Please Help! 25 BRAIN POINTS
Romeo (m = 60 kg)runs North towards Juliet (m = 45 kg) at a speed of 1.5 m/s. Juliet runs South towards Romeo at a speed of 2.2 m/s. The 2 collide (epic hug) in a head-on perfectly elastic collision. Find the velocity of the star-crossed lovers immediately after the collision.

Answers

Answer 1

Answer: V' = 1.514m/s

Explanation: Given the Impulse-Momentum Theorum, this is a description of an INELASTIC Collision. When you hug, you stick, making it inelastic.

Formula: m1xV1+m2xV2= pTotal, or total momentum

m1=60kg

V1=1.5m/s

m2=45kg

V2=2.2m/s

so (60)(1.5)+(45)(2.2)=159 kgm/s

To find the Resultant velocity of the lover(s) - plural (signalling inelastic)

you would take the sum of the m1+m2, which is 105kg-> then create the equation 159/105, which is the total momentum divided by the total mass, which would equate to the resultant velocity of an inelastic collision.

Hope this helped.

Related Questions

2. Three identical lamps are connected in
series with each other. If the resistance
of each lamp is X ohms, what is the
equivalent resistance of this series
combination?
(1) ΧΩ
(3) 3X22
(2) 2
2
(4) 2
w/
X

Answers

The equivalent resistance of the series combination is : 3XΩ

Determine the Equivalent Resistance

Equivalent Resistance is the total resistance in circuit (i.e parallel or series circuits).

Bulb in series have the same resistance. Therefore each Bulb has a resistance of XΩ

equivalent resistance = [tex]R_{1}[/tex] + [tex]R_{2}[/tex] + [tex]R_{3}[/tex]

Let [tex]R_{1}[/tex] represent resistance of bulb one

[tex]R_{2}[/tex] represent resistance of bulb two

[tex]R_{3}[/tex] represent resistance of bulb three

equivalent resistance = X + X + X

equivalent resistance = 3XΩ

In conclusion, the equivalent resistance of the series combination of Three identical lamps connected in series with each other with a resistance of X ohms each is 3XΩ

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Why does the chlorine atom have a partial negative charge in a molecule of hydrogen chloride?

Answers

Answer:The molecule is represented by the conventional Lewis structure, even though the shared electron pair is associated to a larger extent with chlorine than with hydrogen. The unequal sharing of the bonding pair results in a partial negative charge on the chlorine atom and a partial positive charge on the hydrogen atom.

Explanation:

one particular descent goes from 2100m to 1600m. Assuming work done against friction is 90% of the potential energy change of the cyclist and the cycle, what increase in speed in Km/h can a rider attain by the end of the
descent?

Answers

Answer:

1/2 M V^2 = .1 M g H where 10% of PE goes into KE

V^2 = .2 g H = .2 * 9.8 * (2100 - 1600) = 980 m^2 / s^2

V = 31.1 m/s increase in speed during descent

1 km / hr = 1000 m / 3600 sec = .278 m/s

V = 31.1 m/s / (.278 m/s / km /hr)= 112 km/hr

What is the current of the ammeter?

Answers

Answer:

.6 A

Explanation:

V = IR

V/R = I

12/20 = I = .6 A

Answer:

a) 0.60 A

Explanation:

Given that,

→ Potential difference (V) = 12 V

→ Resistance (R) = 20 Ω

→ Current (I) = ?

Formula we use,

→ I = V/R

Let's solve the problem,

→ I = V/R

→ I = 12/20

→ [ I = 0.60 ]

Hence, option (a) is the answer.

What is an object’s acceleration if it is moving at 40 m/s and comes to a stop in 5 s?

35 m/s 2

8 m/s 2

–8 m/s 2

200 m/s2

Answers

Answer:

- 8 m/s^2

Explanation:

given:

Final velocity = 0

initial velocity = 40

time = 5 seconds

we can use the equation vf = vi + at

hence,

0 = 40 + 5a

-40 = 5a

a = -8 m/s^2

3. Give an example of a mechanical wave that changes frequency.

Answers

Answer:

No , impossible

Explanation:

Mechanical waves are those waves which requires a medium to travel through. for example sound ,if you put a speaker inside vaccum you can't hear it .As they changes their medium their wavelength is changed but frequency remains same

A body of mass 20KG is set in motion by two forces.3N and 4N acting at right angle to each other. Determine the magnitude of it's acceleration

Answers

Answer:

see below

Explanation:

Reultant force via Pythag Theorem

R = sqrt (3^2 + 4^2) = 5 N

F = ma

5 = 20 a

a = 5/20 m/s^2

The slope of a speed-time linear graph is NOT_____.

acceleration

direction

Answers

Answer:

direction

Explanation:

the slope of a velocity time graph is the acceleration

Fuses protect electrical devices by opening a circuit if the current in the circuit is too high. Would a fuse work successfully if it were connected in parallel with the device that it is supposed to protect

Answers

A fuse is placed in parallel with the device it is supposed to protect will not work successfully.

Meaning of a fuse and how it works

A fuse is an electrical and electronics device that protects a system from excess current. it breaks to deter the flow of current into a device.

The work of a fuse is important to every electrical circuit and device.

A fuse is always in series with the device its to protect, so it can easily break of and by so doing current will not flow to the device again.

In conclusion if a fuse is placed in parallel with the device it is supposed to protect, it will not work successfully.

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What property of matter is most responsible for the fact that sound travels at different speeds through different materials?.

Answers

Answer:

density

Explanation:

higher density ===> higher propagation speed

Two charges with a certain distance apart have an electrostatic force of 400 N acting
between them. If the same charges are separated to 4 times their original distance, what
will the new electrostatic force be between them?
A. 100 N
C. 50 N
E. 1600 N
B. 25 N
D. 400 N

Answers

As the charges’ distance increase, there is a weaker force of attraction between them hence the electrostatic force decreases as distance increases. It increase by 4 (times 4) so the force will decrease by 4 making the answer

=A (400 divided by 4 = 100)

Marcus is looking at the field that surrounds a charged object. Which field is he looking at?
1. Proton field
2. Electric field
3. Magnetic field
4. Gravitational field

Answers

Answer:

I believe it's the electric field.

Explanation:

An ant is crawling up a leaf that is hangin vertically. it lifts 0:007 kg crumb up 0:12 meters. to do this, the ant exerts 0.069 newtons of force. how much work dis the ant do on the crumb?

Answers

Answer:

.000828 j

Explanation:

Work = F * d

.0069 N * .12 m = .000828 j

When a rifle fires, a sequence of events takes place. After the firing pin strikes the primer, what is the next event in the sequence?.

Answers

Answer:

what the freak

Explanation:

the kinetic energy of the whatever hit the bullet is transferred to enabling it to accelerate thus attaining a velocity with which it moves out of the barrel of the gun but some of the kinetic energy is lost in form of sound and heat energy and the bullet travels out the barrel to the target

A metal block has a mass of 5 grams and a volume of 1 cm3. What is the density of a piece of the same identical metal but with a different shape and different volume

Answers

Answer:

ρ = Mass / Volume definition of density

ρ = 5 g / 1cm^3 = 5 g / cm^3

Since the other object is made of the same metal its density is the same:

ρ = 5 g/cm^3

The density of a piece of the same identical metal but with a different shape and different volume is [tex]\rho = 5 g/cm^3[/tex].

What is density?

The density of a substance is its mass per unit volume. Density gives information about how tightly the substance is packed together. The formula for density is

[tex]\rho ={\frac {m}{V}}[/tex]

Unit of density is grams per cubic centimetre.

What are uses of density?One of the most common uses of density is in how different materials interact when mixed together.Wood floats on water because it has a lower density than water, while an anchor sinks as the metal has high density.Balloons filled with helium gas float because the density of the helium is low than the density of air.

Given:

Mass, [tex]m = 5 g[/tex]

Volume, [tex]V = 1 cm^{3}[/tex]

The density of metal is

[tex]\rho = \frac{5}{1}\\ \\\rho = 5 g/cm^{3}[/tex]

Since, the other object is made of the same metal. So, density is the same.

[tex]\rho = 5 g/cm^3[/tex]

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Question 1(Multiple Choice Worth 2 points)
(07.02 LC)
A photon is
O a type of wave
O a form of kinetic energy
O a quantum of light
O an electrostatic force

Answers

A photon is a quantum of light is the correct answer.

What is photon?

A photon is tiny packets of energy of electromagnetic radiation. This concept is presented by Albert Einstein in order to explain the photoelectric effect. Photon is also known as light quantum because it is related to light.

So we can conclude that photon is a quantum of light is the correct answer.

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Answer:

a quantum of light

Explanation:

I got it right on the test.

Two coils connected in series have a resistance of 36 ohm and when connected in parallel have a resistance of 8ohm. Find resistance of each coil

Answers

Answer:

Explanation:

Remark

Two resistances in series has the form of

Rs= C1 + C2

Two resistances is parallel has the form of

Rp = (C1 *C2)/(C1 + C2)

The plan is to first of all find C1*C2 and use this information and C1 + C2 to find the individual resistances.

Givens

Rs = 36 ohms

Rp = 8 ohms

Solution

Rp = C1 * C2/(C1 + C2)

Rp = 8 ohms

C1 + C2 = 36 ohms

8 = C1*C2 / 36 Multiply by 36

8* 36 = C1*C2

C1*C2 = 288

Use Rs to solve for C1

C1 + C2 = 36C1 = 36 - C2

(36 - C2) * C2 = 288

36*C2 - C2^2 =288 Multiply by - 1

-36C2 + C2^2 = -288 Add 288 to both sides

C2^2 - 36C2 + 288= 0 Factor this equation

(C2 - 12)(C2 - 24)

C2 - 12 = 0

C2 = 12

C2 - 24 = 0

C2 = 24

C2 = 24 or

C2 = 12

C1 = 36 - C2

C1 = 36 - 24 = 12

C1 = 36 - 12 = 24

Answer

C1 = 12 ohms or 24 ohms

C2 = 24 ohms or 12 ohms

The magnetic field lines due to a straight, current-carrying wire are __________.

Answers

concentric circles

The Magnetic field lines around a straight conductor carrying current are concentric circles whose centres lie on the wire.

When we say charge is conserved, we mainly mean that charge can be _________. View Available Hint(s)for Part A constant in all bodies transferred without loss like money in a bank created and destroyed in equal amounts saved, like money in a bank

Answers

Answer:

neither created nor destroyed.

Explanation:

Suppose that a college physics experiment goes horribly wrong and releases an electronic pulse that renders all electronic equipment in the cities of columbus, cleveland and cincinnati, ohio permanently useless. No people are hurt, and no buildings are damaged. After the accident, the wages earned by ohio workers will.

Answers

Answer:

It will decrease because the marginal productivities of workers will decrease. Diminishing marginal product occurs when the marginal product of an input goes down as the quantity of the input goes up. The transformation in product resulting from employing one more unit of a particular input for instance, the change in output when a firm's labor is mark up from five to six units, assuming that the mass of other product are kept constant is called The input of marginal product or marginal physical product.

Explanation:

A person on a bicycle travels a distance of 12.5 km in 2.1 hrs, what was the speed of the person on the bicycle?

Answers

Answer:

5.9 km/hour

Explanation:

divide 12.5 by 2.1 and the answer is 5.9

Collisions between galaxies are rare and have little or no effect on the stars and interstellar gas in the galaxies involved. true or false

Answers

Answer:

false

Explanation:

what elements of the company's performance should be used to help make that decision

Answers

The key elements of better decision making can help you rationalize problem, set boundaries around the solution, identify the right thing to do, identify the actions, and get feedback.

How does the atmospheric temperature and size of inner planets compare with those of outer planets?

Answers

The inner planets are rocky and have diameters of less than 13,000 kilometers. The outer planets include Jupiter, Saturn, Uranus, and Neptune. The smaller, inner planets include Mercury, Venus, Earth, and Mars. Inner planet's atmosphere is thin. (Mercury has no atmosphere). Outer Planets: Outer planets' atmosphere is very thick. The four inner planets, Mercury, Venus, Earth, and Mars, are warmer than the outer gas giants. However, the temperature of the planets does not follow a linear path from the Sun.

Hope this helps!
Please give Brainliest!

Activity 2. The Cyclist's Speed!

Directions: Analyze the speed time graph of a cyclist on a straight track and answer the questions below.

1. What time in the graph is the
a. speed constant?________________
b. cyclist accelerating? __________
c. cyclist decelarating? __________

2. Is the motion of the cyclist uniform?
________________________________________________

Answers

Answer:

A. 10 - 20 seconds

B. 0 - 10 seconds and 20 - 30 seconds

C. 30 - 50 seconds

2. No

Explanation:

The maximum distance particles of the medium move when a wave passes through them is wave.

Answers

Answer:

amplitude

Explanation:

A –0.06 c charge is placed is in a uniform electric field with a strength of 200 n/c. what is the magnitude and direction of the force on the charge? 12 n in the opposite direction of the field 12 n in the same direction of the field 3333 n up in the opposite direction of the field 3333 n in the same direction of the field

Answers

The magnitude of the charge is 12 N in the opposite direction of the field.

What is Electric field?

The term electric field refers to the region in space where the effect of a charge is felt. In this case, we are told that the magnitude of the charge is –0.06 C.

Hence;

E = F/q

F = Eq

F = –0.06 C * 200 N/C

F = 12 N

Hence, the magnitude of the charge is 12 N in the opposite direction of the field.

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Answer:

Explanation:

Edge

Continuing from the other question

Answers

Answer:

iv)Salt

III) Ethanol

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Second and third class levers are differentiated by __________. a. the location of the fulcrum b. the location of the load c. the presence of multiple loads d. the type of fulcrum present please select the best answer from the choices provided. a b c d

Answers

Answer:

Its B

Explanation:

Its B because i said its B alright cool bet

Second and third class levers are differentiated by the location of the load. The correct option is b.

The position of the weight in relation to the fulcrum distinguishes second-class levers from third-class levers.

The load is situated in a second-class lever halfway between the fulcrum and the applied force. The effort is placed between the fulcrum and the load in a third-class lever.

The mechanical advantage and the way these levers magnify force or motion depend on where the load is placed in relation to the fulcrum.

Thus, the correct option is b.

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A twin-sized air mattress used for camping has dimensions of 100 cm by 200 cm by 15 cm when blown up. The weight of the mattress is 2 kg. How heavy a person could the air mattress hold if it is placed in freshwater

Answers

For a twin-sized air mattress used for camping has dimensions of 100 cm by 200 cm by 15 cm when blown up, the weight is mathematically given as

M=2923.38N

What is the weight of a person could the air mattress hold if it is placed in freshwater?

Generally, the equation for the maximum mass is mathematically given as

M=Vp-m

Therefore

M=100*200*15(1*10^3)-2kg

M=298kg

In conclusion, the weight

W=298kg*9.81

W=2923.38N