Answers
A prudent diet can help prevent obesity, heart disease, and diabetes. The correct option is D.
What are obesity, heart disease, and diabetes?Obesity is caused by consuming more calories than the body can burn off, leading to excess body fat. A diet that is high in whole, nutrient-dense foods like fruits, vegetables, lean protein, and healthy fats can help prevent obesity by providing the body with the nutrients it needs while keeping calorie intake in check. Avoiding processed foods that are high in added sugars and unhealthy fats can also help prevent weight gain.
Heart disease is a leading cause of death worldwide, and it is often caused by a buildup of plaque in the arteries that supply blood to the heart. A diet that is low in saturated and trans fats, added sugars, and salt and high in fiber, whole grains, fruits, and vegetables can help prevent heart disease by reducing cholesterol levels and blood pressure, both of which contribute to plaque buildup.
Diabetes is a chronic disease characterized by high blood sugar levels, and it is caused by the body's inability to produce or properly use insulin. A diet that is low in added sugars, processed foods, and refined carbohydrates and high in fiber, whole grains, lean protein, and healthy fats can help prevent diabetes by regulating blood sugar levels and reducing insulin resistance.
Therefore, a prudent diet that is high in whole, nutrient-dense foods and low in processed foods, added sugars, unhealthy fats, and salt can help prevent obesity, heart disease, and diabetes.
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Related Questions
How do i solve this problem? Hint: The cannonball is being launched vertically upwards, therefore, there is no initial horizontal speed. The given initial speed will also be the initial vertical speed.
Answers
The initial velocity of the ball is given as 36.0 m/s.
The horizontal component of velocity of ball is given as,
\(v_x=v\cos \theta\)The ball is projected vertically, therefore, the angle made by ball is 90 degree.
Plug in the known values,
\(\begin{gathered} v_x=(36.0m/s)cos90^{\circ} \\ =(36.0\text{ m/s)(0)} \\ =0\text{ m/s} \end{gathered}\)Therefore, the initial horizontal velocity of ball is 0 m/s.
The vertical component of velocity of ball is given as,
\(v_y=v\sin \theta\)Plug in the known values,
\(\begin{gathered} v_y=(36.0m/s)\sin 90^{\circ} \\ =(36.0\text{ m/s)(1)} \\ =36.0\text{ m/s} \end{gathered}\)Therefore, the initial vertical velocity of the ball is 36.0 m/s.
Pls Help FAST
Brainliest
Answers
Answer:
1. S
2.×
3.×
4.×
I hope this can help u
A metal wire of length 1cm and of uniform diameter has a resistance of 0.8 ohms. What is the resistance of a 50cm wire coil made of the same material but having twice its diameter?
Answers
Answer:
20
Explanation:
R= resistance P = resistivity
L = length A = area
0.8 = 1cm/A
R = J l/A => 0.8* 50*A/A
=> 0.8 * 25
=> 20
Answer:
Resistance is directly proportional to length, inversely proportional to cross-sectional area. Pay attention in class, and observe that even easy multiple choice questions can have only wrong answers if the setter makes a mistake.
7. An electric train moving at 20km/hrs
. Accelerates to a speed of 30km/hrs. in
20 sec, find the distance travelled in meters during the period of
acceleration
Answers
Answer
NB:
- speed, U is measure in m/s
- acceleration, a is measured in m/s²
-time t in seconds , s
Therefore conversation must be made
Speed U = 20km/hrs
=20km÷1hr
But 20km= 20×1000=20000m
1hr= 1×60min×60sec=3600s
U=20000÷3600=5.56m/s
a=30km/hrs
=30km÷1hr
But 30km=30×1000=30000
1hr=3600s
a=30000÷3600=8.33m/s²
From the equation of motion
S=Ut + ½ at².
Where s= distance
S = 5.56m/s × 20s + ½(8.33m/s²)(20s)²
S = 1777.3m
A 220g mass is on a frictionless horizontal surface at the end of a spring that has a force constant of 7.0N/m The mass is displaced 5 2m from its equilibrium position and then released to undergo simple harmonic motion.
At what displacement from the equilibrium position is the potential energy equal to kinetic energy?
Answers
Answer:
Explanation:
Your numbers seem wonky, so I'll just assume that the initial displacement is a distance A (Amplitude) from the equilibrium position. Spring constant = k
Initial potential energy is
PE = ½kA²
As potential energy and kinetic energy are constantly exchanging in SHM,
the position x where half of the original spring potential exists is found where
½kx² = ½(½kA²)
x² = ½A²
x = (√0.5)A
x ≈ 0.707A
just plug in your actual starting position A
With A = 5.2 cm
x = 3.67695... 3.7 cm
Electrical energy is transformed into mechanical energy in a motor when the
electromagnet consistently turns in the same direction. What part of the
motor causes this motion?
A. The loop of wire
B. The permanent magnets
C. The commutator
D. The battery
Answers
Answer:
the commutator
Explanation:
took the quiz!
The part of the motor that causes the consistent motion of the electromagnet in the same direction is the commutator. The correct answer is C. The commutator.
The commutator is a critical component in a motor that enables the conversion of electrical energy into mechanical energy. It consists of a set of copper segments connected to the rotating coil or armature of the motor. As the armature spins, the commutator ensures that the electrical current flowing through the coil changes direction at the right time.
This change in current direction creates a rotating magnetic field that interacts with the permanent magnets, resulting in a continuous rotational motion of the motor. In essence, the commutator acts as a switch, controlling the flow of current and ensuring the electromagnet rotates in a consistent direction.
Therefore, the part of the motor that causes this motion is C. The commutator.
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A wave travels at a speed of 242 m/s. If the distance between crests is 0.11
V
m, what is the frequency of the wave? Use / =
A. 0.00045 Hz
B. 190 Hz
c. 27 Hz
D. 2200 Hz
Answers
The correct answer is D. 2200 Hz
Explanation:
The frequency of a wave is measured in hertz (Hz) and refers to how often a wave passes through a point during a specific time. This factor can be calculated if you divide the velocity of the wave by the wavelength (distance between crests) this means f (frequency) = v (velocity) / λ (wavelength).
f (frequency) = 242 m/s (velocity) / 0.11 (wavelegth)
f = 2200 Hz
According to this, the frequency of the wave, in this case, is 2200 Hz
If a sound wave has a wavelength of 7 m and travels at a speed of 330 m/s, what is the
frequency of the sound?
O 47.1 hz
O2.12 hz
2.31 hz
23.1 hz
Answers
Answer:
047.1
Explanation:
frequency equals velocity over lambda
4) Collision in which K.E and momentum of system remain same is called__________
(*)Elastic Collision
(*) Inelastic collision
(*) Conserved collision
(*) Linear collision
Answers
A collision that is elastic occurs when there is no net loss of kinetic energy in the system as a result of the collision. Kinetic energy and momentum are both conserved in elastic collisions.
Give an example of an elastic collision.When two balls collide at a pool table, that is an instance of an elastic collision. When you throw a ball on the ground and it bounces back into your hand, there is no net change in the kinetic energy, making it an elastic collision.
Give an illustration of what an elastic collision is.Two balls colliding at a pool table is an example of an elastic collision. When a ball is tossed to the ground and subsequently returns to your hand, there is no net change in the kinetic energy, making it an elastic collision.
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A baseball is popped straight up into the air and has a hang-time of 6.25 S.
Determine the height to which the ball rises before it reaches its peak. (Hint: the
time to rise to the peak is one-half the total hang-time.)
Answers
Answer:
To determine the height to which the ball rises before it reaches its peak, we need to know the initial velocity of the ball and the acceleration due to gravity. Let's assume the initial velocity of the ball is v and the acceleration due to gravity is g.
The time it takes for the ball to reach its peak is one-half the total hang-time, or 1/2 * 6.25 s = 3.125 s.
The height to which the ball rises can be calculated using the formula:
height = v * t - (1/2) * g * t^2
Substituting in the values we know, we get:
height = v * 3.125 s - (1/2) * g * (3.125 s)^2
To solve for the height, we need to know the value of v and g. Without more information, it is not possible to determine the height to which the ball rises before it reaches its peak.
Explanation:
Answer:
Approximately \(47.9\; {\rm m}\) (assuming that \(g = 9.81\; {\rm m\cdot s^{-2}}\) and that air resistance on the baseball is negligible.)
Explanation:
If the air resistance on the baseball is negligible, the baseball will reach maximum height at exactly \((1/2)\) the time it is in the air. In this example, that will be \(t = (6.25\; {\rm s}) / (2) = 3.125\; {\rm s}\).
When the baseball is at maximum height, the velocity of the baseball will be \(0\). Let \(v_{f}\) denote the velocity of the baseball after a period of \(t\). After \(t = 3.125\; {\rm s}\), the baseball would reach maximum height with a velocity of \(v_{f} = 0\; {\rm m\cdot s^{-1}}\).
Since air resistance is negligible, the acceleration on the baseball will be constantly \(a = (-g) = (-9.81\; {\rm m\cdot s^{-2}})\).
Let \(v_{i}\) denote the initial velocity of this baseball. The SUVAT equation \(v_{f} = v_{i} + a\, t\) relates these quantities. Rearrange this equation and solve for initial velocity \(v_{i}\):
\(\begin{aligned}v_{i} &= v_{f} - a\, t \\ &= (0\; {\rm m\cdot s^{-1}}) - (-9.81\; {\rm m\cdot s^{-2}})\, (3.125\; {\rm s}) \\ &\approx 30.656\; {\rm m\cdot s^{-1}}\end{aligned}\).
The displacement of an object is the change in the position. Let \(x\) denote the displacement of the baseball when its velocity changed from \(v_{i} = 0\; {\rm m\cdot s^{-1}}\) (at starting point) to \(v_{t} \approx 30.656\; {\rm m\cdot s^{-1}}\) (at max height) in \(t = 3.125\; {\rm s}\). Apply the equation \(x = (1/2)\, (v_{i} + v_{t}) \, t\) to find the displacement of this baseball:
\(\begin{aligned}x &= \frac{1}{2}\, (v_{i} + v_{t})\, t \\ &\approx \frac{1}{2}\, (0\; {\rm m\cdot s^{-1}} + 30.565\; {\rm m\cdot s^{-1}})\, (3.125\; {\rm s}) \\ &\approx 47.9\; {\rm m}\end{aligned}\).
In other words, the position of the baseball changed by approximately \(47.9\; {\rm m}\) from the starting point to the position where the baseball reached maximum height. Hence, the maximum height of this baseball would be approximately \(47.9\; {\rm m}\!\).
Compare(how they are the same) and contrast(how they are different) psychoanalysis and behaviorism as two of the early schools of psychology. Offer the major names associated with each and explain how each explained behavior.
Answers
Abstract of American Intercontinental University
This paper will compare and contrast three of the 10 main early psychology views. This assignment's three approaches are behavioral, humanistic, and cognitive. Three Early Psychology Perspectives are compared and contrasted. Psychology, like anything else, offers a plethora of theories and methods. One idea may be beneficial to one patient while being ineffective to another. The trick is to discover the optimal method for each patient. The concept that behaviors arise as a result of conditioning is known as behaviorism. This theory does not acknowledge the presence of interior mental factors such as thoughts, feelings, and moods, nor does it take free will into account.
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Two charges are placed on the x axis. One of the charges (q1 = +6.27μC) is a x = +3.00 cm and the other (q2 = -20.4 μC) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) +6.00 cm.
I am understanding part a but I am lost on part b.
Answers
Answer:
direction of the net electric field will depend on the signs and locations of the charges. If the net electric field is positive, it means the field points away from the charges. If the net electric field is negative, it means the field points towards the charge
Explanation:
E = k * q / r^2
where E is the electric field, k is the electrostatic constant (8.99 x 10^9 N m^2/C^2), q is the charge, and r is the distance from the charge to the point where we want to find the electric field.
Let's calculate the net electric field at the given points:
(a) x = 0 cm:
For the first charge, q1 = +6.27 μC, the distance r1 = 3.00 cm = 0.03 m.
The electric field due to q1 at x = 0 cm is:
E1 = k * q1 / r1^2
For the second charge, q2 = -20.4 μC, the distance r2 = 9.00 cm = 0.09 m.
The electric field due to q2 at x = 0 cm is:
E2 = k * q2 / r2^2
To find the net electric field, we need to add the electric fields vectorially:
E_net = E1 + E2
(b) x = +6.00 cm:
For the first charge, q1 = +6.27 μC, the distance r1 = 6.00 cm = 0.06 m.
The electric field due to q1 at x = +6.00 cm is:
E1 = k * q1 / r1^2
For the second charge, q2 = -20.4 μC, the distance r2 = 6.00 cm = 0.06 m.
The electric field due to q2 at x = +6.00 cm is:
E2 = k * q2 / r2^2
To find the net electric field, we need to add the electric fields vectorially:
E_net = E1 + E2
a healthy person has a body temperature of 37 degree celsius. if they jump into an ice bath after sports training their temperature only decreases slowly. how can you explain this when a lump of metal at 37 celsius degree placed in the same ice bath cools down to 0 celsius degree in only a couple of minutes
Answers
1. Heat Capacity: The heat capacity of the human body is much higher than that of a small lump of metal. The human body has a large mass and contains a significant amount of water, which has a high heat capacity. This means that it requires more energy to change the temperature of the body compared to a small metal object. As a result, the body cools down more slowly in the ice bath.
2. Insulation: The human body is well-insulated with layers of skin, fat, and clothing. These layers act as thermal barriers and slow down the transfer of heat between the body and the surroundings. On the other hand, a small metal object does not have any significant insulation, allowing heat to transfer more rapidly to the colder environment.
3. Biological Regulation: The human body has mechanisms to regulate its temperature, such as vasoconstriction (narrowing of blood vessels) and shivering, which help generate heat and maintain core temperature. These regulatory processes help to slow down the cooling process and preserve the body's temperature within a narrow range.
4. Surface Area-to-Volume Ratio: The surface area-to-volume ratio is higher for a small lump of metal compared to a human body. A higher surface area facilitates faster heat transfer. Since the metal object has a relatively larger surface area compared to its volume, it cools down more quickly in the ice bath.
Overall, the combination of the human body's higher heat capacity, insulation, biological regulation, and lower surface area-to-volume ratio compared to a small metal object contributes to the slower cooling rate when immersed in an ice bath.
I get angry and throw a pen straight down to the floor. I throw it with an initial speed of 25 m/s. It took 0.25 second to fall. What is the velocity of the pen just before it hit the floor?
Answers
v2=u2+2as
v2=0×2×25×0.25
v2=25×0.25
v2=6.25m/s2
Ramesh takes out two bucketfuls of water from a well and
brings home. His father asks him which one of the buckets
has more water? At this moment, how does Ramesh finc
which bucket has more water? Explain.
Answers
Answer:
Both
Explanation:
Because Ramesh has said that there are two buckets full of water
By comparing the weight of the two buckets, he can conclude which one has more water.
Which bucket has more water?We know that we have two full buckets of water, but we do not know if both buckets have the same volume.
The only way to determine which bucket has more water is to see which one is heavier (more water means more mass, which means more weight).
Then Ramesh can lift both buckets a little bit, and with that, he can estimate which one is heavier. And with that, he can conclude which one has more water.
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The input and output forces for four machines are shown in the table. Machine Forces Machine Input Force (N) Output Force (N) 1 5 50 2 10 50 3 25 50 4 50 50 Which machine would have the greatest mechanical advantage? Responses 1 1 2 2 3 3 4
Answers
Machine 1 has the greatest mechanical advantage among the given machines. To determine the machine with the greatest mechanical advantage, we need to calculate the mechanical advantage for each machine.
Machine 1: Mechanical Advantage = Output Force / Input Force = 50 N / 5 N = 10
Machine 2: Mechanical Advantage = Output Force / Input Force = 50 N / 10 N = 5
Machine 3: Mechanical Advantage = Output Force / Input Force = 50 N / 25 N = 2
Machine 4: Mechanical Advantage = Output Force / Input Force = 50 N / 50 N = 1
Comparing the mechanical advantages, we can see that Machine 1 has the highest mechanical advantage of 10. This means that Machine 1 can multiply the input force by 10 to produce the output force. It provides the greatest amplification of force among the four machines.
Machine 2 has a mechanical advantage of 5, Machine 3 has a mechanical advantage of 2, and Machine 4 has a mechanical advantage of 1. Therefore, Machine 1 has the greatest mechanical advantage among the given machines.
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If a 8.1g ring is heated using 10.0 ), its temperature rises 21.7°C. Calculate the specific
heat capacity of the ring.
Answers
Someone Please HELP QUICK
Answers
The total distance traveled by the skier is 160 m.
option C.
What is distance?Distance is a measure of how far apart two objects or points are. It can be defined as the numerical value of the physical space between two objects or points.
Distance can be measured in a variety of units, such as meters, feet, miles, or kilometers, depending on the system of measurement used.
Distance can also refer to the length of a path between two points, which can be a straight line or a curved line.
The total distance traveled by the skier is calculated as follows;
total distance = distance ( 0 min) + distance (1 min) + distance (2 min) + distance ( 3 mins)
total distance = 0 m + (120 m - 0 m) + ( 160 m - 120 m )
total distance = 0 m + 120 m + 40 m = 160 m
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25%of what number is 21? Explain
Answers
Answer:
84
Explanation:
First convert
25
%
to its decimal number.
25
%
=
25
100
=
1
4
=
0.25
25
%
"of" a number means to multiply
25
%
by that number. Let
x
be the number.
0.25
x
=
21
Divide both sides by
0.25
.
0.25
1
0.25
1
x
=
21
0.25
Simplify.
x
=
84
I only need question 12 answered
Answers
A vector's length is considered to be its magnitude. A is used to represent the vector's magnitude.
A vector's magnitude can be determined in what ways?|v| =(x2 + y2) is the formula to calculate a vector's magnitude in two dimensions, where v = (x, y). From the Pythagorean theorem, this formula was obtained. In three-dimensional space, the formula to calculate a vector's magnitude is V = (x, y, z).A vector's length is considered to be its magnitude. A is used to represent the vector's magnitude. For more details on a vector's magnitude, see to its introduction. On this page, formulas for the magnitude of vectors in two and three dimensions in terms of their coordinates are developed.To learn more about vector's length refer to:
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The angle measured anticlockwise from the +x axis can be used to find vector components as well. In that instance, the x-component and y-component, respectively, will always be cos and sin.
How do you find the x and y components of a vector given velocity?The components of velocity v x=v cos and v y=v sin, where v is the magnitude of the velocity and is its direction in relation to the horizontal, have magnitudes of v x=v cos and v y=v respectively.Fill in a and b in the formula \(|v|=a_2+b_2 | v |=a_2 + b_2\) for a vector with the values a and b. Step 2: Underly the square root first, and then simplify the square root as much as you can, to simplify the magnitude\(|v|=a_2+b_2 | v |=a_2 + b_2\). Finding the horizontal component requires multiplying the vector's magnitude by the cosine of the vector's angle, and finding the vertical component requires multiplying the vector's magnitude by the sine of the vector's angle.To learn more about vector refer to :
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a lamp with flux 1400 lm, has an intensity of
a.) 1400 cd
b.) 100 cd
c.) 1000 cd
d.) 111 cd
Answers
Anorexia nervosa is generally a problem found in young girls.
True
False
Answers
Answer:
true
Explanation:
depends on how young it starts usually at age 10 or 12 sometimes 13 are the most common ages to start this
Which term is the product of force and distance? power work net force acceleration please help
Answers
Answer: WORK
Explanation:
Answer:
work
Explanation:
got it right on edge:p
Imagine you made a little pendulum by tying a 6.0 gram washer to a thin piece of thread and dangled it from your hand as you were given a test drive in a sports car. If the driver floored the engine and the car went from 0 to 60 mph down a straight level road in 3.2 seconds, how far off vertical would the washer hang as the car accelerated
Answers
Answer:
The displacement of the pendulum from equilibrium position is 0.855 of the length of the pendulum.
Explanation:
A pendulum's motion can be modelled as a simple harmonic motion and the differential equation describing simple harmonic motion is given as
(d²x/dt²) + (k/m)x = 0
(d²x/dt²) = acceleration of the pendulum
x = displacement of the pendulum from equilibrium position
k = spring constant of the pendulum = (mg/L) = (0.006×9.8/L) = (0.0588/L)
L = length of the pendulum
m = mass of the pendulum = 6 g = 0.006 kg
(k/m) = (g/L) = (9.8/L)
To calculate the pendulum's acceleration
Initial velocity of the car = 0 mph = 0 m/s
Final velocity of the car = 60 mph = 26.822 m/s
Time taken for velocity change = 3.2 s
Acceleration = (Δv/Δt) = (26.822/3.2) = 8.382 m/s²
(d²x/dt²) + (k/m)x = 0
Becomes
8.383 + (9.8/L)x = 0
(9.8x/L) = -8.382
9.8x = -8.382L
x = -(8.382/9.8) = -0.855 L (the minus sign shows the direction of movement of the pendulum)
Ignoring the sign and only focusing on the magnitude of the pendulum's displacement from equilibrium position, the displacement of the pendulum from equilibrium position is 0.855 of the length of the pendulum.
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determine the resultant force that water exerts on the overhang sea wall along abc. the wall is 2 m wide.
Answers
The resultant force that water exerts on the overhang sea wall along abc is 179 kN.
What is force?Force is a physical quantity that describes the interaction between two objects, such as a push or a pull. It is defined as any influence that causes an object to undergo a change in motion or deformation. Force is a vector quantity, meaning that it has both magnitude (size or strength) and direction.
Component that is horizontal. Because AB is horizontal, there is no horizontal component. The horizontal component of BC's force is.
(Fbc)h =γwhˉA=(1000kg/m3)(9.81m/s2)(1.5m+21(2m))(2m(2m))=98.1(103)N.
Component that is vertical. The weight of the water contained in blocks Abefa and Bcdeb (shown shaded in Fig. a) is equal to the force on AB and the vertical component of the force on BC. Here,
Aabefa=1.5m(2.5m)=3.75m2and
2Abcdeb=(3.5m)(2m)–4π(2m)2=(7–p)m2. Then,
Fab=γwVabefa=(1000kg/m3)(9.81m/s2)[(3.75m2)(2m)] =73.575(103)N=73.6N (FBC)v=γwVbcdeb=(1000kg/m3)(9.81m/s2)[(7–π)m2(2m)] =75.702(103)N
Therefore,
Fbc=(Fbc)²h2+(Fbc)²v2=√[98.1(10³)N]²+[75.702(10³)N]²=123.91(10³)N=124KN
FR² =(Fbc)²H2+[Fab+(Fbc)v]²
==[98.1(10³)N]² + [(73.6(10³)N)²+75.702(10³)N²]
=178.6(10³)N = 179 kN.
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what is the value of pi(8.104)^2 written with correct significant numbers
Answers
Answer:206.3
Explanation:
1. A 10kg ball moving at a speed of 6 m/s strikes another 5kg ball at rest with a contact time of 0.5 seconds. The 10kg comes to a complete stop. (a) What average force was exerted on the 10kg ball? (b) What average force was exerted on the 5kg ball? (c) What is the final momentum of the 5kg ball? (d) What is the initial momentum of the 10kg ball?
Answers
a)average force was exerted on the 10kg ball= -120 N
b)average force was exerted on the 5kg ball= 60N
c)What is the final momentum of the 5kg ball= 2.5 kg m/s
d) the initial momentum of the 10kg ball=60 kg m/s
The average force can be calculated by formula F=m(vf–vi)/ Δt so, 10 (0-6)/0.5 = -120 N the minus is representing opposite direction
the average force on the 5 kg ball = 5(6-0)/0.5= 60 N
The final momentum of 5 kg ball is 5 X 0.5 =2.5 kg m/s and initial momentum of 10 kg ball = 10 X 6 = 60 Kg m/s.
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A person is driving a car down a straight road. The instantaneous acceleration is constant and in the direction of the car's motion. 1) The speed of the car is increasing. decreasing. constant. increasing but will eventually decrease. decreasing but will eventually increase.
Answers
Answer:Increasing
Explanation:
Given
Car is driven on the straight road with instantaneous acceleration in the direction of car's motion.
If instanateneous acceleration is constant then speed of car is increasing at a constant pace. As there are no turns on the road, therefore speed of car is increasing.
The speed of the car is "decreasing". A further description is provided in the below paragraph.
It's because the individual would be in a straightforward fashion. This same acceleration inclination comes contrary to the movement of the automobile. It indicates that it exerts pressure against the movement of the automobile. So, when it moves forward, the speed of the automobile decreases.
Thus the above answer is correct.
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a 355 ml soda can is 6.2 cm in diameter and has a mass of 20 g. such a soda can half full of water is floating upright in water. What length of the can is above the water level?
Answers
The length of the can above the water level is 5.22 cm.
First determine the height of the can.
355cm3 = pi * r2 * l Volume of cylinder formula where l is length of can.
355=pi * (3.1)2 * l Where 3.1 is half of the diameter.
l = 11.76cm
Now determine the total mass of the can including the water inside.
Total mass = 20g + (355ml)/2 * 1g/ml = 177.5g, where 1g/ml is the density of water, therefore since we know half the can is full of water we take the volume of water inside, multiply it by the density and determine the mass of water. This, in addition to the weight of the can itself gives us the total mass of the floating object.
Total mass=197.5g
According to Archimedes' principle the mass of a floating object equals the mass of fluid displaced by the object.
197.5=mass of water displaced
197.5=density of water * volume of water
197.5= 1g/ml * (pi * (3.1)2 * l) where l is the length of can inside the water
6.54cm=l
So take total length of can and subtract the submerged length to retrieve the above water length.
11.76cm - 6.54cm = 5.22cm
5.22 cm of water level.
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Which of the following would you expect to be a strong electrolyte in solution?
Answers
The following would expect to be a strong electrolyte in solution (b) KCI is correct option.
When dissolved in water, a strong electrolyte produces a large concentration of ions in solution by totally dissociating into ions. The following compounds are typically strong electrolytes in solution according to this definition:
Al(OH)₃ (aluminum hydroxide) is a weak electrolyte. It does not dissociate significantly into ions in solution, resulting in a low electrical conductivity.KCl (potassium chloride) is a strong electrolyte. It completely dissociates into potassium ions (K⁺) and chloride ions (Cl⁻) in solution, resulting in a high concentration of ions and a high electrical conductivity.PbI₂ (lead(II) iodide) is a weak electrolyte. It does not dissociate significantly into ions in solution, resulting in a low electrical conductivity.These substances readily dissociate into ions in water and exhibit high electrical conductivity, making them strong electrolytes in solution.
Therefore, the correct option is (b).
The complete question is,
Which of the following would be a strong electrolyte in solution?
a) Al(OH)₃ b) KCI c) Pbl₂
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