a cart is going around a circular loop, as shown in the figure. the cart moves with the smallest speed necessary to stay in contact with the loop to complete a circular path at point 1. what is the speed of the cart at point 2?

Answer:

218 N

Explanation:

The weight of the object on Uranus W = mg' where m = mass of the object = 25.0 kg and g' = gravitational acceleration.

Since in the table, we are given different values, we look for the value of the gravitational acceleration because, that is the only variable there that can help us calculate the weight of the object.

From the table, the gravitational acceleration g' = 8.7 m/s².

So, the weight of the object W = mg'

= 25.0 kg × 8.7 m/s²

= 217.5 N

≅ 218 N

Answer:

B. 218 N

Explanation:

Edge 2020

Lamarck's theory of evolution, also known as Lamarckism, proposed two main ideas. Firstly, the theory of use and disuse suggests that organs or traits that are used more frequently become stronger and more developed, while those that are not used gradually deteriorate over generations. Secondly, the theory of inheritance of acquired characteristics states that an organism can pass on traits acquired during its lifetime to its offspring.

Under Lamarck's theory, an organism might evolve by developing or strengthening certain traits through use and passing them on to the next generation. For example, if a giraffe stretches its neck to reach leaves high in the trees, its offspring would inherit a longer neck. This gradual elongation of the neck would continue over generations.

In contrast, under Darwin's theory of natural selection, an organism might evolve through the process of adaptation to its environment. For instance, consider a bird population with varying beak sizes. If the available food source consists of small seeds, individuals with smaller beaks are more likely to survive and reproduce, passing on their genes for smaller beaks. Over time, the average beak size in the population would decrease due to the selective advantage of smaller beaks in obtaining food.

In summary, Lamarck's theory proposed that acquired traits can be inherited, leading to gradual changes in an organism's characteristics. Darwin's theory, on the other hand, emphasized the role of natural selection in the adaptation of organisms to their environment, resulting in the accumulation of advantageous traits over generations.

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Answer:

The measurement of an object's motion with respect to any other object that is moving or stationary is called Relative Motion.

Answer:

A. a motor

Explanation:

A motor is an electrical device or machine that converts electrical energy into mechanical energy. That is, a motor takes electrical energy to produce motion. There are different types of motors such as DC motor, induction motor and so on.

When electrical current flows through a coil, a magnetic flux is been produced, therefore when a rotating power source is supplied to coil of a motor, a magnetic field is produced which causes torque.

Answer:

A: Motor.

Explanation:

It’ll be a motor because motors use rotating electric power sources to produce magnetic fields.

Answer:

True

Explanation:

Answer:

Given,

Object distance, u=25cm

Focal length, f=20cm

From mirror formula

f

1

​

=

v

1

​

+

u

1

​

−20

1

​

=

v

1

​

−

25

1

​

⇒

v

1

​

=−

20

1

​

+

25

1

​

v=100cm

The image will be real, inverted magnified

Explanation:

Given,

Object distance, u=25cm

Focal length, f=20cm

From mirror formula

f

1

​

=

v

1

​

+

u

1

​

−20

1

​

=

v

1

​

−

25

1

​

⇒

v

1

​

=−

20

1

​

+

25

1

​

v=100cm

The image will be real, inverted magnified

Yes, ultraviolet light and irradiation can destroy riboflavin.

Riboflavin is a light-sensitive vitamin that can break down when exposed to light, particularly UV light. This is why milk and other products that are fortified with riboflavin are often packaged in opaque containers to protect the vitamin from light damage.

When ultraviolet (UV) radiation activates the vitamin B2 riboflavin, active oxygen is produced, which destroys cell membranes and stops the spread of pathogens like viruses, bacteria, and protozoa in all blood products.

However, some studies suggest that controlled exposure to UV light and riboflavin can be used to disinfect surfaces and water. In this process, called UV-C irradiation, the riboflavin helps to enhance the antimicrobial effects of the UV light.

Riboflavin can therefore be destroyed by radiation and UV light.

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By calculating the distortion of those galaxies and then using Doppler's formula to convert the redshift to a recession velocity, one can determine the distances to the universe's most distant objects.

A galaxy's hue and surface brightness irregularities (SBF, for short) can be used by astronomers to determine a galaxy's distance from Earth. When measured in this way, most galaxies are thousands of light years from us.

The reason it is called a ladder is because each level or measurement system depends on the one before it The more journeys astronomers took to get there, the larger the distance that has been measured. The sole "direct" approach available to astronomers to gauge distance outside the Planetary System is stellar parallax.

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Answer:

It's actually C. food webs

Explanation:

took the test

Answer: c

Explanation:

edge 2020

When a 1,500 kg car hits a brick wall with a force of 60.0 N in 1.75 s, the change in the momentum of the car is 105 kg.m/s.

A 1,500 kg car (m) hits a brick wall with a force of 60.0 N (F) in 1.75 s (t). We want to determine the change in the momentum of the car.

The impulse-momentum theorem states that the change in momentum (Δp) of an object equals the impulse (I) applied to it.

This is represented through the following formula.

I = Δp

F × t = Δp

Δp = F × t = 60.0 N × 1.75 s = 105 kg.m/s

When a 1,500 kg car hits a brick wall with a force of 60.0 N in 1.75 s, the change in the momentum of the car is 105 kg.m/s.

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The estimated age of the solar system is 4558 million years,

with N = 4.558.

The exponent n is a number that represents the power to which the base number is raised.

The exponential function is represented as xn, where x is the base and n is the exponent.

The question seeks to determine the value of n given N and the estimated age of the solar system.

The formula for calculating the value of n is:

N = 10n
Taking the logarithm of both sides, we get:
log(N) = log(10n)
Using the rule of logarithm, log(a^b) = b log(a), we can rewrite the equation as:
log(N) = n log(10)

Since log(10) = 1, we have:
n = log(N)

Substituting N with the estimated age of the solar system, we get:
n = log(4.558)

Using a calculator, we find that log(4.558) is approximately 0.6609.

the value of the exponent, n, is approximately 0.6609.

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Answer:

They are gaining energy, can move and slide past each other.

Explanation:

Because as ice melts, the molocules gain energy/heat which warm them up and are able to slide/move apart from each other.

Answer:

200 N to the right

Explanation:

An experimenter exposed participants to different room temperatures to determine the effects on aggression. Aggression was the dependent variable.

A variable is a characteristic, quality, or quantity that can take on different values.

In scientific research, variables are used to measure, analyze, and evaluate a phenomenon.

These can be continuous or discrete.

Variables are divided into two categories: independent variables and dependent variables.

An independent variable is a variable that does not depend on other variables, whereas a dependent variable is a variable that is dependent on other variables.

The independent variable is the variable that researchers manipulate or control, while the dependent variable is the variable that researchers measure or observe.

In scientific research, an independent variable is a variable that is manipulated, whereas a dependent variable is a variable that is observed.

An experimenter exposed participants to different room temperatures to determine the effects on aggression.

In this study, the independent variable is room temperature, while the dependent variable is aggression.

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Answer:

The baking soda and citric acid mixture is common in commercial cold packs. However, once the reaction is complete, the cold pack is done. Another non-toxic chemical that can be used to generate a cold reaction is sodium acetate. ... Dissolving the crystals in water, on the other hand, is an endothermic (cold) reaction.

Explanation:

According to the given statement is  currents of equal magnitude  the current I is 30mA.

Current is the movement of electrical charge carriers, which are frequently electrons or atoms lacking in electrons. Current is frequently represented with the capital letter I. The common unit is the ampere, which is represented by the letter A.

According to Ohm's equation, V = IR, the current flowing through a conductor is proportional to the voltage V and resistance R. I = V/R is an alternate formulation of Ohm's law.

Distance, r = 6.6 cm

Force per unit length,  = 3.1 nN/m

Current passes, when wire is parallel:

→ I₁ = i₂

We know the relation,

\(\frac{F}{l}=\frac{\mu_0}{2 \pi} \times \frac{I_1 \times I_2}{r}\)

By substituting the values, we get

3.1 × 10⁻⁹ = \(\frac{3 \pi \times 10^{-7}}{2 \pi} \times \frac{I^2}{6.6 \times 10^{-2}}\)

The current will be:

I = 0.030884 A

= 30mA

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Answer:

Explanation:

1) Since the bags hold three pineapples

2) we can also hold two pineapples in one bag.

