Answers
Answer:
Any two charged particles will exert a force on each other. Opposite charges will produce an attractive force while similar charges will produce a repulsive force. The greater the charges, the greater the force.
Explanation:
Related Questions
why do buses carry luggage in the apartment situated in the lower parts instead of the roof racks
Answers
Answer:
there usually in lower parts so they don't fall
Explanation:
Look at the equation. What detail is missing? 3 m/s2= (33 m/s - X)/30 S
Answers
Answer:
The starting velocity.
Explanation:
We must understand that this equation comes from the following equation of kinematics.
\(v_{f}=v_{o}+a*t\)
where:
Vf = final velocity = 33 [m/s]
Vo = starting velocity [m/s]
a = acceleration = 3 [m/s²]
t = time = 30 [s]
So, these values can be assembly in the following way:
\(v_{f}=v_{o}+a*t\\a*t=v_{f}-v_{o}\\3=\frac{33-v_{o}}{30}\)
This exercise uses Newton's Law of Cooling.
A roasted turkey is taken from an oven when its temperature has reached 185°F and is placed on a table in a room where the temperature is 78°F.
(a) If the temperature of the turkey is 150°F after half an hour, what is its temperature after 45 min? (Round your answer to the nearest whole number.)
Incorrect: Your answer is incorrect.
°F
(b) After how many hours will the turkey cool to 100°F? (Round your answer to one decimal place.)
Answers
Answer:
(a) 137 °F
(b) 2.0 hr
Explanation:
Given a turkey is removed from the oven at 185 °F to a room temperature of 78 °F and cools to 150 °F after 30 minutes, you want to know the temperature after 45 minutes, and the time to cool to 100 °F.
Newton's cooling equationThe temperature described by Newton's Law of Cooling can be written as the equation ...
T(t) = (initial temperature difference) × (cooling factor)^(t/(cooling period)) + (final temperature)
Here, the initial temperature difference is 185 -78 = 107 °F. The cooling factor is (150 -78)/(185 -78) = 72/107 in a period of 30 minutes.
Thus, we can write the temperature equation as ...
T(t) = 107×(72/107)^(t/30) . . . . . . . where t is time in minutes
(a) 45 minutesWhen t=45, the temperature is ...
T(45) = 107×(72/107)^(45/30) +78 ≈ 137 . . . . . degrees F
After 45 minutes, the temperature is 137 °F.
(b) 100 °FWhen T = 100 °F, the time is ...
100 = 107×(72/107)^(t/30) +78
22/107 = (72/107)^(t/30)
30×log(22/107)/log(72/107) = t ≈ 119.783 . . . . minutes
t = 119.783/60 = 1.996 . . . . hours
The turkey cools to 100 °F after 2.0 hours.
the distance between an object and its real image is 40 cm, if the magnification is 3, calculate the object and image distance if the focal length of the lens is 15 cm
Answers
The object distance of the lens is 10 cm and the image distance of the lens is 30 cm.
What is the image and object distance?The object and image distance formed by the lens is calculated by applying the following lens formula.
v + u = 40 ------- (1)
v/u = 3 ------------ (2)
v = 3u
Substitute v into equation (1);
3u + u = 40
4u = 40
u = 40/4
u = 10 cm
The image distance = 3u
= 3 x 10 cm
= 30 cm
Thus, the object distance is 10 cm and the image distance is 30 cm.
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My dream house
Read the text. Drag the words to fill in the gaps to complete it.
stay
electronic
porch
My dream house has lots of rooms and windows. It has a big red front door. There is also a
with a round table and several chairs around it.
There is a living room with comfortable sofas and a big TV screen on the wall. My family likes to spend time together watching TV. In the attic, there is a game room for me and my friends. It has a fridge for drinks and snacks. There are extra bedrooms. My friends can
there at night.
My bedroom is green. Green is my favourite colour. There are lots of shelves for my toy car collection. I am a fan of old cars.
There are lots of posters of my favorite actors and singers. And there is also an
clock that shows the time on the screen.
There is also a new computer, a sound system, and a telescope because I love astronomy. My bed is special. It is in the shape of a car, and it is very comfortable. My bed is next to the window.
Back
Check
Answers
Answer:
1 - porch, 2 - stay, 3 - electronic
what is soil texture?
Answers
Explanation:
soil texture-the relative content in the soil of precipitation rock or anthropogenic formations of particles of various sizes independent of the chemical or mineralogical composition
A student club is designing a trebuchet for launching a pumpkin into projectile motion. Based on an analysis of their design, they predict that the trajectory of the launched pumpkin will be parabolic and described by the equation y(x)=ax2+bx where a=−8.0×10−3m−1, b=1.0(unitless), x is the horizontal position along the pumpkin trajectory and y is the vertical position along the trajectory. The students decide to continue their analysis to predict at what position the pumpkin will reach its maximum height and the value of the maximum height. What is the derivative of the vertical position of the pumpkin trajectory with respect to its horizontal position?
Answers
Answer:
The maximum height the pumpkin reaches occurs at 62.5 horizontal meters from its launching spot.
Explanation:
Notice that we are given the actual trajectory equation:
\(y=-0.008 \, x^2+x\)
which corresponds to a curve represented by a parabola.
We can find the maximum of this parabola with arms pointing down requesting the derivative (slope of the tangent line to the curve) to be zero :
\(y'=-0.016\,x+1\\0=-0.016x+1\\x=\frac{1}{0.016} \\x=62.5\,\,m\)
The maximum height the pumpkin reaches occurs at 62.5 horizontal meters from its launching spot.
The calculation is as follows;The equation is
\(y = -0.008x^2 + x\)
that corresponds to a curve presented by a parabola.
Now we can determine the maximum of this parabola with arms pointing down requesting the derivative slope of the tangent line to the curve to be zero
So,
\(y' = -0.016x + 1\\\\0 = -0.016x + 1\\\\x = 1/div 0.016\\\\\)
= 62.5m
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when is an objects average speed the same as the average velocity
Answers
Explanation:
When the direction of motion is same and displacement equals to the distance travelled by the object.
How much energy is required to heat 70 g of water at 20°C to boiling
(100°C) if the specific heat of water is 4.184 J/g °C? Formula is Q=MCAT
29,288 J
23,430 J
5,858 J
35,146 J
Answers
Answer:
\(Q=23,430J\)
Explanation:
Hello,
In this case, since we compute the required energy via:
\(Q=mC\Delta T\)
Whereas m is the mass which here is 70 g, C the specific heat which for water is 4.184 J/(g°C) and ΔT is the temperature difference which is:
\(\Delta T=100-20=80\°C\)
Therefore, the energy turns out:
\(Q=70g*4.184\frac{J}{g\°C}*80\°C\\ \\Q=23,430J\)
Best regards.
how is newtons first law of motion related to the concept of inertia?
Answers
A child weighs 326 N. What is the child's mass?
Please help!!
Answers
The mass of the child is 33.26 kg.
What is mass?Mass can be defined the quantity of matter a body contained.
The S.I unit of mass is kilogram (kg)
To calculate the mass of the child, we use the formula below.
Formula:
W = mg............. Equation 1Where:
W = Weight of the childm = mass of the childg = acceleration due to gravityMake m the subject of the equation
m = W/g.............. Equation 2From the question,
Given:
W = 326 Ng = 9.8 m/s²Substitute these values into equation 2
m = 326/9.8m = 33.26 kgHence, the mass of the child is 33.26 kg.
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Which of the following quantitative research methods should a researcher use when trying to understand the political views held by the young population of a specific area? a.) Participant observation b.) Written surveys c.) Secondary data analysis d.) Laboratory experiments
Answers
Answer:
Options B
Explanation:
The appropriate quantitative research method for understanding political views held by the young population of a specific area is written surveys (option b). Surveys allow for the collection of data from a large number of participants, and specific questions can be asked to gather data on political views.
Participant observation (option a) involves direct observation of individuals in a natural setting, which may not be practical for studying political views.
Secondary data analysis (option c) involves analyzing data that has already been collected, and may not be specific to the young population or the area of interest.
Laboratory experiments (option d) are typically used to study cause-and-effect relationships between variables, which may not be applicable to studying political views.
Therefore, the best option for understanding the political views held by the young population of a specific area is written surveys.
To understand the political views of the young population of a specific area, a researcher can use written surveys, participant observation, and secondary data analysis as quantitative research methods.
Explanation:If a researcher is trying to understand the political views held by the young population of a specific area, they should use written surveys, participant observation, and secondary data analysis as quantitative research methods.
Written surveys: This method involves distributing survey questionnaires to gather data on political opinions from a sample of the young population in the area. Participant observation: This method involves the researcher immersing themselves in the community and directly observing and interacting with individuals to understand their political views.Secondary data analysis: This method involves analyzing existing data sources, such as census records or previous surveys, to gain insights into the political views of the young population in the area.Learn more about Quantitative Research Methods here:https://brainly.com/question/33505242
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How much impulse is imparted on a 0.14 kg baseball initially traveling at 32 m/s when it is struck by a baseball bat and begins to travel in the opposite direction at 49 m/s
Answers
ANSWER AND EXPLAINATION:
To calculate the impulse imparted on the baseball, we can use the impulse-momentum principle, which states that the impulse experienced by an object is equal to the change in momentum of the object. Mathematically, it can be expressed as:
Impulse = Change in momentum
The momentum of an object is given by the product of its mass and velocity:
Momentum = mass × velocity
In this case, the baseball has an initial mass of 0.14 kg and an initial velocity of 32 m/s. After being struck by the bat, it travels in the opposite direction at a velocity of 49 m/s.
Therefore, the change in momentum is given by:
Change in momentum = (mass × final velocity) - (mass × initial velocity)
Change in momentum = mass × (final velocity - initial velocity)
Change in momentum = 0.14 kg × (49 m/s - (-32 m/s))
Change in momentum = 0.14 kg × (49 m/s + 32 m/s)
Change in momentum = 0.14 kg × 81 m/s
Change in momentum = 11.34 kg·m/s
So, the impulse imparted on the baseball is 11.34 kg·m/s.
Explain in your own words what is the fourth commandment.
Answers
the fourth commandment is to remember my Sabbath day which is to not do any labor on the 7th day which is Sunday.
Explanation:
hope this helps I don't know if you meant from the Bible or not.
Answer:
From Wikipedia, the free encyclopedia. The Fourth Commandment of the Ten Commandments may refer to: "Remember the sabbath day, to keep it holy", under the Philonic division used by Hellenistic Jews, Greek Orthodox and Protestants except Lutherans, or the Talmudic division of the third-century Jewish Talmud
Explanation:
I hope this helps
PLEASE GIVE ME BRAINLEST i really need this
12. An advertisement for an all-terrain vehicle (ATV) claims that the ATV can climb
inclined slopes of 35°. What is the minimum coefficient of static friction needed for
this claim to be possible?
Answers
The minimum coefficient of static friction required for this claim to be made possible is 0.7
In an inclined plane system, the coefficient of static friction is the angle at which an object slide over another.
The gravitational force component exceeds the static friction force when the angle rises. Hence, the object begins to slide.
According to Newton second law;
\(\sum F_x = \sum F_y = 0\)
\(\mathbf{mg sin \theta -f_s= N-mgcos \theta = 0 }\)
On the L.H.S\(\mathbf{mg sin \theta =f_s}\)
\(\mathbf{mg sin \theta =\mu_s N}\)
On the R.H.SN = mg cos θ
Equating both force components on the L.H.S and R.H.S, we have the following
\(\mathbf{mg sin \theta =\mu_s \ mg \ cos \theta}\)
\(\mathbf{sin \theta =\mu_s \ \ cos \theta}\)
\(\mathbf{\mu_s = \dfrac{sin \theta }{ cos \theta}}\)
According to the trigonometry rule:
\(\mathbf{tan \theta= \dfrac{sin \theta }{ cos \theta}}\)
∴
\(\mathbf{\mu_s =\tan \theta}}\)
\(\mathbf{\mu_s =\tan 35^0}}\)
\(\mathbf{\mu_s = 0.700}}\)
Therefore, we can conclude that the minimum coefficient of static friction needed for this claim to be possible is 0.7
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A swimmer capable of swimming with velocity v relative to water jumps in a flowing river having velocity u. The man swims a distance d downstream and returns back to the original position. Find out the time taken in complete motion.
a. 2dv/v^2 - u^2
b. dv/v^2 - u^2
c. 3dv/v^2 - u^2
d. 4dv/v^2 - u^2
Answers
The duration of the motion when a swimmer with a swimming velocity of v in relation to the water jumps into a river with a flowing velocity of u is measured as 2dv/v2 - u2.
