Answers
Answer:
Tarzan will be moving at 7.4 m/s.
Explanation:
From the question given above, the following data were obtained:
Height (h) of cliff = 2.8 m
Initial velocity (u) = 0 m/s
Final velocity (v) =?
NOTE: Acceleration due to gravity (g) = 9.8 m/s²
Finally, we shall determine how fast (i.e final velocity) Tarzan will be moving at the bottom. This can be obtained as follow:
v² = u² + 2gh
v² = 0² + (2 × 9.8 × 2.8)
v² = 0 + 54.88
v² = 54.88
Take the square root of both side
v = √54.88
v = 7.4 m/s
Therefore, Tarzan will be moving at 7.4 m/s at the bottom.
Related Questions
Newton's first Law implies that an object at rest will remain at rest unlss a net force acts on it / TRUE or FALSE?
Answers
Answer:
True
Explanation:
If an object is at rest it will stay at rest unless a force acts on it.
1) A spring, which has a spring constant k=7.50 N/m, has been stretched 0.40 m from ts equilibrium position . What the potential energy now tored in the spring ?
Answers
[tex]\displaystyle U_s = 0.6 \ J[/tex]
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightPhysics
Energy
Elastic Potential Energy: [tex]\displaystyle U_s = \frac{1}{2} k \triangle x^2[/tex]
U is energy (in J)k is spring constant (in N/m)Δx is displacement from equilibrium (in m)Explanation:Step 1: Define
k = 7.50 N/m
Δx = 0.40 m
Step 2: Find Potential Energy
Substitute in variables [Elastic Potential Energy]: [tex]\displaystyle U_s = \frac{1}{2} (7.50 \ N/m) (0.40 \ m)^2[/tex]Evaluate exponents: [tex]\displaystyle U_s = \frac{1}{2} (7.50 \ N/m) (0.16 \ m^2)[/tex]Multiply: [tex]\displaystyle U_s = (3.75 \ N/m) (0.16 \ m^2)[/tex]Multiply: [tex]\displaystyle U_s = 0.6 \ J[/tex]A hard rubber comb is pulled through a student's hair, and acquires a negative electric charge. This must mean that ---.
Question 2 options:
the comb is electrically connected to the ground
the comb is taking electrons from the hair
the hair is taking protons from the comb
the comb is creating electrons
Answers
Answer:
the comb is taking electrons from the hair
Explanation:
As given,
A hard rubber comb acquires a negative electric charge.
Before rubbing,
The comb and the hair are electrically neutral
So, when we rub the comb with the hair , the electrons are transferred to the comb and the hair losses its negative charge and ended up with the positive charge.
So,
The correct option is - the comb is taking electrons from the hair
At the bottom of a mine shaft, the air
pressure is 138,000 Pa. How deep is
the mine?
(Unit = m)
1 atm = 101300 Pa
Pair = 1.29 kg/m3
Plz help
Answers
Answer:2900
Explanation:
I think
If an apple experiences a constant net force, it will have a constant
Answers
Answer:
As Force = Mass × Acceleration. So If mass is constant, the acceleration would also be constant, in presence of a net external constant force!
[tex]2.25 \times 30[/tex]
Answers
I hope this helped <33
How often do very active sunspot and solar flare cycles take place?
Answers
Usually sunspot and solar flare cycles vary. But the average duration occurs every 11 years, sometimes 9-14 years as well.
Answer:
Every 11 years The solar cycle is the cycle that the Sun's magnetic field goes through approximately every 11 years.
Explanation:
Our Sun is a Large ball of electrically-charged hot gas. This charged gas moves, generating a powerful magnetic field. The Sun's magnetic field goes through a cycle, called the solar cycle.
Every 11 years or so, the Sun's magnetic field completely flips. This means that the Sun's north and south poles switch places. Then it takes about another 11 years for the Sun’s north and south poles to flip back again.
The solar cycle affects activity on the surface of the Sun, such as sunspots which are caused by the Sun's magnetic fields. As the magnetic fields change, so does the amount of activity on the Sun's surface.
Hope this helps!
Brain-List?
ASAP!! anyone else that has done this lab
Answers
nope
Explanation:
no i haven't sorry
Which type of wave needs a medium to travel?
ANSWER: sound waves, because they travel by oscillating molecules
What do both sound and light waves transfer?
ANSWER: Energy
How does an increase in amplitude affect sound and light waves?
ANSWER: louder sound and brighter light
What happens to the wavelength and speed of the waves when the frequency increases?
ANSWER: The wavelength decreases, but speed remains the same.
Which statement about sound waves is correct?
ANSWER: The animated particles are more concentrated along wave crests and less dense along wave troughs.
Answers
Answer:
Mechanical Waves
Why I Know:
Science Class
A type of wave that needs a medium to travel is sound wave because it travels through oscillating molecules.
What is a sound wave?A sound wave can be defined as a form of mechanical wave that requires a medium for its propagation and it creates a disturbance in the medium. Also, the energy of a sound wave travels in a perpendicular direction.
This ultimately implies that, a sound wave needs a medium to travel and it creates a disturbance when it travels through any medium.
In conclusion, a type of wave that needs a medium to travel is sound wave because it travels through oscillating molecules.
Read more on sound wave here: https://brainly.com/question/19250621
A dolphin has a mass of 740 kg. He swims along the water at a velocity of 12 m/s and
jumps out of the water so that he has Gravitational Potential Energy of 53000 J.
How high does the dolphin jump?
Answers
Answer:
I dunno
Explanation:
I really wanted to help you, but then I realized i didnt know how to
Why do we prefer a sharp knife to a blunt one to cut vegetables ?
Answers
(PLEASE) You go sledding down a hill and are traveling toward the east. At 0s, your velocity is 0m/s. At 5s, your velocity is 30m/s. Calculate your acceleration.
Answers
Answer:
your acceleration is 6 m/s²
Explanation:
Given;
initial velocity, u = 0
initial time, t₀ = 0
final velocity, v = 30 m/s
final time, t = 5 s
The acceleration of is calculated as follows;
[tex]a = \frac{v-u}{t_1-t_0} \\\\a = \frac{30-0}{5-0} \\\\a =\frac{30}{5} \\\\a = 6 \ m/s^2[/tex]
Therefore, your acceleration is 6 m/s²
1When you look through a magnifying glass, the objects you are looking at
seem larger and you can see them in morsetail. The lenses in a magnifying
glass are
Answers
convex lenses.
eyeglasses with convex lenses increase refraction, and accordingly reduce the focal lenght
Explain the theory of plate tectonics and how they have changed Earth’s surface over time. Include the role of plate tectonics in the creation of landforms.
Answers
Plate tectonic theory is the movement of the plates or slabs of rigid rocks over the surface of the earth or the molten rocks that is the mantel.
It explains how the continents have drifted over time due to the changes in the earth's geology over the years. It also explains how earthquakes, volcanic eruptions, and mountain ranges are created. Hence the arrangement and formation of the present shape of the earth continents.Learn more about plate tectonics and how they have changed Earth.
brainly.com/question/19649061.
What type of fronts form a hurricane?
Answers
Answer:
Hurricanes conditions occur when warm, moist air evaporates from the surface of the ocean and rises quickly. This warm air meets cool air in the higher elevations that causes condensation of the warm air vapor.
Explanation:
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I dont think hurricanes have any fronts
Explanation:
A hurricane usually contains an eye with sinking air, whereas mid-latitude cyclones have a center of low pressure with rising air. Hurricanes have their strongest winds around the eye of the hurricane where mid-latitude cyclones have their strongest winds aloft, in the jet stream.
An ice skater of mass 82 kilograms stands at rest in her skates on the ice rink. Someone throws a 5-kg ball at her at a speed of 17.4 m/s and she catches it. At what speed will she(and the ball) slide backwards?
Answers
Answer:
1 m/s
Explanation:
I showed my work in the picture attached.
This web page helped me solve this problem and understand inelastic collisions a little better:
https://byjus.com/physics/inelastic-collision/
She slide(and the ball) backwards at the speed of 1m/s when she catches the ball of 5-kg coming at speed of 17.4 m/s.
What is momentum ?Momentum is defined as mass times velocity. it tells about the moment of the body. it is denoted by p and expressed in kg.m/s. mathematically it is written as p = mv. A body having zero velocity or zero mass has zero momentum. its dimensions is [M¹ L¹ T⁻¹].
Momentum is conserved throughout the motion.
According to conservation law of momentum initial momentum is equal to final momentum.
Given,
mass of the skater m₁ = 82 kg
mass of the ball m₂ = 5kg
initial velocity of the ball v'₂ = 17.4 m/s
initial velocity of the skater v''₂= v'₁= 0
final velocity of the ball & skater = v''₁ = ?
According to law of conservation of momentum,
initial momentum = final momentum
m₁v'₁ +m₂v'₂ = m₁v₁'' + m₂v''₂
putting all values in the equation.
0+ 5×17.4 = 82×v₁'' + 5×v₁''
v₁''(82+5) = 87
v₁'' = 1 m/s
Hence he(and the ball) slide backwards at 1m/s
To know more about conservation of momentum click :
https://brainly.com/question/24301052
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The bus is heading southwest at 56 miles per hour is it veloctiy or speed
Answers
Answer:
Its velocity
Explanation:
Velocity is speed with a direction.
Speed is the rate at which someone or something is able to move or operate.
In the question its telling us that the bus is going 56 miles per hour but it aslo gives us a direction, in this case is southwest.
Shine the flashlight on the liquid sheet. Did you observe evidence that light carries energy
Answers
Answer:
Think of an object you have observed ... Work with your group to gather evidence that light carries energy, then answer the questions below. Shine the flashlight on the liquid crystal sheet.
Explain temperature and how it is measured.
PLEASE PLEASE HELP ME!! I NEED IT AND PLEASE DO IT IN YOUR OWN WORDS!! PLEASE I JUST NEED IT!! OWN WORDS PLEASE!!
Answers
Answer:
temperature is the degree of heat in a item or object and is measured by a thermometer.
Explanation:
Which list below contains only ionic compounds?
A. CaCl2, H2O, LIF
B. CO2, K20, P4010
C. LiF, CaCl2, Mgo
D. NO2, Mgo, CuCl2
Answers
Answer:
C. LiF, CaCl2, MgO
Explanation:
Ionic compound: It is that compound which consist of negative and position ions and held together by electrostatic force of attraction.
The ionic compound is neutral.
The ionic compound formed between metal and non-metal.
Covalent compound: It is that compound in which sharing of electrons between two atoms occur.
A.[tex]CaCl_2,H_2O,LiF[/tex]
H2O is not ionic compound. It is polar covalent.
Therefore, it does not contain only ionic compounds.
B.CO2,K2O,P4O10
CO2 and P4O10 are not ionic .It is covalent.
Therefore, it does not contain only ionic compounds.
C. LiF,CaCl2 ,MgO
All compounds are ionic because in given compounds one ion is negative and one is metal (positive).
Therefore, it contains only ionic compounds.
D.NO2,MgO,CuCl2
NO2 is not ionic.
Therefore, it does not contain only ionic compounds.
Option C is correct.
1.
During parkour, a person leaps at a wall and performs a flip. What must they do to change
directions?
6
Answers
Answer:
they push off the wall with a force greater than the wall
Explanation:
The game of parkour involves moving from one point to another and performing several skills which includes flips, especially in a difficult environment.
To change directions, the person must exert a significant force on the wall.
When the person leaps on the wall, it means the person moves or jumps quickly on the wall.
While this is being carried out, the concept of force must be applied.
If the force that acts on a stationary object is smaller than the required force to move the object, the object's position remains unchanged.
This means that for the person's direction to change, the person must exact a great force (or a significant force) enough to cause a change in direction.
Read more about force at:
https://brainly.com/question/19734564
Could I please get some help on this question I don’t understand .
Answers
Answer:
12.5 m/s
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 0 m/s
Height (h) = 8 m
Final velocity (v) at 8 m above the lowest point =?
NOTE: Acceleration due to gravity (g) = 9.8 m/s²
The velocity of the roller coaster at 8 m above the lowest point can be obtained as follow:
v² = u² + 2gh
v² = 0² + (2 × 9.8 × 8)
v² = 0 + 156.8
v² = 156.8
Take the square root of both side
v = √156.8
v = 12.5 m/s
Therefore, the velocity of the roller coaster at 8 m above the lowest point is 12.5 m/s.
Suppose that the separation between two speakers A and B is 4.80 m and the speakers are vibrating in-phase. They are playing identical 134-Hz tones and the speed of sound is 343 m/s. An observer is seated at a position directly facing speaker B in such a way that his line of sight extending to B is perpendicular to the imaginary line between A and B. What is the largest possible distance between speaker B and the observer, such that he observes destructive interference
Answers
Answer:
[tex]X=8.44m[/tex]
Explanation:
From the question we are told that
Distance b/w A&B [tex]x=4.80m[/tex]
Frequency [tex]f=134Hz[/tex]
Sound speed [tex]v=343m/s[/tex]
Generally the equation for wavelength is mathematically given as
[tex]\lambda=v/f[/tex]
[tex]\lambda/2=1/2*v/f[/tex]
[tex]\lambda/2=1/2*\frac{343}{135}[/tex]
[tex]\lambda/2=1.27037037[/tex]
Generally the destructive interference X is mathematically given by
[tex]\sqrt{4.8^2 +X^2} -X=1.27037037\\[/tex]
[tex]23.04+BC^2=X^2+1.613+2.54*X[/tex]
Therefore the destructive interference is
[tex]X=8.44m[/tex]
You are hiking pine mountain and have finally reached the top. You are peering over the edge and accidentally drop your phone while taking pictures. Your phone falls and hit the
ground 13 seconds later. How tall is the mountain?
Answers
Answer:
The cliff is 12.71m tall.
Explanation:
Why?
Before solving the problem, we must remember that the phone was dropped, it means that there is no initial velocity, also, the acceleration acting on the phone is the acceleration due to gravity.
So, to find how tall is the cliff, we can use the following equations:
\begin{gathered}y=y_o+v_o*t-\frac{1}{2}g*t^{2}\\\\v_f=v_o+g*t\end{gathered}y=yo+vo∗t−21g∗t2vf=vo+g∗t
\begin{gathered}t=\frac{v_f}{g} \\\\t=\frac{-15.75\frac{m}{s}}{-9.81\frac{m}{s^{2}}}=1.61s\end{gathered}t=gvft=−9.81s2m−15.75sm=1.61s
Now that we know the time, we can calculate how tall is the cliff:
\begin{gathered}y=y_o+v_o*t+\frac{1}{2}g*t^{2}\\\\y=0+0*1.61s-\frac{1}{2}*(-9.81\frac{m}{s^{2}})*(1.61s)^{2}\\\\y=12.71m\end{gathered}y=yo+vo∗t+21g∗t2y=0+0∗1.61s−21∗(−9.81s2m)∗(1.61s)2y=12.71m
A child throws a ball with an initial speed of at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground and experience negligible air resistance. (a) What is the magnitude of the ball's velocity just before it hits the ground? (b) At what angle below the horizontal does the ball approach the ground?
Answers
Complete Question
A child throws a ball with an initial speed of 8.00 at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground and experience negligible air resistance. (a) What is the magnitude of the ball's velocity just before it hits the ground? (b) At what angle below the horizontal does the ball approach the ground?
Answer:
[tex]v=9.16m/s[/tex]
[tex]\theta=48.1 \textdegree[/tex]
Explanation:
From the question we are told that
Angle of ball [tex]\angle=40 \textdegree[/tex]
Height of ball h=1m
Generally the equation for vertical component is mathematically given by
[tex]v_y=vsin \theta[/tex]
[tex]v_y=8sin 40 \textdegree[/tex]
[tex]v_y=5.14m/s[/tex]
Generally the equation for horizontal component is mathematically given by
[tex]v_x=vcos \theta[/tex]
[tex]v_x=8cos 40 \textdegree[/tex]
[tex]v_x=6.12m/s[/tex]
Generally the equation for vertical displacement of ball is mathematically given by
[tex]y=1+v-yt-\frac{1}{2}gt^2[/tex]
[tex]0=1+5.14t-\frac{1}{2}*9.87*t^2[/tex]
[tex]t=1.22sec[/tex]
[tex]v_yt=v_yt-gt[/tex]
[tex]5.14-(9.8*1.22)=-6.816m/s[/tex]
[tex]v_yt=-6.816m/s[/tex]
Generally the velocity of ball before it hits the ground is mathematically given by
Magnitude
[tex]v=\sqrt{6.12^2 +(-6.816)^2}\\[/tex]
[tex]v=9.16m/s[/tex]
Direction of ball
[tex]\theta=tan^{-1}(\frac{-6.816}{6.12} )[/tex]
[tex]\theta=48.1 \textdegree[/tex] beneath the horizontal
What energy transfer happens in many musical instruments?
Sound to kinetic
Electrical to kinetic
Kinetic to sound
Answers
Answer:
kinetic to sound
Explanation:
this is because energy is moving in the instrument and it produces sound.
Newton's 3rd Law is based on what type of forces?
Answers
Answer: His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.
Explanation:
Explanation:
According to Newton's third law of motion, whenever two objects interact, they exert equal and opposite forces on each other. This is often worded as 'every action has an equal and opposite reaction'.
PLE.ASE HURRY DUE IN 20 MINWhat is the independent variable (the variable that was changed ) in this investigation? How was it measured? Include the units in your answer.
Answer:
What was the dependent variable (the variable that changed because of the independent variable) in this investigation? How was it measured? Include the units in your answer. The variables Car 1 3.64 3.54 3.69 Car 2 3.24 3.47 3.36 Meters Each car traveled 2.5
Answers
Answer:
Do you want the independent or dependent? Independent is the Car and the dependent is the meters traveled.
Explanation:
Answer:
sample answer
In this situation, elevation is dependent on time. So, the dependent variable is elevation in feet.
Explanation:
give two differences between sextusl reproduction and asextual reproduction
Answers
Answer:
Sexual reproduction you need two organisms to reproduce.
Asexual is when you can multiply yourself and there is nothing different about the offspring and the parent.
Why could the beam of particles not have a neutral charge?
Answers
Answer:
The positive and negative charges balance each other. Overall, the atom is uncharged (neutral). However, if something happens to make an atom lose or gain an electron then the atom will no longer be neutral. An atom that gains or loses an electron becomes an ion.
Explanation:
I think this is the answer : D