25m
W = 24500kgm²/s²
W = 24500J
Therefore, the work done by the crane in lifting the given mass of concrete to the given vertical height is 24500 Joules.
Learn more about work done here: brainly.com/question/26115962
#SPJ2
HURRY PLS IM IN NEED. Question 14 of 16
Which chemical equation represents a synthesis reaction?
O A. 2Na+ MgCl2 - 2NaCl + Mg
B. C+02 - CO2
C. H2CO3 - H2O + CO2
OD. HCI + LiOH
LiCl + H20
Answer:
B: C + O2 = CO2
Explanation:
In Chemistry,a synthesis reaction is one that occurs when two or more reactants combine in such a manner that they form a single product.
Looking at the options, the only one where 2 reactants combine to form a single product is option C where Carbon reacts with Oxygen to form carbon (IV) oxide.
What are the major components of a truss bridge?
Answer:
In a truss bridge, two long - usually straight members known as chords - form the top and bottom; they are connected by a web of vertical posts and diagonals. The bridge is supported at the ends by abutments and sometimes in the middle by piers.
Explanation:
Hope it helps mark as brainliest pls
:)
The source of electromagnetic waves is _____.
vibrating atoms
magnetic fields
electric fields
vibrating electric charges
Answer:
its electric or magnetic fields, i think its electric fields
Hope its right
a closed system consitts of a pendumluem that is swinging back and forth. if the pendulums gravitational potential energy decreases, what else must happen to the energy of the system.
Answer:
Its gravitational potential energy must increase.
Explanation:
Conservation of Mechanical Energy
The total amount of mechanical energy, in a closed system in the absence of dissipative forces like friction or air resistance, remains constant.
This means that energy cannot disappear or appear and that potential energy can become kinetic energy or vice versa.
In a closed system like a pendulum, two types of energies are considered: Gravitational potential (U) and kinetic (K). Thus, the sum of both energies must remain constant in time.
Suppose the pendulum is at a state where U=150 J, and K=350 J. The total mechanical energy is:
M = 150 J + 350 J = 500 J
If the kinetic energy decreases to a new value, say K = 200 J, then the gravitational potential must increase to compensate for this new condition, that is: U = 300 J
So, It's gravitational potencial energy must increase
Hope it helps you I'm from ph :)
Bx = -1.33 m and By = 2.81 m
Find the magnitude of the
vector.
Answer:
Explanation:
The formula for the magnitude of a vector is
[tex]B_{mag}=\sqrt{(-1.33)^2+(2.81)^2}[/tex] and then round to the hundredths place:
3.11 m. Since we are in Q2, we can also find the direction of this vector:
[tex]tan^{-1}(\frac{2.81}{-1.33})=-64.7[/tex] but since we are in Q2, we add 180 degrees to the result, getting the angle to be 115.3
Answer:115.33
Explanation:
What units should be used when measuring the mass of a ladybug?
millimeters
grams
kilograms
meters
If I had a blue RGB fish tank and my fishes were red what color would I see the fishes?
Will give brainliest!
Answer:
the fish wilil appear to be purple
Explanation: