Answer:
v_f = 10.85 m/s
Explanation:
We will apply the law of conservation of momentum here:
[tex]m_{1}v_{1i} + m_{2}v_{2i} = m_{1}v_{1f}+m_{2}v_{2f}\\[/tex]
where,
m₁ = mass of roller skater = 47 kg
m₂ = mass of bag = 6 kg
v_1i = initial speed of roller skater = 12 m/s
v_2i = initial speed of the bag = 0 m/s
v_1f = final speed of the roller skater = ?
v_2f = final speed of the bag = ?
Both the bag and the skater will have same speed at the end because kater is carrying the bag:
v_1f = v_2f = v_f
Therefore, the equation will become:
[tex](47\ kg)(12\ m/s)+(6\ kg)(0\ m/s)=(47\ kg)(v_{f})+(5\ kg)(v_{f})\\564\ N.s = (47\ kg+5\ kg)(v_{f})\\v_{f} = \frac{564\ N.s}{52\ kg}\\[/tex]
v_f = 10.85 m/s
Can someone pls help me with this?
Answer:
17 - length of the fork
18 - number of turns
19 - material of the fork
Explanation:
it's a quarter and a half basically an amount of it it's actually the measurement of your actually doing and the size and the programs and you should basically do the l up and the l down just another kid information from it so this is what it goes from
High energy waves have what
Answer:
It means that the frequency will be a lot higher with a shorter wave.
Which of the following elements is NOT considered a halogen?
-Bromine (Br)
-Chlorine (Cl)
-Fluorine (F)
-Argon (Ar)
Answer:
Argon
Explanation:
Halogens are elements within group 17 on the periodic table. As argon is in group 18, which means it is a noble gas. Bromine, chorine, and flourine are all in group 17, making them halogens.
In a head on collision, if you aren’t wearing your seatbelt you could go through the window. What Law is being applied?
Answer:
inertia
..............
Answer:law of inertia
Explanation:
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
Answer:
Ok
Explanation:
Speed
A 40 kg shell is flying at a speed of 72 km/h. It explodes into two
pieces and one piece with a mass of 15 kg stops. The velocity of the
other piece will be 32 m/s.
true or false?
Answer: This is true
Explanation: v2=800/25= 32m/s
what is the velocity of a 1200 kg boat with a kinetic energy of 160,000 J
Hurry need help ASAP
Answer:
last one
Explanation:
What is the cause of the falling surface temperatures of the Pacific Ocean?
Answer:
The primary cause of rising SST levels worldwide is climate warming due to excessive amounts of greenhouse gases being released into the atmosphere. Heat from the warming atmosphere raises the temperature of the sea surface. ... Water expands as it warms and the increased volume causes sea level rise.
Explanation:
I think so, sorry if wrong
An unknown element has 5 protons, 5 electrons, and 6 neutrons what is the atomic mass of this element
Answer:
Atomic mass 5
Explanation:
No. protons=Atomic mass
1. What is the kinetic energy of a 94 kg basketball player running at 7.3 m/s?
2. What is the velocity of a truck that has a mass of 2288 kg and 432,000 J of kinetic energy?
what causes mechanical waves?
Which object has the most thermal energy?
A. A 10 kg rock at 10°C
B. A 6 kg rock at 15°C
C. A 10 kg rock at 15°C
D. A 6 kg rock at 10°C
Answer:
10 kg rock at 15 degrees
Explanation:
did test
2. A hammer hits a nail with a force of 50 N into some wood. The area of the point of the nail is 0.02 cm2. What is the pressure the nail puts on the wood?
What is the pressure the nail puts on the wood?
Answer:
hmmdndbdjjdjdhdjejjejdjdhdudududjhdhdhdhd
I hope this helps.......
The smallest bird is the Cuban bee hummingbird, which has a mass of only 1.7 g. If this bird did 8.8 10 –4J of work by exerting an upward force of 3.4 10 –4 N, how far did it fly?
Answer:
The distance the bird flew is approximately 2.59 meters
Explanation:
We list out the parameters in the question, and the required measurement as follows;
The mass of the Cuban bee hummingbird, m = 1.7 g = 0.0017 kg
The amount of work the bird does, W = 8.8 × 10⁻⁴ J
The amount of upward force the bird exerts, F = 3.4 × 10⁻⁴ N
Let 'd' represent the distance flown by the bird
(The downward force, [tex]F_g[/tex] = The weight of the bird, W
W = The mass of the bird, m × The acceleration due to gravity, g
The acceleration due to gravity, g ≈ 9.81 × 10 m/s²
∴ [tex]F_g[/tex] ≈ 0.0017 kg × 9.81 m/s² = 0.016677 N > F)
Given that the weight of the bird is larger than 'F', we assume that the force exerted by the bird is the net force, [tex]F_{NET}[/tex] = F
Therefore;
Work done, W = Net Force, [tex]F_{NET}[/tex] × Distance, d
∴ W = [tex]F_{NET}[/tex] × d
d = W/[tex]F_{NET}[/tex] = 8.8 × 10⁻⁴ J/(3.4 × 10⁻⁴ N) = 2.58823529 meters
The distance the bird flew, d ≈ 2.59 m.
Which statement about the carbon cycle is most true?
A. Energy is destroyed when organic matter decays.
B. The total mass of carbon on Earth is always increasing.
C. Carbon is lost from the cycle when it enters the atmosphere.
D. Carbon changes form, but the total amount on Earth remains the same
study the symbol below .draw it your answer sheet and then the question that follow.
1.what does the symbol suggest?Explain.
2.which 3R`s should be done first and the most often:Reduce and Reuse or Recycle?which follows next and which should be done last
Answer:
Part A
Please find attached the required drawing created with Microsoft Visio
Part B
1. The symbol (from a similar question) suggest the steps used to conserve resources
2. i) Reduce
ii) Reuse
iii) Recycle
Explanation:
1. The symbol suggests that in order to maintain sustainable use of our natural resources we can conserve them reducing waste, making use of reusable products, and recycling items to produce new items
2. i) The conservation step to be done first in the 3R's is Reduce
The natural resources can be conserved by reducing the amount of waste produced and also reducing the usage of non renewable natural resourced
ii) The next conservation step is to follow after it is no longer possible to reduce wastage is Reuse
There are several items that can be made use of for other purpose after they have been used including, water, bags for shopping, reusable nose masks
iii) The item which should be done last is Recycle
To recycle is to process used materials to create other items which can then be used as new items
Examples include;
Iron, Plastics, glass, paper, tires, and electronics
An object has a velocity of 9 m's and a mass of 20 kg. What is the kinetic energy of the object? A 90 J C. 810 J B 180 J D. 1,620 )
Answer:
K=1/2mv^2=(20x81)/2=810J
A roller skater of 47kg moving with a velocity of 12 m/s to the east picks up a bag of 6.0 kg. What is the final velocity of the person traveling with the basket? show your work HINT: Use the law of conservation of momentum in the perfectly inelastic collision m1v1i + m2v2i = (m1+m2) vf
plz guys i have exam now answer her quikly
Answer:
v_f = 10.85 m/s
Explanation:
We will apply the law of conservation of momentum here:
[tex]m_{1}v_{1i} + m_{2}v_{2i} = m_{1}v_{1f}+m_{2}v_{2f}\\[/tex]
where,
m₁ = mass of roller skater = 47 kg
m₂ = mass of bag = 6 kg
v_1i = initial speed of roller skater = 12 m/s
v_2i = initial speed of the bag = 0 m/s
v_1f = final speed of the roller skater = ?
v_2f = final speed of the bag = ?
Both the bag and the skater will have same speed at the end because kater is carrying the bag:
v_1f = v_2f = v_f
Therefore, the equation will become:
[tex](47\ kg)(12\ m/s)+(6\ kg)(0\ m/s)=(47\ kg)(v_{f})+(5\ kg)(v_{f})\\564\ N.s = (47\ kg+5\ kg)(v_{f})\\v_{f} = \frac{564\ N.s}{52\ kg}\\[/tex]
v_f = 10.85 m/s
What is the magnitude and direction (right or left) of the
net force acting on the box?
______ N to the _______
Answer:
12 N to the Right
Explanation:
12 N is the answer for the first box and right is the answer for the second box
Help greatly appreciated.
Use the links to answer the question.(I mean, you don't HAVE to if you prefer not to if you have already found the answer or would prefer to look it up yourself).
#1: http://www.seasky.org/space-exploration/astronomers-isaac-newton.html
#2: https://www.space.com/newtons-laws-of-motion-explained.html
#3: https://www.universetoday.com/91785/isaac-newton/
Write a short 6 sentence summary answering this: How did Newton alter the Solar System model proposed by Kepler and what other contributions did he make to Astronomy?
Thank you all for helping me! you saved my grade by a lot!
Answer:
If Kepler’s laws define the motion of the planets, Newton’s laws define motion. Thinking on Kepler’s laws, Newton realized that all motion, whether it was the orbit of the Moon around the Earth or an apple falling from a tree, followed the same basic principles. “To the same natural effects,” he wrote, “we must, as far as possible, assign the same causes.” Previous Aristotelian thinking, physicist Stephen Hawking has written, assigned different causes to different types of motion. By unifying all motion, Newton shifted the scientific perspective to a search for large, unifying patterns in nature. Newton outlined his laws in Philosophiae Naturalis Principia Mathematica (“Mathematical Principles of Natural Philosophy,”) published in 1687.
