Look at the graph. How many minutes is the sample COMPLETELY a liquid?

Answer:

Answer:

The difference between (a) and (b) is the deviation caused by the actual pulley not being a perfect solid disk. In (a), we took into account the additional frictional torque and calculated the more accurate moment of inertia. In (b), we made a rough estimate assuming the pulley to be a solid disk, which disregards factors such as the mass distribution and the presence of the axle. The difference between the two values is the deviation caused by these factors.

The volume of the gas at 101.3 kPa would be approximately 651.25 cm³.

To calculate the change in volume of a gas from an initial pressure to a final pressure, we can use Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Boyle's law can be expressed as:

P1 * V1 = P2 * V2

Where:

P1 = Initial pressure (80.8 kPa)

V1 = Initial volume (817 cm³)

P2 = Final pressure (101.3 kPa)

V2 = Final volume (to be calculated)

Let's plug in the values into the equation and solve for V2:

80.8 kPa * 817 cm³ = 101.3 kPa * V2

V2 = (80.8 kPa * 817 cm³) / 101.3 kPa

V2 ≈ 651.25 cm³

Therefore, the volume of the gas at 101.3 kPa would be approximately 651.25 cm³.

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The airplane will strike the ground at a horizontal distance of 490 meters.

To determine how far the airplane will strike on the ground, we need to consider the horizontal distance traveled by the airplane during its flight.

The horizontal distance traveled by an object can be calculated using the formula:

Distance = Speed × Time

In this case, the speed of the airplane is given as 100 meters per second and the time it takes to cover the distance of 490 meters is unknown. Let's denote the time as t.

Distance = 100 m/s × t

Now, to find the value of time, we can rearrange the equation as follows:

t = Distance / Speed

t = 490 m / 100 m/s

t = 4.9 seconds

Therefore, it takes the airplane 4.9 seconds to cover a horizontal distance of 490 meters.

Now, to calculate the distance on the ground where the airplane will strike, we can use the formula:

Distance = Speed × Time

Distance = 100 m/s × 4.9 s

Distance = 490 meters

It's important to note that this calculation assumes a constant speed and a straight flight path. In reality, various factors such as wind conditions, changes in speed, and maneuvering can affect the actual distance traveled by the airplane.

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The current flowing in the 2Ω and 1Ω is 1.14 A and the current flowing in the 3Ω and 4Ω is 0.286 A.

The value of the current in each resistor is calculated by applying Kirchoff voltage law as follows;

The total voltage in loop 1 is calculated as;

2 + 4 - I₁R₁ - (I₁ - I₂)R₂ - I₁R₃ = 0

6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0

The current flowing in loop 2 is calculated as;

I = V/R

I₂ = ( 6 V - 4 V ) / (3 + 4)

I₂ = 0.286 A

The value of the current flowing in loop 1 is calculated as;

6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0

6 - 2I₁ - 3(I₁ - 0.286) - 1₁ = 0

6 - 3I₁ - 3₁ + 0.858 = 0

-6I₁ = -6.858

I₁ = 6.858 / 6

I₁ = 1.14 A

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Answer:

To the extent that Stellar spectra look like blackbodies, the temperature of a star can also be measured amazingly accurately by recording the brightness in two different filters. To get a stellar temperature: Measure the brightness of a star through two filters and compare the ratio of red to blue light.

Explanation:

The magnitude of a momentum of a  motorcycle of a mass of 100kg at rest stage is 0kg-m/sec and momentum of a motorcycle is 4000kg-m/sec when it travels with 40m/sec speed.

We know very well that momentum is defined  as the quantity of the motion of the body.

Momentum is represented by the product of mass and velocity, or in other words p=mass × velocity

Momentum is called as a vector quantity. It means it has proper magnitude and proper direction.

From momentum, impulse is also calculated.

At rest stage velocity of motorcycle is 0m/sec

Therefore, momentum=100×0=0Kg-m/sec

Now, when motorcycle is moving with speed 40m/sec, then momentum is

=>p=100kg×40m/sec

=>p=4000kg-m/sec

There are various laws in physics  which are derived by the conservation of momentum.

Hence, magnitude of momentum are 0kg-m/sec and 4000kg-m/sec.

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The letter that represents the various descriptions is as follows:

5.) Angle of incidence: B

6.) Object: D

7.) Plain mirror:A

8.) Reflection: E

9.) Angle of reflection: C

10.) Normal: F

The law of reflection in a plain mirror states that the angle of reflection is equal to the angle of incidence.

The diagram explains the law of reflection on a plain mirror because it shows the reflection of the object D as E after creating an angle of incidence B on the plane mirror surface A which is equal to the angle of reflection C.

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The little number you see to the right of the symbol for an element is called a subscript. That number indicates the number of atoms of that element present in the compound.

Nuclear Power plant are used to generate electrical energy.

In nuclear power plant, nuclear fission occurs.

Nuclear fission is a process in which one atom splits into two atoms.

During this process, large amount of heat energy is released.

This heat energy is used to generate steam.

Turbine starts moving due to the steam.

This turbine converts mechanical energy into electrical energy.

Answer:

Hello there seems to be no Images in this question but Kinetic energy is a push or a pull force which has to do with motion if you just need to know what t is. Next time be sure to add the pictures for it.

Explanation:

Thank you!

Hello the other person (#Sonichj123), was indeed correct there appears to be no picture in your question. Although there is no picture in your question, If you have another question I will be gladly to help you!

Explanation:

Thank you so much! (≥ФωФ≤)

Electric potential at point (0, 0) due to the two point charges is \(-6.84 * 10^6 volts\). We can use formula: \(V = k(q1/r1 + q2/r2)\)

To find the Electric potential at point (0, 0) due to the two point charges, we need to use the formula:

\(V = k(q1/r1 + q2/r2)\)

where V: electric potential, k: Coulomb's constant (\(8.99 * 10^9 N m^2/C^2\)), q1 and q2: magnitudes of the charges (-7.70 c and 0.778 c, respectively), and r1 and r2: distances from each charge to the point (0, 0).

Using the distance formula, we can find that r1 = 7.593 m and r2 = 10.342 m. Put values in formula:

V = \((8.99 * 10^9 N m^2/C^2)(-7.70 c/7.593 m + 0.778 c/10.342 m)\)

V = \(-7.52 * 10^6 V + 6.77 * 10^5 V\)

V =\(-6.84 * 10^6 V\)

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When a negatively charged conductive rod is brought close to a lightweight Styrofoam ball suspended from the ceiling by insulating threads (see Figure A), the electrons in the ball are repelled by the rod's negative charge.

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Classical mechanics describes the motion of objects on a macroscopic scale, while quantum mechanics deals with the behavior of particles on a microscopic scale. Classical mechanics is deterministic, meaning that it predicts precise outcomes based on initial conditions, while quantum mechanics is probabilistic, providing probabilities of different outcomes. Classical mechanics follows the principle of causality, where every effect has a specific cause, whereas quantum mechanics introduces inherent uncertainty and wave-particle duality. Classical mechanics is well-suited for describing everyday objects, while quantum mechanics is necessary to explain the behavior of particles at the atomic and subatomic levels.

~~~Harsha~~~

The force formula can be rewritten  to solve the acceleration as:

acceleration = force/mass.

Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).

The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

From Newton's 2nd law of motion, we can write that:

Force = mass × acceleration

⇒ acceleration = force/mass.

Hence, the force formula can be rewritten  to solve the acceleration as:

acceleration = force/mass.

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Answer:

Net force = 11340 N

Explanation:

Given that,

Mass of an automobile, m = 2100 kg

Acceleration of the automobile, a = 5.4 m/s²

We need to find the net force required for the automobile. The net force is the product of mass and acceleration. It can be given by the formula as follows :

\(F=ma\\\\F=2100\ kg\times 5.4\ m/s^2\\\\F=11340\ N\)

So, the net force is 11340 N.

Answer:

25 m/s to south

Explanation:

Average velocity is total displacement over total time. Mathematically, it can be expressed as:

\(\displaystyle{\vec{v}_{\sf{average}} = \dfrac{\vec{s}_{\sf{total}}}{t_{\sf{total}}}}\)

Where \(\displaystyle \vec v\) is velocity, \(\displaystyle \vec s\) is displacement and \(\displaystyle t\) is time. Displacement is change in position.

The position changes from 0 meter to 300 meters north. Then it changes from 300 meters north to 350 meters south. Therefore:

\(\displaystyle{\vec{s}_1 = 300 \ \, \sf{meters} \ \, \sf{north}}\\\\\displaystyle{\vec{s}_2 = 350 \ \, \sf{meters} \ \, \sf{south}}\)

The direction is opposite to each others for 300 meters north and 350 meters south.

Since you have more displacement to south more than you have to north. The direction will be in south and you'll have total displacement of 350 - 300 = 50 meters to south.

Therefore:

\(\displaystyle{\vec{s}_{\sf{total}} = 50 \ \, \sf{meters} \ \, \sf{south}}\)

Within 2 minutes, you are able to travel displacement of 50 meters to south. Therefore, substitute in the formula:

\(\displaystyle{\vec{v}_{\sf{average}} = \dfrac{50}{2}}\\\\\displaystyle{\vec{v}_{\sf{average}} = 25 \ \, \sf{m/s} \ \, \sf{south}}\)

Answer:

-2

Explanation:

The points are (0, 3) and (3, -3)

If you subtract 3-(-3) you get 6

If you subtract 0-3 you get -3

6/-3 is equal to -2

We can measure the flow rate of various liquid by pouring the liquid down an incline and time how long it takes each one to reach the bottom.

option C.

The flow rate of a liquid is how much fluid passes through an area in a particular time.

Flow rate can be articulated in either in terms of velocity and cross-sectional area, or time and volume. As liquids are incompressible, the rate of flow into an area must be equivalent to the rate of flow out of an area.

Generally, the best equipment to measure the flow rate of a liquid is flow meters. In the absence of flow meters, we can other methods such as the one given in the options.

We can pour the various liquid down an incline and time how long it takes each one to reach the bottom.

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Answer:

e

Explanation:

Answer:

???????

Explanation:

????????

A. The average speed you can use to pull the safe is 1.02 m/s

B. The time needed to pull the safe up is 17.65 s

First, we shall obtain the force. This is shown below:

F = mg

F = 60 × 9.8

F = 588 N

Finally, we shall obtain the average speed. Details below:

Power = force × average speed

600 = 588 × average speed

Divide both sides by 588

Average speed = 600 / 588

Average speed = 1.02 m/s

The time needed to pull the safe up can be obtained as follow:

Time = Total distance / average speed

Time = 18 / 1.02

Time = 17.65 s

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Complete question:

You know you can provide 600 W

of power to move large objects. You need to move a 60-kg

safe up to a storage loft, 18 m

above the floor.

Part A

With what average speed can you pull the safe straight up?

Part B

What is the time needed to pull the safe up?

Change in kinetic energy after explosion is 32.9 x 10⁵J.

Mass of the first piece, m₁ = 5 kg

Mass of the second piece, m₂ = 12 kg

Mass of the third piece, m₃ = 8 kg

Velocity of the rock initially, v = 2 m/s

Velocity of the second piece, v₂ = 400 m/s

Velocity of the third piece, v₃ = 9 m/s

According to conservation of momentum,

mv = m₁v₁ + m₂v₂ + m₃v₃

Therefore velocity of the first piece,

v₁ = (mv - m₂v₂ - m₃v₃)/m₁

v₁ = [(25 x 2) - (12 x 400) - (8 x 9)]/5

v₁ = -964.4 m/s

Kinetic energy of the rock initially,

KE = 1/2 mv²

KE = 1/2 x 25 x 4

KE = 50 J

Kinetic energy after explosion,

KE' = 1/2(m₁v₁²+ m₂v₂²+ m₃v₃²)

KE' = 1/2[(5 x 93 x 10⁴) + (12 x 16 x 10⁴) + (8 x 81)]

KE' = 328.5 x 10⁴

Change in kinetic energy = KE' - KE = 32.9 x 10⁵J

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Answer: 3.26 * 10^3

Explanation:

If the researcher wants to measure internal consistency in a test , then the best method to use in measuring the internal consistency is Split Half Reliability .

The Split Half Reliability is defined as a method which is used to measure the internal consistency of a test by splitting the test into two halves and then calculate the correlation between the scores on the two halves of the test .

In this case, the researcher wants to measure the internal consistency of a test that measures two different constructs (self-esteem and depression) without subdividing the items into the two construct groupings.

Since the test measures two different constructs, the split half reliability may not be able to provide an accurate estimate of internal consistency, because  the correlation between the scores on the two halves may be influenced by the different constructs being measured.

The given question is incomplete , the complete question is

A researcher wants to measure internal consistency in a test that measures two different constructs (self-esteem and depression) without subdividing the items into the two construct groupings. What would be the best method to use in measuring internal consistency ?

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The sprinter uses starting blocks to enhance running. When the sprinter pushes on the block the block push in turn with the same force and helps the runner to move forward. Hence, they are using Newton's third law of motion.

Newton proposed three laws of motion. The first law describes the inertia of an object to stay in its current state until an external force acts on it. Second law of motion states that, the force exerted on an object is the product of its mass and acceleration.

Newton's third law of motion states that , for every action, there is an equal and opposite reaction. The sprinters uses the starting blocks to start running where, they push against the block results in a push with an equal force from the block.

This opposite force from the block helps to make the runner run fastly. Hence, Newton's third law is used here.

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Explanation:

b) a fixed shape is describing a solid state

Answer:

36.87°

Explanation:

The frog is making a projectile motion, so the time of flight for each jump is calculated as

Where vo is the initial velocity, g is the gravity and θ is the angle. Solving for sinθ, we get

Replacing t = 0.60 s, v0 = 5.0 m/s, and g = 10 m/s², we get

Therefore, the angle is 36.87°

Take left to be the negative direction, and right to be positive.

The receiver's position at time t, taking his starting position to be the origin, is

(10 m/s) t

while the tackler's position is

40 m + (-6 m/s) t

The two collide when their positions are equal:

(10 m/s) t = 40 m - (6 m/s) t

(16 m/s) t = 40 m

t = (40 m) / (16 m/s)

t = 2.5 s

In this time, the receiver covers a distance of

(10 m/s) (2.5 s) = 25 m

Answer:

a = 1.16 m/s²

Explanation:

In order to find the rate of acceleration of the ball, we will use third equation of motion, as follows:

2as = Vf² - Vi²

where,

a = rate of acceleration = ?

s = distance covered by the ball = 21.9 m

Vf = Final Velocity of the ball = 7.14 m/s

Vi = Initial Velocity of the ball = 0 m/s (Since, the ball started from rest)

Therefore,

2(a)(21.9 m) = (7.14 m/s)² - (0 m/s)²

a = (50.97 m²/s²)/(43.8 m)

a = 1.16 m/s²