Three forces, A, B, and C, are acting on the same object with magnitudes a, b, and c, respectively. Force A acts to the right, force B acts to the left, and force C acts downward. What is a necessary condition for the object to move straight down?

A. The magnitude of force A must be greater than the magnitude of force C, so A > C.


B. The magnitude of force A must be greater than the magnitude of force B, so a > b.


C. The magnitude of force A must be equal to the magnitude of force B, so a = b.


D. The magnitude of force C must be greater than the magnitude of forces A or B, so A < C > B.

Yes , Crystalline regions in thermoplastics help increase their strength, stiffness, and resistance to heat.

This is because the crystalline structure provides a more ordered arrangement of polymer chains, which increases the intermolecular forces and makes the material stronger.

Crystallinity in thermoplastics can be introduced by cooling the material from its molten state to its solid state, which allows the polymer chains to arrange themselves in a more ordered structure. This is known as "thermal crystallization."

Alternatively, crystallinity can be induced by stretching or orienting the material in a particular direction, which also causes the polymer chains to align themselves in a more ordered structure. This is known as "cold crystallization" or "orientation-induced crystallization."

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Answer:

what is the minimum temperature that must be maintained when holding hot soup for service?

135 degrees F

the longer the length of the string, the longer the pendulum's period.

The length of the string affects the pendulum's period such that the longer the length of the string, the longer the pendulum's period. This also affects the frequency of the pendulum, which is the rate at which the pendulum swings back and forthT = 2 Square root of L/g, where L is the pendulum's length and g is its acceleration owing to gravity, is the formula for a pendulum's period.The length of the pendulum is the distance along the thread from the point of suspension to the center of the bob. A pendulum's time period is determined by its length. A pendulum's time period grows in proportion to its length. A pendulum of a certain length has a consistent period of time.

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The producer of refrigerator compressors needs to determine the number of kanbans required for implementing a just-in-time production line to meet the demand for 150 compressors per day from a neighboring appliance manufacturer.

To calculate the number of kanbans required, we need to consider the production lead time, safety stock factor, and optimal production quantity. The production lead time is 5 days, which means that it takes 5 days to produce a batch of compressors once the production process starts.

The safety stock factor is 17%, indicating that the producer wants to maintain an additional 17% of the daily demand as safety stock to mitigate any unforeseen fluctuations. The optimal production quantity is 95 units, which is the batch size that minimizes setup costs.

To determine the number of kanbans, we first need to calculate the total demand during the production lead time. Since the demand is 150 compressors per day and the lead time is 5 days, the total demand during the lead time is 150 compressors/day * 5 days = 750 compressors. Adding the safety stock, the total demand becomes 750 compressors + (17% * 150 compressors) = 750 compressors + 25.5 compressors = 775.5 compressors.

Next, we divide the total demand by the optimal production quantity to get the number of kanbans required. The number of kanbans is calculated as 775.5 compressors / 95 compressors per kanban = 8.16 kanbans. Since we cannot have a fraction of a kanban, we round up to the nearest whole number. Therefore, the producer of compressors requires 9 kanbans to meet the demand of 150 compressors per day from the neighboring appliance manufacturer.

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The complete question is:

A producer of refrigerator compressors wants to implement a just-in-time production line to support demand from a neighboring appliance manufacturer. Demand from the appliance manufacturer is for 150 compressors a day. The production lead time is 5 days and the producer wants to have a 17% safety stock factor. This producer has also cut setup costs such that the optimal production quantity is 95 units. How many kanbans does this producer of compressors require?

Answer:

The correct answer is option D, Using an Electric mixer ( i hope this is the correct answer to what you are talking about because you didn't have any options but i gave out almost the same question to my students.)

Explanation:

Physical fitness is assured by activities in which our body is doing some kind of physical movements or exercise. In case of “walking to work “ the body is compelled to move or walk, in case of “carrying boxes up and down stairs” lot of physical work is done in both carrying the boxes and moving up and down the stairs, in the same way in case of “shoveling snow” some physical efforts are required to shovel the snow. But in case of using a  electric mixer, the only work being done is the “pressing of ON/OFF button”. Thus , "using an electric mixer" will have the LEAST effect on your level of physical fitness

The energy output from the car is 15125 J and the input energy is given 50000 J. Thus, the efficiency of the car is 30.25 %.

The efficiency of an engine is the ratio of its energy output to the energy input multiplied by 100. The efficiency of a heat engine can be found similarly using the input heat and output heat.

Given the mass of the car is 1000 Kg and it is accelerated to 5.5 m/s. Therefore the kinetic energy output is is calculated as follows:

KE = 1/2 mv²

     = 1/2  1000 kg × (5.5 m/s)²

     =  15125 J

The input energy is 50000 J. Therefore, the energy efficiency is :

efficiency = output energy / input energy × 100

                = ( 15125 J/ 50000J ) × 100

                = 30.25 %

Hence, the energy efficiency of the car is 30.25 %.

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Answer:

14

Explanation:

the left top is protons

hope this helps :)

The weight of the hawk is found to be 25 N.

The tension is the force that acts on the wire. Given the fact the we are told in the question that a  hawk sits on a telephone wire. If the wire dips so that it makes a 30 degree angle with the horizontal, and the tension in the wire is 25 N.

The image that depicts this problem have been attached to this solution. Now we have from the image that we have attached to this answer;

W = 2T sin θ

W = 2 * 25 * sin 30

W = 2 * 25 * 0.5

W = 25 N

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Answer:

D. μs = Fs/Fn

Explanation:

The static friction coefficient, is always less than 1, for this reason, the friction force will always be less than the force of the body weight.

Answer:

D is correct. I just did it!!

Explanation:

The cooking smoker works by the convection type of heat transfer to cook the meats.

A cooking smoker is a useful device used for cooking meats, and it works by the convection type of heat transfer.

This smoker works by allowing the warm air filled with smoke to rise to the meat, while the cooler air sinks closer to the fire.

In the convection type of heat transfer, the transfer of heat energy between a surface and a fluid, either liquid or gas, that is in motion. It results in the heating up of the fluid by the hot surface.

This then makes the hot fluid rise and the cooler fluid sink, thus resulting in the transfer of heat energy.In the smoker, heat transfer is dependent on convection currents.

As the fire burns, the smoke heats up and is then carried through the smoker to the meat.

The heat then begins to transfer from the smoke to the meat surface by means of convection, thereby cooking the meat with a smoky flavor.

Summary:The cooking smoker works by the convection type of heat transfer to cook the meats. In convection type heat transfer, heat energy is transferred between a surface and a fluid in motion. The smoker's heat transfer is dependent on convection currents. The heat transfers from the smoke to the meat surface by means of convection, thereby cooking the meat with a smoky flavor.

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The magnitude of the radius of curvature of the concave surface is 20.8 cm.

A glass lens with a refractive index of 1.60 and a focal length of -32.4 cm is plano-concave in shape. To find the magnitude of the radius of curvature of the concave surface, we can use the lensmaker's formula:

1/f = (n - 1) * (1/R₁ - 1/R₂)

Where f is the focal length, n is the refractive index, R₁ is the radius of curvature of the convex surface, and R₂ is the radius of curvature of the concave surface.

Given that the focal length (f) is -32.4 cm and the refractive index (n) is 1.60, and assuming the convex surface is flat (R₁ = infinity), we can rearrange the formula and solve for R₂:

The magnitude of the radius of curvature is always positive, so taking the absolute value, we find that the magnitude of the radius of curvature of the concave surface is approximately 54 cm.

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Answer:

Wavelength is the distance fromone crest to another or from one troughtto another of a wave is called wavelength.

Answer:

320 m/s

Explanation:

40 miles per second and 8 seconds makes 40 times 8

Answer:

Below

Explanation:

"echo location"

The sound travels the distance, d , to the food and back for a total distance of  2d

2d =   1530 m/s * .13 s

d = ~ 99 m away

The correct answer to the focal length of the corrective contact lens needed by a nearsighted person whose far point is 60 cm is 60 cm.

The focal length can be calculated by using the lens formula: 1/f = 1/v - 1/u, where f is the focal length, v is the image distance, and u is the object distance.

In this case, the far point is 60 cm, which means that the person can see objects clearly only if they are within 60 cm from the eye. Therefore, the image distance (v) is 60 cm. The object distance (u) is infinity, since the person is trying to see distant objects clearly.

Putting these values into the lens formula, we get:

1/f = 1/60 - 1/infinity

1/f = 1/60

f = 60 cm

Therefore, the focal length of the corrective contact lens needed by this person is 60 cm.

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Answer:

Shangdi or A: Di

Explanation:

Shangdi was considered to be the supreme deity during the Shang dynasty (1600–1046 century BCE), but during the Zhou dynasty (1046–256 BCE) he was gradually supplanted by heaven (tian).

Answer:

Elasticity

Elasticity is the ability of rubber, for example to return to it's natural shape after being bent and forced in different directions.

Answer:

Elasticity

Explanation:

just gooooooooogle search it

Answer:

yes

Explanation:

this is true don't believe other people whether right or wrong

Answer:

The formula for speed is speed=distance

time

Explanation:

to work out what the units are for speed,you need to know the units for distance and time.In this example,distance is in metres(m) and time is in seconds (s) , so the units for speed is metre per second (m/s).

Answer:

I think the answer is D because it needs to be on two hours from 1.15pm

Answer:

Physics is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force.

Ancient history. Elements of what became physics were drawn primarily from the fields of astronomy, optics, and mechanics, which were methodologically united through the study of geometry. These mathematical disciplines began in antiquity with the Babylonians and with  writers such as Archimedes and Ptolemy.

Answer:

I don't know but It should exist or else reality would not exist

Explanation:

The statement that the Chernobyl accident will kill 24,000 people is based on various scientific studies and assessments conducted by organizations such as the UNSCEAR and WHO.

The estimated number of deaths resulting from the Chernobyl accident is based on extensive research and analysis of the long-term effects of radiation exposure on human health.

Studies have been conducted to assess the immediate and long-term impacts of the accident on the affected population, including the residents of nearby areas and the emergency workers involved in the cleanup efforts.

These studies take into account factors such as the initial radiation exposure, the potential for increased cancer risks, and other health effects associated with radiation exposure. The estimated figure of 24,000 deaths is an approximation based on scientific modeling.

It's important to note that estimating the exact number of deaths caused by the Chernobyl accident is challenging due to factors such as the long latency period for certain diseases and the complex relationship between radiation exposure and health outcomes.

The statement that the Chernobyl accident will result in 24,000 deaths is based on scientific studies and assessments conducted by organizations such as UNSCEAR and WHO. These estimates consider the long-term health effects of radiation exposure and are subject to ongoing research and refinement in the field of radiobiology.

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Answer:

\( \boxed{\sf Distance \ travelled = 44 \ m} \)

Given:

Initial speed (u) = 22 m/s

Final speed (v) = 0 m/s (Rest)

Time taken (t) = 4 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

\( \boxed{ \bold{s = (\frac{v + u}{2} )t}}\)

By substituting value of v, u & t in the equation we get:

\( \sf \implies s = ( \frac{0 + 22}{2} ) \times 4 \\ \\ \sf \implies s = \frac{22}{2} \times 4 \\ \\ \sf \implies s = 11 \times 4 \\ \\ \sf \implies s = 44 \: m\)

\( \therefore\)

Distance travelled by car (s) = 44 m

Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

The total power dissipated by the circuit is 36W. We can solve this circuit using a combination of Ohm's Law and Kirchhoff's Laws.

(a) To find the effective resistance of the circuit, we can first simplify the circuit by combining the two parallel resistors:

1/Req = 1/2Ω + 1/3Ω

1/Req = 5/6Ω

Req = 6/5Ω

Now, we can combine the two series resistors with Req: Req_tot = 6/5Ω + 4Ω = 14/5Ω

Therefore, the effective resistance of the circuit is 14/5Ω, or 2.8Ω.

(b) Using Ohm's Law, we can find the current through each resistor if we know the voltage across it. Since the 3Ω resistor has a voltage difference of 6V across it, the current through it is:

I = V/R = 6V/3Ω = 2A

Using Kirchhoff's Current Law (KCL), we know that the current through the 2Ω resistor is the same as the current through the 3Ω resistor. Therefore, the current through the 2Ω resistor is also 2A.

(c) Using Kirchhoff's Voltage Law (KVL), we know that the sum of the voltage drops across each resistor must be equal to the battery voltage. Therefore, we can calculate the battery voltage by adding the voltage drops across each resistor: V_battery = V_2Ω + V_3Ω + V_4Ω

We know the current through each resistor, so we can use Ohm's Law to calculate the voltage drop across each resistor:

V_2Ω = IR = (2A)(2Ω) = 4V

V_3Ω = IR = (2A)(3Ω) = 6V

V_4Ω = IR = (2A)(4Ω) = 8V

Substituting these values, we get:

V_battery = 4V + 6V + 8V = 18V

Therefore, the battery voltage is 18V.

(d) To calculate the total power dissipated by the circuit, we can use the formula:

P = IV

We know the current through each resistor, so we can use Ohm's Law to calculate the voltage drop across each resistor, and then use the formula above to calculate the power dissipated by each resistor:

P_2Ω = (2A)(4V) = 8W

P_3Ω = (2A)(6V) = 12W

P_4Ω = (2A)(8V) = 16W

The total power dissipated by the circuit is the sum of the power dissipated by each resistor:

P_tot = P_2Ω + P_3Ω + P_4Ω = 8W + 12W + 16W = 36W

Therefore, the total power dissipated by the circuit is 36W.

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Explanation:

since oil needs more boiling time and a higher boiling temperature the oil would have to be in the pot longer than the water if it needs to be boiled longer that is why the blue line for oil temp. is significantly higher than that of the water temp.

Answer:

According to the law of conservation of momentum:

Momentum of the car and insect system before collision = Momentum of the car and insect

system after collision

Hence, the change in momentum of the car and insect system is zero.

The insect gets stuck on the windscreen. This means that the direction of the insect is

reversed. As a result, the velocity of the insect changes to a great amount. On the other hand,

the car continues moving with a constant velocity. Hence, Kiran’s suggestion that the insect

suffers a greater change in momentum as compared to the car is correct. The momentum of

the insect after collision becomes very high because the car is moving at a high speed.

Therefore, the momentum gained by the insect is equal to the momentum lost by the car.

Akhtar made a correct conclusion because the mass of the car is very large as compared to

the mass of the insect.

Rahul gave a correct explanation as both the car and the insect experienced equal forces

caused by the Newton’s action-reaction law. But, he made an incorrect statement as the

system suffers a change in momentum because the momentum before the collision is equal to

the momentum after the collision.

The ball has more momentum compared to clay because of its better movement.

The momentum change of every item is given through:

Δp=mΔv=m(v - u)

Each items have equal mass m and identical initial speed u. So we've got:

- For the ball, the very last pace is

v = -u

since it bounces lower back (so, opposite direction --> negative signal) with same speed (so, the magnitude of the final pace remains u). So the trade in momentum is

Δp = m(v - u) = m((-u) - u) = -2mu

The final velocity is

v = 0

Since it sticks to the wall. So, the change in momentum is

Δp = m(v - u) = m(0 - u) = -mu

So we see that the extra momentum change (in importance) is experienced with the aid of the ball.

Momentum refers to the property of an object that determines the amount of force required to change its motion. The law of conservation of momentum states that the total momentum of a closed system remains constant, provided there are no external forces acting on it.

An object with a higher momentum will be harder to stop or change direction than an object with a lower momentum. This is because a larger amount of force is required to overcome its existing motion. Momentum plays a crucial role in many aspects of physics, including mechanics, electromagnetism, and quantum mechanics. It is also important in everyday life, such as in sports, where the momentum of a ball can determine its trajectory and impact.

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Complete Question: -

A rubber ball and a lump of clay have equal mass. They are thrown with equal speed against a wall. The ball bounces back with nearly the same speed with which it hit. The clay sticks to the wall. Which one of these objects experiences the greater momentum change?