A 0.05 kg meter stick is balanced at its midpoint (50.0 cm). Then 0.1 kg and 0.2 kg objects are hung with a light string from the 10 cm point and the 70 cm point.

When the voltage across the resistor is quadrupled and its resistance is decreased to one-fifth of its initial value, the current in the resistor rises by a factor of eight (20/2=8).

Ohm's Law states that a resistor's resistance is inversely proportional to its current flow, which is directly proportional to the voltage applied across it. The mathematical formula for Ohm's Law is I = V/R, where I stands for current, V for voltage, and R for resistance.

In this case, the voltage across the resistor is multiplied by four, or quadrupled. The resistance is simultaneously decreased to one-fifth of its initial value, suggesting that it is divided by five.

Find the new current in the resistor using these modifications to Ohm's Law. The new current (I') can be computed as follows because the voltage has increased fourfold (4V) and the resistance has fallen to one-fifth (R/5).

I' = (4V)/(R/5) = 20V/R.

Simplifying the equation:

I' = (20/R)V.

The new current (I'), which is represented by V/R, can be written as I' = 20I.

Therefore, when the voltage across the resistor is quadrupled and its resistance is decreased to one-fifth of its initial value, the current in the resistor rises by a factor of eight (20/2=8).

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Answer:

C.

Explanation:

Answer:

733.9× 2.4

1761.36

Explanation:

The airplane refuels between city A and continues on to city B. It travels at an average speed of 733.9km/h. If the trip takes 2.4 hours, what is the flight distance between city A and city B?

Answer:

imma have to come back to you on that one

Answer:

The Sun is at the center of the solar system and the planets move around it.

Explanation:pluto/edmentum

Answer:

Scientific theories are explanations of some aspect of the natural world based on repeated observations.

Hope this helps!!!!

Answer:

The way that scientists use the word 'theory' is a little different than how it is commonly used in the lay public," said Jaime Tanner, a professor of biology at Marlboro College. "Most people use the word 'theory' to mean an idea or hunch that someone has, but in science the word 'theory' refers to the way that we interpret facts.

Explanation:

Jim Crow laws was the legal measure which allowed whites in southern states to keep blacks from voting after reconstruction ended.

These were the state and local laws which enforced racial segregation in the Southern part of the United States.

Due to this laws, whites in southern states kept blacks from voting after reconstruction ended.

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There are infinitely many possible values for the velocities of A and B after the collision, as long as they satisfy the condition v₁= -2v₂

To solve this problem, we can apply the principle of conservation of momentum and kinetic energy in an elastic collision.

The total momentum before the collision is given by:

Initial momentum = mass of A * velocity of A + mass of B * velocity of B

Initial momentum = (2 kg)(50 m/s) + (4 kg)(-25 m/s)

Initial momentum = 100 kg·m/s - 100 kg·m/s

Initial momentum = 0 kg·m/s

Since the total momentum before the collision is zero, the total momentum after the collision must also be zero due to the conservation of momentum.

Let the velocities of A and B after the collision be v₁ and v₂, respectively. We can set up the equation:

Final momentum = mass of A * velocity of A + mass of B * velocity of B

Final momentum = (2 kg)(v₁) + (4 kg)(v₂)

Since the total momentum after the collision is zero, we have:

0 = (2 kg)(v₁) + (4 kg)(v₂)

Simplifying the equation gives us:

2v1 = -4v2

v1 = -2v2

Now we can solve for the velocities v₁ and v₂. Substituting the relationship v1 = -2v2 into the equation, we get:

0 = (2 kg)(-2v₂) + (4 kg)(v₂)

0 = -4v₂ + 4v2

0 = 0

Since the equation simplifies to 0 = 0, it means that any value of v₂ will satisfy the equation.

Therefore, there are infinitely many possible values for the velocities of A and B after the collision, as long as they satisfy the condition v1 = -2v₂

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The piece of evidence that suggests that the inner planets were formed from the same rotating cloud of gas and dust is that the planets orbit the sun in the same direction and in the same plane

Smaller planets like Mercury, Venus, Earth, and Mars are considered inner planets. Mercury is thought to be the smallest inner planet, with Earth being the largest. The vastly larger outer planets, such as Jupiter, Saturn, Uranus, and Neptune, are the opposite.

A route that an object or planet in space follows around another body is referred to as an orbit. Moons are satellites that orbit many planets. A man-made satellite is also possible, such as the International Space Station.

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Answer:

D) v= 6.4 m/s a=10m/s^2

Explanation:

At top vnet= ucos (theta)

= 10 cos (50)

=10× 0.64=6.4m/s

Acc will be g (10m/s^2)

•At top point vy=0 and vx=ucos (theta)

Horizontal vel always remain same.

Answer:6m/s

Explanation:as you can see before twenty seconds there was no change in speed,but between twenty to thirty seconds,the speed changed from 0m/s to 6m/s,so change in speed is 6m/s.

The speed of an object between 20 and 30 seconds shown in the graph is 70 m/s.

Given:

Time, ΔT = 30-20 = 10s

Acceleration, a = 7 m/s²

The speed can be computed from the acceleration and time. The standard unit of velocity is meters per second.

For the given case, the speed can be computed from the acceleration and time given in the graph.

The speed is given as:

a =  v/t

v = at

v = 7×10

v = 70 m/s

Hence, the speed of an object between 20 and 30 seconds shown in the graph is 70 m/s.

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Answer:

1.1259*10^9 Newton per Columb

Explanation:

the magnitude of the electric field intensity can be calculated using the expresion below;

E=Kq/r^2

Where k= constant

q= electric charge

r=distance= 2cm= 20*10^-2m( we convert to m for unit consistency

:,K=59*10^9 Columb

If we substitute the value into above formula we have

E=(9*10^9)*(5*10^-3)/(20*10^-2)^2

=1.1259*10^9 Newton per Columb

Therefore,the magnitude of the electric field intensity in vacuum at a distance of 20 cm is 1.1259*10^9 Newton per Columb

The 11 W device is likely to burn out when the switch is turned on, due to the higher voltage it will be subjected to compared to its rated voltage. It is important to ensure that the devices used in a circuit have the appropriate voltage rating to avoid damage or failure.

When two devices with different power ratings are connected in series, the voltage across each device is divided according to their power ratings. In this case, the two devices are rated 22 W and 11 W, respectively, and are connected in series across 440 V mains. The voltage across each device can be calculated using the formula V = P/I, where V is the voltage, P is the power rating, and I is the current.

For the 22 W device, the voltage across it is V = P/I = 22/0.1 = 220 V. For the 11 W device, the voltage across it is V = P/I = 11/0.1 = 110 V. Therefore, the 22 W device has a voltage rating of 220 V, which is the same as the voltage of the mains, and the 11 W device has a voltage rating of 110 V.

When the switch is turned on, the voltage across the two devices will be the same, which is 220 V. Therefore, the 22 W device will operate normally, but the 11 W device will be subjected to a higher voltage than its rated voltage. As a result, the 11 W device is likely to burn out before the 22 W device.

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Answer:

definition of matter is that matter takes up space and has mass

The dryness fraction is 0.96. Using steam tables the enthalpies at points 2, 3, and 4 can be calculated as 2936.4 kJ/kg, 2892.3 kJ/kg, and 1039.2 kJ/kg, respectively. The value of q is found to be 1438.3 kJ/kg.

a) 0.2, b) 2687 kJ/kg, c) 0.16 kJ/kg.K, d) 32%, e) 2549.52 kJ/kgPart (a): The steam is superheated at 300°C and 3 MPa, using steam tables it can be seen that the dryness fraction is 0.96.Part (b): This can be calculated using the formula shown below. The net work done by the turbine is given as follows: Net work = m (h1 - h2) + m (h3 - h4) Where m is the mass of the steam entering the turbine and h1, h2, h3, and h4 are the enthalpies at the different points in the cycle.h1 is given as 3478 kJ/kg, and using steam tables the enthalpies at points 2, 3, and 4 can be calculated as 2936.4 kJ/kg, 2892.3 kJ/kg, and 1039.2 kJ/kg, respectively.

Substituting the values in the formula gives the answer as 2687 kJ/kg.Part (c): Heat transfer per unit mass of steam to the boiler can be calculated using the formula shown below:q = h1 - h4 The value of q is found to be 1438.3 kJ/kg. Part (d): The thermal efficiency of the cycle can be calculated using the formula shown below: Efficiency = Net work output/ Heat inputHeat input can be calculated as follows: Heat input = m (h1 - h4) + m (h3 - h2) The value of heat input is calculated to be 4485.4 kJ/kg Substituting the values in the formula gives the answer as 32%.Part (e): The heat transfer to cooling water passing through the condenser is given as follows:q = m (h4 - h5)Where h4 is 1039.2 kJ/kg and h5 is 48.72 kJ/kg. The value of q is calculated to be 2549.52 kJ/kg.

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Answer:

this is the answer the required questions

hope you like this

The time rate of increase of electric field is also zero. Hence, the answer is:  \($\frac{dE}{dt} = 0$\)

Assuming there is a constant potential difference between the plates of a capacitor, the time rate of increase of electric field between the plates can be calculated using the following formula:

\($E = \frac{V}{d}$\)

where E is the electric field, V is the potential difference, and d is the distance between the plates.

In this case, the plate separation is given as 4.00 mm. We can assume that the potential difference between the plates is constant. Therefore, the time rate of increase of electric field can be calculated by taking the derivative of the electric field with respect to time:

\($\frac{dE}{dt} = \frac{1}{d}\frac{dV}{dt}$\)

Since the potential difference is constant, the derivative of potential difference with respect to time is zero. Therefore, the time rate of increase of electric field is also zero.

Hence, the answer is:  \($\frac{dE}{dt} = 0$\)

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Answer: A The more massive ball would be accelerated less by the wind gusts than the foam ball would.

Explanation:  

D: the ball can't slow wind down

C: the lighter an object the less energy is needed to move.

B: the heavier ball requires more energy to throw than the lighter ball

A: since the ball is heavier than the foam ball it take more force to make it accelerate so since the foam ball is so light it wouldn't be accelerated as much as the heavier ball

This statement is true. Not all of the potential energy of the roller coaster cars is converted to kinetic energy and back again, some mechanical energy is converted to thermal energy.

The amount of mechanical energy in the system is reduced as a result of the force of friction acting on the moving automobiles. Consequently, the mechanical energy is not wasted.

It is converted into thermal energy, which is discernible as an elevation in the track and car wheels' temperature on a roller coaster.

The coaster's kinetic energy turns back into potential energy when it climbs one of the subsequent, smaller hills after the initial lift hill.

In this manner, the track's route continuously transforms energy from kinetic to potential and vice versa.

A portion of the energy is always converted into thermal energy whenever this occurs. Friction is a source of heat energy. Frictional energy is not usable energy. It isn't put to use for labor.

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Explanation:

15. vt = vo + at

vo = 0 (at rest)

vt = 0 + (5.4)(28) = 151.2 m/s

16. vt = vo + at

vo = 15 m/s

vt = 15 + (3.5)(11) = 53.5 m/s

17. vt = vo + at

vo = 23 m/s

vt = 85 m/s

a?

85 = 23 + a(8.3)

85 - 23 = 8.3a

62 = 8.3a

a = 62/8.3 = 7.469 ≈ 7,5 m/s²

When two train cars collide, they will couple together by being bumped into each other. In this case, we have two loaded train cars moving toward one another, with the first car having a mass of 164000 kg and a velocity of 0.324 m/s, and the second car having a mass of 95000 kg and a velocity of -0.096 m/s (the minus indicates direction of motion).

To determine their final velocity after collision, we need to apply the principle of conservation of momentum. The total momentum before the collision equals the total momentum after the collision. Therefore, we have:m1v1 + m2v2 = (m1 + m2)vfwhere m1 and v1 are the mass and velocity of the first car, m2 and v2 are the mass and velocity of the second car, and vf is their final velocity.

Substituting the given values, we get:(164000 kg)(0.324 m/s) + (95000 kg)(-0.096 m/s) = (164000 kg + 95000 kg)vf53592 - 9120 = 259000 kgvfvf = (53592 - 9120) / 259000 kgvf = 0.161 m/sTherefore, their final velocity is 0.161 m/s.

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Answer: Total distance = 4π meters and the Total Displacement = 0

Explanation: 1.5 rounds around the pole = 1.5 times the circumference of the circle form by the rope.

Circumference of a Circle = 2πr

from the question the radius = 2m, hence the total circumference = 2π*2 = 4π meters.

Displacement which is distance between initial position and final position. When the horse takes one and a half rounds around the pole, it ends up back at the starting point. Hence, the displacement is zero.

The  safely removing a needle from a syringe based on safe sharps work practices is to use a needle box equipped with a needle removal device that permits the needle to fall directly into the needle box or sharps container when removed.