Law I. Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed theron.
In essence, a moving object won’t change speed or direction, nor will a still object start moving, unless some outside force acts on it. The law is regularly summed up in one word: inertia.
Law II. The alteration of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.
Newton’s second law is most recognizable in its mathematical form, the iconic equation: F=ma. The strength of the force (F) is defined by how much it changes the motion (acceleration, a) of an object with some mass (m).
Law III. To every action there is always opposed an equal reaction: or the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.
As Newton himself described: “If you press a stone with your finger, the finger is also pressed by the stone.”
Explanation:
Hope this helps I cant say what I wrote is 100% correct so use at your own risk.
why is the sun considered as the prime source of heat energy ?
Answer:
The Sun is the Ultimate Source of Energy. Every morning the sun rises, bringing light and heat to the earth, and every evening it sets. ... Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.
Using the diagram below, identify the correct chemical formula for the molecule shown.
Answer:
is the firts one because i due it in jannuary i will know all answer
Explanation:
A ball is thrown at 60 degrees and lands in 18.5 seconds what is the velocity of the ball at the start
Answer:
the initial velocity of the ball is 104.67 m/s.
Explanation:
Given;
angle of projection, θ = 60⁰
time of flight, T = 18.5 s
let the initial velocity of the ball, = u
The time of flight is given as;
[tex]T = \frac{2u\times sin(\theta)}{g} \\\\2u\times sin(\theta) = Tg\\\\u = \frac{Tg}{2\times sin(\theta)} \\\\u = \frac{18.5 \times 9.8}{2\times sin(60^0)} \\\\u = 104.67 \ m/s[/tex]
Therefore, the initial velocity of the ball is 104.67 m/s.
1. What is a cast? How is a cast formed?
Answer:
a cast is something that holds a item in place weather it be a iron sword or a broken arm. a cast is made by hollowing out the inside and placing your item in it.
Explanation:
How does a parallel circuit change when a branch is added? The total resistance increases, so the current in the circuit decreases. The total resistance decreases, so the current in the circuit increases. The total resistance increases, so bulbs shine at a lower brightness. The total resistance decreases, so bulbs shine at a higher brightness.
Answer:
i know i'm way late. i'm so sorry but the answer is b not c. i just took the test and got 90% this one is wrong. it's B
Explanation:
just took the test.
hope this helps!
have a good day/ night
When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.
What is meant by a parallel circuit ?A parallel circuit is defined as the type of circuit in which the resistors are connected in parallel such that the current flowing through each of them is different.
Here,
The given circuit is connected in parallel combination of resistors. The current has different pathways to flow through. The voltage applied across each resistors will be the same.
Consider a parallel resistance circuit having a combination of n number of resistors with resistance R. The effective resistance of the parallel circuit can be given as,
1/Reff = 1/R₁ + 1/R₂ + 1/R₃ +....1/Rₙ
Since, the resistance is same on all resistors, we can write,
Reff = R/n
So, when adding a branch, the number of resistors, n increases. As a result, the effective resistance of the circuit decreases.
According to Ohm's law, as the resistance of a circuit decreases, the flow of current through the circuit increases.
Hence,
When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.
To learn more about parallel circuit, click:
https://brainly.com/question/4069479
#SPJ7
Which parts of the electric circuit considered as fuse
Answer:
Rewirable or Kit – Kat Type Fuses are a type of Low Voltage (LV) Fuses. They are most commonly used in house wiring, small industries and other small current applications. Rewirable Fuses consists of two main parts: a Fuse Base, which contains the in and out terminal, and a Fuse Carrier, which holds the Fuse Element.
https://youtu.be/f_kgUUaMZlw
A bus as speed of 20m/s begin to slow at constant acceleration of 8.00m/s2 along a straight line find the average speed for the 5al.S interval
Answer:
the final velocity of the bus is -20 m/s.
Explanation:
Given;
initial velocity of the bus, u = 20 m/s
deceleration of the bus, -a = 8 m/s²
time of motion, t = 5 s
The final velocity of the bus is calculated as;
v = u + at
v = 20 + (-8 x 5)
v = 20 - 40
v = -20 m/s.
Therefore, the final velocity of the bus is -20 m/s.
Apart from physical factors, what other environmental factors are in your environment?
Answer:
Explanation:
Factors which affects and impacts our environment may include water, sunlight, buildings and so many other. The factors which can touched are called the physical factors. The physical factirs include buildings, humans and so on. Other factirs which aren't physical inckide the the effects posed to the environment t by biological and chemical factirs which may include, the impacts in sunlight and Rainfall, the pH and so on.
Is this right?? Please help me. IT IS SOCIOLOGY!