after the Collision the two cars stick together find the initial velocity of the car on the right hand side
Answers
This is because of conservation of linear momentum.
Related Questions
You pull a sled with a package on it across a snow-covered flat lawn. If you
apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. What is the
combined mass of the package and the sled? (Assume there is no friction.)
Answers
Answer:52.5
Explanation:
You pull a sled with a package on it across a snow-covered flat lawn. If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg
The given data to find Mass,
The force applied to the sled, F = 65.1 N
Acceleration of the sled, a = 1.24 m/s²
What is force?Forces are defined by both strength and direction.
Force is a vector quantity. It is a quantity that is described by Magnitude and Direction. The strength of a force is its magnitude and the direction, well it is the direction the magnitude is applied on the object.
We need to find the combined mass of the package and the sled. Let it is m. Using definition of force as follows :
F = ma
m = F/a
m = 65.1 /1.24
Mass, m = 52.5 Kg.
If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg
Hence, Option C is the correct answer.
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Ruth throws a baseball straight up at 22 m/s. What is the ball's velocity after 1.4 seconds?
Answers
Answer: v = 43.98 m/s
Explanation: 22 + 15.7x1.4 = 43.98.
Hope this helps!
Debby and Ben took different routes to travel from Point A to Point E. Debby took the
route along A, B, C, D, and E. Ben took the route along A, G, F, and E. Debby and Ben
both took 4 hours to complete their walk. Their routes are shown.
Route in miles
D2 E
End
B2C
li
F
2
LL
3
10
Start
G
A
Which statement is true about Debby and Ben's average speed?
Debby's average speed was twice Ben's average speed,
Ben and Debby's average speed was the same,
Debby's average speed was three times Ben's average speed,
Ben's average speed was twice Debby's average speed.
Answers
A car traveling at 40 m/s accelerates to 57 m/s in 2.5 seconds. What is the acceleration of the car?
Answers
Answer:
6.8ms²
Explanation:
a=v-u/t
a=57-40/2.5
a=17/2.5
a=6.8ms²
Plz help i need help on my homework
Answers
A charged cell phone has chemical energy stored in its battery. As you use your phone, the amount of chemical energy in the battery decreases. Why is this not a violation of the first law of thermodynamics?
Answers
Answer:
Because the chemical energy is converted to electrical enegy in the cell phone
Explanation:
This set up is not a voilation of the first law of thermodynamics because the chemical energy is not lost, it is only being transformed into electrical energy.
According to the first law of thermodynamics "energy is neither created nor destroyed but transformed from one form to another".
In a charged cell phone, the chemical energy is being transformed to electrical energy as you use it. A phone cannot directly be powered with chemical energy. The energy transformation to electrical energy makes it possible to use the phone. In this process no energy is lost nor created. But simply, energy is transformed.It does not violate the first law of thermodynamics as the energy is being converted from one form to another.
Conversion of energy:As we use our phones, the amount of chemical energy in the battery decreases. But it is not a violation of the first law of thermodynamics.
It may seem like the first law of thermodynamics is being violated here as the chemical energy of the cell is decreasing but that's not the case.It is because the chemical energy in the battery is being converted into electrical energy.There is no energy being created or lost here. It is a simple conversion of energy from one form to another.The conservation of energy is being followed as the loss of chemical energy is equal to the gain in electrical energy of the system.Learn more about energy conversion:
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This athlete loads a sled to a combined mass of 90.0 kg, and drags the sled with a force of 258 N at an angle of 15.0° across a surface with a coefficient of kinetic friction of 0.250. What is the approximate acceleration of the sled?
Group of answer choices
Answers
Answer:
The approximate acceleration of the sled is 0.319 m/s²
Explanation:
Given;
mass of the sled, m = 90 kg
horizontal applied force, f = 258 N
angle of inclination of the force, θ = 15°
coefficient of kinetic friction of 0.250, μ = 0.25
The net vertical force on the sled is given by;
Fcosθ - μmg = ma
258Cos15 - (0.25 x 90 x 9.8) = ma
249.2 - 220.5 = ma
28.7 = ma
a = 28.7 /m
a = 28.7 / 90
a = 0.319 m/s²
Therefore, the approximate acceleration of the sled is 0.319 m/s²
Explain the meaning of the name "black hole". This should be 2-3 sentences. Hint- relate this to density and how it effects things. *
Answers
A decomposition ________ occurs when a substance is broken down into two or more simpler substances in a chemical reaction.
(APEX)
need the answer as fast as possible
Answers
Answer:
Element is the answer ok
2. Rusting is an
example of a
a. physical property.
b. physical change.
C. chemical property.
d. chemical change.
Answers
Answer:
rusting is a chemical property because it is irreversible it changes the identity of a substance
Answer:
C. chemical property
Explanation:
a chemical property of iron is that it is capable of combining with oxygen to form iron oxide，the chemical name of rust
How did the motion of the ball change when John kicked it?
A
The ball continued moving in the same direction and its speed increased.
B
The ball continued moving in the same direction and its speed decreased.
C
The ball changed directions and its speed increased.
D
The ball came to a complete stop.
Answers
Answer:
The ball continued moving in the same direction and its speed increased.
When John kicked the ball, this was an example of motion. The ball's force increased because the ball got force from John's leg. So, the answer is option A.
Hope this helps you!
Energy must be measured in
Answers
Answer:
joule
Explanation:
hop it helps give a good rate ples
Answer:
joule
Explanation:
Why is circular motion at constant speed not a natural state of motion?
Answers
The reason behind circular motion at constant speed is not a natural state of motion is centripetal acceleration acting on it.
What is centripetal acceleration?
Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.
A natural state of motion is that motion where object moves with constant velocity and no acceleration. As in circular motion of an object at constant speed, a constant centripetal acceleration remains, this is not a natural state of motion.
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Force is defined as
Change in momentum b)rate of change of momentum
c)The quantity that opposes inertia d)The quantity that keeps the velocity constant
Answers
Answer:
c) the quantity that opposes inertia
3. What is the instantaneous speed of a car after 3 seconds that is traveling at 30 m/s and accelerates at a constant
rate of 10m/s??
Answers
One mole of copper at a uniform temperature of 0° C is placed in thermal contact with a second mole of copper which, initially, is at a uniform temperature of 100° C. Calculate the temperature of the 2-mole system, which is contained in an adiabatic enclosure, when thermal equilibrium is attained. Why is the common uniform temperature not exactly 50° C? How much thermal energy is transferred, and how much entropy is produced by the transfer? The constantpressure molar heat capacity of solid copper varies with temperature as cp = 22.64 + 6.28×10−3T J/mole K
Answers
Answer:
1) T ≈ 50.318°C
2) It is due to the variation of the molar heat capacity of solid copper with temperature
3) The entropy introduced in the one mole of copper at 0°C is 4.146 J/K
The entropy introduced in the second mole of copper at 100°C is -3.548 J/K.
Explanation:
1) The given parameters are;
The temperature of 1 mole of copper = 0°C
The temperature of the second mole of copper 100°C
The specific heat capacity of copper = 22.64 + 6.28 × 10⁻³·T J/(mole·K)
The heat gained by the copper at 0° = The heat lost by the one mole of copper at 100°C
The total heat gained and lost is given as follows;
[tex]\int\limits^{T_f}_{273} {c_p} \, dT= -\int\limits^{T_f}_{373} {c_p} \, dT[/tex]
[tex]\int\limits^{T_f}_{273} {22.64 + 6.28 \times 10^{-3}\cdot T} \, dT= -\int\limits^{T_f}_{373} {22.64 + 6.28 \times 10^{-3}\cdot T} \, dT[/tex]
22.64·([tex]T_f[/tex] - 273) + (6.28 × 10⁻³)/2×([tex]T^2_f[/tex] - 273²) = - 22.64·([tex]T_f[/tex] - 373) - (6.28 × 10⁻³)/2×([tex]T^2_f[/tex] - 373²)
Which gives;
0.00314 × [tex]T^2_f[/tex] + 22.64 × [tex]T_f[/tex] - 6414.74 = -0.00314 × [tex]T^2_f[/tex] - 22.64 × [tex]T_f[/tex] + 8881.59
Transferring the right hand side of the equation to the left and collecting the like terms gives approximately;
0.00628× [tex]T^2_f[/tex] + 45.28 × [tex]T_f[/tex] - 15296.33 = 0
Factoring with a graphing calculator, gives;
(T + 7533.509)·(T - 323.318)×0.00628 = 0
∴ T = 323.318 K ≈ 50.318°C
2) The common uniform temperature is not exactly 50°C because the hotter second mole of copper had a higher specific heat capacity, which resulted in the temperature at equilibrium being slightly higher than the average temperature
3) The amount of thermal energy transferred is given as follows;
22.64·(323.318 - 273) + (6.28 × 10⁻³)/2×(323.318² - 273²) ≈ 1233.42 J
4) For the mole at 0°C, we have;
[tex]\Delta S_1 = \dfrac{\Delta Q}{T} =\int\limits^{323.318}_{273} { \left (\dfrac{22.64}{T} + 6.28 \times 10^{-3} \right)} \, dT\\\\\\\Delta S_1 = 22.64 \times ln \left ( \dfrac{323.318}{273} \right ) + 6.28 \times 10^{-3} \times (323.218 - 273) = 4.146 \ J/K[/tex]
The entropy introduced in the one mole of copper at 0°C, ΔS₁ = 4.146 J/K
For the mole at 100°C, we have;
[tex]\Delta S_2 = \dfrac{\Delta Q}{T} =\int\limits^{323.318}_{373} { \left (\dfrac{22.64}{T} + 6.28 \times 10^{-3} \right)} \, dT\\\\\\\Delta S_2 = 22.64 \times ln \left ( \dfrac{323.318}{373} \right ) + 6.28 \times 10^{-3} \times (323.218 - 373) = -3.548 \ J/K[/tex]
The entropy introduced in the second mole of copper at 100°C, ΔS₂ = -3.548 J/K.
The variable that you/I the researcher get to choose.
Independent Variable
Dependent Variable
Experimental
Control
Answers
Answer:
Independant Variable
-A pool ball leaves a 0.70 meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground.
-A rock is thrown with a velocity of 23.7 m/s horizontally off the top of a bridge and lands in the water 35.0 meters away. What is the vertical velocity just before the rock hits the water below?
-A plane moving at a velocity of 205 m/s drops a piece of cargo which lands 6.5 seconds later. How far did the cargo box land after it's release?
Answers
Answer:
0.70+2.4=23.7+35.0=answer
Explanation:
Answer:
First Question:
If the initial velocity is horizontal: It doesn't really matter how fast it is going horizontally if we want to calculate time.
Since it rolled off the table, the initial vertical velocity is 0. The displacement will be -0.7 meters since the table is 0.7 meters high. The acceleration will be -9.8 m/s^2 because that's just earth's gravity.
We can plug the variables into the formula Displacement = Initial Velocity*Time + 1/2*Acceleration*Time^2:
[tex]-0.7 = 0\cdot t + 1/2\cdot-9.8\cdot t^2\\-0.7 = -4.9*t^2\\t^2 = \frac{10}{7} \\t = \sqrt{\frac{10}{7}}[/tex]
Rounded to the nearest hundredths, the answer is 1.2 seconds.
Second Question:
We can use the horizontal variables to find out the time to solve for the vertical velocity.
The acceleration is going to be 0(assuming no air resistance), the initial velocity is going to be 23.7 m/s, and the displacement is going to be 35.0 meters.
Again, we can plug the variables into the formula Displacement = Initial Velocity*Time + 1/2*Acceleration*Time^2:
[tex]35 = 23.7\cdot t + 1/2\cdot 0\cdot t^2\\35 = 23.7\cdot t\\t = \frac{35}{23.7}[/tex]
Rounded to the nearest hundredth, t = 1.48.
Now, we're going to find the vertical variables:
The acceleration will be -9.8 m/s^2 because that's just earth's gravity. The initial velocity will be 0 because the rock was launched horizontally. The time, as calculated before, is 1.48.
Now, we can plug t into the formula Velocity = Initial Velocity + Acceleration *Time:
[tex]v = 0 + -9.8\cdot1.48\\v = -14.504[/tex]
Rounded to the nearest hundredth, the answer is -14.5 meters per second.
Third Question:
Let's find the horizontal variables:
Assuming no air resistance, the final velocity is 205 m/s. The initial velocity will also be 205 m/s. The time will be 6.5 seconds.
We can use the formula Displacement = (Final Velocity+Initial Velocity)/2 * Time. In this case, the final velocity and the initial velocity are the same, so the formula reduces to Displacement = Final Velocity * Time:
[tex]d = 205\cdot6.5\\d = 1332.5[/tex]
Therefore, the answer is 1332 meters.
I really hoped this helped you because I spent more than 1 hour explaining. If you have more questions don't hesitate to ask. If it helped you, please consider giving me brainliest? :)
define heat...and angle of friction?
Answers
Explanation:
Heat is the form of energy that is transferred between systems or objects with different temperatures.....
Angle of friction : The angle which the resultant of force of limiting friction F and normal reaction R makes with direction of normal reaction R is called angle of friction...
physics the angle of a plane to the horizontal when a body placed on the plane will just start to slide. The tangent of the angle of friction is the coefficient of static friction.
Anyone get this please help me step by step
Answers
Explanation:
Okayyy.. So..
12 pounds = 26.00
1 pound=2.17
Now you have to use cross multiplication method
[tex]1 = 2.17 \\ = 18.00[/tex]
The answer is 8.3
If I'm not mistaken
Joe runs 30 meters in 5 seconds. He then rests for 15 seconds. Joe runs another 20 meters in 5 seconds. What is joes average speed
Answers
Answer:
His average speed is through 4-6.
Explanation:
Because if you divide them both by 5 you get 4 and 6.
As the spaceship travels upward in the sky, some of its kinetic energy will be lost to the universe due to ?
a) Friction
b) Chemical Potential Energy
c) Temperatures decreasing as altitude increases
Answers
Answer:
Friction !!!
Explanation:
How much clothes should be applied on 100 cm² area using pressure of 25 Pa
Answers
Answer:
hi !
Pressure = Force/Area
Force = Pressure*Area
Pressure = 25 Pa
Area = 100 cm² = 0.01 m²
F = 25*0.01
= 0.25 N
Explanation:
the efficiency of transformer is not 100%why?
Answers
Answer:
Hysteresis, Eddy current, flux leakage and resistance of winding are those four reasons. It is impossible to overcome this four reasons, Hence transformer never be 100% efficient.
If an object starts at rest, what is necessary to make it start moving?
Answers
It will need a force acceleration
How do stars serve as evidence for the expansion of the universe and the Big Bang theory?
Answers
Answer:
The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
Convert 6.6 meters to centimeters
Answers
Answer:
6.6 Meters = 660 Meters
Explanation:
1 Meter = 100 Centimeters
The part of a longitudinal wave where the particles are spread apart is called a______?
Answers
Answer:
Rarefaction (I think so..)
The part of a longitudinal wave where the particles are spread apart is called a rarefactions.
What is longitudinal wave?Longitudinal waves are waves in which the displacement of the medium is in the same (or the opposite) direction as the wave propagation and the medium vibration is parallel ("along") to the direction the wave travels.
Because they create compression and rarefaction when passing through a material, mechanical longitudinal waves are also known as compressional or compression waves. They are also known as pressure waves because they cause pressure changes.
The part of a longitudinal wave where the particles are spread apart is called a rarefactions and the part of a longitudinal wave where the particles are closed together is called a compression.
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if you put something like apiece of cardboard between a magnet and a iron nail, the magnet still holds the nail. how?
Answers
The mass of a solid cube is 1370 g, and each
edge has a length of 5.18 cm.
Find the density of the cube.
Answer in units of kg/m3
Answers
Answer:
D=m/v
Explanation:
1.37kg/1.3899m cube
0.9927kg meter cube