Answer:
it is the same substance because it didn't change the process of that it was it just changed its state for would to liquid
Given 1 inch ≡ 2.54 cm and 1 foot ≡
12 inches, how many square centimeters are
in 3.22 ft2
?
Answer:
2991.47 [cm^2]
Explanation:
To solve this problem we must perform a dimensional analysis and use the corresponding conversion values:
[tex]3.22[ft^{2}]*\frac{12^{2}in^{2} }{1^{2}ft^{2}} *\frac{2.54^{2}cm^{2} }{1^{2}in^{2} } \\2991.47[cm^{2}][/tex]
A 2000 kg car moves along a horizontal road at speed vo
15.9 m/s. The road is
wet, so the static friction coefficient between
the tires and the road is only pls 0.105 and
the kinetic friction coefficient is even lower,
= 0.0735.
The acceleration of gravity is 9.8 m/s2.
What is the shortest possible stopping dis-
tance for the car under such conditions? Use
g= 9.8 m/s² and neglect the reaction time of
the driver.
Answer in units of m.
Answer:
The shortest possible stopping distance of the car is 175.319 meters.
Explanation:
In this case we see that driver use the brakes to stop the car by means of kinetic friction force. Deceleration of the car is directly proportional to kinetic friction coefficient and can be determined by Second Newton's Law:
[tex]\Sigma F_{x} = -\mu_{k}\cdot N = m \cdot a[/tex] (Eq. 1)
[tex]\Sigma F_{y} = N-m\cdot g = 0[/tex] (Eq. 2)
After quick handling, we get that deceleration experimented by the car is equal to:
[tex]a = -\mu_{k}\cdot g[/tex] (Eq. 3)
Where:
[tex]a[/tex] - Deceleration of the car, measured in meters per square second.
[tex]\mu_{k}[/tex] - Kinetic coefficient of friction, dimensionless.
[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.
If we know that [tex]\mu_{k} = 0.0735[/tex] and [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], then deceleration of the car is:
[tex]a = -(0.0735)\cdot (9.807\,\frac{m}{s^{2}} )[/tex]
[tex]a = -0.721\,\frac{m}{s^{2}}[/tex]
The stopping distance of the car ([tex]\Delta s[/tex]), measured in meters, is determined from the following kinematic expression:
[tex]\Delta s = \frac{v^{2}-v_{o}^{2}}{2\cdot a}[/tex] (Eq. 4)
Where:
[tex]v_{o}[/tex] - Initial speed of the car, measured in meters per second.
[tex]v[/tex] - Final speed of the car, measured in meters per second.
If we know that [tex]v_{o} = 15.9\,\frac{m}{s}[/tex], [tex]v = 0\,\frac{m}{s}[/tex] and [tex]a = -0.721\,\frac{m}{s^{2}}[/tex], stopping distance of the car is:
[tex]\Delta s = \frac{\left(0\,\frac{m}{s} \right)^{2}-\left(15.9\,\frac{m}{s} \right)^{2}}{2\cdot \left(-0.721\,\frac{m}{s^{2}} \right)}[/tex]
[tex]\Delta s = 175.319\,m[/tex]
The shortest possible stopping distance of the car is 175.319 meters.
Tim Kylie is one of the world's top chefs. He is best known for his signature dish, triple-dipped chip steak. This masterpiece contains over a pound of beef braised in duck fat. Another of Chef Kylie's more celebrated dishes is the Hamslaughter Supreme. This dish features ham stuffed sausage links presented in a basket made of braided bacon. While carnivores around the world roar for Chef Kylie's creations, it is unlikely that Chef Kylie will dine with them. As a longtime vegan, Chef Kylie would never dream of devouring one of his own dishes. What type of irony? explain your answer
Answer:
situational irony
Explanation:
Based on the scenario being described, this seems to be an example of situational irony. That is because the irony in this scenario is that Tim's most popular and world-renown cooking creations are made of meat but Tim is a vegan and does not consume meat, which all revolves around the situation that Tim is in. Since he can't enjoy the meals with his fans because he does not eat the ingredients in his own creation. Therefore, being specific to the situation that Tim has created.
The force of gravity depends on the mass of objects and the distance between them. TRUE OR FALSE?
The force of gravity depends on the mass of objects and the distance between them. This is true statement.
What is force?Physics defines force as the push or pull that modifies the velocity of a massed object.
The ability to change a body's resting or moving condition is referred to as an external force. There is a magnitude and a direction to it.
You may determine the Force using a spring balance. The SI's measure of force is the Newton.
The force of gravity between two objects is directly proportional to the mass of the object and inversely proportional to the square of the distance between them.
Hence, the force of gravity depends on the mass of objects and the distance between them. This is true statement.
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After she’s finished cooking Emily measures the mass of the dough balls. According to the law of conservation of mass, the mass of the dough bars should be equal to
Answer:
The weight of the dough bars after being cooked.
how many apples are in 29 trees if each tree has 45 apples?
Answer:
1305 I think but not sure
A ball of mass 200 g rolls along the ground at a speed of 5.2 m/s. Calculate the kinetic energy of the ball.
Answer:
We have a mass of 200g (0.2kg) moving at 20m/s
Kinetic Energy KE = ½ mv^2 where m is mass and v is velocity
Actually, v is a vector quantity, so KE = ½ mv•v
The dot product of 2 vectors a and b is abCosθ where θ is the angle between the vectors.
Obviously v•v = v^2 Cos0 = v^2
In this case, we have KE = ½ (0.2)(20^2) = 40kg-m^2/s^2 = 40J
So we have kinetic energy in the amount of 40 Joules.
Explanation:
The right answer is "2.7 J"
Answer explanation:
Remember to convert grams to kilograms first by dividing by 1000.
Kinetic energy
= 1/2 × mass × speed2
= 1/2 × 0.2 kg × (5.2 m/s)^2
= 2.7 J (to 2 sig. fig.)
Hope it helps ✨✨
a student pushes a book with a force of 5 N to the east.which statement
describes the reaction force?
Answer:
5N westward, acting on the student
Explanation:
Answer: 5N westward, acting on the student
Explanation:
When the air resistance can be ignored the velocity of an object dropped initially from rest is given by following equation where g is free fall acceleration
g*t^2/2
g*t
g*t/2
g
Answer:
v = gt
Explanation:
From the question given, we obtained the following information:
Initial velocity (u) = 0 m/s
Acceleration due to gravity (g) = g
Time (t) = t
Final velocity (v) =.?
Thus, we can obtain the velocity as illustrated below:
v = u + gt
v = 0 + gt
v = gt
Thus, the equation for the velocity is
v = gt
A book with a mass of 1kg is dropped from a height of 3m . What is the potential energy of th book when it reaches the floor?
Answer:
30 J
Explanation:
height = 3 m
mass = 1kg
acceleration due to gravity = 10m/s²
Potential Energy = mass× gravity × height
= 1kg ×10m/s²× 3m
= 30 J
The frequency of a F-sharp sound wave in music is 370 Hz, and its wavelength is 0.93 m. what is the wave speed?
Answer:
wave speed =344.1 m/s
using v=fΠ
where v is the speed
The wave speed will be 344.1 m/sec. The wave speed is found as the product of the wavelength and the frequency of the wave.
What is wavelength?The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The given data in the problem is;
v is the speed = ?
f is the frequency= 370 Hz
λ is the wavelength of the wave=0.96 m
The relationship between the wave's wavelength, frequency, and speed is given as;
wavelength = speed of wave / frequency
[tex]\rm \lambda = \frac{v}{f} \\\\ v = \lambda \times f \\\\ v = 0.93 \times 370 \ Hz \\\\ v= 344.1 \ m/sec[/tex]
Hence, the wave speed will be 344.1 m/sec.
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Using only one management style with all people is the most effective leadership technique for any organization.
Answer:
False
Explanation:
More than one management style with all people is the most effective leadership technique for any organization. So, the given statement is False.
What is Leadership technique?Leadership styles are defined as those adopted by company leaders to increase efficiency, satisfaction, growth and advancement in all positions in the organization. It requires a different style in different situations and each leader needs to know when to show a special behavior.
These strategies define every leader's personal leadership style. Some effective leadership Techniques are as follows:
Understanding the objectives clearlyGet to know the teamAlways be a learnerListen.Learn to delegate.Thus, more than one management style with all people is the most effective leadership technique for any organization. So, the given statement is False.
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What is a good question for a Science Fair (7th grade advanced) also im an online student so nothing really physical something that can really explain thru pictures. I just want suggestions thank you.
Diego hypothesizes that the Earth wobbles on its axis in a pattern that is repeated every 20,000 years.
Which of the following ways would be the best way to test Diego's hypothesis?
A.
conduct a controlled experiment
B.
make observations in nature
C.
observe the movement of other planets
D.
make a model
Answer:
its d
Explanation:
i did itand it was d
Goal: Use dimensional analysis to solve conversion problems. 1. Observe: In the question, you are asked to convert kilometers to centimeters. To do this, first you will convert kilometers to meters. Drag the 1000 meters/1 kilometer tile down. A. What do you notice? __________________________________________________ B. Because kilometers appear in the numerator of one term and in the denominator of another, they cancel, or disappear. The process of converting units by canceling is called dimensional analysis. How many meters are in 0.828 kilometers? ________________________________ C. A meter is a much shorter unit of measurement than a kilometer. Based on this fact, does your answer to B make sense? ______________________________________
Answer:
A. The kilometers unit is cancelled out and the result shown is 828 meters.
B. 828 meters are found in 0.828 Kilometers
C. Yes
Explanation:
A. When the 1000 meters/1 kilometer tile is dragged down, the kilometers unit is cancelled out and the value 828 meters appears.
This is because the kilometers appear in the numerator of one term and in the denominator of another, they cancel, or disappear. The process of converting units by canceling is called dimensional analysis.
B. 0.828 Kilometers * 1000 meters/1 kilometer = 828 meters
Therefore, there are 828 meters in 0.828 kilometers.
C. A meter is a much shorter unit of measurement than a kilometer. Based on this fact, it does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
(A) The process of converting units by canceling is called dimensional analysis.
(B) There are 828 meters in 0.828 kilometers.
(C) It does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
The given problem is based on some basic fundamentals and applications of dimensional analysis. So as per the given problem, each subpart says,
A.
When the 1000 meters/1 kilometer tile is dragged down, the kilometers unit is cancelled out and the value 828 meters appears.
This is because the kilometers appear in the numerator of one term and in the denominator of another, they cancel, or disappear. The process of converting units by canceling is called dimensional analysis.
Thus, we can conclude that the process of converting units by canceling is called dimensional analysis.
B.
Converting the given value of kilometers into the meters as,
0.828 Kilometers * 1000 meters/1 kilometer = 828 meters
Thus, we can conclude that there are 828 meters in 0.828 kilometers.
C.
A meter is a much shorter unit of measurement than a kilometer. Based on this fact, it does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
Thus, we can conclude that it does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
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If a ball is rolled down a frictionless inclined plane from a height of 3 feet, to what height would it roll up to on the other side?
Answer:
It will roll up to its initial height from which it rolled from on the first hill
Explanation:
The given information are;
The height from which the ball is rolled = 3 feet[
The equation of the potential energy of the ball as it rolled down the frictionless inclined plane is given by the following equation;
m × g × h₁ = 1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r]
Where;
m = The mass of the ball
h = The from which the ball is rolled down
v = The velocity of the ball
r = The radius of the ball
Therefore, all the potential energy, m × g × h, is converted into kinetic energy when the ball reached the ground
Similarly, as the ball rolls up on the other side, by the principle of energy conservation, all the kinetic energy is transformed into potential energy as follows
1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r] = m × g × h₂, therefore, we have;
1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r] = m × g × h₁ = m × g × h₂
Therefore since m × g × h₁ = m × g × h₂, then h₁ = h₂, the ball rises to the same height it started rolling from on the first hill.
does anyone know how to do this
I need help with this physics question
If a car travels 40 mph for a distance of 1680 miles, how much time did it take?
Answer:
42 hour
Explanation:
It is given that,
Speed of a car, v = 40 mph
Distance covered by the car, d = 1680 miles
We need to find the time taken by the car to cover this distance. We can find it using the formula of speed which is equal to the distance covered divided by the time taken. Let the time is t.
speed = distance/time taken
[tex]t=\dfrac{d}{s}\\\\t=\dfrac{1680\ \text{miles}}{40\ \text{mph}}\\\\t=42\ \text{hour}[/tex]
Hence, the car will take 42 hours to cover 1680 miles with a speed of 40 mph.
If a hypothesis is.......
additional tests should be done to ensure accurate results.
a. correct
b.incorrect
c. unknown
d. inconclusive
Answer:
a correct
Explanation:
a hypothesis is a supposition made of a basis of limited evidence
What is a scientific theory?
Answer:
Scientific theories are explanations of some aspect of the natural world based on repeated observations.
Hope this helps!!!!
Answer:
The way that scientists use the word 'theory' is a little different than how it is commonly used in the lay public," said Jaime Tanner, a professor of biology at Marlboro College. "Most people use the word 'theory' to mean an idea or hunch that someone has, but in science the word 'theory' refers to the way that we interpret facts.
Explanation:
What happens to the change in the value of the speed as you increased the amount of force applied on your
chosen Item
If you increased the amount of force applied on your chosen Item, rate of increase of its velocity with time will increase.
What is force?An object's push or pull is seen as exerting a force. The interaction of the objects produces push and pull. You can also use words like stretch and squeeze to describe force.
The definition of force in physics is: the push or pull on a mass-containing item changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
So, if you increased the amount of force applied on your chosen Item, its acceleration will be increased and rate of increase of velocity with time will increase.
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The air inside a room is at a temperature of 35°C and has a mixing ratio of 7.6 g/kg. a) What is the relative humidity? % b) What is the dew point? °C c) If the room temperature decreases by 5°C per hour, how many hours will it take for the air to reach saturation? hours d) After reaching saturation, if the temperature of the room continues to decrease for one more hour, approximately how many grams of water vapor (per kg of air) will ahve had to condense out of the air to maintain a relative humidity of 100%? g/kg
Answer:
(a). The relative humidity is 20.57%
(b). The dew point is 79.114°F
(c). It take for the air to reach saturation is 17 hours.
(d). The water is 7.6g/kg.
Explanation:
Given that,
Temperature = 35°
Mixing ratio = 7.6 g/kg
(a). We need to calculate the relative humidity
Using formula of relative humidity
[tex]relative humidity=\dfrac{mixing\ ratio}{36}\times100[/tex]
[tex]relative humidity=\dfrac{7.6}{36.94}\times100[/tex]
[tex]relative humidity=20.57\%[/tex]
(b). We need to calculate the dew point
Using formula of dew point
[tex]dew\ point=T^{\circ}F-\dfrac{(100-relative\ humidity)}{5}[/tex]
Put the value into the formula
[tex]dew\ point=95-\dfrac{100-20.57}{5}[/tex]
[tex]dew\ point=79.114^{\circ}F[/tex]
(c). If the room temperature decreases by 5°C per hour
We need to calculate the time
Using formula of time
[tex]t=\dfrac{T_{a}-increase\ temperature}{5}[/tex]
Put the value into the formula
[tex]t=\dfrac{95-10}{5}[/tex]
[tex]t=17\ hours[/tex]
(d). If the temperature of the room continues to decrease for one more hour,
We need to calculate the how many grams of water vapor
Using given data
The water of 7.6g/kg vapour will have to condense out of air for the maintain relative humidity at 100%
Hence, (a). The relative humidity is 20.57%
(b). The dew point is 79.114°F
(c). It take for the air to reach saturation is 17 hours.
(d). The water is 7.6g/kg.
Answer:
temp: 35° c (95°f)
MR:7.6
SMR: 36.5
RH: 21% (20.82)
Dew Point: 10° C
5°c per hour: 5 hours for the 35°c air temp to reach the 10°c dew point
1 more hour: Temperature will decrease to 5°c, half the water molecules dewpoint "size" I view it as, and 3.8g/kg of water vapour has condensed out
so
1. 21%
2. 10° C
3. 5 hours
4. 3.8g/kg
The bowler threw the 9kg bowling ball with a force
of 90N. What was the bowling ball's acceleration?
Answer:
10 m/s²
Explanation:
9kg= mass 90N=force acceleration=?
the equation is;
Acceleration (m/s²)= force(N) ÷ mass(kg)
Which type of intelligence (analytic, creative, practical, verbal, mathematical, spatial, bodily-kinesthetic, musical, interpersonal, interpersonal, naturalist, or existentialist) does this individual has.
Professor Wooddro teaches an Introduction to Philosophy at the college. He loves to talk with students about the meaning of life and death and enjoys struggling with life's most challenging questions.
Answer:
verbal, IntrapersonalExplanation:
Remember, we are told that "Professor Wooddro teaches an Introduction to Philosophy at the college, and loves to talk about the meaning of life and death" which would require having verbal intelligence (the ability to understand and relate information using words).
Intrapersonal intelligence is also reflected by Professor Wooddro as we are told he "enjoys struggling with life's most challenging questions", which shows his knowledge of his own strengths or weaknesses.
The mining-resource cycle determines the use of ore materials. Which step is not part of the cycle?
A)
exploring and extracting ores
B)
refining ores and creating products from ore materials
C)
marketing and selling products that use ore materials
D)
recycling and disposing of wastes from the steps and the products
Answer:
c) marketing and selling products that use ore materials
a meteor Falls towards Earth's surface given that the acceleration due to gravity is 9.8 m/s^2 what is the meteors potential energy if it has a mass of 20kg at an altitude of 500
Answer: It’s 98,000
Explanation: Just did it on apex
PLEASEEE HELPPPPPPP:
A current of 15 Amps flows through a circuit with a resistance of 0.10 Ohms. What is the voltage?
A current of 15 amperes is flowing with a resistance of 0.10 ohms, then the voltage will be equal to 1.5 volts.
What is Electrical energy?When put in an electromagnetic field, charged matter experiences a force due to the fundamental property of electric charge. Positive or negative electrical ions are possible.
When two charges are in opposition to one another, they repel one another. The term "neutral" refers to an object that has no net charge. The early understanding of the way charged particles interact is now referred to as classical electrodynamics, and it is still true for issues that do not demand taking into account quant phenomena.
Electrical charge is a preserved attribute, meaning that the net charge of an isolated system—that is, the sum of the positive and negative charges—cannot change. Particles at the subatomic level carry an electric charge.
As per the data given in the question,
Current, I = 15 A
Resistance, R = 0.10 ohms
Then, the voltage (V) will be,
V = RI
V = 15 × 0.10
V = 1.5 volts.
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What does Newton's third law describe?
A. Equal and opposite forces
B. How the amount of mass influences the amount of force needed
to move an object
C. The tendency of moving objects to stay in motion
D. The attractive force between two objects due to their masses
HELP ME PLEASE. i need to turn this in by tomorrow, also pls use the words above^ thank you i’ll mark u the brainliest.
Answer:
the corrdct answer is core