Answer:
fffcdcffffdxxfxxtdyfycycycycy
Scuba divers carry ballast weights to have neutral buoyancy. At that condition, the buoyancy force on the diver exactly balances weight, and there is no tendency either to float toward the surface or to sink. In freshwater, a certain diver carries 10 lb of lead alloy ballast of density 1.1 x 104 kg/m3. During an excursion in seawater, the diver must carry 50% more ballast to remain neutrally buoyant. How much does this diver weigh
Answer:
732.96 N
Explanation:
In fresh water the diver carries ; 10 Ib of lead alloy = 44.5 N
Ballast density : 1.1 * 10^4 kg/m^3
Diver must carry 59% more ballast in seawater
first step : For fresh water
mass of lead alloy in freshwater
mf = wf /g = 44.5 N / 9.81 = 4.536 kg
Volume of lead alloy ballast in fresh water
Vf = mf / plead
= ( 4.536 ) / ( 1.1 * 10^4 ) = 4.1 * 10^ -4 m^3
Second step : For sea water
mass of alloy in seawater
Ms = Ws / g
Ws = 10 Ib + 5 Ib = 15 Ib = 66.75 N
hence ; Ms = 66.75 / 9.81 = 6.804 kg
Volume of alloy in seawater
Vs = Ms / plead = 6.804 / ( 1.1 * 10^4 ) = 6.2 * 10^-4 m^3
Next : considering the diver in freshwater with Ballast weight
= weight of diver + ballast weight (Wf) = ( pfresh * ( V + Vf ) ) * g ---- ( 1 )
where : pfresh = 1000 kg/m^3 , Vf = 4.1 * 10^-4 m^3, g = 9.81 , Wf = 44.5 N
hence equation 1 becomes
W + 44.5 = 9810 * V + 4.1
W + 40.4 = 9810 V --------------- ( 3 )
Considering Diver in seawater with Ballast weight
weight of diver + ballast weight (Ws) = ( psea * ( V + Vs ) ) * g ---- ( 2 )
where : psea = 1026 kg/m^3 , Vs = 6.2 * 10^-4 m^3 , g = 9.81 , Ws = 66.75 N
equation 1 becomes
W + 66.75 = 10065.06 * V + 6.2
W + 60.55 = 10065.06 V
∴ V = ( W + 60.55 )/ 10065.06 ( Input value into equation 3 to determine the weight of the diver )
W + 40.4 = 9810 ( ( W + 60.55 )/ 10065.06 )
10065.6 ( W + 40.4 ) = 9810 ( W + 60.55 )
10065.6 W - 9810 W = 593995.5 - 406650.24
∴ W ( weight of diver ) = 187345.26 / 255.6 = 732.96 N
What is the best explanation for how the plates move?
Answer:
Explanation:
Some geologists favor convection currents in the mantle as the best explanation for plate tectonic movement. It is reasonable to assume that the heat radiated from the core creates convection currents in the mantle, and the mantle rocks begin to move plastically.
What example is given of a location on Earth where this is occurring?
place's absolute location is its exact place on Earth, often given in terms of latitude and longitude. For example, the Empire State Building is located at 40.7 degrees north (latitude), 74 degrees west (longitude).
Place's absolute location is its exact place on Earth, often given in terms of latitude and longitude.
What is longitude?A point's longitude, which might refer to the east-west position of a point on the surface of the Earth or another celestial body, is a geographic coordinate. The Greek symbol lambda is used to represent the angular measurement, which is often given in degrees.
Latitude is a coordinate used in geography that describes a point's north-south location on the surface of the Earth or another celestial body. Latitude is measured as an angle, with 0° at the Equator and values ranging from -90° at the south pole to 90° at the north pole.
Place's absolute location is its exact place on Earth, often given in terms of latitude and longitude.
To learn more about longitude refer to the link:
brainly.com/question/28606059
#SPJ2
what do folds on a strip of paper mean
Why might the current in a short circuit be higher than the current in the original circuit?
Answer:
Hope this helps =)
Explanation:
The current in a short circuit may be very high because the resistance in the short circuit is probably less than the resistance in the original circuit.
A pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0 kg sphere suspended from a 67.0-m light cable. If the amplitude of the swing is 5.00 m, what is the maximum speed of the sphere
Answer:
13.1 m/s
Explanation: Given that a pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0 kg sphere suspended from a 67.0-m light cable. If the amplitude of the swing is 5.00 m, what is the maximum speed of the sphere
The formula to use is :
W = sqrt ( L/g )
Where
L = 67m
g = 9.8m/s^2
A = 5m
Substitute all the parameters into the formula
W = sqrt ( 67 / 9.8 )
W = 2.6
To get the maximum velocity, we use the below formula.
V = wA
V = 2.6 × 5
V = 13.07 m/s
Therefore the maximum speed of the sphere is 13.1 m/s approximately.
During an observation, it was noticed that light diffracts as it passes through small slits in a barrier. What does this evidence reveal about light?
It can travel in various wavelengths.
It can travel through the vacuum of space.
It demonstrates a behavior of energy.
It demonstrates a behavior of waves.
Answer:
It can travel in various wavelengths. brainliest?
Explanation:
The evidence that reveals about the light is that It can travel in various wavelengths.
What is diffraction?
It is the wave property that should be blending of the wave related to the corners.
At the time when the wave is bending so it passed via the openings.
Also, the light diffracted via the small slits and it should be shown to arise in the water waves and the sound waves.
hence, the first option is correct.
Learn more about light here: https://brainly.com/question/26122702
Ablock of mass m2 on arough horinzontal surfaceis connected to aball of mass m1 by alight weight cord over alight weight friction pulley as shownin figure .aforce of magnitude f at an angle
please help me with this question
Answer:
Answer is option d
Explanation:
,Mark as brainlist
How many complete wavelengths are present in the sound wave shown? O 1 o 2 4 O 6 09.
Answer:
2
Explanation:
131_I_53 is an artificially made radioactive isotope of iodine, produced during the operation of nuclear power plants and the detonation of nuclear bombs. Exposure to high concentrations of 131 53I represents a serious risk for human health. However, small doses of this radioactive isotope are put to good use in medical studies. 131 53I is widely used in treating thyroid cancer and in diagnosis of abnormal liver and kidney function.
Required:
What is emitted when the radioactive nucleus of 131_I_53 decays to form the stable isotope of xenon 131_Xe_54?
Answer:
one beta particle
Explanation:
Since the atomic number of 131_I_53 increases by one to 131_Xe_54, we have the release of a beta particle since only a beta particle can cause a change in atomic number without a change in mass number. Since a beta particle is one electron, ₋₁⁰e, our nuclear equation is
¹³¹I₅₃ → ¹³¹X₅₄ + ₋₁⁰e
The atomic and mass numbers on both sides are balanced
mass number 131 = 131 + 0 = 131
atomic number 53 = 54 - 1 = 53
Thus a beta particle is emitted
The energy photon affects which property of light
Answer:
photoelectric effect
Explanation:
When the energy from photons is absorbed by matter, the matter can emit electrons. This process is called the photoelectric effect. The photoelectric effect is a property of light that is not explained by the theory that light is a wave.
Suppose the spring constant or force constant of the spring is 32.0 N/m and a total of 2.0 kg hangs at the bottom. The mass is smacked upwards from its rest position so that it rises up by 0.40 m before it starts back down. What is the acceleration of the mass at either end of its motion
Answer:
Explanation:
Elongation in the spring when a mass of 2 kg hangs from it
k d = mg where d is the elongation
32 d = 2 x 9.8
d = .6125 m .
When it rises by .40 m , the elongation reduces to .6125 - .40 = .2125 m
upward restoring force at this point = 32 x .2125 = 6.8 N .
Its weight = 2 x 9.8 = 19.6 N acting downwards
Net force on mass of 2 kg = 19.6 - 6.8 N = 12.8 N .
acceleration in downward direction = net force / mass = 12.8 / 2 = 6.4 m/s²
At the bottommost point , total extension = .6125 + .40 = 1.0125 m
restoring force in upward direction = 32 x 1.0125 = 32.4 N .
Net force in upward direction = 32.4 - 19.6 N = 12.8 N
acceleration = 12.8 / 2 = 6.4 m /s² in upward direction .
example of nuclear fission and nuclear fusion
Answer:
In fission, energy is gained by splitting apart heavy atoms, for example uranium, into smaller atoms such as iodine, caesium, strontium, xenon and barium, to name just a few. However, fusion is combining light atoms, for example two hydrogen isotopes, deuterium and tritium, to form the heavier helium.
Explanation:
I hope this helped you
(Sorry If it didn't)
A box has a mass of 3 kg. The box is lifted from the floor and placed
on a shelf. If the box gains a Potential Energy of 100 J, then how high
is the shelf?
a 2.34 m
b 1.20 m
C 1.50 m
d 3.40 m
HALP
Explanation:
Potential energy=MGH
100=3×10×H.
H=100/30
H=3.40m
Questions on the photo
Answer:
Option C: Third Class
Explanation:
This is third class because the effort or the input force is in the middle between the fulcrum and the load.
To solve this, we must be knowing each and every concept related to lever. Therefore, due to the effort or input force being in the center between the edge as well as the load, the supplied lever is of 3rd class. The correct option is option C.
What is lever?A lever is a basic device that consists of a beam or stiff rod located at a set tight, or edge. It is used to apply force to a load and often offers a mechanical advantage.
A stiff object that can rotate about a spot on itself is called a lever. The three types of levers are categorized according to where the edge, weight, and effort are located. Due to the effort or input force being in the center between the edge as well as the load, the supplied lever is of 3rd class.
Therefore, the correct option is option C.
To learn more about lever, here:
https://brainly.com/question/2860526
#SPJ2
Can’t figure out this problem who can figure this out and give me the answer?
Which exercise type will improve a person's range of motion?
Answer:
stretching prior to an exercise is a great way to improve a range of motion, along with yoga and Pilates!
A double-slit interference pattern is created by two narrow slits spaced 0.25 mm apart. Thedistance between the first and the fifth minimum on a screen 60 cm behind the slits is 5.5mm. What is the wavelength (in nm) of the light used in this experiment
Answer:
Explanation:
Slit distance d = .25 x 10⁻³ m .
Distance of screen D = 60 x 10⁻² m
Distance between first and fifth minimum = 5.5 x 10⁻³ m .
There will be four bright fringes between first and 5 th minimum so
distance between them = 4 x λ D / d where λ is the wavelength of light .
Substituting the values
4 x λ x 60 x 10⁻² m / .25 x 10⁻³ m = 5.5 x 10⁻³ m
4 x λ x 60 x 10⁻² m = .25 x 10⁻³ m x 5.5 x 10⁻³ m = 1.375 x 10⁻⁶ m
λ = .005729 x 10⁻⁴
= 572.9 x 10⁻⁹ m
= 572.9 nm .
En un viaje ida y vuelta de 10 kilómetros, el desplazamiento y la distancia recorrida son respectivamente.
(Respuestas en la imagen)
Answer: creo que es A o D
Explanation:
pleaaaseeeee helppppp meeeee
pleaaaseeeee helppppp meeeee
pleaaaseeeee helppppp meeeee
Answer:
The Republican party was formed because they wanted??????
Explanation:
Which wavelength is most likely seen as violet light?
g An electron moves on a direction perpendicular to this page, into this page . The arrow below shows the direction of the magnetic field B present in this region. ----------------> B The direction of the magnetic force acting on the electron is directed
Answer:
force on the electron is upwards
Explanation:
The magnetic force is given by the relation
F = q v x B
the bold indicates vectors, we can write the module of this expression
F = q v B sin θ
the direction of the force is given by the right hand rule.
If we have a positive charge, the flea points in the direction of velocity, in this case towards the inside of the page.
fingers extended in the direction of the magnetite field, in our case to the right and
the palm gives the direction of the force for a positive charge, for a negative charge it is in the opposite direction. The palm points downwards, so the force on the electron is upwards
Positive electric charges are always attracted to ________ charges.
Answer:
Negative electric charges
A car battery dies not so much because its voltage drops, but because chemical reactions increase its internal resistance. A good car battery typically has a terminal voltage of about 12.5 V and an internal resistance of about 0.020 Ω. When the battery dies its voltage can drop slightly, let's say it drops to about 10.1 V and the internal resistance increases to around 0.100 Ω.
Required:
a. How much current could the good battery alone drive through the starter motor?
b. How much current is the dead battery alone able to drive through the starter motor?
