Answer:
Current =voltage /resistance.
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
Is this right?? Please help me. IT IS SOCIOLOGY!
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
A 15 kg dog sits at the top of a hill. If the dog possesses 600 J of potential energy,
what is the height of the hill?
Answer:
4.08m
Explanation:
h = PE/mg
h = 600/(15)(9.8)
h = 600/147
h = 4.08m
How is it that even light precipitation can still cause the collection of large amounts of water.
Answer:
the heat of the light.
Explanation:
no matter the light, there's always heat being produced from it. and heat makes liuqid rise
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
PLEASE HELP!!!!
An electron is located 4.22 mm away from an isolated proton. If the distance between the two particles is increased to 8.44 mm, what
happens to the electrical potential energy of the electron and why?
O A. The electrical potential energy will increase because work must be done to separate two particles that attract one another.
B. The electrical potential energy will remain the same because the electron and proton are both fundamental particles and their
charge cannot be changed.
O
C. The electrical potential energy will increase because larger energies are associated with greater distances.
O D. The electrical potential energy will decrease because no work is necessary to increase the distance between particles that
demonstrate attraction.
You can download answer here
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If the distance between the two particles is increased to 8.44 mm, the electrical potential energy will increase because work must be done to separate two particles that attract one another. Hence option(A) is correct.
What is potential energy?Potential energy is the energy held by an object as a result of its position relative to other objects, internal stresses, electric charge, or other factors.
The gravitational potential energy of an object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field are all examples of common types of potential energy. The joule, denoted by the symbol J, is the unit of energy in the International System of Units (SI).
The positive and negative charges attract each other, so work must be done to separate two particles. Hence, the electrical potential energy will increase.
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6. Which of the following best describes the situation?
Answer:
D
Explanation:
the man is pull the box that is the force and the box rubbing against the ground causes friction
what is more reactive calcium or strontium?
Answer:
Calcium is less reactive than strontium.
hope it helps
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.
Which is not a step in the scientific method?
a. Problem or question
b. Ask other people for their opinion
O c. Formulate a hypothesis
O d. Arrive At a conclusion
HURRY PLEASE
Answer:
Umm I'm pretty sure is all of the above
why do we use a circuit breaker ?
Answer:to protect an electrical circuit from damage caused by excess current from an overload or short circuit.
Explanation:
QUICK WILL GIVE BRAINLIEST EDG 2021
What is the best prediction for what will happen when all of the hydrogen in the sun has undergone fusion?
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Helium nuclei will split to form hydrogen and the sun will continue to release energy.
Helium nuclei will fuse to create heavier elements but the sun will no longer release energy.
Helium nuclei will fuse to crazy heavier elements and the sun will confuse to release energy.
Answer:
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Explanation:
:)
When all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
What is nuclear fusion?The term nuclear fusion has to do with the combination of two or more nuclei to obtain a larger nuclei with the emission of a tremendous amount of energy.
Hence, when all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
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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.
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is corona the least dense layer in the sun? please fast
Answer:
the Corona is about 10 million times less dense than sun's surface.this low density makesuch less bright than surface of the sun
Answer:
dude the ans no corona,
Explanation:
It cannot survive in space let alone be one of the layer of the sun due to its high temperature ( that is 2million fahrenheit )
Answer quick!!! (Edge 2021)
Haley noticed a small spot on her skin that turned out to be skin cancer. Which treatment is her doctor most likely to use?
A) Brachytherapy
B) Superficial external beam radiation therapy
C) Radiopharmaceuticals
D) High Intensity Focused Ultrasounds
The treatment most likely to use is Superficial External bean Radiation Therapy. Then the correct option is B.
What is the electromagnetic spectrum?The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is a packet of energy that travels and spreads out.
It has radio waves, infrared waves, visible light waves, ultraviolet rays, and microwaves.
They possess high energy even to penetrate deep within the material. the electromagnetic spectrum has a longer wavelength and less frequency.
Haley noticed a small spot on her skin that turned out to be skin cancer.
Surgery, radiation, chemotherapy, and hormone therapy can all be used to relieve signs and symptoms.
Medications may relieve symptoms such as pain and shortness of breath. Palliative treatment can be used.
The treatment most likely to use is Superficial External bean Radiation Therapy.
Then the correct option is B.
Learn more about the electromagnetic spectrum.
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If I was floating in space, why would a scale read my weight as "0"?
Answer:
No external contact force.
Explanation:
Mass is defined as the amount of material an object contains, that doesn't change whether the object it on earth, on the moon or anywhere in space. Except the only force that is acting upon the body in gravity and they don't feel gravitational attraction towards the earth.
Hurry need help ASAP
Answer:
last one
Explanation:
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.
what causes mechanical waves?
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.
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.......
what is the velocity of a 1200 kg boat with a kinetic energy of 160,000 J
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.
What's the net fore and gravity
Answer:
Force = Mass x Acceleration. Since the acceleration of gravity is always constant at 9.81 m/s2, the force of gravity is constant as well, according to Newton. If the object is sitting motionless on the ground, then the net force (sum of all forces) acting on it is zero
Explanation:
sorry if it doesn't help
how to use a circuit breaker
?
Answer:
circuit breakers work in a similar way to fuses, and also protect the circuit from damage if too much current flows but work in a different way. when circuit breakers detect a surge in current in a circuit, they break the circuit by opening a switch. one type of circuit breaker used instead of a fuse and an earth wire is a Residual Current Circuit Breaker (RCCB)
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (77pts)
Answer:
Ex.
1. When we try cycling when we push the padel cycle starts but if we do not push the padels the cycle will stop on one position........
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
The speed of an object in motion will _____ if the net force acting on it is opposite the direction that the object is moving.
Answer:
Decrease
Explanation: