can anyone pls help me with any of these questions i need it asap for my finals tmrw
Answers
Answer:
Answer:2nd question answer is 2.75Answer:2nd question answer is 2.75Explanation:
Mass of ball is missing in your 1st question.
for 2nd question,
Small cart,
m1 = 1.25kg
u1 = 2.5m/sec
v1 = -0.94m/sec ( negative sign indicate opposite motion)
Large cart,
m2 = ?
u2 = 0 m/s
v2 = 1.56 m/sec
from conservation of linear momentum,
m1*u1 + m2* u2 = m1*v1 + m2*v2
1.25*2.5 + m2*0 = 1.25*-0.94 + m2*1.56
3.125 + 0 = -1.175 + 1.56*m2
3.125 + 1.175 = 1.56*m2
4.3 = 1.56*m2
m2 = 4.3/1.56
m2 = 2.75 kg
if they stuck together instead of bounced. then,
total mass of bodies (m)= m1+m2= 4kg
final velocity of bodies (v) = ?
From , conservation of linear momentum,
m1*u1 + m2* u2 = m*v
1.25*2.5 + 2.75*0 = 4*v
3.125 = 4*v
v = 3.125/4
v = 0.78125 m/ sec.
The large cart has a mass of 2.75kg. This can be identified from the law of conservation of momentum. Its unit is kg.s⁻¹/m.
What is the law of conservation of momentum?Momentum is the quantity that describes the motion of the body. The momentum equals the product of mass and velocity. Momentum= Mass/velocity. It depends on the velocity as velocity changes momentum also changes.
The law of conservation of momentum states that the initial and final momentums are the same in the system. It shows that the momentum of the system remains constant, before and after the collision.
In an isolated system of two bodies acting on each other, total momentum remains constant in the absence of external forces. It can neither be created nor destroyed.
Law of conservation of momentum:
Total momentum before collision = Total momentum after the collision
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
From the givens,
Mass of small chair, m₁ = 1.25kg,
The initial speed of the small chair before the collision, u₁ = 2.5 m/s,
The final speed of the small chair after the collision, v₁ = - 0.94 m/s (negative sign opposite sign),
The initial speed of the large chair before the collision, u₂ = 0 (large chair is at rest before the collision),
The final speed of the large chair after the collision, v₂ = 1.56 m/s,
The mass of a large chair m₂ =?
From the conservation of momentum:
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
(1.25×2.5) + (m₂×0) = (1.25(-0.94) + (m₂×1.56)
3.125 + 0 = - 1.175 +( m₂×1.56)
3.125+1.175 = ( m₂×1.56)
4.3 / 1.56 = m₂
m₂ = 2.75kg
Hence, the mass of a large chair, m₂ = 2.75kg.
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Related Questions
Your driver's license is at risk of being cancelled if you: O A. Lied on the license application. O B. Are caught driving under the influence. O C. Cause an accident that injures another person. O D. Have more than three traffic violations in one year
Answers
Your driver's license is at risk of being cancelled if you have more than three traffic violations in one year. The correct option is D.
What is driving license?The license by the central government to an individual to travel on road by his own vehicle on terms and conditions to be strictly followed.
When a driver is moving with his vehicle and come across the traffic signal, he must follow them. If he violates the traffic signals more than three times, he will get his license cancelled.
Thus, your driver's license is at risk of being cancelled if you have more than three traffic violations in one year. The correct option is D.
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In a car lift, compressed air exerts a force on a piston with a radius of 26.00 cm. This pressure is transmitted to a second piston with a radius of 43.0 cm. a) How large a force must the compressed air exert to lift a 2.33x103 N car? b) What pressure produces this force? Neglect the weight of the pistons.
Answers
Pascal's Law
[tex]\tt \boxed{\bold{\dfrac{F_1}{A_1}=\dfrac{F_2}{A_2}}}[/tex]
a. F₁/πr₁²=F₂/πr₂²
F₁/26²=2.33 x 10³/43²
F₁=8.51 x 10² N
b. P = F/A
P = 8.51 x 10²/π26²
P = 0.4 Pa
Find the equivalent resistance of this circuit.
Answers
Step-by-step explanation :
Here we just need to see the resistors which are connected in series combination. (Remember that you need not to use the potential difference in this question because we aren't asked to calculate the current).
As we know that,
Rs = R1 + R2 ... Rn>> Rs = 50 + 100
>> Rs = 150Ω
Therefore,
Resistance in series combination is of 150Ω.Can someone please answer this, ill give you brainliest Would be very appreciated.
Answers
Answer:
caves
Explanation:
Thermal stress causes the breaking of rocks caused by heating/cooling. You may choose deserts (due to heat) but if you think about it, there are not many rocks present compared to caves where it is more likely.
27. A rock is lying at the top of a 2 m high cliff and it possesses a potential energy of 80 J. What
is the mass of the rock?
A 1.32 kg
B) 2.85 kg
C 3.94 kg
D) 4.08 kg
FINAL PLEASE HELP !!!
Answers
I used a calculator for it.
Water flows into a vertical cylindrical tank at the rate of 24 cubic ft per minute. If the radius of the tank is 4 ft, how fast is the surface rising?
Answers
per min= 24 cubic ft
radius= 4 ft
to find:how fast the surface rises.
solution:[tex]area = \pi {r}^{2} [/tex]
[tex]a = \pi \times {4}^{2} [/tex]
[tex]a = 50.24 \: {ft}^{2} [/tex]
[tex]v = 24 \: {ft}^{3} [/tex]
[tex] = \frac{24}{50.24} [/tex]
[tex] = 0.48[/tex]
therefore, the rising in the surface area is 0.48 feet per minute.
24 / 50.24 = 0.48 feet per minute
so the answer to your question is 0.48 feet per minute.
hope this helps you
What part of the sun is visible during a total solar eclipse.
Answers
Answer:
During total eclipse only Corona (Chromosphere) will be visible.
Explanation:
The outermost layer Corona is not visible during normal time. It is visible only when Moon hides the Sun, at that we can see the corona.
What is the schwarzschild radius of a 10 solar mass black hole?.
Answers
Answer:
30km
Explanation:
Hope this helps and have a nice day :)
Base your answers to questions 8 and 9 on the information and diagram below and on your
knowledge of physics.
A ray of monochromatic light (f- 5.09 x 10^14 Hz) passes from medium X into air. The angle of
incidence of the ray in medium X is 25°, as shown.
8. Using a protractor, measure and record the angle of refraction in the air, to the nearest degree.
9. Calculate the absolute index of refraction of medium X.
10. Base your answer to the following question on the information below.
A student plucks a guitar string and the vibrations produce a sound wave with a frequency of
650 hertz.
Calculate the wavelength of the sound wave in air at STP.
Answers
A ray of monochromatic light passes from medium X into air. The refractive index of medium X is 1.52.
What is Snell's law?It states that the ratio of sine of angle of incidence and angle of refraction is equal to the refractive index of second medium to the first medium.
sini/sinr = n₁/n₂
Given the angle of incidence i = 25 degrees, angle of refraction r =40 degrees, refractive index of air n₁ =1, then refractive index of medium X is
n₂ = 1 x sin 40/sin25
n₂ = 1.52
Thus, the refractive index of medium X is 1.52.
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What is the energy of a photon with a wavelength of 245 nm
Answers
The energy of a photon with a wavelength of 245 nm will be 8.08 ×10⁻¹⁹ J. De Broglie relation is used to find out the energy.
What is wavelength?The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The relationship between the wave's wavelength,energy is;
[tex]\rm E = \frac{hc }{\lambda} \\\\ \rm E = \frac{6.6 \times 10^{-34} \times 3 \times 10^8}{245 \times 10^{-9}} \\\\ \rm E=8.08 \times 10^{-19}\ J[/tex]
Hence, the energy of a photon will be 8.08 ×10⁻¹⁹ J.
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Okay, so I have a project and we have to create a brochure to promote a planet and try to get people to visit. We also have to create a catchy slogan
I dunno if this is a good site to ask on, but I NEED HELP CREATING A SLOGAN FOR NEPTUNE. PLEAASE HELP :(
Answers
Explanation:
the tune of neptune is better thatbany other tune
hope it helps
Part B Next you'll investigate how precipitation varies throughout Earth. Visit the My NASA Data e website and select Data Set in the top left corner. Within the Hydrosphere category, select All Data. Within All data category select Precipitation, and then select Monthly Precipitation. After the new map appears, select Animate near the top of the page, and then select OK to see the animation. Set the time range on the animation for the most recent five years, and then click Submit. You can control the speed of the animation with the controls beneath the map. Question 1 Describe patterns you see in the precipitation on Earth. How do these patterns change during the course of a year and from year to year? Use lines of latitude and the amount of precipitation in millimeters/day (mm/day) in your description.
Answers
The patterns you see in the precipitation on Earth are that it is often distributed evenly or unevenly via:
Geographical methodTemporal methodSeasonal methodWhat is the pattern of precipitation on earth?The yearly precipitation over the Earth is found to be approximately about 100 cm (that is 39 inches).
Note that is one that is often distributed unevenly. The areas of highest rainfall is known to be in the equatorial zone and the monsoon area of Southeast Asia.
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A 30 ohm resistor and a 20 ohm resistor are
connected in series with a 100 volt battery. What is
the electrical current that would pass through the
30 ohm resistor?
Answers
The current that would pass through the 30 ohms resistor is 2 A.
What is electric current?Electric current is the rate of flow of electric charge round a conductor.
To calculate the electric current that would pass through the 30 ohms resistor, we use the formula below
Formula:
I = V/Rt........... Equation 1Where:
I = Electric current passing through the 30 ohms resistorV = VoltageRt = Total or effective resistance of the resistors.From the question,
Given:
V = 100 voltsRt = (30+20) ohms (since both resistors are connected in series)Rt = 50 ohmsSubstitute these values into equation 1
I = 100/50I = 2 AHence, The current that would pass through the 30 ohms resistor is 2 A.
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matter is any thing that has mass and occupies space
Answers
Answer:
yes omg u are so handsome
Two waves have amplitudes of 10 m and 7 m, respectively. What are the maximum and minimum amplitudes of the resultant wave if they interfere first constructively, and then destructively?.
Answers
I hope this helps you....
The diagram shows a positive charge moving in a magnetic field. a field of circles labeled b. there is a positively charged particle with a velocity vector pointing left labeled v. in which direction is the magnetic force acting on the charge? into the screen out of the screen up down
Answers
The magnetic force will be point upwards in perpendicular direction to the field.
What is the direction of magnetic force?The direction of the magnetic force on negative charge occurs in the opposite direction while it is directed to the positive charge direction.
From the given image and description, the positively charged particle with a velocity vector, v is pointing left, thus we can conclude that the magnetic force will be point upwards in perpendicular direction to the field.
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Answer:
c
Explanation:
A 2 kg ice cube is released from point A and slides on a frictionless track as shown in the figure. Determine the speed of the cube at points B and C.
Answers
According to the conservation of energy
Potential energy at any given instance is equal to the Kinetic energy as energy can neither be created nor be destroyedMass is 2kg=m
#A
h=5m
PE=mghPE
2(9.8)(5)10(9.8)98JNow
KE=98J1/2mv²=98J1/2×2v²=98Jv²=98Jv=√98v=9.4m/s#B
h=3.2m
PE:-
2(3.2)(9.8)6.4(9.8)62.7JNow
KE=62.7J1/2mv²=62.7v²=62.7v=√62.7v=7.9m/s#C
h=2m
PE
2(2)(9.8)4(9.8)39.2JNow
v²=39.2v=√39.2v=6.3m/sA 4.4 nC charge exerts a repulsive force of 36 mN on a second charge which is located
a distance of 0.70 m away from it. What is the charge (magnitude and sign) of the
second charge?
Answers
The magnitude and sign of the second charge will be + 8.6241×10⁻¹⁹ C. The principal of the Columb's law is used in the given problem.
What is Columb's law?The force of attraction between two charges, according to Coulomb's law, is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Charges that are similar repel each other, whereas charges that are diametrically opposed attract each other.
They will repel, moving in opposite directions at the same speed. Because the magnitude and nature of the charge are the same.
The given data in the problem is;
q₁ is the charge 1 = 4.4 nC = 4.4 ×10⁻⁹ C
F is the repulsive force = 36 mN =36 ×10⁶ N
d is the distance = 0.70 m
The Coulomb force is found as;
[tex]\rm F = \frac{Kq_1q_2}{r^2}\\\\\ \rm 36\times 10^6 = \frac{9 \times 10^9 }{(0.7)^2} \times 4.4 \times 10^{-9} \times q_2\\\\\ q_2 = 8.6241 \times 10^{-19 } \ C[/tex]
Hence, the magnitude and sign of the second charge will be + 8.6241×10⁻¹⁹ C.
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Explain how to get a positive electric charge
Answers
Answer:
An electrical charge is created when electrons are transferred to or removed from an object. Because electrons have a negative charge, when they are added to an object, it becomes negatively charged. When electrons are removed from an object, it becomes positively charged
+
2.
2. Write the following chemical equations as
1. 4 Fe + 3 02->2 Fe2O3
5
The scientific name for this equation
Answers
Answer:
The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.
The Law of conservation of mass governs the balancing of a chemical equation.
According to this law, mass can neither be created nor be destroyed in a chemical reaction and obeying this law total mass of the elements or molecules present on the reactant side should be equal to the total mass of elements or molecules present on the produc
Is it accurate to say that galaxies take up most of the volume of space? Why or why not?
Answers
Answer:
ntergalactic space takes up most of the volume of the universe, but even galaxies and star systems consist almost entirely of empty space.
Explanation:
so to be exact galixes do make up most of the volume of space because galaxies are what make up space!
Where do living things get the specific instructions for the proteins they make?
Answers
Answer:
large membrane enclosed structure
Hi, I’m a sixth grader that REALLY needs help with her science homework. So if you could please tell me the answers to the questions then that would be great! (By the way the questions are in a random order so if you could tell me which one your talking about, that would be awesome) Thanks again!
Answers
Answer:
ok so the first one is (b) the next one is (c)
Explanation:
Czerski says the best reason that she can think of for studying physics has to do with how each of us has three life-support systems – what is meant by this? Explore this idea and identify where forensics fits into this three-life support system.
Answers
Answer:
The three life-support systems she talks about are, not just our own body, but civilization and the earth. All these things help us to survive. In forensics, this could be applied to finishing a case. Forensic’s life-support relies on, our knowledge, evidence, and technology.
Orginize it
What category would these go in??
Categorys : Radiation, conduction, and convection
Answers
- The sun’s radiation (no direct contact) is what causes the skin to burn.
Radiation: Microwave cooking food
- Microwaves use radiation to heat the food inside of it; between radio waves and infrared radiation on the electromagnetic spectrum
Conduction: Touching a hot car seat in the summer
- Conduction is the transfer of heat by direct contact (hand to seat).
Conduction: Burning yourself with a curling iron (Similar to above; direct contact).
Convection: An ocean breeze
- Convection near coastlines cause the transfer of energy; water warms and cools slower than land.
Conduction: Sliding down a hot metal slide in august
- You are in direct contact with the slide, which is hot due to the temperature.
Convection: Water in a boiling pot of macaroni
- The water, a liquid, is being heated by molecular motion.
Convection: Currents deep within the earth that cause tectonic plates to move
- Convection currents drive the movement of tectonic plates in the mantle, which is fluid/molten. The currents circulate under the asthenosphere.
How do stars die?
Pls help
Answers
Answer: Stars die when their nuclear fuel runs out.
Explanation:
Answer: The final events of a star's life are determined by its mass. Massive stars swiftly burn through their hydrogen fuel, yet are hot enough to fuse heavier elements like helium and carbon.
Explanation:
What is the relation between electric intensity dn flux
Answers
The relation between the electric intensity and electric flux is that the electric flux is equal to the scalar product of electric flux intensity and vector area.
What is the relation between electric intensity and flux?The electric field is the field, which is surrounded by the electric charged. The electric field is the electric force per unit charge.
The intensity of this electric field is the number of electric field lines which are pass perpendicular to the unit element of fixed area.The flux of this electric field is the number of electric field lines which are pass normally to the fixed area.The electric flux can be given as,
[tex]d\phi =\vec E \;dA\cos \theta[/tex]
When angle is zero,
[tex]d\phi =\vec E \;dA\times1\\d\phi =\vec E \;dA[/tex]
Thus, the total flux is,
[tex]\phi=\oint_{}^{}\vec E.d\vec A[/tex]
Thus, the relation between the electric intensity and electric flux is that the electric flux is equal to the scalar product of electric flux intensity and vector area.
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Three spheres, with masses indicated above, are
initially far away from each other, and the
gravitational potential energy of the three-sphere
system is zero. The spheres are then brought
together until each sphere is a distance r from
the other two, as shown above. What is the new
gravitational potential energy of the three-sphere
system?
Answers
Answer:
-5Gm^2/r
Explanation:
You don't have the graph, but I know what question you are talking about. The answer is above.
The new gravitational potential energy of the three-sphere system will be[tex]- \frac{5Gm^2}{r}[/tex].
What is gravitational potential energy ?The energy that an item has due to its location in a gravitational field is known as gravitational potential energy.
For the sphere 1 we have to perform no work. Hence, the work done is zero.
[tex]\rm W_1 = 0[/tex]
The mass m is to be brought to be infinity. Because there is potential at B due to mass m at A point .
[tex]\rm W_2 = \frac{-Gm}{r} \times m \\\\ W_2 =-\frac{Gm^2}{r}[/tex]
The B2 m at C is brought to infinity. For we have to do work . The gravitational potential energy for the mass 2 m is;
[tex]\rm W_3 = \frac{-Gm}{r} \times 2m\\\\ W_3 = \frac{-4Gm^2}{y} \\\\[/tex]
The new gravitational potential energy of the three-sphere system will be;
[tex]\rm W =W_1+W_2+W_3 \\\\\rm W =-0-\frac{Gm}{r}-4\frac{-Gm^2}{r^2} \\\\ W=\-\frac{-5Gm^2}{r^2}[/tex]
Hence, the new gravitational potential energy of the three-sphere system will be[tex]- \frac{5Gm^2}{r}[/tex].
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A toy car with a mass of 3 kg starts at rest. A spring performs 220 J of work on the car. Using the Work-Energy Theorem determine the approximate final velocity of the toy car.
a) 660 m/s
b) 147 m/s
c) 73 m/s
d) 12 m/s
Answers
The final velocity of the toy car given the data from the question is 12 m/s (Option D)
What is velocity?This is defined as the rate of change of displacement with time.
However, the velocity of an object is related to its energy according to the following equation
E = ½mv²
Where
E is the energym is the massv is the velocityHow to determine the velocityFrom the question give above,the. following data were obtained
Energy (E) = 220 JMass (m) = 3 KgVelocity (v) = ?E = ½mv²
220 = ½ × 3 × v²
220 = 1.5 × v²
Divide both side by 1.5
v² = 220 / 1.5
Take the square root of both side
v = √(220 / 1.5)
v = 12 m/s
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Standing wave has nodes at the top
true or false
Answers
Answer:
false
Explanation: im smart
