Lets say that:
Eric is E
Sheena is S
Yael is Y
We know that S+2=Y, E= 1/S and that E+S+Y=52. So, we can insert S+2=Y and E= 1/S into our other equation, which would bring us to (1/2S)+(S+2)+S=52. This is equal to 1/2S+S+2+S=52. We then use algebra to get the answer:
Given:
S+2=Y
E=1/S
E+Y+S=52
Equation:
1/2S+S+2+S=52
1/2S+S+S=52
2.5S=50
S=50/2.5
S=20
And since Yael has 2 more points then Yael then we do 20+2 and get 22.
Hope this helps! <3
At 16, Juana is at an appropriate weight and likes to eat whatever she wants to. What's the best strategy to ensure Juana's health? A. start paying attention to her diet so she won't gain weight later and walk once a day B. get in the habit of eating food high in nutrients and engage in regular physical activity C. reduce her calorie intake to 1,800 per day and take up an aerobic sport like soccer
B
Let me know if I'm correct
I'm pretty sure it's B
Name and briefly describe the two types of interference
The two types of wave interference are constructive and destructive.
These both describe what happens when waves combine
Constructive interference is when 2 waves combine to form a wave with a larger amplitude, but this is only if both waves are both positive or both negative.
Destructive interference is when the two waves are opposite, one is negative, one is positive. They subtract forming the combined wave that has a lower amplitude.
I hope that helps u out!! :)
Liquid water first appears after _______ minutes? A) 1 B) 3 C) 16.5 D) 19
Answer B) 3
Explanation:
A stunt car with a mass of 1000 kg crashes into a tree on a movie set during the collision acceleration of the car with 3 m what was the force of impact of the collision on the car
F=m•a=1000•3=3000 N=3kN
The force of impact during the collision of a stunt car with a tree, given a mass of 1000 kg and an acceleration of 3 m/s^2, is 3000 Newtons (N), calculated using Newton's second law of motion.
Explanation:To find the force of impact of the collision on a stunt car that crashes into a tree, we can use Newton's second law of motion, which states that the force acting on an object equals its mass times its acceleration (F = ma). In this case, the mass (m) of the car is given as 1000 kg, and the acceleration (a) during the collision is mistakenly referred to as '3 m', which seems like a typo for '3 m/s2'. Assuming the acceleration is indeed 3 m/s2, the calculation would be:
F = 1000 kg × 3 m/s2 = 3000 N.
Hence, the force of impact during the collision would be 3000 Newtons (N). This calculation essentially applies Newton's second law to determine the net force acting on the car due to its acceleration towards the obstacle (in this case, a tree), providing a fundamental understanding of the dynamics involved in car crashes.
A cart has a mass of 2.0 Kg and moves at a constant speed of 4.0 m/s. What is the kinetic energy?
Answer:
The kinetic energy is 16 Joules.
Explanation:
Use the formula for the kinetic energy:
[tex]E_k=\frac{1}{2}mv^2 = \frac{1}{2}2.0kg\cdot 4.0^2 \frac{m^2}{s^2}=16J[/tex]
Which of the following explains why tides occur every 12 hours and 25 minutes?
A. Variations in the land and depth of water make the tides uneven.
B. It takes 24 hours and 50 minutes for the earth to make a complete rotation.
C. Early scientists misunderstood how to calculate tides, and their error persists to this day
D. In some seasons, the rotation of the earth is slower than others, requiring additional time.
Answer : B
A lunar day is the time it takes a specific site on the earth to rotate from exact point under the moon to the same point. Unlike the solar day, a lunar day is 24 hours 50 minutes. the lunar day is 50 minutes longer than the solar day because the moon revolves around the earth in the same direction that the earth rotates around its axis. So it takes the earth an extra 50 minutes to catch up.In lunar day coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur every 12 hr 25 minutes apart.Final answer:
The reason why tides occur every 12 hours and 25 minutes is that the Earth takes 24 hours and 50 minutes to align again with the Moon due to the Moon's orbit, requiring Earth to rotate a bit more each day. Option B is the correct answer.
Explanation:
Tides occur due to the gravitational pull primarily of the Moon and, to a lesser extent, the Sun on Earth's oceans. High tides occur approximately every 12 hours and 25 minutes. This is because the Moon takes 24 hours and 50 minutes to rotate once around the Earth, meaning the Earth has to rotate a little bit more each day to align with the Moon again. Since tides occur twice a day, the extra time divided by two gives us the 12 hours and 25 minutes between successive high tides.
The correct answer to why tides occur every 12 hours and 25 minutes is that the Earth has to rotate an additional distance for a location to re-align with the Moon's position due to the Moon's orbit around Earth. Therefore, option B is correct: It takes 24 hours and 50 minutes for the Earth to make a complete rotation relative to the Moon.
1. Is this graph exponential growth or exponential decay? Explain why.
2. On what swing did the pendulum's maximum height dip below 1 in. for the first time?
1). This graph reveals exponential decay. As time goes on (moving left to right across the graph), the maximum excursion of the pendulum's swing becomes smaller and smaller. On a graph of exponential growth, it would get larger and larger as time goes on.
2). The first time the pendulum's maximum height dipped below 1 inch was on the 4th swing.
Answer:
4 swings
Explanation:
Dan bikes 10 km west and then bikes another 5 km west. What is dans velocity if it takes 45 minutes
Dan's velocity is calculated by dividing his total displacement of 15 km west by the total time of 45 minutes, which is equivalent to 0.75 hours, hence his velocity is 20 km/h west.
Explanation:The student asks about Dan's velocity after biking 10 km west and then another 5 km west in a total time of 45 minutes. To find the average velocity, we need to calculate the total displacement over the total time. Since Dan's travel direction is consistent (west), the total displacement is simply the sum of the two distances. So, his displacement is 10 km + 5 km = 15 km west. To get the velocity, we divide the displacement by the time in hours. First, we convert 45 minutes into hours by dividing by 60, which gives us 0.75 hours. Hence, Dan's velocity is 15 km / 0.75 h = 20 km/h west.
What determines the mass of an object
Answer:
Mass is a fundamental property of the object. The mass of an object is a measure of objects resistance to acceleration, sometime also called "Inertia".It is a numerical measure of its inertia. Mass measured by using balanceWhat standard of measurement do most countries use and discuss why such a standard is beneficial
I mean i guess its the metric system?
The metric system (International System of Units, SI) is the standard of measurement used by most countries and the scientific community because it simplifies calculations, ensures accurate data comparison, and supports global collaboration in science.
Explanation:The standard of measurement most countries and the scientific community use is the metric system, also known as the International System of Units (SI system). Unlike the United States, which uses the Imperial system, the metric system is universally accepted in scientific reports and research due to its simplicity and global standardization. This system is especially crucial in sciences, as it provides a 'standard language of measurement' that ensures scientists worldwide are on the same page when it comes to analyzing data and conducting experiments.
The metric system's base-ten structure simplifies calculations and conversions, making it more efficient and easier to understand than the Imperial system.Standardized measurements allow for accurate comparison of experimental data across different laboratories globally.Adapting a universal standard like the SI system supports the exchange of scientific information and collaboration among researchers from various countries.In contexts ranging from gas pumps to scientific labs, standardized measurement ensures consistency, reliability, and global understanding. Changes in the definitions of standard units of measurement reflect the dynamic nature of science and the evolving technological landscape, necessitating periodic updates to maintain accuracy and relevance in scientific discoveries.
The widespread adoption of the metric system enhances global communication in science, thus accelerating technological advancements and scientific progress. This unified approach to measurement not only facilitates international trade and commerce but also supports educational and research endeavors by providing a consistent framework for learning and discovery.
A 3kg object moving at 15 m/s what is the momentum
p=m•v=3•15=45 kg•m/s
Which of the following is a meander that has been cut off from a river?
A)Coastline
B)Gully
C)Oxbow lake
D)Stream
Answer:
oxbow lake
Mark as brainliest, please!?
Explanation:
at what temperature (in K) will 1.0 mol of gas occupy 1.0 m3 at a pressure of 1.0 * 10^4 pa
ideal gas equation ...pv=nrT ... n=2 ... r is gas constant T=10^4x1/8.3
a young man exerted a force of 900 newtons for 10 seconds to push his car that had ran out of gas. however he could not get the car to move. how much work did he do?
A-9000 joules
B-9000 watts
C-90 joules
D-90 watts
E-no work was done
Work done is defined as product of force and displacement of point of application of force.
So here we will have
[tex]W = F.d[/tex]
now since here after applying the force the car is not displaced from its position
So here we have
d = 0
so work done is given as
[tex]W = 900 \times 0 = 0[/tex]
so there is no work done in this case
iron is much denser than a feather. yet a particicular sample of fathers weighs more than a simple of iron. explain how this is possible
Final answer:
A steel needle or paper clip can float on the surface of water even though steel is denser than water. This is due to surface tension, which creates an upward force that counteracts the force of gravity.
Explanation:
Although steel is denser than water, a steel needle or paper clip placed carefully lengthwise on the surface of still water can be made to float. This is possible because of a phenomenon called surface tension. Surface tension is the force that acts on the surface of a liquid and tends to minimize its area.
When a small object like a steel needle or paper clip is placed on the surface of water, the surface tension of the water molecules pulls on the object from all sides, creating an upward force that counteracts the force of gravity. As a result, the object floats on the surface of the water.
This demonstrates that density alone does not determine whether an object will float or sink. Other factors, such as surface tension, can play a significant role in determining whether an object will float or sink.
One Newton is expressed in ?
Answer:
It is the SI unit of force.
Explanation:
The rate of change of momentum in the body is directly proportional to the force applied on the body. It is the second law of motion.
The mathematical form of Newton's second law is
F = m x a
where, m is the mass and a be the acceleration.
If a body of mass 1 kilogram having an acceleration of 1 m/s^2, it means the force applied on the body is 1 newton.
A collision in which kinetic energy is transferred only as kinetic energy from one object to another and is not converted in any other amount to any other form of energy
A static friction.
B kinetic energy
C elastic collision
D bouyant force
C. Elastic collision. A perfect elastic collision is on that doesn't result in any k.e loss during the collision.
Elastic collision is the correct answer C.
Is it possible for the gravitational force between two 50-kg objects to be less than the gravitational force between a 50 kg object and a 5 kg object? Explain.
The gravitational force between two objects depends on both their masses and the distance between them. It is possible for the gravitational force between two like masses to be less than that between unequal masses if the like masses are farther apart.
The question asks whether it's possible for the gravitational force between two 50-kg objects to be less than the gravitational force between a 50 kg object and a 5 kg object. The answer to this depends on the distance between the objects, because the gravitational force is directly proportional to the mass of the objects and inversely proportional to the square of the distance between them, according to Newton's Law of Universal Gravitation. So, if the distance between the two 50-kg objects is significantly larger than between the 50 kg and 5 kg objects, then the gravitational force between the 50-kg pair could indeed be less.
Newton's law of Universal Gravitation equation is:
F = G * (m1 * m2) / r²
Where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between the centers of the two masses.
Therefore, if the two 50-kg objects are far apart, the r value in the equation will be large, reducing the value of F, the gravitational force. Meanwhile, if the 50 kg and 5 kg objects are very close, the r value will be smaller, and the force F could be larger despite the smaller mass of one of the objects.
What is the wavelength of the wave above?
A- 0.75 cm
B- 1.5 cm
C- 2.5 cm
D- 3.5 cm
Answer ; 2.5 (C)
From the given figure it is cleat that the wave length (λ) = 2.5 cm
It is a "measure of distance between two identical crests or identical troughs in a wave.
In the figure, high points are crests and low points are troughs.
I SERIOUSLY can't do this type of questions so can someone solve it detailedly and putting with letters (there is a system you name conducting wires as A, B etc. I don't know what that system calls in physics)
Find the equivalent resistance with details
Answer:
4 Ohms
Explanation
(This is seriously not as hard as it looks :)
You only need two types of calculations:
replace two resistances, say, R1 and R2, connected in a series by a single one R. In this case the new R is a sum of the two: [tex]R = R_1+R_2[/tex]replace two resistances that are connected in parallel. In that case: [tex]\frac{1}{R}= \frac{1}{R_1}+\frac{1}{R_2}\\\mbox{or}\\R= \frac{R_1\cdot R_2}{R_1+R_2}[/tex]I am attaching a drawing showing the process of stepwise replacement of two resistances at a time (am using rectangles to represent a resistance). The left-most image shows the starting point, just a little bit "warped" to see it better. The two resistances (6 Ohm next to each other) are in parallel and are replaced by a single resistance (3 Ohm, see formula above) in the top middle image. Next, the two resistances (9 and 3 Ohm) are nicely in series, so they can be replaced by their sum, which is what happened going to the top right image. Finally we have two resistances in parallel and they can be replaced by a single, final, resistance as shown in the bottom right image. That (4 Ohms) is the equivalent resistance of the original circuit.
Using these two transformations you will be able to solve step by step any problem like this, no matter how complex.
If an object doubles in mass, what happens to its momentum? Explain why.
The pot shown in the picture is made of two different metals. Why is the handle made of a different metal than the rest of the pot? A) The handle needed to be made out of a material that would not melt. B) The metal that the pot is made out of is too weak to make the handle. C) It would have been too expensive to make the handle out of the same metal. D) The metal in the handle can absorb more energy without changing temperature as easily as the metal in the pot.
Generally the metal of container is made up of such material that it will absorb heat and distribute it on the surface so that the temperature can rise and it will help to cook the food
But the handle of the container is used to hold it and we need not its temperature to be vary high so the handle must be made up of different material which will not absorb too much heat and its temperature will not rise to high value so that we can hold it easily
so here most appropriate option is given as
D) The metal in the handle can absorb more energy without changing temperature as easily as the metal in the pot.
Answer:
D) The metal in the handle can absorb more energy without changing temperature as easily as the metal in the pot.
Imagine a car traveling in a straight line with the cruise control engaged. This means that the vehicle is moving with a constant speed, more specifically, constant velocity (speed and direction). This situation can be equated to a falling object at terminal velocity, where the falling speed reaches its maximum point, CANNOT increase.
Considering the car traveling at cruise control described above, the forces are balanced and therefore the net force is zero.
After reading through all of the above, I don't find a question that needs to be answered.
But I just want to say:
Yep. Uh huh. Fer sher. You are true. Words of higher veracity are unlikely to be found. Every word of that scenario and its description is accurate, and cannot be debated or disputed in any wise.
What's more, I agree, and I thank you for the points.
Katlyn makes a gelatin dessert. She pours hot water into the flavored gelatin powder and stirs. What are the solute and solvent in this solution? A. Heat is the solute. Gelatin powder is the solvent. B. Gelatin powder is the solute. Heat is the solvent. C. Water is the solute. Gelatin powder is the solvent. D. Gelatin powder is the solute. Water is the solvent.
Katlyn pours hot water into the flavored gelatin powder and stirs.
Gelatin powder is the solute. Water is the solvent. (D)
The correct answer is D. Gelatin powder is the solute and water is the solvent in the gelatin dessert that Katlyn makes. Water is the component in the larger amount and is responsible for dissolving the gelatin powder.