Answer:
(a) I = 625 A
(b) I = 101 A
Explanation:
The relationship between current, voltage and resistance can be given by Ohm's Law:
V = IR
where,
V = Voltage
I = Current
R = Resistance
(a)
Here,
V = 12.5 V
R = 0.02 Ω
Therefore,
[tex]12.5\ V = I(0.02\ \Omega)\\\\I = \frac{12.5\ V}{0.02\ \Omega}[/tex]
I = 625 A
(b)
Here,
V = 10.1 V
R = 0.1 Ω
Therefore,
[tex]10.1\ V = I(0.1\ \Omega)\\\\I = \frac{10.1\ V}{0.1\ \Omega}[/tex]
I = 101 A
5. Which of the following is velocity? *
2 points
A. 20 m/s
B. 40 m/s east
C. 40 m
D. 20 m
Z. A force that gives a 8-kg objet an acceleration of 1.6 m/s^2 would give a 2-kg object an
acceleration of
a. 0.2 m/s2
b. 0.4 m/s2
c. 1.6 m/s2
d. 6.4 m/s2
Answer:
[tex]\boxed {\boxed {\sf D.\ 6.4\ m/s^2}}[/tex]
Explanation:
We need to find the acceleration of the 2 kilogram object. Let's complete this in 2 steps.
1. Force of 1st ObjectFirst, we can find the force of the first, 8 kilogram object.
According to Newton's Second Law of Motion, force is the product of mass and acceleration.
[tex]F=m \times a[/tex]
The mass of the object is 8 kilograms and the acceleration is 1.6 meters per square second.
m= 8 kg a= 1.6 m/s²Substitute these values into the formula.
[tex]F= 8 \ kg * 1.6 \ m/s^2[/tex]
Multiply.
[tex]F= 12.8 \ kg*m/s^2[/tex]
2. Acceleration of the 2nd ObjectNow, use the force we just calculated to complete the second part of the problem. We use the same formula:
[tex]F= m \times a[/tex]
This time, we know the force is 12.8 kilograms meters per square second and the mass is 2 kilograms.
F= 12.8 kg *m/s²m= 2 kgSubstitute the values into the formula.
[tex]12.8 \ kg*m/s^2= 2 \ kg *a[/tex]
Since we are solving for the acceleration, we must isolate the variable (a). It is being multiplied by 2 kg. The inverse of multiplication is division. Divide both sides of the equation by 2 kg.
[tex]\frac {12.8 \ kg*m/s^2}{2 \ kg}= \frac{2\ kg* a}{2 \ kg}[/tex]
[tex]\frac {12.8 \ kg*m/s^2}{2 \ kg}=a[/tex]
The units of kilograms cancel.
[tex]\frac {12.8}{2}\ m/s^2=a[/tex]
[tex]6.4 \ m/s^2=a[/tex]
The acceleration is 6.4 meters per square second.
What is reflection of light
Answer: When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light. The incident light ray which lands upon the surface is said to be reflected off the surface. The ray that bounces back is called the reflected ray.
Have a great day and stay safe !
A 1.2-kg mass is projected from ground level with a velocity of 31.3 m/s at some unknown angle above the horizontal. A short time after being projected, the mass barely clears a 16-m tall fence. Disregard air resistance and assume the ground is level. What is the kinetic energy of the mass as it clears the fence
Answer:
The kinetic energy will be "399.65 J".
Explanation:
Given:
Mass,
m = 1.2 kg
Velocity,
v = 31.3 m/s
The total energy of mass will be:
⇒ [tex]E=K+U[/tex]
or,
⇒ [tex]E=.5mv^2+mgh[/tex]
By putting the values, we get
[tex]=.5(1.2)(31.3)^2+0[/tex]
[tex]=0.6\times 979.69+0[/tex]
[tex]=587.81 \ J[/tex]
Since,
The system's total energy is unchanged, then
⇒ [tex]E=K+U[/tex]
or,
⇒ [tex]E=K+mgh[/tex]
[tex]587.81=K+1.2(9.8)(16)[/tex]
[tex]587.81=K+188.16[/tex]
[tex]K=587.81-188.16[/tex]
[tex]=399.65 \ J[/tex]
A 3 Volt battery is connected in series to three resistors: 4,6, and 2. Find the total resistance.
Answer:
The same current flows through each resistor in series. Individual resistors in series do not get the total source voltage, but divide it. The total resistance in a series circuit is equal to the sum of the individual resistances: RN(series)=R1+R2+R3+…