The mass of the sour cream that should be added is 0.68 kg.
Mass of the water
Mass of the water is calculated as follows;
mass = density x volume
density of water = 1 kg/Lmass = (1 kg/L) x 0.5 L = 0.5 kg
Conservation of energyHeat gained by the sour cream = Heat lost by the water
[tex]m_s c_s\Delta \theta _s = m_wc_w\Delta \theta _w\\\\m_s = \frac{m_wc_w\Delta \theta _w}{c_s\Delta \theta _s} \\\\[/tex]
where;
Cs is specific heat of sour creamCw is specific heat of waterΔθ is change in temperature[tex]m_s = \frac{0.5 \times 4184 \times (80 - 40)}{3510 \times (40 - 5)} \\\\m_s = 0.68 \ kg[/tex]
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Directions: Read the following excerpts carefully, then identify whether they employ informative, persuasive, or argumentative writing technique.
ENGLISH Subject:
I am really confused, might anyone know?
Hi there!
Informative writing has the intent to inform or educate us on a particular topic or event. It gives us more information and insight onto something.
Persuasive writing has the intent of convincing us to believe in a certain idea or to perform a certain action. For instance, advertisements have a persuasive intent; they are persuading us to buy a product or service.
Argumentative writing is similar to persuasive writing in the sense that they are persuading us to believe a certain idea. However, they are often based on logic and fact rather than opinions.
Let's look at the first excerpt.
This morning at 9 a.m., a school bus collided with a car at the intersection of Osmena and Cabrera streets. The passengers were not injured, but the medical personnel checked each student as well as the driver before they were transported to their school.
This text doesn't try to convince us in believing something. It doesn't argue anything and it only tries to give us more insight onto the event, which is a car accident. No opinions are stated and only events are given.
Therefore, this excerpt uses an informative writing technique.
Answer:
1. Informative
2. Persuasive
3. Informative
4. Persuasive
5. Argumentative
Explanation:
Informative is a way to inform the audience on a particular topic throughout the reading. Common examples of an informative paragraph would be to inform people on different situations around the world or a news outlet some would say.
Persuasive is a way to convince one to change/commit an act of sorts. Through persuasion you can convince your audience to look at a situation from a different perspective and perhaps convince the person to be more willing to do change the way they do something else. Common example of a persuasive paragraph would be trying to persuade someone to use less water through telling them the importance of water conservation and how water is a nonrenewable source.
Argumentative somewhat similar to persuasive but is more assertive you are trying to convince the audience why the side you're apart of is more better then the opposite side through a means of ethos, pathos, and logos. Common example of a argumentative paragraph would be something like why pizza is better then hamburgers.
Now that we know this information it's time to answer:
Excerpt one:
Excerpt one is known "informative excerpt" because we are informing the readers about how a school bus collided with a car nearby, and how thankfully none of the passengers were injured.
Excerpt two:
Excerpt two would be known as a "persuasive writing." We aren't trying to convince the audience on our side of donating blood so this won't be an argumentative writing, we are trying to persuade them by saying the benefits of how donating blood can save a person's life.
Excerpt three:
Excerpt three would be known as an "informative writing." We aren't trying to persuade or convince we are trying to inform the audience of the dangers of drinking while in high school by listing all the negative effects drinking has on a highschooler like unsafe encounters.
Excerpt four:
Excerpt four would be known as an "persuasive writing." This writing is trying to convince the reader about how the death penalty is a good punishment for criminals because the bible says an eye for an eye and how we should keep it on the books.
Excerpt five:
The final excerpt will be known as an "argumentative writing." This writing is again assertive, and it lists both sides of the spectrum how parents won't let their children study abroad because of how expensive it costs for things like tuition, food, shelter along with other necessities. It even goes as far as stating it's own position by saying how it's expensive to study abroad.
Hope this helps.
The rear wheel of a 150 kg tricycle accidentally ran over a nail. The circular tip of the nail has a diameter of 0.001 m. How much pressure did the wheel of the tricycle experience assuming that the entire weight of the tricycle is concentrated on the rear wheel that ran over the nail.
The pressure experienced by the wheel of the tricycle is 1.85×10¹⁰ N/m²
Pressure can be defined as the force acting perpendicular per unit area on the surface of a body. The S.I unit of pressure is N/m²
To calculate the pressure of the wheel of the tricycle, we use the formula below
Formula:
P = 4mg/πd².............. Equation 1Where:
P = Pressure of the tricycle wheelm = mass of the wheeld = diameter of the wheelg = acceleration due to gravityπ = pie.From the question,
Given:
m = 150 kgd = 0.001 mg = 9.8 m/s²π = 3.14Substitute these values into equation 1
P = 4(150)(9.8)/(0.001²×3.14)P = 5880/0.00000314P = 1.85×10¹⁰ N/m²Hence, The pressure experienced by the wheel of the tricycle is 1.85×10¹⁰ N/m².
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The philosopher Robert Nozick imagined an “experience machine” to show that a core feature of utilitarianism (as conceived by Bentham and Mill) does not conform with most people’s intuitions about “the good life.” Which of these core features of utilitarianism was Nozick’s main target?
Robert Nozick opines that individuals own themselves and hence have a right to own property.
What is utilitarianism?The term utilitarianism refers to the philosophical ideology that in the use of commodities, the best options is that which maximizes utility or satisfaction derived from the commodity.
In the position of Robert Nozick, utilitarianism means that individuals own themselves and hence have a right to own property.
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Siobhan wants to measure the mass of a bag of flour. What should she use?
This depends on how big the bag is. Most commonly, the bag weighs 2 kg to 10 kg or more. With this range of weight, Siobhan should use a balance to measure the mass of the flour and record the mass in kilograms. Thus, the answer is the first choice
Answer:
A weighing scale
Explanation:
A weighing scale graduated in grams or kilograms can be used.
With what minimum speed must athlete leave the ground in order to lift his center of mass 2.00 m and cross the bar with a speed of 0.95 m/s
The athlete must leave the ground with a speed of 6.33m/s.
Kinect and potential energyTo calculate the initial speed, with the information of height and final speed, we can use the following expression that uses the kinetic energy and potential energy:
[tex]mgh_1 + \frac{1}{2}mv_1^{2}= mgh_2 + \frac{1}{2}mv_2^{2}[/tex]
Applying the values given by the statement we have:
[tex]9.81\times 0 + \frac{1}{2}v_1^{2} = 9.81 \times 2 + \frac{1}{2}(0.95)^{2}[/tex]
[tex]v_1 = 6.33m/s[/tex]
So, the athlete must leave the ground with a speed of 6.33m/s.
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Suppose that Salim hits a 100 g fastball moving towards him at a speed of 42 m/s with his bat as shown in the image.the impulse of the fastball is 8 kg.m/s in the antiparallel direction of the initial velocity. Then the final momentum of the fastball is --------------( Suppose that the direction of the fastball toward the bat is negative and away from the bat is positive)
1.8 kg m/s
0.6 kg m/s
3.8 kg m/s
2.4 kg m/s
The final momentum of the ball is 3.8 kgm/s.
Change in momentum of the ballThe impulse received by the ball is equal to change in momentum of the ball.
J = ΔP
where;
J is the impulseΔP is change in momentumΔP = P₂ - P₁
P₂ = ΔP + P₁
Final momentum of the ballThe final momentum of the ball is calculated as follows;
P₂ = 8 + (- 0.1 x 42)
P₂ = 8 - 4.2
P₂ = 3.8 kgm/s
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A sphere of mass M 5 1.00 kg is supported by a string that passes over a pulley at the end of a horizontal rod of length L 5 0.300 m (Fig. P17.15). The string makes an angle u 5 35.08 with the rod. The fundamental frequency of standing waves in the portion of the string above the rod is f 5 60.0 Hz. Find the mass of the portion of the string above the rod.
A fundamental frequency of 60 Hz, attached mass of 1 kg., rod length of
0.3 m gives the mass of the part of the string as 3.245 × 10⁻³ kg.
Response:
The mass of the string, m ≈ 3.245 × 10⁻³ kgHow can the mass of the part of the string be calculated?The given parameters are;
Mass of the sphere, M = 1.00 kg
Length of the rod, L = 0.300 m
Angle the string makes with the rod, θ = 35°
The fundamental frequency of the standing wave in the portion of the
string above the rod, f₁ = 60.0 Hz
Required;
The mass of the portion of the string above the rod
Solution:
The fundamental frequency in a string is given as follows;
[tex]f_1 = \mathbf{\dfrac{\sqrt{\dfrac{T}{m/l} } }{2 \cdot l}}[/tex]Where;
T = The tension in the string
m = The mass of the string
l = The length of the string
[tex]The \ tension \ in \ the \ string, \ T= \mathbf{\dfrac{M \cdot g}{sin(\theta)}}[/tex]Which gives;
[tex]T= \mathbf{\dfrac{1 \times 9.81}{sin(35)}} \approx 17.1[/tex]
The tension in the string, T ≈ 17.1 N
[tex]The \ length \ of \ the \ string, \ l=\mathbf{\dfrac{L}{cos(\theta)}}[/tex]
Therefore;
[tex]l=\dfrac{0.300}{cos \left(35^{\circ} \right)} \approx 0.366[/tex]
Therefore;
[tex]60.0 = \mathbf{\dfrac{\sqrt{\dfrac{17.1}{m/0.366} } }{2 \times 0.366}}[/tex]
Which gives;
[tex]m = \dfrac{17.1}{(60.0 \times 2 \times 0.366)^2} \times 0.366 \approx 3.245 \times 10^{-3}[/tex]
The mass of the string, m ≈ 3.245 × 10⁻³ kgLearn more about the fundamental frequency of an material here:
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Select the correct answer.
While Jordan was playing with her favorite doll, one of its legs fell off. Now she wants to take the doll to visit the doctor. What does Jordan's
thought process demonstrate?
O A. logic
OB. animism
O C. classification
OD. conservation
What problem did the crew of Biosphere 2 face?
A virus from one of the animals
A loss of oxygen
One of the crew members developed cancer
The crew ran out of food.
Enumerate some things you can do to make work easier and faster when working with simple machines. (2 answer)
Answer:
by increasing the distance through which force is applied, by multiplying force of speed to the energy applied
The first user who answer is correct :)
You're collecting data in BeyondLabz for an object in free fall, subject to air resistance. How do you know when you've collected enough data points for a single run
Enough data points would have been collected when specific data for upward and downward motion are collected.
What is a Data point?A data point is a discrete unit of information. This information is always unique.
Free fallAn object subjected to free fall is under the influence of gravity. An object subjected has different time of motion for upward and downward motion.
Thus, we can conclude that enough data points would have been collected when specific data for upward and downward motion are collected.
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if two temperatures differ by 25 degrees on Celsius scale, the difference of temperature on Fahrenheit scale is?
Answer:
25 x 9/5 = 45 degrees Fahrenheit
Explanation:
What is the magnitude of the electric field at a point that is 0.5m to the right of a small sphere with a net charge of -6.0x10-6 C?
Answer:
lil durk a goat
Explanation:
How much work is needed to lift a 50kg weight 3.0m ?
Suppose that you want to build a transformer that will convert 70 V power coming in the primary coil to 245 V power going out of the secondary coil. What is the smallest total number of turns (primary turns plus secondary turns) you need to create the transformer
Answer: 9 Turns
Explanation: primary turns + secondary turns.
The smallest total number of turns (primary turns plus secondary turns) you will need to build the transformer is 9 turns
Data obtained from the question Primary voltage (Vₚ) = 70 VSecondary voltage (Vₛ) = 245 VTotal turns =? How to determine the primary and secondary turns Primary voltage (Vₚ) = 70 VSecondary voltage (Vₛ) = 245 VPrimary turns (Nₚ) =? Secondary turns (Nₛ) =?Nₛ / Nₚ = Vₛ / Vₚ
Nₛ / Nₚ = 245 / 70
Nₛ / Nₚ = 7 / 2
Thus,
Primary turns (Nₚ) = 2 turns Secondary turns (Nₛ) = 7 turnsHow to determine the total turns Primary turns (Nₚ) = 2 turns Secondary turns (Nₛ) = 7 turnsTotal turns =?Total turns = Nₚ + Nₛ
Total turns = 2 + 7
Total turns = 9 turns
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Perform an experiment in which you flip a switch 2,300,000 times. Write this
number in scientific notation.
O A. 23 x 10-6
O B. 2.3 x 106
O C. 0.23 x 105
O D. 0.23 x 106
Answer:
B. 2.3 x 10⁶
Explanation:
To calculate scientific notation for the number 2,300,000, we have to follow this notation
a × 10^bStep 1 :
To find a we have to write the non-zero digits placing a decimal after the first non-zero digit.
2,300,000 to 2.300000Step 2 :
Now, to find b count how many numbers of digits are there to the right of the decimal.
2.300000Hence, there are 6 digits to the right of the decimal.
Step 3 :
Since, we had found the value of a and b, we can now reconstruct the number into scientific notation.
a = 2.3
b = 6
2.3 × 10⁶Therefore, option b is correct.
A bridge that was 5m long has been washed out by a heavy rain. The road on the
far side of the stream is 2m lower that the road the car starts on. How fast must
the car be going to successfully jump the stream?
A battery is charging. Electric current enters the battery through the ______ terminal, at a ______ potential than when it exits the battery
Electric current enters the battery through the negative terminal, at a high potential than when it exits the battery.
What is Potential difference?This is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field.
In a battery, electric current moves from negative to the positive terminal with the positive terminal having a higher potential which is the point where it leaves the battery.
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i know it’s 30 but how ??? what equations did you use and how do you get there ?
The change in momentum of the object between 0 and 4s is 40 Ns.
What is momentum?The momentum of an object is determined from the product of mass and velocity of the object.
The change in momentum of an object is equal to the impulse received by the object.
ΔP = J = Ft
where;
ΔP is change in momentumJ is impulseF is forcet is timeThe change in momentum of the object between 0 and 4s is calculated as follows;
ΔP = Ft
ΔP = 10 x 4
ΔP = 40 Ns
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A 4-lb collar can slide without friction along a horizontal rod and is in equilibrium at A when it is pushed 1 in. to the right and released from rest. The springs are undeformed when the collar is at A and the constant of each spring is 2800 lb/in. Determine the maximum velocity of the collar.
The maximum velocity of the collar is 0.335 m/s.
Maximum velocity of simple harmonic motion
The maximum velocity of a simple harmonic motion occurs when the object is in equilibrium position.
K.E = U
¹/₂mv² = ¹/₂kx²
mv² = kx²
where;
k is spring constant = 2800 lb/in = 316.36 N/mx is extension = 1 in = 0.0254 mm is mass = 4 lb = 1.81 kg[tex]v = \sqrt{\frac{kx^2}{m} } \\\\v = \sqrt{\frac{316.36 \times 0.0254^2}{1.81} }\\\\v = 0.335 \ m/s[/tex]
Thus, the maximum velocity of the collar is 0.335 m/s.
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A half-ring (semicircle) of uniformly distributed charge Q has radius R. What is the electric potential at its center
The electric potential at the center of the half-ring is [tex]\frac{kQ}{R}[/tex].
Electric force experienced by the chargeThe force experienced by the charge is calculated by Coulomb's law;
[tex]F = \frac{kQ^2}{R^2}[/tex]
Electric field strengthThe electric field strength is force per unit charge;
[tex]E = \frac{F}{Q} = \frac{kQ}{R^2}[/tex]
What is electric potential?The electric potential is work done in moving a charge from infinity to a certain point.
V = Ed
[tex]V = \frac{kQ}{R^2} \times R\\\\V = \frac{kQ}{R}[/tex]
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A rotating turntable (rt=4.50 m) is rotating at a constant rate. At the edge of the turntable is a mass (m = 3.00 kg) on the end of a 5.00 m - long string (L). If theta = 40.0o,determine:
The magnitude of the tension in the string is 9.31 N.
Tension in the stringThe magnitude of the tension in the string in the horizontal circle formed by the turn table is calculated as follows;
T = Fcos(θ)
where;
F is centripetal forceθ is inclination of the string[tex]T = \frac{mv^2}{r} \times cos(\theta)\\\\T = \frac{3 \times 4.5^2}{5} \times cos(40)\\\\T = 9.31 \ N[/tex]
Thus, the magnitude of the tension in the string is 9.31 N.
The complete question is below:
A rotating turntable (rt=4.50 m) is rotating at a constant rate. At the edge of the turntable is a mass (m = 3.00 kg) on the end of a 5.00 m - long string (L). If theta = 40.0o,determine the magnitude of the tension in the string.
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5) Two cables support a mass of 100kg. One cable is perfectly horizontal, while the other
makes an angle of 40 degrees above the horizontal. Find the tension in the horizontal
cable.
T sin θ = M g = W cable supporting weight
T = 100 * 9.8 / sin 40 = 1525 N
T cos θ = Th horizontal force due to cable
Th = 1525 cos 40 = 1168 N
Gravity is a force that opposes motion. true or false?
Answer:
true,because when the gravity of an object is changed the motion of the object changes
If the frequency increased, how would the change impact the wave speed and wavelength?
Answer:
The frequency and wavelength of a wave are related. When frequency increases more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases.
Explanation:
Answer: The waves travel at the same speed, but the observed frequency depends on any relative motion between the observer and source. When the observed frequency changes, so does the wavelength. If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases.
Explanation: I hope this helped you understand
A rectangular box has side 10cm x 5cm x 2cm. If it lies on a horizontal surface and has weight 1.00N, calculate the maximum and Minimum pressure it exerts on the Surface
Answer:
P max = 1000 pa
P min = 200 pa
Explanation:
P = F/A
pressure will be maximum when surface gets minimum. so to find the maximum amount of pressure we need to calculate the minimum surface. it is 2cm×5cm = 10cm² = 0.001m² . then we have:
P = 1 / 0.001 = 1000 pa
to find minimum pressure the surface that must be chosen is 10cm×5cm = 50cm² = 0.005m² .
P = 1 / 0.005 = 200 pa
Brainliest if correct
Answer:
It's is c coz the weight is equal to the normal force
Two students side in carts opposite to one another in a spinning Ferris wheel as shown.
Student A is originally at the bottom of the Ferris wheel while student B is at the top of the Ferris wheel. As the wheel turns, student B comes to the bottom white student A arrives at the top, as shown. The Ferris wheel spins at a constant speed so the two students are traveling with constant speed. Students A and B have masses ma and mb, respectively. The Ferris wheel has a radius R. What is the magnitude of the TOTAL work done on student A in moving from the bottom to the top of the Ferris wheel? The total work is the sum of the work done by all the forces on the body; i.e. Wtotal = sum(Fd). Neglect air resistance.
Also, what is the sign of the work done on student B by the Ferris wheel in moving from the top to the bottom?
Net work done on student B by the Ferris wheel in moving from the top to the bottom is mathematically given as
net work done on A =0.
Net work doneGenerally the equation for the work energy theorem is mathematically given as
net work done on A = change in kinetic energy of A.
Where, angular velocity is constant.
change in kinetic energy = 0.
Hence, from work energy theorem,
net work done on A =0.
For more information on work
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How does the nature of heat explain the occurrence of high temperature in a human body that has a fever?
Answer:
People get a fever when their brain sets the body temperature higher than normal. This may happen as a reaction to germs such as viruses or bacteria, but it can also happen as a reaction to substances that are made by the body, such as prostaglandins. Our body produces prostaglandins to fight off germs
Explanation:
What would a wave with a low amplitude sound like?
A It would sound quiet.
B It would sound loud.
C It would sound squeaky.
D It would sound deep.
Answer: Your answer is A. it would sound quiet.
Hope this helps!
Answer:
I think a but not sure
Explanation:
The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound.