What is motion?Motion is the gradual change in an object's position over time. Displacement, distance, velocity, acceleration, time, and speed are all used to describe motion. In physics, motion is a function of a body's position or orientation over time. Translation is defined as movement along a line or a curve. Rotation is a motion that modifies a body's orientation. Motion is the shift in an object's position with respect to time. When an object's position changes over time, it is said to be in motion. By mentioning a reference point, we are able to describe the location of an object. Relative motion exists. An object's distance is defined as the length of its total path.
Here,
t1=d/(u+v)
t2=d/(u-v)
t=t1+t2
=d/(u+v)+d/(u-v)
t=2dv/v²-u²
When a swimmer with a swimming velocity of v jumps into a river with a flowing velocity of u, the length of the motion is calculated as 2dv/v2 - u2.
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In the 4.6 billion year history of the Earth, how many times have continents of our planet gone through major shifts if these shifts happen on average every 395 million years?
Answers
Continents have undergone major shifts around 12 times.
To calculate the number of times continents have gone through major shifts in the 4.6 billion year history of the Earth, we can divide the total time span by the average duration between shifts.
Total time span = 4.6 billion years
Average duration between shifts = 395 million years
To convert the total time span to years, we multiply 4.6 billion by 1 billion (1 billion = 1,000 million).
Total time span in years = 4.6 billion years × 1 billion = 4.6 × 10^9 years
Now we can calculate the number of shifts by dividing the total time span by the average duration between shifts:
Number of shifts = Total time span / Average duration between shifts
= (4.6 × 10^9 years) / (395 million years)
≈ 11.65
Therefore, continents of our planet have gone through major shifts approximately 11.65 times in the 4.6 billion year history of the Earth. Since we cannot have a fraction of a shift, we can round the result to the nearest whole number. Thus, continents have undergone major shifts around 12 times.
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the two forces acting on a boat or some other floating object _______are and gravity
Answers
Answer:
The two forces acting on a boat or some other floating object are buoyancy and gravity
Answer: buoyant forceExplanation:two forces acting on a boat or some other floating object are buoyant force and gravityhi friend your answerI hope it will be helpful for you
mark as brainest answer
thank you
Which is one feature of tropical wet-dry climates that tropical wet climates do not have?
savannas
rainforests
year-round rain
no change of seasons
Answer : A Savannas
Answers
Answer:
a
Explanation:
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Which of these is one of the five determinants of health?
A. The gender of your doctor
B. Your access to health services
C. The type of sport you play
D. The amount
your insurance deductible
Answers
Answer:
B
Explanation:
3. Which vehicle has more momentum? *
1 point
A.
B
VA= 25 m/s
Ug = 20 m/s
ma= 15000 Kg me = 15000 Kg
Ο Α
О.
B
Answers
Answer:
the one with v = 25 m/s
Explanation:
Momentum = m * v
if they both have the same mass (15000 kg) , then the one with the higher v has more momentum...I think A= 25 m/s
why does a bus look red in the daylight?
Answers
Answer:
The red color in the sky at sunset (and sunrise) is due to an effect called Rayleigh scattering.
Explanation:
i’ll give brainliest answer to correct one, please help
Answers
Answer:
i believe its D because he is not sliding and he is applying force on the wall
Explanation:
hope this helps plz mark brainliest
Select the option no explanation needed
Answers
——
Answer:
c
Explanation:
the formula Torque = Force X Distance. While distance is measured in meters and force is measured in newton so torque is measured in newton ⋅ meter
Explaining How Temperature
Does sound travel faster in a warm room or a cold room?
Explain your answer.
Intro
Do
Answers
Answer:
Explanation:
Sample Response: Sound travels faster in a warm room because temperature affects the speed of a wave. In a warm room, the particles of air move faster and have higher chances of bumping into each other, which then increases the instances of energy transfer.
A 12-volt battery causes 0.60 ampere to flow through a circuit that contains a lamp and a resistor connected in parallel. The lamp is operating at 6.0 watts.
Calculate the resistance of the resistor.
A: 7.2
B: 60
C: 72
D: 120
Answers
The resistance of the resistor is 120 Ω
What is resistance?"Resistance is a measure of the opposition to current flow in an electrical circuit."
Data given
Power of lamp (P)= 6 W,
Emf of cell (V)= 12 Volt
Current drawn from cell (i) = 0.6 A
Combination is parallel, it means the potential on resistor and lamp is same, so current taken by lamp, by formula,
P= V .i
Substitute the values,
6 = 12× i
i = \(\frac{6}{12}\)
i = 0.5 A ( current taken by lamp) so current taken by resistor,
\(i_{r} = 0.6-0.5 =0.1 A\)
Now the resistance of resistor, by formula,
\(R = \frac{V}{i_{r} }\)
\(R = \frac{12}{0.1} \\R = 120\) Ω
Hence the resistance of the resistor is 120 Ω.
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The string will break if the tension in
it exceeds 0.180 N. What is the
smallest possible value of d (in cm)
before the string breaks?
Answers
Answer:
define d first?
you need to list more variables
Answer:
list more valuable unit
A man standing on the Earth can exert the same force with his legs as when he is standing on the moon. We know that the mass of the man is the same on the Earth and the moon. We also know that F=ma is true on both the Earth and the moon. Will the man be able to jump higher on the moon than the Earth? Why or why not?
PLEASE HELPPPP
Answers
Answer:
yes
Explanation:
earth has gravity force that is high than the moon gravity force which is 1/6 of earth gravity
Earth has gravity force that is high than the moon gravity force which is 1/6 of earth gravity.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The force on the moon is less than earth as gravity is 1/6 on the moon
When man jump than he will jump high on the moon than the earth.
Earth has gravity force that is high than the moon gravity force which is 1/6 of earth gravity.
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this is electricity in physics please help
Answers
Explanation:
a. (i) When the variable resistor is set at zero, the only resistance in the circuit is due to the lamp. So the current flowing through the circuit is
\(I = \dfrac{V}{R} = \dfrac{220\:\text{V}}{440\:Ω} = 0.5\:\text{A}\)
(ii) The power output P of the lamp is given by
\(P = I^2R = (0.5\:\text{A})^2(440\:Ω) = 110\:\text{W}\)
b. (i) The variable resistor is in a series connection to the lamp so when its value is set to its maximum value of 660 Ω, the total resistance of the circuit is simply the sum of the two resistances:
\(R_T = R_{vr} + R_L = 660\:Ω + 440\:Ω = 1100\:Ω\)
Therefore, the current through the circuit is
\(I = \dfrac{V}{R_T} = \dfrac{220\:\text{V}}{1100\:Ω} = 0.20\:\text{A}\)
(ii) Using the result in Part (ii), we can solve for the potential difference across the lamp as follows:
\(V_L = IR_L = (0.20\:\text{A})(440\:Ω) = 88\:\text{V}\)
(iii) The power output of the lamp is
\(P = I^2R_L = (0.20\:\text{A})^2(440\:Ω) = 17.6\:\text{W}\)
(iv) The rate at which electrical energy is supplied, i.e., the power output of the circuit is equal to the square of the current multiplied by the total resistance of the circuit:
\(P = I^2R_T = (0.20\:\text{A})^2(1100\:Ω) = 44\:\text{W}\)
A 0.70-kg disk with a rotational inertia given by MR 2/2 is free to rotate on a fixed horizontal axis suspended from the ceiling. A string is wrapped around the disk and a 2.0-kg mass hangs from the free end. If the string does not slip then as the mass falls and the cylinder rotates the suspension holding the cylinder pulls up on the mass with a force of______
Answers
Answer:
The force will be "9.8 N".
Explanation:
The given values are:
mass,
m = 0.7 kg
M = 2
g = 9.8
Now,
⇒ \(\tau = T \alpha\)
then,
⇒ \(\frac{1}{2}mR^2(\frac{1}{R}\frac{dv}{dt}) =M(g-a_t)R\)
⇒ \(\frac{1}{2}m \ a_t=m(g-a_t)\)
⇒ \(a_t=\frac{2g}{(\frac{m}{M} +2)}\)
On substituting the values, we get
⇒ \(=\frac{2\times 9.8}{\frac{0.7}{2} +2}\)
⇒ \(=8.34 \ m/s\)
hence,
⇒ \(T=mg+M(g-a_t)\)
On substituting the values, we get
⇒ \(=0.7\times 9.8+2(9.8-8.34)\)
⇒ \(=6.86+2(1.46)\)
⇒ \(=6.86+2.92\)
⇒ \(=9.8 \ N\)