When Katlyn makes a gelatin dessert, she is creating a solution by mixing two substances. In this context, the gelatin powder is the solute, which is the substance that gets dissolved, and the hot water is the solvent, which is the substance that does the dissolving. Therefore, the correct answer to the question is D. Gelatin powder is the solute. Water is the solvent.
Solvents are typically the component of a solution that is present in the larger amount and usually determines the phase (solid, liquid, or gas) of the solution. In Katlyn's case, the solvent - water - is a liquid, which then forms a gel upon cooling, as the dispersed gelatin molecules create a three-dimensional network in the cooled dessert.
According to Newton’s second law of motion when an object is acted on by an unbalanced force how will that object respond
according to newton's second law , the net force on an object is the product of mass and the acceleration of the object. The formula is given as
[tex]F_{net}[/tex] = m a
where m = mass of the object and a = acceleration of the object.
when an unbalanced force acts on an object , there is a net force acting on the object and hence the object accelerate as a result.
hence the object accelerate in the direction of net force.
The latent heat of vaporization for ethyl alcohol is 854 J/g. The amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is J.
Answer:
4441 J
Explanation:
The amount of energy needed to change the ethyl alcohol from liquid to gas state is given by
[tex]Q=m \lambda_v[/tex]
where
m = 5.20 g is the mass of the alcohol
[tex]\lambda_v = 854 J/g[/tex] is the latent heat of vaporization of the substance
Substituting the numbers into the formula, we find:
[tex]Q=(5.20 g)(854 J/g)=4,441 J[/tex]
Answer:
4441
Explanation:
The Use of force to move an Object is called ?
Awnser: Work
Explanation:
work is the act of using force
A block of mass 8.0 kg is held stationary on a slope whose surface is inclined 31 degrees relative to the horizontal.
When released it slides down the slope with a constant acceleration of 0.9 ms^-2.
Using your knowledge of forces, calculate the surface's coefficient of friction, μ. Assume g = 9.8 ms^-2.
Answer:
0.49
Explanation:
There are two forces acting on the block in the direction parallel to the surface of the inclined plane:
- The component of the weight of the block parallel to the incline:
[tex]mg \sin \theta[/tex]
where m = 8.0 kg is the mass of the block, g=9.8 m/s^2 and [tex]\theta=31^{\circ}[/tex] is the angle of the ramp
- The frictional force, given by:
[tex]\mu mg cos \theta[/tex]
where [tex]\mu[/tex] is the coefficient of friction.
The two forces act in opposite direction, and according to Newton's second law, their resultant is equal to the product of the mass of the block (m) and its acceleration (a):
[tex]mg sin \theta - \mu mg cos \theta = ma[/tex]
Since we knw that [tex]a=0.9 m/s^2[/tex], we can re-arrange the equation to find the coefficient of friction:
[tex]\mu = \frac{g sin \theta -a}{ g cos \theta}=\frac{(9.8 m/s^2)(sin 31^{\circ})-0.9 m/s^2}{(9.8 m/s^2)(cos 31^{\circ})}=0.49[/tex]
how do kinetic energy,gravitational potential energy and heat due to friction change as the marble rolls down the ramp
A scientist wants to publish a report on a general feeding habits of a moose in Canada. He should
A scientist wants to publish a report on a general feeding habits of a moose in Canada. He should observe as many moose as he can in as many locations as possible.
What is scientific observation?In science, observation is vital. Scientists gather and record data through observation, which allows them to create and subsequently test ideas and hypotheses. Scientists can observe in many different ways, including using their own senses or instruments like telescopes, thermometers, satellites, or stethoscopes.
These instruments enable more accurate and precise observations. Tools can also be used to collect data about subjects we can't directly experience, like deep space.
To publish a report on a general feeding habits of a moose in Canada, the scientist should observe as many moose as he can in as many locations as possible.
Learn more about observation here:
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