Hope this helps! <3

Statement about the medium spiny neurons in the caudate and putamen

The false statement among the given options is: "They outnumber their target neurons in the globus pallidus by about a factor of 1,000."

Medium spiny neurons in the caudate and putamen are GABAergic, meaning they release the neurotransmitter gamma-aminobutyric acid (GABA). They do receive input from dopaminergic neurons, which play a crucial role in regulating the activity of medium spiny neurons. Additionally, medium spiny neurons are the major output neurons of the striatum, projecting their axons to various target areas.

However, it is incorrect to state that medium spiny neurons outnumber their target neurons in the globus pallidus by about a factor of 1,000. In reality, the connectivity and ratios between these neurons can vary, and the specific ratio mentioned here is not accurate. The connectivity and ratios between medium spiny neurons and their target neurons in the globus pallidus can be more complex and depend on various factors.

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Answer:

Explanation:

D)

Trial Mass of Cart (kg) Initial Velocity (m/s) Final Velocity (m/s) Time for Collision (s)

1 0.50 0.60 -0.52 0.030

2 0.50 0.53 -0.45 0.032

3 0.50 0.70 -0.61 0.033

4 0.75 0.62 -0.52 0.038

5 0.75 0.54 -0.43 0.041

6 0.75 0.71 -0.59 0.039

7 1.00 0.57 -0.48 0.040

8 1.00 0.62 -0.52 0.042

9 1.00 0.75 -0.64 0.043

10 1.25 0.59 -0.49 0.045

F)

The best-fit line represents the relationship between the impulse applied to the cart by the bumper and the cart's change in velocity during the collision with the bumper. The impulse is equal to the change in momentum, which can be calculated as:

Impulse = (Mass of Cart) x (Change in Velocity)

We can plot the impulse on the x-axis and the change in velocity on the y-axis, and the slope of the best-fit line will be equal to the mass of the cart.

Here is the graph:

The equation of the best-fit line is:

y = -1.054x + 0.052

where y represents the change in velocity (in m/s) and x represents the impulse (in Ns).

The slope of the best-fit line is -1.054, which represents the mass of the cart in kilograms. Therefore, the experimental value for the mass of the cart is:

Mass of Cart = -slope = -(-1.054) = 1.054 kg

G)

The principle used to calculate the mass of the cart is based on the conservation of momentum. During the collision, the impulse applied to the cart by the bumper is equal to the change in momentum of the cart. By plotting the impulse and the change in velocity on a graph, we can find the slope of the best-fit line, which is equal to the mass of the cart.

The symbol "mg/L" in water quality represents milligrams per liter, which is a unit of measurement commonly used to express the concentration of substances in water. Option a is right choice.

The symbol "mg/L" in water quality refers to milligrams per liter, which is a unit of measurement commonly used to express the concentration of substances in water.

This unit represents the number of milligrams of a particular substance that are present in one liter of water.

In the context of water quality, the concentration of various substances is typically measured in parts per million (ppm) or parts per billion (ppb). For example, the concentration of dissolved oxygen in water is typically expressed in milligrams per liter (mg/L), which is equivalent to ppm.

Micrograms per liter (µg/L) is another unit of measurement that is commonly used to express the concentration of substances in water.

However, this unit is typically used for substances that are present in very low concentrations, such as certain pollutants or toxins. In some cases, concentrations may be expressed in parts per trillion (ppt), which is equivalent to µg/L.

Option a is right choice.

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The charge in fig A is positive, in fig B is positive and in fig C is negative. this is given by the Fleming's left hand rule.

In magnetism and electromagnetic, the Fleming Left-Hand Rule and Fleming Right-Hand Rule are fundamental principles. They were created by John Ambrose Fleming in the late 19th century as an easy method of determining the direction of motion in an electric motor or the direction of electric current or electric positive charge in an electric generator. It is crucial to remember that these criteria only indicate the direction of the three parameters (magnetic field, current, and force) when the direction of the other two parameters is known and do not define their magnitude.

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The following sources sort by whether they might be considered as originating from intelligence or simply be natural phenomena are:

Probably Cosmic:

Possibly Extraterrestrial:

Even though it may have an impact on humans, a natural phenomenon is not a man-made event. Sunrise, the weather, decomposition, free fall, and erosion are all common examples of natural phenomena. The majority of natural phenomena, like fog, are not particularly harmful to humans. Natural phenomena can take many forms, including the following: ⁕Land peculiarities ⁕Meteorological peculiarities ⁕Oceanographic peculiarities

Or on the other hand Can be characterized along these lines, Regular peculiarity - all peculiarities that are not counterfeit. phenomenon: any state or process that can be perceived without using reason or intuition. synthetic peculiarity - any normal peculiarity including science (as changes to particles or atoms)

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Answer:

W = 1.8 J

Explanation:

The amount of work required to move the given charges can be found by using the following formula:

\(W = \frac{kq_1q_2}{\Delta r} \\\\\)

where,

W = Work done = ?

k = Colomb's constant = 9 x 10⁹ Nm²/C²

q₁ = magnitude of first charge = 6 μC = 6 x 10⁻⁶ C

q₂ = magnitude of second charge = 4 μC = 4 x 10⁻⁶ C

Δr = change in distance = 18 cm - 6 cm = 12 cm = 0.12 m

Therefore,

\(W = \frac{(9\ x\ 10^9\ Nm^2/C^2)(6\ x\ 10^{-6}\ C)(4\ x\ 10^{-6}\ C)}{0.12\ m}\)

W = 1.8 J

Answer:

one which is closer to the star

Answer:

A is your answer

Explanation:

mark brainleist plz

The magnitude of the impulse due to the collision is 2.2 kg·m/s.

The impulse due to the collision can be calculated using the principle of conservation of momentum.

Impulse = change in momentum

Since the golf ball leaves the club face with a velocity of +44 m/s, the change in momentum can be calculated as:

Change in momentum = (final momentum) - (initial momentum)

The initial momentum is given by the product of the mass and initial velocity, and the final momentum is given by the product of the mass and final velocity.

Initial momentum = (mass) * (initial velocity) = (5.0 x 10^-2 kg) * (0 m/s) = 0 kg·m/s

Final momentum = (mass) * (final velocity) = (5.0 x 10^-2 kg) * (+44 m/s) = +2.2 kg·m/s

Therefore, the change in momentum is:

Change in momentum = +2.2 kg·m/s - 0 kg·m/s = +2.2 kg·m/s

The magnitude of the impulse due to the collision is equal to the magnitude of the change in momentum, which is:

|Impulse| = |Change in momentum| = |+2.2 kg·m/s| = 2.2 kg·m/s

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Answer: A.) Change in Velocity over Time

Explanation:

The definition of acceleration is Δv/t, or the change in velocity over time. Acceleration, like velocity, will therefore have a magnitude, as well as a direction.

ANSWER

False

EXPLANATION

We want to know if the image produced by a convex lens is always real.

A convex lens can form real images but it can also form virtual images. This will only occur when the object is placed in between the focus and optical center of the lens.

In this case, the image is erect and enlarged and magnification is always greater than 1.

The answer is false.

To calculate the density, specific weight, and specific gravity of the oil in the cylindrical can, we'll use the following formulas:

Density (ρ) = Mass (m) / Volume (V)

Specific weight (γ) = Weight (W) / Volume (V)

Specific gravity (SG) = Density of substance / Density of reference substance

1. Density (ρ) = Mass (m) / Volume (V)

ρ = \(2.5 kg / 0.001419 ^3\)

ρ ≈ 1760.07 kg/m³

Therefore, the density of the oil is approximately 1760.07 kg/m³.

2. Specific weight (γ) = Weight (W) / Volume (V)

Weight (W) = Mass (m) × Acceleration due to gravity (g)

W = 2.5 kg × 9.8 m/s²

W ≈ 24.5 N

γ = \(24.5 N / 0.001419 m^3\)

γ ≈ 17248.54 N/m³

Therefore, the specific weight of the oil is approximately 17248.54 N/m³.

3. Specific gravity (SG) = Density of substance / Density of reference substance

In this case, the reference substance is usually water with a density of 1000 kg/m³.

SG = \(1760.07 kg/m^3 / 1000 kg/m^3\)

SG ≈ 1.76

Therefore, the specific gravity of the oil is approximately 1.76.

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