Answer:
2.66 m/s to the right
Explanation:
Applying,
The Law of conservation of momentum,
For elastic collision,
mu+m'u' = mv+m'v'................. Equation 1
Where m = mass of Car A, m' = mass of car B, u = initial velocity of car A, u' = Initial velocity of car B, v = Final velocity of car A, v' = Final velocity of car B
make v the subject of the equation
v = (mu+m'u'-m'v')/m.................. Euqation 2
Note: Assuming Left direction is positive and right direction is negative.
Given: m = 67.3 kg, m' = 65.2 kg, u = 5.65 m/s, u' = -3.2 m/s, v' = 5.38 m/s
Substitute these values into equation 2
v = [(67.3×5.65)+(65.2×[-3.2])-(65.2×5.38)]/67.3
v = (380.245-208.64-350.776)/67.3
v = -179.17/67.3
v = -2.66
Hence v = 2.66 m/s to the right
If the time between the horn sounding and the people on the ship hearing the echo from the ship is 4 seconds, how far away is the ship from the cliff ? (velocity of sound in air is 331 m/s)
Question options:
A. 1324 m
B. 662 m
C. 0.012 m
D. 820 m
Answer:
D
Explanation:
A force is acting on a 3-kg object during 5 seconds. If the object initially has a speed of 1.5m/s and after applying the force its speed is 4 m/s
Answer:
1.5 N
Explanation:
You've left us to guess what the question is. I will Assume it is what's the force?
Givens
m = 3 kg
vi = 1.5 m/s
vf = 4 m/s
t = 5 seconds
Formula
F = m * (vf - vi)/t
Solution
F = 3 * (4 - 1.5) / 5
F = 1.5 N
A germanium piece is heated, then its resistance increases or decreases
Answer:
decreases
Explanation:
Which option is an example of chemical energy being transformed into
kinetic energy?
A. A ball rolling down a hill
B. A battery powering a flashlight
C. A plant storing energy from the Sun in its leaves
O D. A rocket engine igniting its fuel during liftoff
SUBMIT
Answer: D
Rocket engine igniting is chemical energy when he in turn makes it launch and move which is kinetic energy
Which action would not speed up erosion in a Texas ecosystem?
A
High winds
B
Flash flooding
C
Acid rain
D
Large waves
If you good with science multiple choice
Answer:
If it had more or less mass, the atmosphere would be very different with either too much ammonia and methane or too little oxygen and water
Explanation:
Which is one property of silt soils?
Answer:
silt helps grow plants
Explanation:
it has more organic matter in it and it retains just enough water to grow
A canister is approaching a 78.4 kg astronaut at 3.5 m/s in an airless spacecraft. She pushes against it, which slows it down to 1.2 m/s (but does not reverse it) and gives her a speed
of 2.4 m/s. What is the mass of this canister?
76.3 kg
55.6 kg
81.8 kg
90.0 kg
Answer:
76.3 kgExplanation:
this is my week answerWhen matter changes shape, does its mass change?
Answer:
No, the mass of an object is always the same, even if a chemical reaction happens or the object becomes denser.
Explanation:
HOW DOES A GRAPH HELP YOU SEE ANOMALOUS DATA?
Answer:
Anomalies consist of one or more modifications, insertions or deletions. As was described in Section 3.1, there are only three types of changes that can be made to a graph. Therefore, anomalies that consist of structural changes to a graph must consist of one of these types. Assumption 4.
Explanation:
If you wanted to learn more about ancient scientific knowledge, whose life
would you research?
O A. Ibn al-Haytham's
B. Christian Doppler's
O C. Sir Isaac Newton's
D. Galileo Galilei's
Answer:
You would want search A.Ibn al-Haytham's
Which of the following regions of the electromagnetic spectrum has the highest energy
(among the 4 listed here)?
A. Visible light
B. Radio waves
C. Infared light
D. UV light
The maximum energy is found in visible light from the following areas of the electromagnetic spectrum. Option A is correct.
What is the electromagnetic spectrum?The electromagnetic spectrum is seen as colors violet, indigo, blue, green, yellow, orange, and red. Blue light has a very short wavelength, and so produces a higher amount of energy.
Blue light in the visible zone has a very short wavelength. So that it produces a higher amount of energy that's why the blue part of visible light transfers the most energy.
Visible light from the following regions of the electromagnetic spectrum has the highest energy.
Hence, option A is correct.
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factorise by the cross method
3g^2 - 4g +1
plz answer
the question is in math by mistake i click physics i edit it
Answer:
{g}^{2}g2
Explanation:
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʙᴀʙᴇ
Explain why the temperature varies with distance from the Sun in this way?
Answer:
The average surface temperature decreases the further you get from the Sun because the more distant planets receive less energy/heat/sunlight per square meter of their surface. This is because the energy from the Sun spreads out (becomes less concentrated) as you travel further from the source/Sun.
Explanation:
I am having trouble with writing a 2 paragraph summary about this vidio can someone help me
(this si the vidio )Picture of the Big Bang (a.k.a. Oldest Light in the Universe)
Answer:
hmmm ok
Explanation:
All the sources of energy present on the earth are the outcomes of solar energy .Justify this statement with example
Answer:
because all the energy is directly depend on solar .. like light energy .. wind energy.. heat energy.. etc..
Explanation:
Which one of the following temperatures (in °C) is equivalent to 294 K?
A. 21 °C
b. - 312 °C
c. 39 °C
d. 585 °C
Answer:
21
Explanation: its actually 20.85 but i guess they round to 21
A sound wave is an example of a _____ wave.
longitudinal
fluid
transverse
reverse
Answer:
longitudinal wave
OK hope this will help you
what effect does the earth's surface have on solar radiation?
A. The ground absorbs half the solar radiation and stored it as infrared radiation for centuries
B. Half of the solar radiation is absorbed and converted to infrared (heat)
C. Nearly all solar radiation is reflected back into space by the ground
Answer:
B.
Explanation:
Solar radiation that is not absorbed or reflected by the atmosphere (for example by clouds) reaches the surface of the Earth. The Earth absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth’s surface while around 30% is reflected back to space and does not heat the surface. The Earth radiates energy at wavelengths much longer than the Sun because it is colder. Part of this longwave radiation is absorbed by greenhouse gases which then radiate energy into all directions, including downwards and thereby trapping heat in the atmosphere.
Hope this helps, sorry if it is incorrect. Have a great day/night!
Solar radiation that is not absorbed or reflected by the atmosphere (for example by clouds) reaches the surface of the Earth. The Earth absorbs most of the energy reaching its surface, a small fraction is reflected
What is solar radiation?Solar radiation, often called the solar resource or just sunlight, is a general term for the electromagnetic radiation emitted by the sun.
Solar radiation can be captured and turned into useful forms of energy, such as heat and electricity, using a variety of technologies
Solar radiation that is not absorbed or reflected by the atmosphere (for example by clouds) reaches the surface of the Earth.
The Earth absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth’s surface while around 30% is reflected back to space and does not heat the surface.
The Earth radiates energy at wavelengths much longer than the Sun because it is colder.
Part of this longwave radiation is absorbed by greenhouse gases which then radiate energy into all directions, including downwards and thereby trapping heat in the atmosphere.
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What is missing from the solubility graph shown on the right?
Answer:
the name and the units of the vertical axis. Explanation: As you see the horizontal axis shows that the independent variable is Temperature and that it is reported in °C.
Explanation:
Answer
The horizontal axis reveals to us that the independent variable is temperature which is reporting in C. We know that but what we dont know is the name or the untis on the vertical axis. Also a nice title and chart by it will help as well. A legend as well to explain what the colors even mean.
Explanation:
I got it right on edge.
A sled slides down a hill with friction between the sled and hill but negligible alr resistance. Which of the following must be correct about the resulting change in energy of the sled Earth system?
A) The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction,
B)The gravitational potential energy decreases and the kinetic energy is constant.
C)The decrease in the gravitational potential energy is equal to the increase in kinetic energy
D)The gravitational potential energy and the kinetic energy must both decrease.
Answer:
A) The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction,
Explanation:
The kinetic energy is the energy that the object has and is defied by the work that is needed to accelerate the body. The gravitational potential is a mechanism by which an equal amount of energy is being transferred per unit mass that is needed for the object to move from the specific location.Hence when the sled moves down the hill with the force of gravity it has negligible resistance as an equal amount of energy is dissipated.The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction.
What is principle of conservation of energy?The principle of conservation of energy states that, the total mechanical energy of an isolated system is always conserved.
When a sled slides down a hill with friction between the sled and hill but negligible air resistance.
The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction.
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In electric motors and electric generators, which part is responsible for transferring current from the power source to the commutator or from the slip rings to where the electricity is needed? armature brush axle magnet
Answer:
brush
Explanation:
its correct
Answer:
B. Brush
Explanation:
Edg 2021
which type of motion occur in a lift in one word
Pls answer
Answer:
Explanation:
Lift occurs when a moving flow of gas is turned by a solid object. The flow is turned in one direction, and the lift is generated in the opposite direction, according to Newton's Third Law of action and reaction. Because air is a gas and the molecules are free to move about, any solid surface can deflect a flow.
A 45kg person is standing at the top of a 15m building. If the person falls and lands on a trampoline with a spring constant of 55,000 N/m how much would the trampoline stretch?
[tex]\displaystyle \triangle x = 0.904353 \ m[/tex]
General Formulas and Concepts:Physics
Energy
Gravitational Potential Energy Formula: [tex]\displaystyle U_g = mgh[/tex]
m is mass (in kg)g is gravity (9.8 m/s²)h is height (in m)Spring Potential Energy Formula: [tex]\displaystyle U_k = \frac{1}{2}k \triangle x^2[/tex]
k is spring constant (in N/m)Δx is displacement (in m)Law of Conservation of Energy
Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightEquality Properties
Multiplication Property of EqualityDivision Property of EqualityAddition Property of EqualitySubtraction Property of EqualityExplanation:Step 1: Define
Identify
[Law of Conservation of Energy] [tex]\displaystyle U_g = U_k[/tex] → [tex]\displaystyle mgh = \frac{1}{2}k \triangle x^2[/tex]
[Given] m = 45 kg
[Given] h = 15 m
[Given] k = 55000 n/m
[Solve] Δx
Step 2: Solve for Δx
Substitute in variables [Law of Conservation of Energy]: [tex]\displaystyle (45 \ kg)(9.8 \ m/s^2)(15 \ m) = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle (441 \ kg \cdot m/s^2)(15 \ m) = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle 22491 \ J = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle 22491 \ J = (27500 \ N/m) \triangle x^2[/tex][Division Property of Equality] Divide 27500 N/m on both sides: [tex]\displaystyle 0.817855 \ m^2 = \triangle x^2[/tex][Equality Property] Square root both sides: [tex]\displaystyle 0.904353 \ m = \triangle x[/tex]Rewrite: [tex]\displaystyle \triangle x = 0.904353 \ m[/tex]Topic: AP Physics 1 - Algebra Based
Unit: Energy
Book: College Physics
The equation of a displacement time-curve of a particle is given as x=〖10t〗^2, the instantaneous velocity at t= 1s is *
please find ur answer in the attached image, mark as brainliest if it helps.
1. Which types of planets are more dense: terrestrial or
Jovian?
2. What is a light year?
Answer:
1. terrestrial
2. The distance light travels in one year
Explanation:
Explain why the temperature of the water stays constant
Answer:
When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. ... In addition, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.
Answer:
nice
Explanation:
Motion only occurs if someone is there to witness an object moving
Answer:
True
Explanation:
Motion is change with time of the position or orientation of a body with respect to an observer
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Which of the following could be used to calculate fluid pressure?
Determina la presión que ejercen los patinadores sobre el hielo, teniendo en cuenta que la cuchilla del patín mide 30cm de largo y su grosor es de 5mm, y que el peso de las dos personas es 120kg
Answer:
La presión que los patinadores ejercen sobre el hielo es 7,848,000 Pa
Explanation:
Los parámetros dados de los patinadores en la pala son;
La longitud de la hoja en el patín, l = 30 cm = 0.03 m
El espesor de la hoja, t = 5 mm = 0,005 m
El peso de las dos personas, m = 120 kg
Suponiendo que la sección transversal de la cuchilla sobre el hielo es rectangular, tenemos;
A = l × t
∴ A = 0,03 m × 0,005 m = 0,00015 m²
La fuerza de peso de los dos patinadores, W = m × g
Dónde;
g = La aceleración debida a la gravedad ≈ 9,81 m / s²
m = La masa de los dos patinadores = 120 kg
∴ W = 120 kg × 9,81 m / s² = 1,177,2 N
Presión, P = Fuerza, F/(Área, A)
∴ P = (1.177,2 N) / (0.00015 m²)= 7,848,000 Pascals
La presión que los patinadores ejercen sobre el hielo., P = 7,848,000 Pascals