Have you heard of any particle, which moves faster than light? Explore the recent researches and find about it.

Answer:

1st one is: A

2nd one is: B

Answer:19

Explanation:

Answer:

Our estimate not done correctly because the width was unrealistic.

Explanation:

Given that,

Length = 6 m

Width = 0.5 m

We need to calculate the area of rectangular floor

Using formula of area

[tex]A=l\times w[/tex]

Where, l = length

w= width

Put the value into the formula

[tex]A=6\times0.5[/tex]

[tex]A=3\ m^2[/tex]

We need to find why this estimate not done correct

Using given data

We can say that,

We assume width was unrealistic.

The length of room is 6 m.

We know that,

[tex]1\ m=3.28\ feet[/tex]

So, the length would be 20 feet.

The width of room is 0.5 m.

The width of room would be 1.64 feet.

So, the area will be

[tex]A=20\times1.64[/tex]

[tex]A=32.8\ feet^2[/tex]

Hence,  Our estimate not done correctly because the width was unrealistic.

Answer:

Same weight so neither is heavier

Since their masses are equal, their weights are equal whenever they're both on the same planet.

Answer:

A vacuum was created in a glass tube by means of a pump. A feather and a gold coin (a guinea) placed inside the tube were dropped at the same time. The two bodies, despite their very different weights, reached the base of the tube together.

Explanation:

Answer: l, ll, lll, and lV

Explanation: Study island

Answer:

x = 125 [m]

Explanation:

To solve this problem we must use the following kinematics equations.

[tex]v_{f} = v_{i} - (a*t)[/tex]

where:

Vf = final velocity = 0

Vi = initial velocity = 10 [m/s]

t  = time = 25 [s]

a = acceleration [m/s2]

Note: the negative sign of the last term of the equation means that the speed decreases, that is, the body slows down.

Now replacing:

0 = 10 - (a*25)

a = 0.4 [m/s^2]

Now we must find the displacement value with the following equation and with the acceleration value found.

[tex]v_{f} ^{2} = v_{i} ^{2}-(2*a*x)[/tex]

where:

x = displacement [m]

(10)^2 = 2*0.4*x

x = 125 [m]

Answer:

D

Explanation: collaboration

Answer:

The immune system is made up of a network of cells, tissues, and organs that work together to protect the body against infection and maintain overall health. The human body is an optimal environment for pathogens, such as bacteria, viruses, fungi, and parasites to thrive. Your immune system isn't tricked by cancer, it tries to fight off the infection, as the infections gets bigger, your healthy blood cells are not able to fight off the cancer cells.

Explanation: I hope this helps, if not let me know and I will give you a different answer, though this came from my textbook.

Answer:

the answer is B

Explanation:

The atomic mass of an atom is the sum of the protons plus neutrons it has.

Answer:

A chemical reaction increase in speed with the increase of temperature.. so.. fast working machine posses more power

Answer:

density = 5000 [kg/m^3]

Explanation:

Density is defined as the relationship between mass and volume.

Now we have:

m = 100 [gr] = 0.1[kg]

V = volume = 20[cm^3]

[tex]20[cm^{3}]*1[\frac{m^{3} }{100^{3} cm^{3} } ] = 2*10^{-5}[m^{3} ][/tex]

density = 0.1 / (2 x 10^-5)

density = 5000 [kg/m^3]

Answer:5

Explanation:

Answer:

171500J

Explanation:

Given parameters:

Mass of the body  = 35kg

Maximum height = 500km

Unknown:

Potential energy of the body = ?

Solution:

The potential energy of a body is the energy at rest of a body. It is mathematically expressed as;

           P.E  = mgh

where m is the mass

           g is the acceleration due to gravity = 9.8m/s²

           h is the height of the body

Now insert the parameters and solve;

           P.E  = 35 x 9.8 x 500  = 171500J

Answer:

D

Explanation:

I just did it on apex

Answer:

The net force that acts on the sailboat has a magnitude of 217 N and is applied at an angle of 64° north of east.

Explanation:

Mechanical Force

The second Newton's law states the net force exerted by an external agent on an object of mass m is:

[tex]\vec F = m.\vec a[/tex]

Where [tex]\vec a[/tex] is the acceleration of the object. Note both the force and the acceleration are vectors. The relationship between them is the mass, a scalar.

This means the net force and the acceleration have the same direction.

The sailboat has a mass m= 350 Kg and moves at a=0.62 m/s^2. The magnitude of the net force acting on the boat is:

[tex]F=0.62 * 350=217\ N[/tex]

As stated above its direction is the same as the acceleration, thus:

The net force that acts on the sailboat has a magnitude of 217 N and is applied at an angle of 64° north of east.

The net force that acts on the sailboat has a magnitude of 217 N and is applied at an angle of 64° north of east.

Here this law of motion should be applied

We know that

F = ma

Here m means the mass

And, the a means the acceleration

Since m is 350 kg

And, a is 0.62

so the net force should be

= 350 * 0.62

= 217 N

Also the direction should be the same

hence, The net force that acts on the sailboat has a magnitude of 217 N and is applied at an angle of 64° north of east.

Learn more about force here: https://brainly.com/question/17552267

Explanation:

s = ut + 1/2at²

= 0(10) + 1/2×6.6×(10)²

= 3.3 × 100

= 330 m

Answer:

1. B. Impulse = Force × Time

2. A. The momentum of each ball changes, and the total momentum stays the same

3. -55 kg·m/s

4. B. 3.5 kg

5. C. 6.3 m/s

Explanation:

1. The impulse is the momentum change of an object due to a force applied for a given period

2. Given that the objects collide, and the force of the 3 kg mass moving with 24 kg·m/s acts on the 1 kg mass while the total momentum is conserved;

The stationary ball of mass 1 kg begins to moves at certain velocity after collision and therefore changes momentum, while the velocity of the ball of mass 3.0 kg reduces and the total combined momentum of the two balls in the closed system remains the same

3. By the principle of conservation of linear momentum, we have;

The sum of the momentum before the collision = The sum of the momentum after collision

Given that the objects move together after the collision, the total momentum is therefore;

Total momentum = 110 kg·m/s + -65 kg·m/s + -100 kg·m/s = 110 kg·m/s - 65 kg·m/s - 100 kg·m/s  = -55kg·m/s

4. Given that the final velocity of the two objects (m₁ + m₂) combined = 50 m/s

Where;

m₁ = The mass of the first object

m₂ = The mass of the second object

The total momentum of the system = 250 kg·m/s

From momentum = Mass × Velocity, we have;

Mass = Momentum/Velocity = 250 kg·m/s/(50 m/s) = 5.0 kg

The mass (m₁ + m₂) = 5.0 kg

Given that m₁ = 1.5 kg, we have;

m₂ = 5.0 kg - m₁ = 5.0 kg - 1.5 kg = 3.5 kg

The mass of the second object = 3.5 kg

5. The mass of the cue stick = 0.5 kg

The velocity of the cue stick = 2.5 m/s

The mass of the ball = 0.2 kg

The initial velocity of the ball = 0 m/s

Given that total initial momentum = Total final momentum, we have;

0.5 kg × 2.5 m/s + 0.2 kg × 0 = 0.2 kg × v + 0.5 kg × 0

0.5 kg × 2.5 m/s = 0.2 kg × v

v = (0.5 kg × 2.5 m/s)/(0.2 kg) = 6.25  m/s ≈ 6.3 m/s

Answer:

-3m/s²

2400N

Explanation:

Given parameters:

Mass of tram  = 800kg

Time taken   = 6s

Constant speed  = 18m/s

Unknown:

deceleration  = ?

force on brake = ?

Solution:

Deceleration is the opposite of acceleration. This is the rate of change of velocity with time;

    Deceleration  = [tex]\frac{V - U}{t}[/tex]

V is the final velocity = 0m/s

U is the initial velocity  = 18m/s

t is the time taken

   Deceleration  = [tex]\frac{0-18}{6}[/tex]  = -3m/s²

Force needed to to stop the tram;

        Force  = mass x acceleration

   Insert parameters and solve;

        Force  = 800 x 3  = 2400N

Answer:

C, 1800kg/s

Explanation:

You multiply the mass (300) by the change in the two velocities (6-0=0). Then you’ll get 1800.. sorry if I’m wrong

[tex] \sf• \: There \: is\: a \: circuit \: with\: 15 \: amps. \: (bedroom) \: of \: current \: and \: a \: bedroom \: light \: with \: 12\: ohms\: of \: resistance.[/tex]

[tex] \\ [/tex]

[tex] \sf{• \: The \: Voltage\: of\: the\: circuit. }[/tex]

[tex] \\ [/tex]

[tex] \huge\bf{ \underline{ Solution:- }}[/tex]

[tex] \sf According \: to \: the \: question, [/tex]

[tex] \sf• \: Current \: (I) = 15 \: Amps.[/tex]

[tex] \sf• \: Resistance \: (R) = 12 \: Ω[/tex]

[tex] \sf{We \: know \: that, }[/tex]

[tex] \bf \red{ \bigstar{ \: V = IR }}[/tex]

[tex] \rightarrow \sf V =15 \times 12[/tex]

[tex] \rightarrow \sf V =180[/tex]

[tex] \\ [/tex]

[tex] \sf \purple{Therefore, \: the \: voltage \: of \: the \: circuit \: is \: 180 \: v \: .}[/tex]

Considering the Ohm's law, the voltage of a circuit with 15 amps (bedroom) of current and a bedroom light with 12 ohms of resistance is 180 volts.

Current is the physical quantity that expresses the amount of electricity that flows through a conductor in the unit of time and is measured in amperes

The voltage is the difference that exists between the electrical charge that leaves the source and with which it finally reaches the end of the circuit. It is expressed in volts.

Resistance is the difficulty that a circuit opposes to the passage of a current. They are measured in ohms.

Ohm's law establishes the relationship between current, voltage, and resistance in an electrical circuit. This law establishes that the current through a circuit is directly proportional to its voltage or voltage and inversely proportional to the resistance it presents.

Mathematically Ohm's law is expressed as:

[tex]I=\frac{V}{R}[/tex]

Where I is the intensity that is measured in amps (A), V the voltage that is measured in volts (V); and R is the resistance measured in ohms (Ω).

In this case, you know:

Replacing in Ohm's law:

[tex]15 amps=\frac{V}{12 ohms}[/tex]

Solving:

V=  15 amps× 12 ohms

V=180 volts

In summary, the voltage of a circuit with 15 amps (bedroom) of current and a bedroom light with 12 ohms of resistance is 180 volts.

Learn more about the Ohm's law:

Answer:

Vf = 68.67[m/s]

Explanation:

To solve this problem we must use the following kinematics equation:

[tex]v_{f} = v_{i}-(g*t )[/tex]

where:

Vf = final velocity [m/s]

Vi = initial velocity = 0

g = gravity =  - 9.81 [m/s2]

t = time = 7 [s]

Vf = 0 - (-9.81*7)

Vf = 68.67[m/s]

If she is spinning on the spot she is not travelling anywhere so her distance and displacement are zero.

Physics words like distance and displacement are crucial to understand right because they are frequently misunderstood.

Displacement, a vector quantity, is the shortest path in a straight line between the starting position and the final position. Distance is a scalar quantity, measuring the total distance traveled by an object.

A vector quantity is different from a scalar quantity in that a vector quantity has directional information while a scalar quantity is just a set of integers. A variable with "half-arrows" above it is a vector quantity.

Therefore, If she is spinning on the spot she is not travelling anywhere so her distance and displacement are zero.

To learn more about Displacement, refer to the link:

https://brainly.com/question/30087445

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Answer:

An acceleration of 5m/s^2 means that the velocity of a body is increasing by 5m/s per second in a certain direction

Explanation: