Answer: 1.6 N
Explanation:
The weight of an object is calculated as:
W = g*m
where:
g = gravitational acceleration = 9.8m/s^2
m = mass of the object.
We also know that:
mass = density*volume.
or:
m = d*v
Let's start:
The weight of the beaker is 0.4N
And the weight of the beaker filled with water is 1.4N
Then the weight of the water alone will be:
1.4N - 0.4N = 1N = (d*v)*9.8m/s^2
And we know that the density of the water is:
1 g/cm^3
But we are working with Newtons, then we need to rewrite this with kilograms as the mass unit, we can use that:
1000g = 1kg
Now we can rewrite the density as:
d = 1 g/cm^3 = 1*(1/1000) kg/cm^3 = 0.001 kg/cm^3
Replacing that in the above equation, we get:
With this, we can find the volume that the water occupies.
W = 1 N = v* 0.001 kg/cm^3*9.8m/s^2
1 N /( 0.001 kg/cm^3*9.8m/s^2 ) = 102.04 cm^3.
Now, when we fill it with a brine with a density of 1.2 g/cm^3, the mass of this brine in a volume of 102.04 cm^3 be:
M = (1.2 g/cm^3)*( 102.04 cm^3) = 122.448 g
Rewriting this in kg we get:
M = 122.448 g = (122.448/1000) kg = 0.122448 kg
Then the weight of this brine is:
M = 0.122448 kg*9.8m/s^2 = 1.2 N
And the beaker weighs 0.4N, then the beaker filled with this brine will weight:
1.2 N + 0.4N = 1.6 N
PLEASEEE HELPPP!!!!
A mover slides a refrigerator weighing 650 N at a constant velocity across the floor
a distance of 8.1 m. The force of friction between the refrigerator and the floor is
230 N. How much work has been performed by the mover on the refrigerator?
Answer: The work is 1863 N*m
Explanation:
We can define work as:
W = F*d
Where F is the force that the mover needs to apply to the refrigerator, and d is the distance that the refrigerator is moved.
To move the refrigerator, the minimal force that the mover needs to do is exactly the friction force (In this case, the refrigerator will move with constant speed).
Then we will have:
F = 230 N
and the distance is 8.1 meters, then the work will be:
W = 230N*8.1 m = 1863 N*m
Which cell structure is found in plant cells, but not in animal cells?
Answer:
Cell wall and chloroplasts (only for leaves)
Explanation:
All plant cells have cell walls to give the cell a fixed shape but animal cells do not have cell walls. Some cells like leaf cells have chloroplasts to make their own food for the plant while animal cells do not have chloroplasts.
True or False? The horizontal component of velocity of a projectile remains constant; the vertical component of velocity changes throughout the trajectory.
Answer:
False!!
Explanation:
Read the following dream interpretation and answer the question that follows.
"I suspect that the patient's dream of being chased originates from his unresolved feelings of guilt during childhood."
What perspective of dream interpretation is being offered?
A. Freudian
B. activation-synthesis
C. Jungian
D. motivation
Answer:
Freudian
Explanation:
Answer:
Freudian
Explanation:
A truck travels at a constant acceleration of 3.6 m/s2. Find the mass of the truck if a
39,600 N net force is required to produce this acceleration.
Answer:
The mass of the truck is 11,000 Kg.
Explanation:
Mechanical Force
According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:
F = m.a
Where a is the acceleration of the object.
It's given a truck travels at a constant acceleration of [tex]a=3.6~m/s^2[/tex] when a net force of F=39,600 N is applied.
To find the mass of the truck, solve the equation for m:
[tex]\displaystyle m=\frac{F}{a}[/tex]
[tex]\displaystyle m=\frac{39,600}{3.6}[/tex]
Operating:
m = 11,000 Kg
The mass of the truck is 11,000 Kg.
sonu and meenu build a circuit like the one shown below.name the component laballed X. What are sonu and meenu using the component labelled X to measure?
Answer:
this conponent is a bulb
and is used to measure brightness
In her lab, Mrs. Smith is pulling a 28 N block across a surface with a constant speed. If
she must pull with a force of 4.0 N, what is the coefficient of sliding friction between the
block and the lab table?
Answer:
0.14 is the friction coefficient.
Explanation:
The equation for the friction coefficient is friction coefficient = force/normal force. The force is 4N, and the normal force is 28N. 4/28=0.14.
Why are the inner plaets smaller
Answer:
The inner planets are much smaller than the outer planets and because of this have relatively low gravity and were not able to attract large amounts of gas to their atmospheres.
the speed of water at the tap of lower storey is more than that in the upper storey
Answer:
Pressure of liquid in container is given by, P= height × density × acceleration of gravity.
At the lower storey, the height of the liquid from the open end is great, since height is directly proportional to pressure, the pressure exerted by liquid is maximum hence increase in velocity of flow.
Unlike the upper storey where the height of water is less hence the pressure exerted by the liquid is minimum which decreases the velocity / speed of liquid flow
The speed of water in the upper story will be lower than the lower storey because the kinetic energy of water in the upper storey will be less than that in lower storey.
What is kinetic energy?Kinetic energy of an object is generated by virtue of the motion of the object. Whereas potential energy of the object is formed by virtue of the position of the object.
Kinetic energy depends on the mass of velocity of the object by the equation:
KE = 1/2 Mv²
Potential energy of a body p = Mgh
where, m is mass, g is acceleration due to gravity and h be the height of the object from the surface.
Water at the tap of upper storey is at more height from the surface and thus, having greater potential energy than that in lower storey. Hence, the flow of water will be reduced since it possess more potential energy than kinetic energy.
To find more on potential energy, refer here;
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Calculate the electric field when the forces is 2N and the medium is mica
Answer:
E₀ = 5.97 10⁸ N / C
Explanation:
Coulomb's law in a material medium is written
[tex]F = \frac{1}{4\pi \epsilon } \frac{q_{1} q_{2} }{r^{2} }[/tex]
ε is the electrical permittivity of the material
Electric field and force are related
F = q E
in dielectric materials such as mica there is an electric field inside the material that decreases the external field
E = E₀ /ε
where ε is the electrical permittivity of the material; in general it is tabulated in the form
[tex]\epsilon _{r} =\frac{\epsilon}{\epsilon_{o}}[/tex]
[tex]\epsilon = \epsilon_{r} \ \epsilon_{o}[/tex]
we substitute
F = q E₀ / \epsilon_{r} \epsilon_{o}
[tex]E_{o} = \frac{F \ \epsilon_{r} \ \epsilon_{o} }{q}[/tex]
for the case of mica it is equal to er = 5.4 and suppose a test charge equal to the charge of the electron
we calculate
E₀ = 2 5.4 8.85 10⁻¹² / 1.6 10⁻¹⁹
E₀ = 59.74 10⁷
E₀ = 5.97 10⁸ N / C
Bolt starts the race not moving, but then increased his speed until he reaches a top speed. Once Bolt reaches his top speed he maintains that speed for a few seconds to:
a) move at a constant velocity
b) accelerating by moving faster
c) accelerating by moving slower
Is it a, b, or c?
Answer:
a) move at a constant velocity
Explanation:
The transfer of heat by the movement of a fluid is called:
A.
Conduction
B.
Radiation
C.
Convection PLS HELP ASAP!!!
Answer: C
Explanation:
Convective heat transfer, or convection, is the transfer of heat from one place to another by the movement of fluids, a process that is essentially the transfer of heat via mass transfer.
A bag of sugar weights 20 N on the earths surface. If you double the distance from the center of the earth, the bag now weighs what
MUSIC
Progressions can start on any number of chords but usually end on the I.
true or false
Answer:
true
Explanation:
Answer:
false
Explanation:
Voltage has been described as similar to the water in the water pipes in your home. What other analogy can you think of that is similar to voltage?
Two lamps rated 60W; 240V and 100W, 240Vrespectively are connected in series to a 240V power source. Calculate;
a) The resistance of each lamp.
b) The effective resistance of the circuit.
c) The current passing the lamps. pls answer correctly
Answer:
See the answers below.
Explanation:
The total power of the circuit is equal to the sum of the powers of each lamp.
[tex]P=60+100\\P=160 [W][/tex]
Now we have a voltage source equal to 240 [V], so by means of the following equation we can find the current circulating in the circuit.
[tex]P=V*I[/tex]
where:
P = power [W]
V = voltage [V]
I = current [amp]
[tex]I = P/V\\I=160/240\\I=0.67 [amp][/tex]
So this is the answer for c) I = 0.67 [amp]
We know that the voltage of each lamp is 240 [V]. Therefore using ohm's law which is equal to the product of resistance by current we can find the voltage of each lamp.
a)
[tex]V=I*R[/tex]
where:
V = voltage [V]
I = current [amp]
R = resistance [ohms]
Therefore we replace this equation in the first to have the current as a function of the resistance and not the voltage.
[tex]P=V*I\\and\\V = I*R\\P = (I*R)*I\\P=I^{2}*R[/tex]
[tex]60 = (0.67)^{2}*R\\R_{60}=133.66[ohm] \\and\\100=(0.67)^{2} *R\\R_{100}=100/(0.66^{2} )\\R_{100}=225 [ohm][/tex]
b)
The effective resistance of a series circuit is equal to the sum of the resistors connected in series.
