A mass of 5 kg is moving at 5 m/s when it collides with another mass of 2 kg moving in the same direction at 2 m/s. After the collision they become bonded together. What is the final velocity of the two masses together? 2.22 m/s

6.23 m/s

3.56 m/s

4.14 m/s

Answer:

Both are electromagnetic waves

Explanation:

Both microwaves and light waves form a part of the electromagnetic spectrum. Electromagnetic waves are produced as a result of oscillating magnetic and electric fields. when arranged in order of frequencies and wavelengths they form the electromagnetic spectrum.

Explanation:

those are the examples

Answer:

0.52 m/s

Explanation:

Energy is conserved.

Initial kinetic energy + initial potential energy = final kinetic energy + final potential energy

½ m v₁² + ½ k x₁² = ½ m v₂² + ½ k x₂²

m v₁² + k x₁² = m v₂² + k x₂²

Given:

m = 1.3 kg

k = 52 N/m

v₁ = 0.28 m/s

x₁ = 0.081 m

x₂ = 0.081 m / 2 = 0.0405 m

(1.3) (0.28)² + (52) (0.081)² = (1.3) v² + (52) (0.0405)²

v = 0.52

The velocity halfway to the equilibrium position is 0.52 m/s.

We have that the beam of light that emerges from water into air at an angle that  bends

Away from the normal

Option B is correct

Normal of a Plane

In geometry, a normal is an object such as a line, ray, or vector that is perpendicular to a given object. The normal line to a plane curve at a given point is the line perpendicular to the tangent line to the curve at the point.

Therefore it is seen From the Question Image that

The Beam is NOT bent

But Rather

Away from the normal.

In conclusion

The beam of light that emerges from water into air at an angle that  bends

Away from the normal

Option B is correct

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Yes, scientific method can be applied on many everyday activities to get a reasonable solution. Infact normally we are applying this method without having it in our knowledge that we are applying it.

For example: In morning we are going to office and we start the car, but it is not started.You turn the engine again and again but it simply donot works.

Observation (the state of defining a problem):

The car is not started

Hypothesis (A possible solution based on the information we already know):

The car is not started because it might be out of gas or there can be some other technical fault.  

Experiment (testing of hypothesis by applying different methods of solving problem):

You get the fuel and put it inside the car but it still donot works and car didnot start. Experiment didnot get solution.

Analyze the results of data and test another hypothesis

You call a technician and he check with the car engine tries and finds out that the engine was out of order and needs repairing.

Draw conclusion:

The engine do not works when it is out of order and it is a cause of a car not being started.

Now the theory and law making part can not be applied on this case but it is a part of scientific method.

Hope it helps!

B. The electric potential energy of charge is [tex]1.9 \times 10^{-4} \ \mathrm{J}[/tex] if charge of [tex]24 \ \mu \mathrm{C}[/tex] is at a location where electric potential is 8.0 V.

The capacity required charge to move from a place to another is termed as electric potential energy.

The potential energy is given by the formula:

[tex]P E=q \Delta V[/tex]

Where,

PE is electric potential energy

q is charge

[tex]\Delta V[/tex] is electric potential

Given:

[tex]q=24 \ \mu \mathrm{C}=24 \times 10^{-6} \ \mathrm{C}[/tex]

[tex]\Delta V=8.0 \ \mathrm{V}[/tex]

Now,

[tex]\Rightarrow P E=24 \times 10^{-6} \times 8.0[/tex]

[tex]\therefore P E=1.92 \times 10^{-4} \ J[/tex]

Hence, we can say that [tex]1.92 \times 10^{-4} \ J[/tex] is electric potential energy for the given conditions.

Newton's second law for an object's motion in one spatial dimension:

F = ma

F is the net force acting on the object, m is the object's mass, and a is the object's acceleration.

Given values:

F = 20N

a = 50m/s²

Plug in these values and solve for m:

20 = m(50)

m = 0.4kg

Choice C

Using Newton's Second Law of Motion, the mass of the object is calculated as 0.4 kg by dividing the force (20 N) by the acceleration (50 m/s²), corresponding to option C.

The question is asking to determine the mass of the object based on the given force and acceleration using Newton's Second Law of Motion. According to Newton's Second Law, Force (F) equals mass (m) times acceleration (a), which is expressed as F = m * a. To find the mass, we rearrange the equation to m = F / a.

In this case, the force (F) is 20 Newtons (N), and the acceleration (a) is 50 meters per second squared (m/s²). Plugging these values into the equation, we get:

m = F / a = 20 N / 50 m/s² = 0.4 kg

Therefore, the mass of the object is 0.4 kg, which corresponds to option C.

[tex]a = \frac{v - u}{t} [/tex]

^^acceleration formula

[tex]s = \frac{1}{2} (u + v) \: t[/tex]

^^displacement formula

since the acceleration due to gravity is 9.8m/s^2 or 10m/s^2

9.8 = v-0/5

v = 49m/s

s= 1/2 (49m/s +0 m/s) 5

s= 122.5m

Answer:

b. 20 sec

Explanation:

y = y₀ + v₀ t + ½ g t²

0 = 0 + (100) t + ½ (-10) t²

0 = 100t − 5t²

0 = t (100 − 5t)

t = 0, t = 20

The body lands after 20 seconds.

1. distance plus direction

displacement

2. 30 m/s northwest, for example

velocity

3. total distance divided by total time

average speed

4. what an object going around a curve at a constant speed is

undergoing

acceleration

5. 30 m/s, for example

speed

6. any non-directional quantity

scalar

The given terms are matched with their respective definitions as follows,

The distance plus direction is known as displacement, 30 meters / second northwest is an example of the velocity,  total distance divided by the total time then an object going around a curve at a constant speed is undergoing acceleration.

Displacement describes this shift in location.

1. distance plus direction ⇒⇒displacement

2. 30 m/s northwest, for example, ⇒⇒velocity

3. Total distance divided by the total time ⇒⇒average speed

4. An object going around a curve at a constant speed undergoing ⇒⇒acceleration

5. 30 m/s, for example, ⇒⇒speed

6. Any non-directional quantity ⇒⇒ scalar

Thus, An object traveling around a curve at a constant speed experiences acceleration. Distance plus direction is known as displacement, and 30 meters per second to the northwest is an example of velocity.

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Answer:

A. 0.012 Watts

Explanation:

P = IV = I² R

Given I = 0.02 A and R = 30 Ω:

P = (0.02)² (30)

P = 0.012 W

The power in an electrical circuit is given by the equation P= PR, the power in the circuit is 0.6 watts. The correct option is D.

In physics and electrical circuits, power refers to the rate at which work is done or energy is conveyed. It quantifies the rate at which energy is used or generated in a system.

The power in an electrical circuit may be calculated using the equation P = I * R, where P is the power, I is the current flowing through the circuit, and R is the circuit's resistance.

The current (I) is 0.02 amps in this example, while the resistance (R) is 30 ohms.

P = I * V

P = 0.02 A * 30 Ω

P = 0.6 watts

Therefore, the power in the circuit is 0.6 watts.

Thus, the correct answer is D. 0.6 watts.

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Answer:

B. 1.5:1

Explanation:

Let's take mercury(Hg) for an example.

Mercury have proton number of 80 and neutron number of 121.

To know the ration, you need to divide the neutron number with the proton number.

121/80

=1.5/1

Then, change the answer to ratio form=1.5:1

Explanation:

if two vectors are perpendicular to each other then thier dot product is equal to zero so (2i+3j+8k).(-4i+4j+ak)=0 (2)(-4) +(3)(4)+(8)(a) =0 -8+12+8a=0 4+8a=0 8a=-4

[tex]a = \frac{ - 4}{8} [/tex]

[tex]a = \frac{ - 1}{2} [/tex]

After the mechanical waves passes by, the particles of the medium will settle right back at their rest position (A).  

It doesn't matter whether the wave was a longitudinal or a transverse one.

[tex]\huge\text{Hey there!}[/tex]

[tex]\huge\text{What s a successful result of science?}[/tex]

[tex]\huge\text{A discovery is a successfully result of science}[/tex]

[tex]\huge\text{Reason?}[/tex]

[tex]\huge\text{Well, because it known for the working or making}[/tex] [tex]\huge\text{'newer' discovers so it can tell us humans}[/tex] [tex]\huge\text{that something is theoretically correct}[/tex]

[tex]\boxed{\boxed{\huge\text{Thus the answer is A. a discovery}}}\huge\checkmark[/tex]

[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{LoveYourselfFirst:)}[/tex]

Answer:

1. 31 Ω

2. 42 Ω

3. V = IR

4. 4 A

5. 1.37 A

Explanation:

Sorry if I make any mistakes reading your handwriting.  If I do, let me know and I'll fix it.

1.  "Resistors of 5Ω, 10Ω, and 16Ω are connected in series.  Find the total resistance."

The resistance of resistors in series is the sum:

R = R₁ + R₂ + R₃

R = 5Ω + 10Ω + 16Ω

R = 31Ω

2.  "The total resistance of two resistors connected in series is 75Ω.  The value of one resistor is 33Ω.  What is the value of the other one?"

Since they are in series, the total resistance is the sum:

75Ω = 33Ω + R

R = 42Ω

3. "State Ohm's law."

Ohm's law states that a voltage drop across a resistor is equal to the resistance times the current.

V = IR

4. To find the current, we first find the total resistance, then use Ohm's law.

R = 10Ω + 15Ω + 30Ω

R = 55Ω

V = IR

220 V = I × 55Ω

I = 4 A

5. Same steps as before.

R = 1.5Ω + 4Ω + 12Ω

R = 17.5Ω

V = IR

24 V = I × 17.5Ω

I = 1.37 A

Answer:

120 m/s

Explanation:

Acceleration = 6.4 m/s²

Initial velocity = 0 m/s

Time = 18 s

v = at + v₀

v = (6.4)(18) + 0

v = 115.2

Rounded to two significant figures, the final velocity is 120 m/s.

Answer:

60 kg

Explanation:

The man's weight is equal to the weight of the water he displaces.

mg = ρVg

m = ρV

m = (1000 kg/m³) (3 m × 2 m × 0.01 m)

m = 60 kg

The man's mass is 60 kg.

Answer:

New Moon

The Moon's position in space at New Moon.

New Moon is the first primary phase and it occurs the moment when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon.

A New Moon cannot normally be seen from Earth since only the dark side of the Moon faces our planet at this point. Sometimes, if the New Moon is close to the Lunar nodes of its path, it can cause a Solar Eclipse.

The greatest difference between high and low tide, also known as spring tides, takes place around New Moon and Full Moon.

Waxing Crescent Moon

The moment a thin sliver of the Moon becomes visible after New Moon is the beginning of the first intermediate phase, the Waxing Crescent Moon.

In the past, this used to be called New Moon while the darkest phase was called Dark Moon. This traditional definition of New Moon is still in use in some cultures, defining the beginning of the months for instance in the Islamic calendar.

The rest of the Moon is also sometimes faintly visible during most of this phase because Earth also reflects sunlight onto the Moon, a phenomenon called earthshine.

First Quarter Moon

First Quarter Moon is the second primary phase.

First Quarter Moon is the second primary Moon phase and it is defined as the moment the Moon has reached the first quarter of its orbit around Earth, hence the name. It is also called Half Moon as we can see exactly 50% of the Moon's surface illuminated. Whether you see the left or right half illuminated, depends on several factors, including your location.

The smallest difference between high and low tide, also known as neap tides, occurs around the 2 Quarter Moons.

Waxing Gibbous Moon

The second intermediate phase, the Waxing Gibbous Moon, lasts until the next primary phase. Waxing means that it is getting bigger. Gibbous refers to the shape, which is larger than the semicircle shape of the Moon at First Quarter, but smaller than a full circle.

Full Moon

Full Moon is the brightest phase.

@timeanddate.com

The Full Moon appears in the night sky when the Sun and the Moon are aligned on opposite sides of Earth.

How can Full Moon be in the daytime?

Technically, this alignment only lasts a moment. However, the Moon can appear to be full a day before or after while more than 98% of the Moon's disc is illuminated.

When a Full Moon occasionally passes through Earth's shadow, it will cause a lunar eclipse.

When the Full Moon comes close to the points of its orbit that are closest or farthest away from Earth, we call it a Supermoon or Micromoon, respectively.

What is the Moon Illusion?

Waning Gibbous Moon

The next intermediate Moon phase is the Waning Gibbous Moon. The portion of the visible half of the Moon illuminated decreases during this period.

Third Quarter Moon

Third Quarter Moon is the last primary phase.

The Third Quarter Moon occurs the moment the opposite half of the Moon is illuminated compared to the First Quarter Moon.

Waning Crescent Moon

The Waning Crescent Moon. The Sun illuminates less than half of the visible part of the Moon during this Moon phase and you can sometimes see earthshine on the rest of the Moon towards the end.

Explanation:

Answer:

The new Moon appears during a period when the earth, the Moon,  and the Sun are all in a single line. Since the Moon is in between the Sun ad the Earth , the side of the Moon that directly facing the Earth is dark.

During full Moon, the three bodies  are also approximately in a line, but  the moon at this stage is on the other side of earth, so the Sun lights up the the section of the earth facing it.

At first quarter and last quarter, the Moon is located at a position perpendicular to a line between Earth and the Sun. one section of the moon is dark while the other will be brightened

Crescent refers to phases where the less than half of the moon is illuminated while gibbous is the phase where  more than half of the moon is illuminated.

After the new Moon phase, The waxing crescent is visible due to exposure some reflected sunlight rays . The lunar crescent continue to grow until first-quarter Moon. As the right section of the Moon extend to more than half of the Moon's face, the Moon becomes waxing gibbous.

Then, right after the full Moon, the right section begins to reduce again to make a waning gibbous and which then turn into a third-quarter Moon. The exposure to sunlight continues to lessen until the moon is a waning crescent and then a new Moon. The full cycle is carried out in  29.5 days.

Answer:

Blind search

Explanation:

The blind search is a problem solving strategy which can be used to solve the problems of relatively simpler nature, and can only distinguish non-goal and goal state with no idea that which state is more promising.

In this example, blind search was used to reach the goal (Going up and down each isle).

Hope it helps!

Answer:

A

is answer

because of questions

Answer:

D. A football thrown upward at an angle.        

Explanation:

When an object is thrown in space, it is known as projectile and its motion is known as projectile motion. 1 dimensional motion refers to the motion either in horizontal or vertical direction. 2-dimensional motion refers to the motion in both horizontal and vertical direction. A football thrown at an angle will have constant horizontal velocity and accelerated motion in vertical direction. Thus, it is an example of projectile motion as well as two-dimensional motion.

Explanation:

Ohm's law describes the relationship between voltage, current, and resistance.

V = IR

where V is voltage, I is current, and R is resistance.

A. At the original voltage:

V₁ = I₁ R₁

When the voltage is doubled and resistance stays the same:

2V₁ = I₁' R₁

Dividing the two equations:

2V₁ / V₁ = (I₁' / I₁) (R₁ / R₁)

2 = I₁' / I₁

So the new current is double the original current.

B. At the original voltage and resistance:

V₂ = I₂ R₂

When both the voltage and resistance are increased by a factor of 2:

2V₂ = I₂' (2R₂)

Dividing the two equations:

(2V₂ / V₂) = (I₂' / I₂) (2R₂ / R₂)

2 = (I₂' / I₂) (2)

1 = I₂' / I₂

So the new current is the same as the original current.

Based on Ohm's Law, if voltage in an electric circuit is doubled, the current also doubles. However, if both voltage and resistance are doubled, the current remains the same.

The subject you're asking about is focused on how changes in voltage and resistance can affect current, according to Ohm's law. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them. It can be represented by the formula I = V/R, where I is the current through the conductor, V is the voltage, and R is the resistance.

If the voltage is increased by a factor of 2, while the resistance remains constant, the current would also increase by a factor of 2. So the ratio Ifinal1/Iinitial1 would be 2/1 = 2.

If both the voltage and resistance are increased by a factor of 2, the current would remain the same, because the increase in voltage would be offset by the increase in resistance. Thus, the ratio Ifinal2/Iinitial2 would be 2/2 = 1.

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Answer: Electrons are transferred → Ions form → Ions are attracted to each other

Explanation:

Answer: Option (d) is the correct answer.

Explanation:

An ionic bond is defined as the bond that is formed by transfer of electron(s) from one atom to another.

For example, Lithium has atomic number 3 and first, it will form an ion by loosing an electron.

         [tex]Li \rightarrow Li^{+} + 1e^{-}[/tex]

On the other hand, chlorine has atomic number 17 and it needs one electron to form a chlorine ion. So, it will gain an electron from lithium atom.

          [tex]Cl + 1e^{-} \rightarrow Cl^{-}[/tex]

Therefore, these ions will then get attracted towards each other resulting in the formation of lithium chloride compound.

Thus, we can conclude that the correct order of steps during the formation of an ionic bond is ions form - Electrons are transferred – Ions are attracted to each other.

Answer:

25.2

Explanation:

F=KL

L=F/K

L=7.50/0.298

L=25.2M

Answer:

1.Theimage will be located at -0.13m or -13 cm

2.The height of the image will be 0.052m or 5.2cm

Explanation:

Given that;

Height of object, h=20 cm = 0.2m

Object distance in front of convex mirror, o,= 50 cm =0.5m

Radius of curvature, r, =34 cm =0.34m

Let;

Image distance, i,=?

Image height, h'=?

You know that focal length,f, is half the radius of curvature,hence

f=r/2 = 0.34/2 = 0.17m ( this length is inside the mirror, in a virtual side, thus its is negative)

f= -0.17m

Apply the relationship that involves the focal length;

[tex]=\frac{1}{o} +\frac{1}{i} =\frac{1}{f}[/tex]

[tex]=\frac{1}{0.5} +\frac{1}{i} =-\frac{1}{0.17}[/tex]

Re-arrange to get i

[tex]\frac{1}{i} =-2-5.88\\\\\\\frac{1}{i} =-7.88\\\\i=-0.13m[/tex]

This is a virtual image formed at a negative distance produced through extension of drawing rays behind the mirror if you use rays to locate the image behind the mirror

Apply the magnification formula

magnification, m=height of image÷height of object

[tex]m=\frac{h'}{h} =-\frac{i}{o}[/tex]

substitute the values to get the height of image h'

[tex]\frac{h'}{0.20} =-\frac{-0.13}{0.5} \\\\\\h'=\frac{0.13*0.20}{0.5} \\\\\\h'=\frac{0.025}{0.5} =0.052m\\\\\\h'=5.2cm[/tex]

Breaking a bar magnet in half results in two smaller magnets each with a north and south pole, illustrating that magnets always have two poles and magnetic 'monopoles' do not exist in isolation.

If you break a bar magnet in half, the result is not a separation of magnetic poles, but rather the creation of two smaller magnets, each with its own north and south pole. This outcome underscores a fundamental principle of magnetism: magnets are always dipolar, meaning they have two poles. The behavior of magnets when broken can be traced to the atomic level, where even the tiniest particles that exhibit magnetism possess a north and south pole.

Unlike electric charges, which can exist in isolation, magnetic 'monopoles' have not been observed. Instead, the magnetic properties of materials like iron derive from the orientation of electrons' rotation, offering a microscopic explanation for why severing a magnet produces smaller dipoles rather than isolated poles.

Answer:

The step down transformer reduces this voltage to 6 volts. The string wire of the sonometer is a non-magnetic metallic wire like brass or copper. A horse shoe magnet is placed at the middle of the sonometer wire so that the magnetic field is applied perpendicular to the sonometer wire in a horizontal plane.

Hope this helps!

In a sonometer, the purpose of a magnet is to create a magnetic field that interacts with an electrically charged wire to induce vibrations and produce sound.

The purpose of a magnet in a sonometer is to provide a magnetic field which can interact with an electric current through a wire or a strip that is stretched across the sonometer. When alternating current flows through the wire, it oscillates due to the magnetic force exerted by the magnet. This magnetic interaction causes the wire to vibrate, producing sound waves whose frequencies are related to the tension, length, and mass per unit length of the wire.

Understanding the influence of geometric considerations and background contributions is critical for accurate measurements. A magnetometer with a second-order gradiometer design minimizes background noise and stray field effects, essential for precise studies. In this context, the sonometer can serve as a demonstrative tool for such magnetic field sensors.

Answer:

Explanation:

You add resistances to get the total R in a series circuit.

R =  R1 + R2 + R3

R = 8 + 12 + 28

R = 48 ohms.

Next the current is the same going through each of the resistors.

I = E / R

I = 24 / 48

I = 1/2

I = 0.5

But you are asked for power in each resistor

P = I * I*R

P = I^2 * R1

P1 = (0.5^2) * 8

P1 = 1/4 * 8 = 2 watts

P2 = I^2 * R2

P2 = (1/2)^2 * 12

P2 = 3 watts

P3 = 1/4 * 28

P3 = 7 watts.

=====================

The total power can be found two ways: either by just adding what you got or using voltage.

P = E * I

P = 24 * 1/2 = 12 watts.

Now we can try it the other way.

P = P1 + P2 + P3

P = 2 + 3 + 7

P = 12 watts

Both answers agree.

Answer:

Power in R1 = 2 watts

Power in R2 = 3 watts

Power in R3 = 7 watts

Compute the total power delivered to the circuit by the 24-volt battery:  12 watts

Negative celestial declinations are all positions in the sky that are directly over south surface latitudes.

Sirius is SOUTH of the celestial equator.

During the course of a year, it traces a circular path directly over the parallel of 16° South latitude, taking it over Peru, La Paz in Bolivia, St. Helena island in the Atlantic, Namibia, Angola, Zambia, Mozambique, Malawi, Madagascar, Australia, French Polynesia, American Samoa, and the Pacific Ocean.

Answer:

Sirius is *SOUTH* of the celestial equator :))

Explanation:

its the correct answer on the test,,, good luck !! :3

Answer:

588 N

Explanation:

Since the 60 kg is moving at a constant velocity there is no acceleration. In order for the system to be balanced, both the normal force and the force of gravity must be equal. In this case the man has a mass of 60 kg. So to find the force you multiply mass by gravitys constant (9.81). And you end up with an answer of 588.6 but I rounded to 588.

The reactive force acting on the man by the elevator is about 588 Newton

Newton's second law of motion states that the resultant force applied to an object is directly proportional to the mass and acceleration of the object.

[tex]\large {\boxed {F = ma }[/tex]

F = Force ( Newton )

m = Object's Mass ( kg )

a = Acceleration ( m )

Let us now tackle the problem !

Given:

mass of the man = 60 kg

velocity of the lift = 5 m/s

Unknown:

reactive force = N = ?

Solution:

We will use Newton's 2nd law formula for this problem.

[tex]\Sigma F = ma[/tex]

[tex]N - w = ma[/tex]

[tex]N - mg = ma[/tex]

[tex]N - 60(9.8) = 60(0)[/tex] → constant velocity ⇒ a = 0

[tex]N = 0 + 588[/tex]

[tex]N = 588 ~ Newton[/tex]

Grade: High School

Subject: Physics

Chapter: Dynamics

Keywords: Gravity , Unit , Magnitude , Attraction , Distance , Mass , Newton , Law , Gravitational , Constant