Answers
Answer:
v₂ = -3.42 m/s
Explanation:
Given that,
Mass of an object, m₁ = 3.6 kg
Initial speed of this object is, u₁ = +6.5 m/s (positive for right)
Mass of another object, m₂ = 5 kg
Initial velocity of this object, u₂ = -4 m/s (negative for left)
Fina velocity of object 1, v₁ = 5.7 m/s
We need to find the final velocity of object 2 i.e. 5 kg object.
It is a concept based on the conservation of momentum. Using the conservation of momentum as follows :
\(m_1u_1+m_2u_2=m_1v_1+m_2v_2\)
v₂ is the final velocity of 5 kg object.
Putting all the values to find it.
\(v_2=\dfrac{m_1u_1+m_2u_2-m_1v_1}{m_2}\\\\v_2=\dfrac{3.6(6.5)+5(-4)-3.6(5.7)}{5}\\\\v_2=-3.42\ m/s\)
So, the final velocity of the object 2 is 3.42 m/s and it is towards left.
Related Questions
Which phase describes velocity?
Answers
Answer:
A
Explanation:
A vector quantity is when the unit has magnitude (#) and direction and velocity is speed in a given direction.
You lift a 5 kg object 3 m above the ground.
How much GPE does it have?
How much work was done lifting it?
• How much KE does the object have just before hitting the ground
• if it is dropped?
Answers
(a) The amount of gravitational potential energy possessed by the object at the given height is 147.
(b) The kinetic energy, KE the object have just before hitting the ground is 147 J.
How much GPE does it have?The amount of gravitational potential energy possessed by the object at the given height is calculated as follows;
GPE = mgh
where;
m is the mass of the objectg is acceleration due to gravityh is heightGPE = 5 kg x 9.8 m/s² x 3 m
GPE = 147 J
Based on the law of conservation of energy, the amount of kinetic energy possessed by the object just before hitting the ground will the same as the gravitational potential energy at the initial height.
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What do alcohol, drugs, and tobacco all have in common?
All have some medicinal value.
All are harmful to the body.
All are depressants.
All are stimulants.
Answers
Answer:
all are harmful to the body
The slope of a speed vs.time graph is equal to the object’s
Answers
Answer:
acceleration
Explanation:
speed=v,
In speed vs time graph, slope = dv/dt = acceleration
Roughly speaking, the radius of an atom is about 10,000 times greater than that of its nucleus. If an atom were magnified so that the radius of its nucleus became 2.0 cm, about the size of a marble, what would be the radius of the atom in miles
Answers
Answer:
0.124 miles
Explanation:
Since the radius of the atom R = 10000r where r = radius of nucleus. Now, if r = 2.0 cm = 0.02 m,
R = 10000r
= 10000 × 0.02 m
= 200 m
We know that 1 mile = 1609 m.
So the radius of the atom in miles is R = 200 m × 1 mile/ 1609 m = 0.124 miles
So, the radius of the atom in miles is 0.124 miles
Hi
Please help on question asap if the answer is correct I'll rate you five stars a thanks and maybe even brainliest!
When two light bulbs are connected in series, the resistance in the circuit is increase compared to that with one lightbulb. The increased resistance opposes the flow of current so far fewer electrons pass per second , transferring less energy. The lightbulbs are therefore not as bright as In a circuit with same voltage but only one bulb.
However, when Two lightbulbs are connected in parallel, each loop behaves like a separate circuit . The resistance in each branch is the same as if there were just one light bulb in the whole circuit.there is the same current in each branch of the circuit ,so the bulbs Will light up with the same brightness as a single bulb circuit. The energy stored in the battery will decrease twice as quickly and battery will run out faster than I series circuit.
6) explain the advantages and disadvantages of arranging components in series or parallel.
Answers
Advantages of Components Arranged in Series:
1. Increased resistance: Connecting components in series increases the overall resistance in the circuit. This can be advantageous in situations where you want to limit the flow of current or control the amount of power being dissipated.
2. Voltage sharing: In a series circuit, the total voltage of the power supply is divided among the components. This can be useful when you want to ensure that each component receives a specific voltage.
3. Current consistency: The current remains the same throughout the series circuit, which can be beneficial when you need to ensure a consistent current flow through multiple components.
Disadvantages of Components Arranged in Series:
1. Reduced brightness or performance: As mentioned in the question, when light bulbs are connected in series, the increased resistance reduces the flow of current, resulting in dimmer bulbs or reduced performance in other electrical devices.
2. Single point of failure: If one component in a series circuit fails, it can disrupt the entire circuit and cause all components to stop functioning.
Advantages of Components Arranged in Parallel:
1. Brightness and performance: When components such as light bulbs are connected in parallel, each component receives the full voltage, resulting in brighter bulbs and better performance in other devices.
2. Redundancy: In a parallel circuit, if one component fails, the other components can continue to function independently. This provides redundancy and ensures that the failure of one component does not affect the others.
3. Increased current capacity: Parallel arrangement allows the circuit to handle higher currents, which can be useful in situations where high power or heavy loads are required.
Disadvantages of Components Arranged in Parallel:
1. Increased complexity: Parallel circuits require more wiring and connections, which can make the circuit more complex and harder to manage.
2. Higher cost: Parallel circuits may require more components and wiring, resulting in higher costs for materials and installation.
It's important to consider the specific requirements and constraints of the application when deciding whether to arrange components in series or parallel. Each configuration has its advantages and disadvantages, and the choice depends on factors such as desired current flow, voltage distribution, and reliability.I
write down the value of
920 kg in g
Answers
Answer:
920000
Explanation:
Each kg contains 1,000 grams
A proton has a charge , what gives it a charge?
Answers
Answer:
The charge is believed to be from the charge of the quarks that make up the nucleons (protons and neutrons). A proton is made of two Up quarks, with 2/3 positive charge each and one Down Quark with a negative 1/3 charge (2/3 + 2/3 + -1/3 = 1).
Explanation:
Hope this helps :)
What are the names of two types of alternative energy source that makes use of 'gravity' to produce "free" electricity? *
2 points
wind turbines
nuclear energy
hydroelectricity
solar panels
geothermal energy
tidal power
Answers
The two type of alternative energy sources are tidal power and wind turbines.
Electricity is defined as the flow of charges which can be gotten from various sources that include:
coal, natural gas,oil,andnuclear power.Alternative to energy are those renewable energy sources that can generate electricity. Example are
wind andwaterWind turbines uses wind with the help of gravity to generate electricity. The wind pushes against the blades making them turn which exerts force of gravity into the turbine to generate electricity.
Tidal power uses waves with the help of gravity to generate electricity. Electricity is generated from the gravitational pull of the sun and earth's rotational pulls that causes water waves to occur.
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how is sunlight different from light produced by a light bulb or by a fluorescent light bulb
Answers
A 4,155 kg car moving at 28.3 m/s hits a stationary truck with a mass of 3,172 kg. If the two vehicles become stuck together in the collision, how fast do they move away from the point of impact?
Answers
Answer:
Approximately \(16.0\; {\rm m\cdot s^{-1}}\).
Explanation:
When an object of mass \(m\) travels at a velocity of \(v\), the momentum \(p\) of that object will be \(p = m\, v\).
In this example, the momentum of the car before the collision will be:
\(\begin{aligned}p &= m\, v \\ &= (4155\; {\rm kg})\, (28.3\; {\rm m\cdot s^{-1}}) \\ &\approx 1.17587\times 10^{5}\; {\rm kg \cdot m\cdot s^{-1}} \end{aligned}\).
Since the truck was initially not moving, the initial momentum of the truck will be \((3172\; {\rm kg})\, (0\; {\rm m\cdot s^{-1}}) = 0\; {\rm kg \cdot m\cdot s^{-1}}\).
Momentum is conserved in collisions. In other words, the sum of the momentum of the truck and the car will be the same right before and after the collision.
The sum of the momentum of the truck and the car was approximately \(1.17587\times 10^{5}\; {\rm kg \cdot m\cdot s^{-1}}\) right before the collision. By the conservation of momentum, the sum of the momentum of the two vehicles right after the collision will also be \(1.17587\times 10^{5}\; {\rm kg \cdot m\cdot s^{-1}}\!\).
The velocity of the two vehicles right after the collision will be the same since the vehicles are stuck together. Let \(v\) denote this velocity.
The sum of the mass of the two vehicles is \(m = (4155\; {\rm kg}) + (3172\; {\rm kg}) = 7327\; {\rm kg}\). Divide the total momentum of the two vehicles by their total mass to find the velocity:
\(\begin{aligned}v &= \frac{p}{m} \\ &\approx \frac{1.17587\times 10^{5}\; {\rm kg \cdot m\cdot s^{-1}}}{7327\; {\rm kg}} \\ &\approx 16.0\; {\rm m\cdot s^{-1}}\end{aligned}\).
I need the answer asap everyone have a good day bye
Answers
Im pretty sure its A cuz is closer to the earth.
A particle with mass
m = 3.80 kg
accelerates according to
a = (−3.40i + 1.70j) m/s2.
(a) What is the net force acting on the particle? (Express your answer in vector form.)
(b) What is the magnitude of this force?
Answers
The net force acting on the particle would be and the magnitude of the force would be -12.92i + 6.49j and the magnitude of the force would be 14.46 Newtons.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
The net force on the particle = mass of the particle × acceleration
=3.80*(−3.40i + 1.70j)
= -12.92i + 6.49j
Thus, the magnitude of the net force on the particle would be 14.46 Newtons.
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A student must use an object attached to a string to graphically determine the gravitational field strength near Earth's surface. The student attaches the free end of the string to the ceiling and pulls the object-string system so that the string makes an angle of 5 degrees from the object's vertical hanging position. The student then releases the object from rest and uses a stopwatch to measure the time it takes for the object to make one complete oscillation. Which of the following is the next step that will allow the student to determine the gravitational field strength?
А) Repeat the experiment by adding additional mass to the object for multiple trials
B) Repeat the experiment by changing the length of the string for multiple trials
C) Repeat the experiment by changing the angle that the string makes with the object's vertical hanging position
D) Repeat the experiment by measuring the time it takes to make two oscillations, three oscillations, and additional oscillations for multiple trials
Answers
Answer:
B) True. By changing the length get a different period and with a graph you can find the best value of the gravity pull
Explanation:
The student is reacting a simple pendulum experiment where he can determine the value of the relationship of gravity with the expression
T = 2π \(\sqrt{\frac{L}{g} }\)
let's analyze each statement
A) False. The mass is not a paramer of the period expression
B) True. By changing the length get a different period and with a graph you can find the best value of the gravity pull
C) False. The angle while it is small does not influence the period
D) True. By changing the number of oscillations the period does not change, so you can get the value of the pull of gravity.
We can see that the expressions B and d are true, the most exact value is obtained using procedure B since the graphs allow to reduce the errors
The principle of cross-cutting relationships states that certain features, such as faults, are than the rock layers they cut through. These features are breaks in Earth’s surface where rock has moved sideways, upward, or downward. formations are made of molten rock that has cooled. Those on Earth’s surface are called . Those beneath Earth’s surface are called .
Answers
What is energy?
Question 1 options:
force × distance
force
chemical change
the ability to do work
Answers
Answer:
The ability to do work
Explanation:
Energy can be defined as the ability to do work. We apply energy in basically everything we do in life, energy is needed to walk or move from one position to another, it is required to eat and do other basic things of life. The body system converts the food that is being consumed into energy, this energy can be switched from one form to another.
There are various forms of energy which include solar energy , wind energy, electrical energy, mechanical energy, kinetic energy, potential energy etc. This forms of energy can be converted from one form to anothe but cannot be destroyed.
Answer:
ability to work
Explanation:
a ball hits the wall and reverses courses. According to newtons 3rd law which of these must be true
Answers
The ball exerts a force on the wall, and the wall exerts an equal and opposite force on the ball. So, the correct answer is A.
Newton's 3rd law of motion states that for every action, there is an equal and opposite reaction. The action is the force that the ball exerts on the wall, and the reaction is the force that the wall exerts back on the ball. When the ball hits the wall, it exerts a force on the wall. This force is equal in magnitude but opposite in direction to the force that the wall exerts back on the ball. This is why the ball reverses course. Therefore, option A is correct.
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--The complete Question is, Which of the following statements is true according to Newton's 3rd law when a ball hits a wall and reverses course?
A) The ball exerts a force on the wall, and the wall exerts an equal and opposite force on the ball.
B) The ball exerts a force on the wall, but the wall does not exert a force on the ball.
C) The wall exerts a force on the ball, but the ball does not exert a force on the wall.
D) The ball and the wall do not exert any forces on each other. --
2. 0,25 moles of sodium chloride is dissolved in water to form 100 cm solution. Calculate the concentration of the solution. 3. 20 g of sodium hydroxide is dissolved in 200 cm³ of water. Calculate the concentration of the solution. 4 Calculate the mass of magnesium chloride needed to prepare 100 ml of a standard solution of
Answers
The concentration of the solution will be 0.25M and the concentration of the
sodium Hydroxide is 2.5 M .
What is Stoichiometry ?
A branch of chemistry deals with the application of the laws of definite proportions and of the conservation of mass and energy to chemical activity. The quantitative relationship between constituent in a chemical substance.
We have given here,
Moles of sodium chloride = 0.25moles
Let us assume the the volume of the solution is 1 L.
Molarity = 0.25/
Molarity will be 0.25 M
The mass of sodium Hydroxide is 20g and the molar mass is 40g ,
and the Volume will be 0.2L
Molarity = 20/ 40×0.2
Molarity = 2.5 mol / L
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An airplane is built to withstand a maximum acceleration of 4 g. If its mass is 1,140 kg, what size force would cause this acceleration?
Answers
The size of force that would cause this acceleration is 4560N.
How to calculate force?The force acting on a body can be calculated by multiplying the mass of the body by its acceleration as follows:
Force = mass × acceleration
According to this question, an airplane is built to withstand a maximum acceleration of 4m/s². If its mass is 1,140 kg, the magnitude of the force required is as follows:
Force = 1140kg × 4m/s²
Force = 4560N
Therefore, 4560N is the force acting on the airplane.
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A race car is on a track has a velocity of 200 m/s. 15 seconds later the driver notices that he is going 350 m/s. What is his acceleration?
Answers
Answer:
initial velocity (u) = 200m/s
final velocity (v) = 350 m/s
time (t) = 15s
acceleration (a) = ?
NOW,
a=v-u/t
a= 350-200/15
a= 50/15
a= 3.3333
Explanation:
it's too easy just u need to understand the question . and go according to it's content .
main thing to memorize is it's simple formula.
I HAVE SOLVE THIS QNA. IN VERY
SIMPLE AND UNDERSTANDABLE FORM.
I høpë u hađ uņdērstøöď ťhìs şølutîóñ
:verý ×wəłł.
What are non-examples of inertia?
Answers
Answer:
A TURNING CAR WITH CONSTANT SPEED......NON-EX OF INERTIA
Explanation:
a) It is difficult to extinguish a fire on a crude oil tanker, because each liter of crude oil releases 2.80x107J of energy when burned. To illustrate this difficulty, calculate the number of liters of water that must be expended to absorb the energy released by burning 1.00L of crude oil, if the water has its temperature raised from 20.0C to 100C, it boils, and the resulting steam is raised to 300C.
b) Discuss additional complications caused by the fact that crude oil has a smaller density than water.
Answers
Answer:
Explanation:
Heat released by one litre of oil = 2.8 x 10⁷ J .
Let m gm be the mass of water required .
heat absorbed in increasing the temperature to 100 degree
= mass x specific heat x rise in temp
= m x 4.2 x ( 100 - 20 ) = 336 m
heat required in boiling of all the water
= mass x latent heat of evaporation
= m x 2268 = 2268 m
heat required to raise the temperature of steam from 100 to 300 degree
= mass x specific heat of steam x rise in temp
= m x 2.03 x 200
= 406 m
Total heat absorbed = 3010 m J
So 3010 m J = 2.8 x 10⁷ J
m = 9.30 x 10³ g
density of water = 10³ g per litre
volume of water in litre = 9.3 x 10³ / 10³
= 9.3 litre .
You are driving your car through a roundabout that has a radius of 11 m. Your physics textbook is lying on the seat next to you.
What is the fastest speed at which you can go around the curve without the book sliding? The coefficient of static friction between the book and the seat is 0.40.
Answers
The formula v = sqrt(grs), where v is the speed and g is the radius, can be used to determine the quickest speed at which you can navigate the curve without the book sliding is the acceleration due to gravity, r is the radius of the curve, and μs is the coefficient of static friction.
What distinguishes kinetic friction from static friction??Static friction is the friction that exists between two objects that are not moving relative to each other, while kinetic friction is the friction that exists between two objects that are moving relative to each other. The force of static friction is typically greater than the force of kinetic friction.
How does the coefficient of friction affect the force of friction between two surfaces?The force of friction between two surfaces is directly proportional to the coefficient of friction, with the equation Ff = μFn, where Ff is the force of friction, μ is the coefficient of friction, and Fn is the normal force between the two surfaces. A higher coefficient of friction means a greater force of friction, and vice versa.
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Two identical charges are located 1 m apart and feel a 1 N repulsive electric force. What is the charge of each particle.
Answers
The charge on each particle is 3.3×10⁻⁵ C.
What is charge?Charge is the product of current and time.
To calculate the charge on each particle, we use the formula below.
Formula:
q = √(Fr²/k).............. Equation 1Where:
q = Charge on each particleF = Force of repulsionr = Distance between the chargek = coulomb's constant.From the question,
Given:
F = 1 Nr = 1 mk = 8.99×10⁹ Nm²/C²Substitute these values into equation 1
q = √[(1×1)/(8.99×10⁹)]q = 3.3×10⁻⁵ CHence, the charge on each particle is 3.3×10⁻⁵ C.
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Quantitatively explore the relative size of the electromagnetic and gravitational forcesacting on nucleons.
Answers
Electromagnetic force and gravitational forces are two of the four basic forces
Is the voltage of two identical lamps the same?
Answers
Answer:
It depends if they have the same lightbulb in them.
Explanation:
suppose you do 457 J of work on 1.18 moles of ideal He gas in a perfectly insulated container. by how much does the internal energy change? does it increase or decrease?
Answers
Gas's internal energy has increased as evidenced by the positive change in internal energy per mole of He gas. As a result, the change is positive, and the internal energy of the ideal. The gas rises by around 387 J/mol.
how to calculate internal energy?The system has undergone 457 J of work, which results in a 457 J rise in internal energy. A perfect gas's internal energy is only influenced by its temperature and is proportionate to the moles of the gas. The following formula can be used to determine the change in internal energy per mole of He gas:
U is equal to (457 J) / (1.18 mol) 387 J/mol.
What is the sole determinant of the internal energy of an ideal gas with mass m?As a result, the gas-only has translational kinetic energy, and as a result, the ideal gas' internal energy is solely dependent on temperature.
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In the following description, QUOTE the portion that addresses weather in the area.
Portland, Oregon is located along the coast of the northwestern United States. Several famous volcanoes, including Mount St. Helens and Mount Ranier, are located nearby. Portland normally has rainy, but mild winters. Yesterday, it rained 0.75 inches in Portland.
Answers
Answer:
Portland normally had rainy, but mild winters. Yesterday it rained 0.75 inches in Portland.
Explanation:
This talks about the weather
Astronomers define the __________ as all of space and everything in it. It is enormous, almost beyond imagination. Question 2 options: galaxy none of these universe solar system
Answers
Answer:
Universe
Explanation:
I took the quiz.
Convert 45m/s to mph. Choose the best answer to two significant figures.
101mph
45mph
200mph
24mph
Answers
Explanation:
45 m/s × (3.28 ft/m) × (1 mi / 5280 ft) × (3600 s/h) = 101 mph
This is actually 3 significant figures. To write in 2 significant figures, you must use scientific notation:
1.0×10² mph