Arthur (mass 79 kg) and Violet (mass 50 kg) are trying to play on a seesaw. If Violet sits 4 m from the fulcrum, at what distance from the fulcrum should Arthur sit
Hi there!
There are two torques acting on the system:
τ (Arthur) = RW = R(790N)
τ (Violet) = RW = 4(500N) = 2000N
∑τ = 0 = τ(Violet) - τ(Arthur)
Thus:
τ(Violet) = τ(Arthur)
2000 = 790R
R ≈ 2.53m
5. SEP Construct Explanations If the line on
a distance-versus-time graph and the line on
a speed-versus-time graph are both straight
lines going through the origin, can the two
graphs be displaying the motion of the same
object? Explain.
Answer:
If and only if the object has 0 speed. Any other case is a no.
Explanation:
In increasing math complexity:
If the graph of a distance/time is a straight line with a non-zero slope it means that the velocity-time graph is an horizontal line where every point has the same second coordinate, equal to the value of the slope of the first line (ie, if the first line has equation [tex]y=2t[/tex] the second line will have equation [tex]y=2[/tex] - I'm using y to denote either the distance or the speed, read it as "the non-time variable")
If the graph of a speed/time is a straight line, the graph of the distance/time is the area of the region of space beneath the straight line in the first graph, ie a triangle. And as you increase the sides of that triangle keeping the angles fixed, you get a parabolic curve.
Bonus case: if [tex]v(t)= 0; d(t) = 0[/tex], they are both straight lines, they both pass through the origin, and they are the exact same line.
With calculus (or: math becomes fun after you add the alphabet to it)
You are asking if the answer of the IVP
[tex]\left \{ {{x'=x} \atop {x(0)=0}} \right.[/tex]
is a linear function. The answer is: besides the obvious [tex]x(t)'=x(t)=0 \ \forall t[/tex] there are no other solutions, linear or otherwise.
it is not 132m and plzz explain how the answer is 66m
Distance = 1/2 x velocity x time
Distance = 1/2 x 0.40 x 330
Distance = 66 meters
A 1,000 kg truck is traveling at 3 m/s. Suddenly, the driver sees a herd of cows on the road ahead and applies the brakes. The truck's tires could fail after doing 5,000 J of work to slow the vehicle. Can the truck stop before the tires fail?
A. Yes, the total KE the tires need to transfer out of the system is less than 5,000 J.
B. Yes, the tires do not do any work, it is only the brakes that do work.
C. No, the truck had to stop suddenly and the quick change in KE will cause the tires to fail.
D. No, the total KE the tires need to transfer out of the system is more than 5,000 J.
This question involves the concepts of the law of conservation of energy and kinetic energy.
The correct option is "A. Yes, the total KE the tires need to transfer out of the system is less than 5,000 J".
According to the law of conservation of energy:
Loss in Kinetic Energy = Work done by the tires
[tex]\frac{1}{2}mv^2=W[/tex]
where,
W = work done by tires = ?
m = mass of the truck = 1000 kg
v = speed of the truck = 3 m/s
Therefore,
[tex]W=\frac{1}{2}(1000\ kg)(3\ m/s)^2[/tex]
W = 4500 J
Since the failure limit of work done by the tire is 5000 J, which is greater than the actual work done by the tire in this scenario. Hence, the tire will not fail in this case.
Learn more about the law of conservation of energy here:
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The attached picture explains the law of conservation of energy.
consider what you have learned in your astronomy class and this article about physical processes. what types of processes can emit gamma-rays?
Answer:
Gamma-rays are produced primarily by four different nuclear reactions; fusion, fission, alpha decay and gamma decay.
The type of process that can emit gamma - rays is nuclear reaction processes.
What is nuclear reaction?
A nuclear reaction is a type of reaction in which two nuclei collide to produce one or more new nuclides and release energy in the process.
Examples of nuclear reactions;
FussionFissionNuclear Decay.Each of the nuclear reaction above can emit gamma - rays.
Thus, the type of process that can emit gamma - rays is nuclear reaction processes.
Learn more about nuclear reaction here: https://brainly.com/question/25387647
Power of an electric motor is 1 h.p. what does it mean ?
Answer: HP = Horse Power.
Explanation: it is the unit given to tell the motor's particular power and 1hp = 746 watts.
If the coefficient of kinetic friction between the puck and the ice is 0.05, how far does the puck slide before coming to rest? Solve this problem using conservation of energy. initial speed is 5.3 m/s
Hi there!
We know that:
Ei = Ef
There is work being done on the object, so:
W = Force · displacement = F · d ⇒ work due to friction
KEi - Fd = KEf (0)
KEi = Fd
Input variables:
1/2mv² = μmgd
Cancel out the mass:
1/2v² = μgd
Solve for d:
1/2(5.3²)/(0.05 · 9.81) = 28.63 m
A camper stands in a valley between two parallel cliff walls. He claps his hands and notices that the echo from the nearby wall returns 0.9 s later while the echo from the farther wall returns 1.10 s later. If the air temperature is -10 C, how wide is the valley?
SOMEONE HELP PLS I WILL MARK CORRECT ANSWER BRAINLYEST ANSWER FAST PLEASE!!!!!
Answer:
C
Explanation:
A tennis ball thrown with a velocity of 25m/s[Fwd] in the horizontal direction from the top of an 80m high building.
1. How long does it take the tennis ball to reach the ground?
2. How far is the range (how far from the base of the building will the ball land) ?
3. What is the final velocity?
Even answering one will help me out and i will give brainlest!
Answer:
Explanation:
Ignoring air resistance
1) from vertical rest
s = ½at²
t = √(2s/a)
t = √(2(80)/9.8)
t = 4.040610...
t = 4.0 s
2) d = vt
d = 25(4.0)
d = 100 m
3) v² = u² + 2as
v² = 25² + 2(9.8)(80)
v² = 2193
v = 46.8294...
v = 47 m/s
θ = - 90 + arcsin(25/46.8294)
θ = -57.7339...
θ = 58° below the horizontal
the thermodynamic processes that occur in nature ____________.
Answer:
The thermodynamic processes that occur in nature convert thermal energy into mechanical energy.
The thermodynamic processes that occur in nature are according to the law of thermodynamics.
The thermodynamics processes seen in nature are guided by the law of thermodynamics. The role of energy and heat transmission in physical systems is guided by these laws.
The laws are:
(1) Energy cannot be created nor destroyed in a system, according to the first law of thermodynamics, Also, referred to as the law of energy conservation. Only from one form to another, the energy can be transmitted or altered. Energy is conserved through natural processes, keeping the overall amount constant.
(2) Second law of thermodynamics: states that the overall entropy of an isolated system tends to increase over time in any natural process. This suggests that processes progress towards a state of increasing disorder.
Hence, the thermodynamic processes are guided by the law of thermodynamics.
To learn more about Thermodynamics, here:
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consider an air-filled balloon weighted so that it is on the verge of sinking. now, if you push it beneath the surface, it will
Given our understanding of physics, we can conclude that once the balloon is pushed under the surface, it will sink.
One key factor to take into account here is to remember that the density of a ballon can change when exposed to a higher pressure. This is due to the elastic nature of the material that makes up the ballon, and the nature of gas atoms that allow them to be compressed.
Therefore, when the balloon is pushed underwater, the surrounding water will squeeze the balloon, thus incrementing its density. Once the density of the balloon rises, this, in addition to the weight to which it is attached, will make it heavier than the water it is in, and the balloon will sink.
To learn more visit:
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What makes rusting a redox reaction?
A. It is an example of combustion, which is a redox reaction.
B. Electrons are transferred from oxygen atoms to iron atoms.
C. Any reaction involving oxygen is a redox reaction.
D. Electrons are transferred from iron atoms to oxygen atoms.
(No links please)
Electrons are transferred from oxygen atoms to iron atoms is a redox reaction. Option B is correct.