[tex]R = 133.66 + 225\\R = 358.67 [ohms][/tex]
‼️can someone help me‼️
• What are the other two ways that you can rewrite the
formula F=ma?
• If I push a wheelbarrow, with a force of 240 N, with an
acceleration of 4 m/s2, how much mass does the
wheelbarrow have? (Solve using formula F=ma)
Answer:
Part A:
The other two ways we can rewrite F = m·a are;
1) F = dp/dt
2) F = m × d(v)/dt
Part B:
The mass of the wheelbarrow is 60 kg
Explanation:
Part A:
The other two ways of rewriting the equation are;
1) Force as the rate of change of momentum, F = dp/dt = d(m·v)/dt and
2) From the above equation, where, m is constant, we have;
F = d(m·v)/dt = m × d(v)/dt
∴ F = m × d(v)/dt
Part B:
The force with which we push the wheelbarrow = 240 N
The acceleration, a, given to the wheelbarrow (by the applied force) = 4 m/s²
From F = m × a
Where;
m = The mass of the wheelbarrow
m = F/a = 240 N/(4 m/s²) = 60 kg
The mass of the wheelbarrow = m = 60 kg.
Which of the following best describes why understanding a watershed and its boundaries is important in designing housing developments along a river?
A
The water contained in a watershed is more likely to become polluted if the soil has high permeability, so it is important to locate all point sources to reduce contamination
B
Watersheds provide habitats for hundreds of marine species, so it is important to protect their feeding and nesting sites when designing housing for humans.
c
Watersheds provide space for cultivating land to produce food and other products, so it is important to avoid locating a housing development on the most fertile land.
D
Surface water and stormwater runoff will drain downstream within the watershed boundaries, so it is important to understand the flow of water through the watershed
Answer:
d
Explanation:
The watersheds are the major hydrological structures that supports the downstream of surface water and storm water. Hence, option (D) is correct.
The given problem is based on the concept and fundamentals of watershed boundary. The watershed boundary is defined as the topmost elevations surrounding the lake or river segment, such that the drop of water falling outside the boundary will drain to another watershed.
Watersheds are the naturally occurring boundaries that determine into which streams, rivers, and oceans water naturally flows.It is necessary to plot out the concept of watershed because the surface water and storm water runoff will drain downstream within the watershed boundaries.Thus, we can conclude that the watersheds are the major hydrological structures that supports the downstream of surface water and storm water. Hence, option (D) is correct.
Learn more about the watershed boundary here:
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Work is a _______ acting upon an object for a given ______. The amount of work done is equal to the change in ________ of the object.
Answer:
Work is a FORCE acting upon an object for a give DISTANCE. The amount of work done is equal to the change in KINETIC ENERGY of the object.
Explanation:
The answer is from the definition and equations for work:
Work = force*distance = change in kinetic energy
Answer:
energy
Explanation:
i took the quiz
which term describe the substance that forms when two or more types of atoms join?
A. element
B. compound
C. composite
D. mixture
Answer:
A. element
Explanation:
A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.
Does an object with constant speed also have constant velocity?. Single choice.
Answer: No, constant speed does not mean constant velocity.
A classic often used example would be to consider a car driving in circles. If the speedometer reads say 20 mph the entire time, then the speed of the car is held constant (ie the same). But the velocity is changing because velocity measures direction along with speed. The car is changing direction as it moves in a circle.
Section 1: Experimental Overview
Use your answers from questions 1-3 as the basis for the first section of your lab report. This section provides your reader with background information about why you conducted this experiment and how it was completed. Outline the steps of the procedure in full sentences. It also provides potential answers (your hypothesis/es) relative to what you expected the experiment to demonstrate. This section should be 1-3 paragraphs in length.
Answer:
1-state what the lab is about, that is, what scientific concept (theory, principle, procedure, etc.) you are supposed to be learning about by doing the lab. You should do this briefly, in a sentence or two. If you are having trouble writing the opening sentence of the report, you can try something like: "This laboratory experiment focuses on X…"; "This lab is designed to help students learn about, observe, or investigate, X…." Or begin with a definition of the scientific concept: "X is a theory that…."
2-give the necessary background for the scientific concept by telling what you know about it (the main references you can use are the lab manual, the textbook, lecture notes, and other sources recommended by the lab manual or lab instructor; in more advanced labs you may also be expected to cite the findings of previous scientific studies related to the lab). In relatively simple labs you can do this in a paragraph following the initial statement of the learning context. But in more complex labs, the background may require more paragraphs.
Explanation:
what element is oco in physics
Answer:
Answer:
Carbon Dioxide
A 2.3 kg mass oscillates back and forth from the end of a spring of spring constant 120 N/m. Depending on that x max =0.7 calculate the total energy
Answer:
42.69J
Explanation:
The question is not complete, here the complete one
A 2.3 kg mass oscillates back and forth from the end of a spring of spring constant 120 N/m. Depending on that x max =0.7 calculate the total energy
and it velocity vx= -3.4m/s
Step one:
given
mass m= 2.3kg
spring constant k= 120 N/m
x= 0.7m
vx=-3.4m/s
Step two:
The expression for the total energy is
[tex]Energy= 1/2mv^2 + 1/2Kx^2[/tex]
substituting we have
[tex]Energy= 1/2*2.3*3.4^2+1/2*120*0.7^2[/tex]
[tex]Energy= 13.29+29.4\\\\Energy=42.69J[/tex]
A metre rule is used to measure a length. Which reading is shown to the nearest millimetre? A 0.7m B 0.76m C 0.761m D 0.7614m
Answer:
none
Explanation:
~both of them show to the nearest metre.
~millimeter has (mm) unit eg 0.7mm
0.76cm is the correct answer
bcoz after Mili metre there is centi metre so option c is correct
[tex]\frak{\huge{Mark \: me \: brainliest}}[/tex]
Why do these two magnets attract each other?
A. The poles that face each other are opposite magnetic poles.
B. The poles of one magnet cause the other magnet to have a
magnetic field.
C. The magnetic fields leave the magnets and concentrate between
them.
D. The magnetic field is weaker between the two magnets.
Answer:
A
Explanation:
When two magnets are brought near each other, like poles repel; opposite poles attract. We like to represent this force effect of a magnet on iron-like objects with a concept called magnetic field. The concept of field can be best understood if we remember the gravitational force of Earth on object near it.
Every magnet has two poles. The same pole repels while opposite poles attract each other. Option (A) is correct. The poles that face each other are opposite magnetic poles.
What is a magnet?A magnet is a substance or item that generates a magnetic field. This magnetic field is invisible, but it is responsible for a magnet's most remarkable property.
A force that attracts or repels other ferromagnetic elements such as iron. Every magnet has two poles. The same pole repels while opposite poles attract each other.
Due to polarity Option (A) is correct. Hence the poles that face each other are opposite magnetic poles.
To learn more about the magnets refer to the link;
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Calculate the speed with which you would have to throw a rock to put it into orbit around the asteroid 234 Ida near its surface, assuming 234 Ida is spherical. Ida’s mass is 4 × 1016 kg and its radius is 16 km.
Answer:
The speed with which a rock would have to be thrown to put it in 234 Ida's orbit, near its surface is approximately 12.917 m/s
Explanation:
The given parameters are;
The mass of Ida, M = 4 × 10¹⁶ kg
The radius of 234 Ida, r = 16 km = 16,000 m
The speed, v, required to put a rock in 234 Ida's orbit near its surface is given by the orbital velocity equation as follows;
[tex]v = \sqrt{{\dfrac{G \times M}{r} } }[/tex]
Where;
G = The universal gravitational constant = 6.67408 × 10⁻¹¹ m³·kg⁻¹·s⁻²
Substituting the known values gives;
[tex]v = \sqrt{{\dfrac{6.67408 \times 10^{-11} \times 4 \times 10^{16}}{16,000} } } \approx 12.917[/tex]
Therefore, the speed required to put a rock in 234 Ida's orbit near its surface = v ≈ 12.917 m.
Calculate the displacement of the following components:
1 units North
2 units South
2 units North
2 units North
3 unit South
Answer:
zero displacement
its returnin to the starting point.
5 north 5 south
init.
How is 'one standard kilogram' defined in SI system?
What is weight? Write down its SI unit.
Answer:
The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015×10−34 when expressed in the unit J⋅s, which is equal to kg⋅m2⋅s−1, where the metre and the second are defined in terms of c and ΔνCs.
Answer:
The kilogram (abbreviation, kg) is the standard international (SI)system of units.it was originally defined as the mass of 1 litre(10-3 cubic meter) of pure water.At the earth's surface ,a mass of 1 kg weight approximately 2.20 pounds (IB)
Explanation:
the force of attraction exerted by the earth on a body of certain mass. It's SI unit is Newton(N).
1. What similarities do you notice
Within a group(column)?
Within a row (period)?
2. Locate the element in Period 4, Column 1.
Predict the number of valence electrons.
Predict the Lewis Dot Structure.
Answer:
1. What similarities do you notice
Within a group(column)?
Within a row (period)?
2. Locate the element in Period 4, Column 1.
Predict the number of valence electrons.
Predict the Lewis Dot Structure