This method ensures that the needle is immediately disposed of in a safe manner, reducing the risk of accidental needlestick injuries. It is important to never remove the needle by twisting off the syringe directly by hand, as this can cause the needle to become dislodged and potentially cause harm. Similarly, asking a colleague to hold the syringe while you twist the needle off by hand also poses a risk. Recapping the needle with forceps before removing it by hand is also not recommended, as it increases the risk of needlestick injuries. Therefore, using a needle box equipped with a needle removal device is the safest and most effective method for removing a needle from a syringe.

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Answer:

2m/s

Explanation:

10m / 5 s

Simplify and divide.

2 m / 1 s

Answer:

The speed would be 2

Explanation:

It will take approximately 1.98 seconds for the object to hit the ground after Sandra throws it into the air with an initial vertical velocity of 38 ft/s from a platform 30 ft above the ground.

Step 1: Identify the given information.
Initial vertical velocity (v0) = 38 ft/s (upward)
Initial height (h0) = 30 ft
Final height (hf) = 0 ft (ground level)

Step 2: Use the following kinematic equation to relate the heights, initial vertical velocity, and time (t) for a falling object:
hf = h0 + v0*t - (1/2)*g*t²

Here, g is the acceleration due to gravity, which is approximately 32 ft/s² for objects near Earth's surface.

Step 3: Plug in the given values and solve for time (t).
0 = 30 + 38*t - (1/2)*32*t²

Step 4: Rearrange the equation to get a quadratic equation.
0 = -16t² + 38t + 30

Step 5: Solve the quadratic equation for t using the quadratic formula or factoring, if possible.
t ≈ 1.98 s (ignoring the negative root since time cannot be negative)

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The way that Q and W are related during the isobaric part of the overall path is that W provides energy output, while Q provides energy input; Q is larger. Option A.

A thermodynamic process called an isobaric process keeps the pressure constant. This is typically accomplished by allowing the volume to alter in size in order to balance off any pressure changes brought on by heat transfer.

Vb > Vd

W tends towards the positive. This is the energy output of the system. The pressure is constant so Q is energy input. Hence the first option is the correct one

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Question

how are q and w related during the isobaric part of the overall path from state d to state b?

1. W provides energy output, while Q provides energy input; Q is larger

2. Both W and Q provide energy input

c)5A

Explanation:

As,

\(I = \frac{P}{V} = \frac{1000}{220} = 5\)

Answer:

I think its D.....

Answer:

The resultant downward force on the top-pan balance is 0.91N.

The best answer from the options is D : The resultant downward force on the top pan balance is 0.91 N

Although your question is incomplete attached below is the complete question.

Given data :

mass of metal block = 100 g

reading on the balance = 91 g

In order to deduce the best statement we will Neglect weight while considering the force acting on the balance ( reading on the balance ). therefore the resultant downward force on the top pan will be

91 g ≈ 0.91 N  ( 91 * 0.0098 N )

hence the statement that can be deduced from this experiment is that The resultant downward force on the top pan balance is 0.91 N

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Answer:

Peach and Apple will take the same time as the gravitional pull acting on both of them is equal.

height of peach=initial velocity*time+1/2*gravitional pull*(time^2)

1.8=0*time+1/2*9.8*time^2

1.8=0+1/2*9.8*time^2

1.8=1/2*9.8*time^2

3.6/9.8=time^2

taaking value of gravitional pull approx to 10

3.6/10=time^2

0.36=time^2

0.6=time

therefore, the time taken is 0.6sec

Explanation:

The time it takes the peach to reach the ground is 0.61 sec

From the question,

We are to determine how long it would take the peach to reach the ground.

From one of the equations of kinematics for free falling objects,

We have that

\(H = ut + \frac{1}{2}gt^{2}\)

Where

H is the height

u is the initial velocity,

t is the time

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

Since the object is dropped with no velocity, then the initial velocity is 0 m/s

From the given information

H = 1.8 m

u = 0 m/s

Putting the parameters into the formula,

We get

\(1.8 = 0(t) + \frac{1}{2}(9.8)t^{2}\)

This becomes

\(1.8 = 0 + 4.9t^{2}\)

\(1.8 = 4.9t^{2}\)

Then,

\(t^{2} = \frac{1.8}{4.9}\)

\(t^{2} = 0.367347\)

∴ \(t =\sqrt{0.367347}\)

t = 0.60609 sec

t ≅ 0.61 sec

Hence, the time it takes the peach to reach the ground is 0.61 sec

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