What is a redox reaction?A redox reaction is a type of chemical reaction in which two species exchange electrons.
Any chemical process in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron is known as an oxidation-reduction reaction.
A redox reaction can result in the creation of hydrogen fluoride. The creation of hydrogen fluoride is another example of a redox reaction.
We can evaluate the oxidation and reduction of reactants by breaking down the process. Each hydrogen turns positive after being oxidized and losing two electrons.
Electrons are transferred from oxygen atoms to iron atoms is a redox reaction.
Hence, the option B is correct.
To learn more about the redox reaction, refer to the blink;
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Answer: D) Electrons are transferred from iron atoms to oxygen atoms
If anyone else needs it
Explanation: the iron is increasing in oxidation number (losing electrons) and oxygen is decreasing in oxidation number (gaining electrons). This tells us that we have oxidation (or rusting) taking place.
An object of mass of 2.0 kg rotates at constant speed in a horizontal circle of radius 5.0 m. The time
for one complete revolution is 3.0 s. What is the magnitude of the resultant force acting on the object.
Explanation:
follow the above attachment to get the answer.
what frequency of an electromagnetic wave having a wavelenght of 300,000km?
[tex]\huge \bf༆ Answer ༄[/tex]
As we know the relationship between frequency, wavelength and wave speed , we can infer that : -
[tex] \sf \: f = \dfrac{ v}{λ} [/tex]
Terms in the formula
f = frequency v = wave speed = 3 × 10⁸ m/s[ v of all electromagnetic waves is 3 × 10⁸ m/s]
λ = wavelength = 3 × 10⁵ kmλ = 3 × 10⁵ × 10³ mλ = 3 × 10⁸ mTime to find the frequency : -
[tex] \sf \: f = \dfrac{3 \times 10 {}^{8} }{3 \times 10 {}^{8} } [/tex][tex] \sf \: f = 1 \: sec {}^{ - 1} or \: hertz[/tex][tex]꧁ \: \large \frak{Eternal \: Being } \: ꧂[/tex]
a box takes 350 N to start moving the coefficient of static friction is 0.35. what is the weight of the box?
Answer:
101.937 kg
Explanation:
The force needed to get the box moving must just cancel the static friction force:
F = µsmg = 0.35•m•9.81 = 350 ---> m = 350 / (0.35•9.81) = 101.937 kg
Again, with units shown, and using 1 N = 1 kg•m/s2:
0.35•m•9.81(m/s2) = 350 N
solving for m:
m = 350 N / (0.35•9.81 m/s2) = (350 kg•m/s2) / (3.434 m/s2 ) = 101.937 kg
______________________
(Hope this helps can I pls have brainlist (crown)☺️
What kind of feature results from the convergence of two oceanic plates?
A.
island arcs
B.
massive continental volcanoes
C
rift valleys
D.
tall mountain ranges
Answer:
A
Explanation:
Convergence is pushing them together so C is out of the question.
B and D are wrong because it is an oceanic plate. B and D are for continental plates.
[tex] \huge \mathcal{Question}[/tex]
Help ! FBD (free body diagram) required
Select all correct choices ~
Thanks for Answering ! have a great day ~
[tex] \huge \bf༆ Answer ༄[/tex]
According to the given question,
Normal reaction = mg Cos 37° + ma Cos 53°
here,
m = mass of the block = 1 kg
a = Acceleration of wedge = 5 m/s²
g = Acceleration due to gravity = 10 m/s²
Calculation : - [tex] \sf \: mg \cos(37) + ma \cos(53) [/tex][tex] \sf \: \bigg(1 \times 10 \times \dfrac{4}{5} \bigg) + \bigg( 1 \times 5 \times \dfrac{3}{5} \bigg)[/tex][tex] \sf(2 \times 4) + (1 \times 3)[/tex][tex] \sf8 + 3[/tex][tex] \sf11 \: N[/tex]The Correct choice is C
[tex]꧁ \: \large \frak{Eternal \: Being } \: ꧂[/tex]
A student has fallen behind on her homework and suddenly realizes that a big research paper is due the next day and she has not even started working on it. She panics, staying up all night to write her paper, but still runs out of time. At the last minute, she finds a research paper online that covers the same topic as her paper, and she copies and pastes large portions of text from the website into her paper. The student’s behavior is an example of what? a violation of intellectual property rights an online invasion of privacy inappropriate use of Internet sites an incident of cyberbullying
Answer:
Violation of intellectual property rights
Explanation:
Im sorry I am late but for the future people its A! :)) Have a great day :)
Trên một sợi dây đàn hồi dài 1,2 m hai đầu cố định đang có sóng dừng Biết sóng truyền trên dây có tần số 100 Hz và tốc độ 60 m trên giây số nút sóng trên dây là
Answer:english please
Explanation:
A person who sits on the right-hand seat of the car that is making a left turn slides over to the right. What is the possible reason for this?
Answer:
zsjgbjidasngwhugbhwuabvhuvbwhuebewghvwev
Explanation:
11111111111111111111111111111111111111111111111111111
• What net force is needed to accelerate a 1200 kg car along a
horizontal surface from rest to 130 km/h in 80 seconds?
Hi there!
We can begin by converting 130 km/h to m/s:
[tex]\frac{130km}{1hr} * \frac{1hr}{3600s} * \frac{1000m}{1km} = 36.11 m/s[/tex]
Find the acceleration associated with this velocity change in the given time frame:
vf = vi + at (vi = 0 m/s)
vf = at
vf/t = a
36.11/80 = 0.45 m/s²
Now, we can calculate Net Force using Newton's Second Law:
∑F = ma
∑F = (1200)(0.45) ≈ 540 N
An object has an acceleration of 12.0 m/s/s. If the NetForce was tripled and the mass was doubled, then the new acceleration would be _____ m/s/s
Answer: that would be New acceleration would be 12 m/s²
Explanation:
foetus grows by receiving nutriens and oxygen from the mother. How does the foetus receive these nutriens and oxygen?
Answer:
From the very beginning, the developing cells need oxygen and nutrients. The fetus receives its nutrition from the mother through the placenta and the umbilical cord.
Explanation:
Hi can u help me in my physics homework
Answer:
a.) [tex]5 seconds[/tex]
b.) [tex]9.5 m/s[/tex]
Explanation:
Solution is attached.
how long does it take saturn to revolve around the sun
Answer: about 29.4 Earth years
Orbit and Rotation
One day on Saturn takes only 10.7 hours (the time it takes for Saturn to rotate or spin around once), and Saturn makes a complete orbit around the Sun (a year in Saturnian time) in about 29.4 Earth years (10,756 Earth days).
20 examples of electropositive radical
Describe what introspection is.
Answer:
Introspection is a process that involves looking inward to examine one's own thoughts and emotions. ... The experimental use of introspection is similar to what you might do when you analyze your own thoughts and feelings but in a much more structured and rigorous way.
Explanation:
Example of it: The definition of introspection is self-examination, analyzing yourself, looking at your own personality and actions, and considering your own motivations. An example of introspection is when you meditate to try to understand your feelings. noun.
Answer: Introspection is when you examine your own thoughts, feelings, and emotions. A spiritual idea of introspection is like examining your soul while a pyschological way would be examining your mental state.
Explanation: tried my best
Which is required for
conduction?
A.moving fluids
B. Two substances in direct
contact with one another
C. Two substances in close proximity, but not necessarily touching
Answer:
You need (B) Two substances in direct contact with one another to have conduction.
I hope this helped at all.
A person makes a loud sound and hears the echo of this sound 1.2s later .calculate how far the person is from the object causing the echo assume that the speed of sound is 330m/s calculate the distane
Answer:
198m
Explanation:
Distance = speed x time
. d = 330m/s x 1.2s = 396m
This is the distance travelled by the sound from the person to the object and then back to the person. To get the distance from the person to the object, we would have to divide by 2.
. distance = 396 / 2 = 198m