A 60 kg skier starts from rest from the top of a 50 m high slope. What is the speed of the skier on reaching the bottom of the slope? (Neglect friction.)

A) 9.8 m/s

B) 31 m/s

C) 41 m/s

D) 22 m/s

Answer:

150,000grams

Explanation:

100*50*30=150,000

Also 1ml water= 1 grams

Answer:

150,000³

Process:

You multiply 100cm x 50cm x 30cm. The reason you do this is because the "mass" will be the volume of the tank of water. A "small 2" would represent a two dimensional area, whereas the "small 3" would represent a 3 dimensional area.

Answer:

Not as big as the previous asteroid that whipped out the dinosaurs

Answer it scapes away loose anf rough pieces of wood

Explanation:

Answer:

To achieve a nice smooth finish, it's essential to sand to help prepare the area for painting application, by sanding you are removing imperfections (also known as pimples), creating a nice smooth finish while at the same time adding adhesion by developing small, rough ridges for the paint to stick to.

Using the right sandpaper can make all the difference in a woodworking, painting, or finishing project; but choosing between the many different types of sandpaper that are available can be a challenge. Here are some tips on how to choose the best sandpaper for your next project.

Explanation:

Sry if this is wrong :(

Answer:

The mass of a spacecraft is the same on earth as the moon.

W = F = M a    the weight is different because the acceleration due to gravity is less on the moon than it is on earth.

On could choose a different mode of acceleration, say a compressed spring, and find that mass of an object does not depend on gravitational attraction.   F = M a holds on the moon as well as on earth

Answer:

The answer should be C. some mass was consumed in the reaction

A powder and a liquid with a total mass of 20 grams are combined in an open beaker, then the best explanation for the difference in mass is that some mass was consumed in the reaction. Hence, option C is correct.

A chemical reaction is the process by which any or more compounds, known as reagents, change into one or more new ones, known as products. Active ingredients or compounds make up substances. The atoms that make up the reactants are reorganized in a chemical reaction to create various products.

Technology, society, and even life itself depend on chemical interactions in one way or the other and. Chemical reactions have been recognized and employed for thousands of years in a wide variety of activities, including burning fuels, smelting iron, creating pottery and pottery, brewing beer, making wine, and manufacturing cheese. There are countless examples of complicated chemical reactions in all living systems, as well as in the Earth's geology, atmosphere, and oceans.

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It is important to describe the reference frame you are using when sharing information about position because it helps to determine the relative distance or position of an object.

A frame of reference is a particular position or point on which you base your judgment of a moving object.

Also, reference frames are used to specify the relationship between a moving observer and the phenomenon under observation.

A frame reference helps to measure the accurate position or distance traveled by an object.

Thus,  it is important to describe the reference frame you are using when sharing information about position because it helps to determine the relative distance or position of an object.

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Answer:

I believe it d I'm not completely sure but yeah

The refrigerator is removing 300 watts of heat every hour.

Energy can only be changed in form; it cannot be created or destroyed, according to the basic law of thermodynamics. For any system, energy transfer examples include mass crossing the control boundary, external work, or heat transfer across the barrier. These have an impact on the energy reserves of the control volume.

The rate of heat removal from within the refrigerator may be calculated using the formula below thanks to the First Law of Thermodynamics and the definition of a refrigeration cycle.

Rate of heat transfer to the space, measured in watts.

Q=800 W W=500

The refrigerator removes heat at a rate of (800-500) 300 watts per hour.

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The type of reaction that produces ATP (adenosine triphosphate) energy is called cellular respiration.

Cellular respiration is a biochemical process that occurs in the cells of living organisms, including plants and animals, and involves the breakdown of organic molecules to release energy in the form of ATP.

The overall equation for cellular respiration is:

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP

During cellular respiration, organic molecules, such as glucose, are oxidized in a series of enzyme-catalyzed reactions. These reactions occur in three main stages: glycolysis, the citric acid cycle (also known as the Krebs cycle), and oxidative phosphorylation (also known as the electron transport chain).

In glycolysis, glucose is converted into pyruvate molecules, producing a small amount of ATP and NADH (nicotinamide adenine dinucleotide).

The pyruvate molecules then enter the citric acid cycle, where they undergo further oxidation to produce additional ATP, NADH, and FADH₂ (flavin adenine dinucleotide).

The NADH and FADH₂ molecules produced in glycolysis and the citric acid cycle then enter oxidative phosphorylation, which takes place in the inner mitochondrial membrane. Here, electrons from NADH and FADH₂ are passed through a series of protein complexes, creating a proton gradient across the membrane.

The flow of protons back into the mitochondrial matrix drives the synthesis of ATP through the enzyme ATP synthase. This process is known as chemiosmosis.

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The mechanical advantage of the of the lever is determined as 10.

A mechanical advantage is a form of calculation that measures the amplified force taken by the mechanical system.

Mathematically, the formula for mechanical advantage is given as follows;

M.A = load / effort

In this question the load is given as 10,000 N

The effort applied in lifting the car is given as 1000 N

The mechanical advantage of the of the lever is calculated as follows;

M.A = load / effort

M.A = 10,000 N / 1000 N

M.A = 10

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Answer:  An effect of continental drift is causing tectonic plates resting upon the convecting mantle to move which results in natural disasters like earthquakes, volcanic eruptions, and more.

Answer: Gamma rays (violet) have the shortest wavelengths and the highest frequencies.

Explanation: The wavelength of the gamma rays is less than 0.01 nanometers. The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.

The electromagnetic waves have the shortest wavelength and the highest frequency is Gamma rays (violet).

Gamma radiation, from gamma rays (γ), is a type of electromagnetic radiation usually produced by radioactive elements. Gamma rays, due to their high energy, are able to penetrate matter more deeply than alpha or beta radiation.

Gamma ray is a type of high frequency electromagnetic radiation usually produced by radioactive elements.

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Answer:

The answer is not B or D because they need light co2 and water to make their food so B and D are out. and unless someone is walking during winter to feed it. It will not be A so the answer is C.

Explanation:

Plants can use heat in the ground to make food in winters. Plants make food through photosynthesis, and photosynthesis takes place mostly in plant leaves, but when plants lose their leaves in the winter, they do not die. Thus, the correct option is B.

Photosynthesis is the process through which plants use the sunlight, which is trapped in the chlorophyll pigment present in the chloroplast of cells to convert water, and carbon dioxide to produce oxygen gas and energy in the form of sugar (carbohydrate).

Photosynthesis is the process in which energy transformation takes place. In this process, light energy from the sun is converted into chemical energy that is in the form of carbohydrate in the leaves of the plant.

Therefore, the correct option is B.

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The force acting on the object will be 32 N.

Newton's second law of motion states that, "the force is equal to the change in momentum per change in the time". The mathematical form of the law is given below.

\(F = \frac{dP}{dt}=\frac{d(mv)}{dt}=m\frac{dv}{dt}=ma\)

Where P = momentum, t = time, m =mass, v = velocity, a = acceleration and F = force.

The mass of the object is 4 kg and acceleration is 8 m/s^2. Substitute the values in the equation and we will get the force.

F = ma

F = 4 kg * 8 m/s^2

F = 32 kg.m/s^2

F = 32 N

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The projectile launch relations allow to find the results for the maximum height of the jump of the cat is 0,, 287 m

The projectile launch studies the movement of the body near the earth, let's use the relationship

             \(v_y^2 = v_o_y - 2 g y\)  

Where v_y is the vertical velocity, v_[oy} the initial vertical velocity, g the acceleration of gravity (g = 9.8 m / s²) and t the time

They indicate that the cat jumped with an initial velocity of v₀ = 2.74 m / s and an angle of θ = 60º, let's use trigonometry to find the components of the velocity

         v₀ₓ = v₀ cos 60

         \(v_o_y\) = v₀ sin 60

         \(v_o_y\) = 2.74 sin 60 = 2.37 m / s

In the point highest trajectory the vertical speed must be zero (v_y = 0), in the attached we can see a diagram of the speeds of the cat

          0 = \(v_{oy}^2\)  - 2g y

          y =  \(\frac{v_{oy}^2 }{2g}\)

Let's calculate

         y = \(\frac{2.37^2}{2 \ 9.8 }\)  

         y = 0.287 m

In conclusion with the projectile launch relations we can find the results for the maximum height of the cat jump is 0,, 287 m

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Answer:

d = 421.83 m

Explanation:

It is given that,

Height, h = 396.9 m

Horizontal speed, v = 46.87 m/s

We need to find the distance traveled by the ball horizontally. Let t is the time taken by the ball. Using second equation of motion for vertical direction. So,

\(396.9=0\times t+\dfrac{1}{2}\times 9.8 t^2\\\\t=9\ s\)

Now d is the distance covered by the cannonball. So,

\(d=vt\\\\d=46.87\times 9\\\\d=421.83\ m\)

Hence, this is the required solution.

The magnitude of the force that one particle exerts on the other is

\(2.82 * 10^{-2} N\). The charge of the identical positive charge q is \(7.4 * 10^{-7} C\)

The magnitude of the force between two particles is determined by the Coulomb's law. Coulomb's law provides a mathematical relationship between the magnitude of the charge, the distance between the charges, and the force of attraction or repulsion between them.

The magnitude of the force is given by the Coulomb's Law.

\(F = (k*q_1*q_2)/d^2\)

Where, F is the force between the particles, k is Coulomb's constant, \(q_1\) is the charge of particle 1, \(q_2\) is the charge of particle 2, d is the distance between the two charges.

\(q_1 = -7.13 \mu C, q_2 = 4.39 \mu C, d = 4.34 cm = 0.0434 m\)

Substituting the given values in the Coulomb's Law formula,

\(F = (9 * 10^9 Nm^2/C^2)(|-7.13| * 10^{-6} C)(|4.39| * 10^{-6} C)/(0.0434 m)^2F = 2.82 * 10^{-2} N\)

The magnitude of the force that one particle exerts on the other is

\(2.82 * 10^{-2} N\).

Now calculate the charge of the identical positive charge q, that is placed at the same distance. Use the Coulomb's Law again for this calculation.

\(q_1 = q_2 = q_F = (k*q_1*q_2)/d^2F = (k*q^2)/d^2\)

Where,q is the charge of identical positive charge q.

Substituting the given values in the Coulomb's Law formula,

\((2.82 * 10^{-2} N) = (9 * 10^9 Nm^2/C^2) * q^2/(0.0434 m)^2\\q^2= (2.82 * 10^{-2} N) * (0.0434 m)^2/(9 * 10^9 Nm^2/C^2)\\q^2 = 5.4724 * 10^{-13} C^2\\q = \sqrt(5.4724 * 10^{-13} C^2)\\q = 7.4 * 10^{-7} C\)

Therefore, the charge of the identical positive charge q is \(7.4 * 10^{-7} C\)

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Answer:

The correct option is A

Explanation:

Buoyancy can be described as the upward force that causes an object to float on water. When the buoyant force of a liquid is greater than the weight of an object, the object will move to the surface of the liquid and float (because the buoyant force would be able to push it upwards). If the buoyant force is lesser than the weight of the object, the object will sink (because the buoyant force would not be able to push the object upwards). And when the buoyant force and weight of an object cancel out, the object would be suspended at the depth that this occurs.

Thus, from the explanation above, it can be deduced that for an object to float, buoyant force must be greater than weight of the object. Thus, the correct option is A.

An object will float on a fluid when the buoyant force acting on the object is equal to the weight of the object. This condition is described by option C: Buoyant force equals weight.

When an object is placed in a fluid, it experiences an upward force called the buoyant force. The buoyant force is a result of the pressure difference between the top and bottom surfaces of the object. It depends on the density of the fluid and the volume of the object submerged in the fluid.

For an object to float, the buoyant force must be equal to the weight of the object. If the buoyant force is greater than the weight, the object will experience a net upward force and will rise to the surface. In this case, the object will not remain floating, but rather float upwards.

If the buoyant force is less than the weight, the object will experience a net downward force and will sink in the fluid. The object will not float but instead submerge into the fluid.

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Answer:

A

Explanation:

acceleration is defined as the rate of change of velocity with time

In this scenario, the independent variable is the amount of sleep and the dependent variable is the academic performance in English and math classes.

In this research, a researcher is studying the effect of sleep on academic performance. She thinks that less sleep will lead to lower grades. Therefore, she has some people sleep six hours per night. Some people sleep three hours per night, and some people sleep as much as they want.

She then monitors academic behavior during English math classes among participants.

The independent variable here is the amount of sleep that the participants get each night. It is the variable that is being manipulated or changed by the researcher.

The researcher is interested in studying the effect of different amounts of sleep on academic performance. Therefore, the amount of sleep is the independent variable.

The dependent variable is the academic performance of the participants in English and math classes. It is the variable that is being measured by the researcher. The researcher wants to know how different amounts of sleep affect academic performance.

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The values of charge for q₁ and q₂ are 5.715 × 10⁻⁸ C and -5.715 × 10⁻⁸ C, respectively.

Electric charge is the physical property of any matter which causes it to experience a force when it is placed in an electromagnetic field.

The acceleration is upwards. Therefore, the charge will be accelerated upwards and it is attracted by charge q₁ and repelled by q₂. Therefore, the q₁, is positive charge and q₂, is negative charge.

The net force for the following case will be,

Fq₁Q + Fq₂Q = 0

kq₁ Q/ r² = - kq₂ Q/ r²

q₁ = -q₂

The net force is,

Fnet = ma

F net = (5.50 × 10⁻³ kg) (304 m/s²)

Fnet = 1.672 N

The triangle is an isosceles triangle and the value of the angle is,

cos θ = -2.25 cm/ 3cm

θ = cos⁻¹(-2.25 cm/ 3cm)

θ = 41.4°

The force equation is,

F net = kq₁ Q/ r² cos θ + kq₂Q/ r²cos θ

ma = kq₁ Q/ r² cos θ + kq₂Q/ r²cos θ

1.672 N = 2 (9×10⁹) (1.95×10⁻⁶ c) / (3×10² m)² × cos (41.4°)

q₁ = (1.672 N) (3×10² m)²/ (9 × 10⁹) (1.95×10⁻⁶ c) cos (41.4°)

q₁ = 5.715×10⁻⁸ C

Since,

q₂ = -5.715 × 10⁻⁸ C

Therefore, the charge q₁ and q₂ are 5.715 × 10⁻⁸ C and -5.715 × 10⁻⁸ C, respectively.

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The correct expression for the rotational inertia of the spherically shaped object is \(\(\text{c) } 3.6m^5\)\).

In the given scenario, the students determine that the radius of the object is given by \(\(r = km^2\) with \(k = 3\, \text{m/kg}^2\)\). To calculate the rotational inertia of the object, we need to use the formula for rotational inertia of a spherical object, which is given by \(\(I = \frac{2}{5}mr^2\)\), where m is the mass of the object and r is the radius.

Substituting the given expression for r in terms of m, we have \(\(I = \frac{2}{5}m(km^2)^2\)\). Simplifying this equation, we get \(\(I = \frac{2}{5}mk^2m^4\)\).

Substituting the value of \(\(k = 3\, \text{m/kg}^2\)\), we have \(\(I = \frac{2}{5}(3\, \text{m/kg}^2)^2m^5\)\), which further simplifies to \(\(I = \frac{2}{5} \times 9 \, \text{m}^2/\text{kg}^2 \times m^5\)\).

Finally, multiplying the constants, we get \(\(I = 3.6 \, \text{m}^2/\text{kg}^2 \times m^5\)\), which corresponds to option c) \(3.6 \(m^5\)\).

Therefore, the correct expression for the rotational inertia of the object is \(3.6 \(m^5\)\).

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Individuals who need to disclose their compensated outside activities, in addition to their financial/obligatory interests (FOIs), institutional responsibilities (IRs), and sponsored travel, are required to do so at UM (University of Michigan).

At UM, the disclosure process is designed to ensure transparency and mitigate potential conflicts of interest or commitment. In addition to disclosing FOIs, IRs, and sponsored travel, individuals are also obligated to disclose any compensated outside activities they engage in. Compensated outside activities refer to external activities for which individuals receive financial compensation or other forms of remuneration, such as consulting, speaking engagements, or participation in advisory boards.

This additional disclosure requirement aims to provide a comprehensive overview of an individual's potential conflicts and commitments, allowing for appropriate management and assessment. By disclosing compensated outside activities, UM can assess any potential conflicts that may arise between an individual's external commitments and their responsibilities within the university, ensuring that conflicts are appropriately managed and academic integrity is maintained.

It is essential for individuals to comply with these disclosure requirements as part of their commitment to upholding the highest standards of transparency, accountability, and ethical conduct in their academic and professional pursuits.

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Answer:

Physics

Explanation:

Explanation:

We can use the Theorem of Work (W) and Kinetic Energy (K):

W=ΔK=Kf−Ki

it basically tells us that the work done on our system will show up as change in Kinetic Energy:

We know that the initial Kinetic Energy, Ki=12mv2i, is zero (starting from rest) while the final will be equal to 352J; Work will be force time displacement. so we get:

F⋅d=Ff

45d=352

and so:

d=35245=7.8≈8m

Answer:

d= 352/45=7.8≈ 8m

Explanation

We can use the Theorem of Work (W) and Kinetic Energy (K):

W=ΔK=k f - k i , it is basically tells us that the work done on our system will show up as change in Kinetic Energy:We know that the initial Kinetic Energy, ki =1/2 mv 2/i, is zero (starting from rest) while the final will be equal to 352J; Work will be force time displacement. so we get: F . d = Ff

45d= 352 and so d= 352/45=7.8 ≈ 8m

Answer:

A

Explanation: