Answer:It shows the size of the range of the moisture contents at which the soil remains plastic. In general, the plasticity index depends only on the amount of clay present. It indicates the fineness of the soil and its capacity to change shape without altering its volume.
Chris and Jamie are carrying Wayne on a horizontal stretcher. The uniform stretcher is 2.00 m long and weighs 100 N. Wayne weighs 800 N. Wayne's center of gravity is 75.0 cm from Chris. Chris and Jamie are at the ends of the stretcher. The force that Chris is exerting to support the stretcher, with Wayne on it, is:_________.a. 250 N. b. 350 N. c. 400 N. d. 550 N. e. 650 N.
Answer:
E. 650NExplanation:
step one:
given
length of stretcher= 2m
weight of stretcher=100N
Wayne weighs =800N
distance of Wayne weighs from chris's end= 75cm= 0.75m
The force that Chris is exerting to support the stretcher, with Wayne on it, can be computed by taking moments of the weight of the stretcher and Wayne weighs about Chris's end, the end result is the reaction at Chris's end
Taking moment about Chris's end
The moment of Wayne weight 75cm from Chris+ Half the weight of stretcher 1m from Chris
0.75*800+50*1=0
600+50=0
650N
What is the lift (in newtons) due to Bernoulli's principle on a wing of area 87 m2 if the air passes over the top and bottom surfaces at speeds of 260 m/s and 170 m/s respectively?
Answer:
Explanation:
According to Bernoulli's principle
P₁ + 1/2ρ v₁² + ρgh₁ = P₂ + 1/2ρ v₂² + ρgh₂ , ρ is density of air . P₁ , P₂ are pressures at two surfaces .
h₁ = h₂
P₁ - P₂ = 1/2ρ( v₂² - v₁² ) = Lift pressure
ρ of air = 1.225 kg / m³
P₁ - P₂ = 1/2ρ( v₂² - v₁² )
= .5 x 1.225 ( 260² - 170² )
= .5 x 1.225 ( 67600- 28900 )
= 23703.75 N/m²
Lift Force = pressure x area
= 23703.75 x 87
= 2062226.25 N .
A stable orbit is an orbit that repeats indefinitely, without ever changing shape. After running several simulations with differing parameters, what attributes did all the stable orbits have in common?
Answer:
All of the orbits were in the shape of an ellipse, with the orbited body on the inside of the ellipse.
Explanation:
plato
All of the orbits were in the shape of an ellipse, with the orbited body on the inside of the ellipse.
What is Kepler's law?Kepler's three laws describe how planetary bodies orbit the Sun. They describe how
Planets move in elliptical orbits with the Sun as a focus, Planet covers the same area of space in the same amount of time no matter where it is in its orbit.A planet’s orbital period is proportional to the size of its orbit (its semi-major axis).Some orbits are elliptical in shape , Knowing then that the orbits of the planets are elliptical,
Johannes Kepler formulated three laws of planetary motion, which accurately described the motion of comets as well.
Kepler's First Law: each planet's orbit about the Sun is an ellipse.
The Sun's center is always located at one focus of the orbital ellipse.
Learn more about Kepler's Law here:
https://brainly.com/question/1608361
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Which of the following best describes the motion of the object in this p-t graph? please answer quickly i'm giving 40 points.
The object is accelerating.
The object is decelerating.
The object has positive velocity.
The object is moving to the left.
Explanation:
A position time graph gives the velocity of an object. Its slope gives the velocity of an object.
In the given figure, the distance covered by an object decreases with respect to time. It means the speed decreases uniformly. So, the object is decelerating. Hence, the correct option is (b).
Answer:
The object has positive velocity
Explanation:
The steeper the slope, the greater the velocity. For example, an object moving 50 m/s, east, will have a steeper slope than an object moving 25 m/s, east. The shape of the line also describes the object's motion. A straight line indicates an object with no acceleration. The object is moving at a constant velocity. A curved line indicates an object with a changing velocity. In other words, a curved line indicates acceleration. A completely horizontal line represents an object with zero velocity. The object is not moving.
You put a room temperature metal spoon into a bowl of hot soup. What will happen to
the thermal energy of the spoon and the soup?
Answer:
the soup will transfer its thermal energy to the spoon
Hope this helps! Can you please mark me brainliest? (also can you guys answer my recent questions? thanks ^^ )
What is the acceleration of a 25 kg mass pushed by a 10 N force?
Answer:
0.4 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{10}{25} = \frac{2}{5} \\ [/tex]
We have the final answer as
0.4 m/s²Hope this helps you
Answer:
0.4 m/s²
Explanation:
hope this helps
If an object moves in a circle at a constant speed, its velocity vector will be constant. true or false
Answer:
False
Explanation:
For the vector to remain the same, the magnitude and the direction of the object must be constant. But when an object is travelling in a circular motion, it keeps on accelerating due to the change in direction, even if its motion is uniform. Quite clearly its velicity won't be constant although, its speed might be.
What is the current produced by a 9 volts battery flowing through a resistance of 2 x 10 -4 ohms?
Answer:
Current, [tex]I=45\times 10^3\ A[/tex]
Explanation:
Given that,
Voltage of a battery, V = 9 volts
Resistance, R = 2×10⁻⁴ ohms
We need to find the current flowing in the battery. Let it is I. It can be calculated using Ohm's law as follows :
V = IR
[tex]I=\dfrac{V}{R}\\\\I=\dfrac{9}{2\times 10^{-4}}\\\\I=45000\ A\\\\I=45\times 10^3\ A[/tex]
So, the current is [tex]45\times 10^3\ A[/tex].
What are the traditional states of matter, and what type of property is a matter’s state?
People who do very detailed work close up, such as jewellers, often can see objects clearly at much closer distance than the normal 25.0 cm. What is the power of the eyes of a woman who can see an object clearly at a distance of only 9.75 cm? Assume a distance from the eye lens to the retina of 2.00 cm. Number ________ diopters What is the size of the image of a 2.00 mm object, such as lettering inside a ring, held at this distance? Enter your answer as a positive number if the image is upright, and negative if it is inverted. Number ________mmWhat would the size of the image be if the object were held at the normal 25.0 cm? Number ________mm
Answer:
a) P = 60.26 diopter , b) h´ = -0.4 mm , c) h´ = -0.16 mm
Explanation:
a) For this exercise we use the equation for thin lenses
1 / f = 1 / p + 1 / q
where f is the focal length, p the distance to the object and q the distance to the image
in this case q is the distance from the lens to the retina q = 2.00 cm
the distance p is the distance from the object to the lens p = 9.75 cm
1 / f = 1 / 9.75 + 1/2
1 / f = 0.6026 cm⁻¹
power is the inverse of the focal length in meters
P = 1 / f [m]
P = 0.6026 102
P = 60.26 diopter
b) the size of the image
m = - p / q
m = - 2 / 9.75
m = -0.2 X
if we assume that the object is right
m = h´ / h
h´ = m h
h´ = -0.2 2
h´ = -0.4 mm
if the height of the object h is straight the image and inverted
c) if the object were at p = 25.0 cm
m = - 2/25
m = -0.08
h´ = -0.08 2
h´ = -0.16 mm
the image would be much smaller
Why is it impossible to create a perpetual motion machine?
Answer:
The first law of thermodynamics is the law of conservation of energy. It states that energy is always conserved. ... To keep a machine moving, the energy applied should stay with the machine without any losses. Because of this fact alone, it is impossible to build perpetual motion machines.
Explanation:
Which image shows a nonrenewable resource?
Answer:
If you see images of a gas stove burner, pinto beans, fruits & vegetables, and grain, then the answer is A or 1.
Explanation:
6. A book sits on the edge of Sammy's desk. What type of energy does the book have?
Potential energy because it could fall to the floor.
Kinetic energy because it could be moved.
Potential energy because it is not moving,
Kinetic energy because it is heavy.
Answer:
Potential energy because it is not moving
Explanation:
A book on the edge of Sammy's desk will have a potential energy because it is not moving.
Potential energy is the energy due to the position of a body.
This form of energy is the energy found in a body at rest.Potential energy = mxgxh
m is the mass of the body
g is the acceleration due to gravity
h is the height of the body
Answer:
Potential energy because it could fall to the floor.
Explanation:
It said this was the correct answer on the test and the other persons answer was incorrect.
A book sits on the edge of Sammy's desk. What type of energy does the book have?
Kinetic energy because it is heavy.
Incorrect: Potential energy because it is not moving.
Correct: Potential energy because it could fall to the floor.
Kinetic energy because it could be moved.
The electric field a distance of 10 km from a storm cloud is 1,000 N/C . What is the approximate charge in the cloud?a. 0.0011 Cb. 11 Cc. 110 Cd. 1,100 C
Answer:
The approximate charge in the cloud is 11 C
(b) 11 C
Explanation:
Given;
electric field strength, E = 1,000 N/C
separation distance, r = 10 km, = 10,000 m
Electric field strength is given by the following equations;
[tex]E = \frac{F}{q} = \frac{kq^2}{r^2}*\frac{1}{q} = \frac{kq}{r^2} \\\\q = \frac{Er^2}{k}[/tex]
where;
k is coulomb's constant = 8.99 x 10⁹ Nm²/C²
[tex]q = \frac{Er^2}{k} \\\\q = \frac{(1000)(10000)^2}{(8.99*10^9)} \\\\q = 11.12 \ C[/tex]
q ≅ 11 C
Therefore, the approximate charge in the cloud is 11 C.
Correct option is "B"
how is newtons first law of motion related to the concept of inertia?
A bottle salad dressing must be shaken before it is poured onto a salad in order to evenly mix the particles . How can this salad dressing be classified
A.colloid
B.solution
C.suspension
D.compound
Answer:
D. compound. Google says salad dressing is a compound. Sorry if it's wrong.
Explanation:
A 6.00 kg box is resting on a table. What is the magnitude of the normal force of the table on the box?
Answer:
to get it u have to multiple 6=00 time 89 to get the number 21 than plus it by 22 what is 31
When a ray of light passes through a boundary between two transparent media, it changes direction. What is this phenomenon known as?a. reflection.
b. refraction.
c. interference.
d. diffraction.
e. dispersion.
Answer:
The phenomenon is known as refraction. The correct option is B
Explanation:
Refraction is defined as the property of a change in the direction of light, when it passed from one medium to another. In the process of refraction, the direction to which the rsy of light follows changes as well as the velocity, but the frequency remains the same along the line of propagation.
The extent of propagation is determined by the nature of the medium allowing the propagation.If a ray of light hits the surface of a sheet of glass, some light will be reflected by the surface of the glass. However, much of the light will pass through the glass, because glass is transparent. This effect also o view with mediums such as water.
The reason why the light rays bends away from its normal direction is that light slows down when it passes from the less dense air into the denser glass or water.
Other properties of light includes:
--> light travels in a straight line
--> light can be reflected
--> light can be diffracted
--> light can be polarized
Help
What's the average speed of each of these???
Answer:
1) 1.15666
2)1.07
3)1.36
Explanation:
To find the average take the vaules of the numbers and add then divide by how many numbers are in the eqation and that should give you your average.
What causes a rare proxigean spring tide?
The crests of a transverse wave are like the...
A. crests of a primary wave
B. troughs of a longitudinal wave
C. rarefactions of a secondary wave
D. compressions of a longitudinal wave
The rests of a transverse wave are like the compression of the longitudinal waves.
What is transverse wave?In terms of physics, a transverse wave refers to the wave where oscillations should be perpendicular to the direction of the wave's in advance. This is in contrast to a longitudinal wave that travels in the direction of its oscillations.
Therefore, we can conclude that The rests of a transverse wave are like the compression of the longitudinal waves.
Learn more about waves here: https://brainly.com/question/1820914
What is the p.d. across a 4 resistor when there is a current of 0.3 A in it?
Answer:
1.2V
Explanation:
Given parameters:
Resistance = 4Ω
Current = 0.3A
Unknown:
Potential difference = ?
Solution:
To find the potential difference, we use the ohms law;
V = IR
Now, insert the parameters and solve;
V = 0.3 x 4 = 1.2V
How are the heating systems similar and how are they different?
Answer:
You can have gas heating systems which run on gas. You can also have electric heating systems that run on electric.
Explanation:
What is the elevation of the highest point of the hill
Answer:
Mount Everest, located in Nepal and Tibet, is usually said to be the highest mountain on Earth. Reaching 29,029 feet at its summit, Everest is indeed the highest point above global mean sea level—the average level for the ocean surface from which elevations are measured. But the summit of Mt.
- Ocean Service
Please help me out as soon as you can. Really need help.
Select ALL that apply. The stages of a human's lifespan include:
A.Infancy, early childhood, adolescence
B.High school, college
C.Adulthood, elderly
D.Workforce, retirement
Answer:
The answers are A and C
Explanation:
the order of a humans lifespan is: Infancy, early childhood, adolescence, adulthood, then elderly
When you drop a pebble into a pond, the energy from the pebble acts on the water and causes waves. What is the wave?
Group of answer choices
The water moving away
The pebble falling through the water
The visible form of energy.
Answer:
The visible form of energy
Explanation:
Watch a video on it, and took test and got it right :)
Answer:
The visible form of energy
Explanation:
Can someone please do this I’m completely lost in physics I don’t get shi, so if you have the time to go on the website and solve it please do so
Anne lifts a 9.0 kg barbell with an upward force of 120 N. What is the magnitude of the acceleration of the barbell while Anne is lifting it?
Answer:
13.33 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{120}{9} \\ = 13.3333333...[/tex]
We have the final answer as
13.33 m/s²Hope this helps you
(a) A long, straight solenoid has N turns, uniform cross-sectional area A, and length l. Show that the inductance of this solenoid is given by the equation L=μ0AN2/l. Assume that the magnetic field is uniform inside the solenoid and zero outside. (Your answer is approximate because B is actually smaller at the ends than at the center. For this reason, your answer is actually an upper limit on the inductance.) (b) A metallic laboratory spring is typically 5.00 cm long and 0.150 cm in diameter and has 50 coils. If you connect such a spring in an electric circuit, how much self-inductance must you include for it if you model it as an ideal solenoid?
Answer:
a. L = μ₀AN²/l b. 1.11 × 10⁻⁷ H
Explanation:
a. The magnetic flux through the solenoid, Ф = NAB where N = number of turns of solenoid, A = cross-sectional area of solenoid and B = magnetic field at center of solenoid = μ₀ni where μ₀ = permeability of free space, n = number of turns per unit length = N/l where l = length of solenoid and i = current in solenoid.
Also, Li = Ф where L = inductance of solenoid.
So, Li = NAB
= NA(μ₀ni)
= NA(μ₀Ni/l)
Li = μ₀AN²i/l
dividing both sides by i, we have
So, L = μ₀AN²/l
b. The self- inductance, L = μ₀AN²/l where
A = πd²/4 where d = diameter of solenoid = 0.150 cm = 1.5 × 10⁻³ m, N = 50 turns, μ₀ = 4π × 10⁻⁷ H/m and l = 5.00 cm = 5 × 10⁻² m
So, L = μ₀AN²/l
L = μ₀πd²N²/4l
L = 4π × 10⁻⁷ H/m × π(1.5 × 10⁻³ m)²(50)²/(4 × 5 × 10⁻² m)
L = 11,103.3 × 10⁻¹¹ H
L = 1.11033 × 10⁻⁷ H
L ≅ 1.11 × 10⁻⁷ H
