Robert and his younger brother Jake decide to go fishing in a nearby lake. Just before they cast off, they are both sitting at the back of the boat and the bow of the boat is touching the pier. Robert notices that they have left the fishing bait on the pier and asks Jake to go get the bait. Jake has a mass of 59. 5 kg and an arm reach of 50. 0 cm, Robert has a mass of 87. 5 kg, and the boat has a mass of 83. 0 kg and is 2. 70 m long. Determine the distance the boat moves away from the pier as Jake walks to the front of th

Acceleration is the rate of change of velocity over time. The diagram that shows the effect of cutting acceleration by half without changing initial velocity is graph (c)

The equation is given as:

\(v = 2t + 4\)

The first equation of motion is:

\(v = u + at\)

By comparing both equations, we have:

\(u = 4\) --- initial velocity

\(a = 2\) --- acceleration

When the acceleration is cut in half, the new acceleration is:

\(a_{new} = \frac a2\)

\(a_{new} = \frac 22\)

\(a_{new} = 1\)

So, the equation of velocity is:

\(v = u + at\)

\(v = 4 + 1 \times t\)

\(v = 4 + t\)

When \(t = 0\)

\(v = 4 + 0 = 4\)

When \(t = 1\)

\(v = 4 + 1 = 5\)

The graph of velocity that satisfies \(v = 4 + t\) and the values of time (t) and velocity (v) tested above is (c).

See attachment for the diagram (graph)

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Answer:

A. a total solar eclipse

Explanation:

During a solar eclipse,the moon comes between the sun and Earth, casting its shadow over the Earth

Answer:

Explanation:

potential energy = mgh

kinetic energy = 1/2mv²

Answer:

The torque on the pulley, when the system is motionless is approximately 9.81 N·m

Explanation:

The given parameters are;

The mass of the object = 2 kg

The friction between the rope and the pulley = 0

The mass of the rope, \(m_r\) = 0.5 kg

The mass of the pulley, \(m_p\) = 0.01 kg

The radius of the pulley, r = 0.25 m

The torque on the pulley, τ = I·α = F × D

The torque on the pulley, when the system is motionless, τ = F × D

Where;

F = The force acting on the pulley rope = The weight of the mass ≈ 2 kg × 9.81 m/s² = 19.62 N

D = The diameter of the pulley = 2×r = 2 × 0.25 m = 0.5 m

Therefore;

τ = 19.62 N × 0.5 m = 9.81 N·m

The torque on the pulley, when the system is motionless, τ ≈ 9.81 N·m.

Answer:

5.76×10⁻¹⁷ C

Explanation:

An electron has a charge of 1.6×10⁻¹⁹ C.

360 × (1.6×10⁻¹⁹ C) = 5.76×10⁻¹⁷ C

When the ball is thrown upward, gravity takes control as soon as it is removed from the hand. The ball will only be under its control.

The ball is moving downward at a rate of 9.8 meters per second squared as it approaches the dot-com point. Using a second camera and the gadget, you can perform an experiment where you can observe that the velocity is 0.0 at the top, but varies somewhat before and after it moves.

The ball is accelerating, as can be shown if you take the difference in velocities and calculate acceleration of the ball.

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Answer:

g = 1.25m/s²

Explanation:

Given the following data;

Mass = 5kg

Height = 6m

Gravitational potential energy = 24J

To find the acceleration due to gravity;

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

\( P.E = mgh\)

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

GPE = mgh

Substituting into the equation, we have;

24 = 5*6*g

24 = 30g

g = 30/24

g = 1.25m/s²

Therefore, the acceleration due to gravity on Planet X is 1.25m/s².

Answer:

g=0.8m/s^2

Explanation:

M=5kg

h=6m

GPE=24J

GPE=Mgh

g=GPE/Mh

g=24J/(5kg)(6m)=0.8

g=0.8m/s^2

The correct option is D. the volume of the ventricle when it is most full.

The volume of the ventricle when it is most full is the most correct description of end-diastolic volume.

It can be defined as the amount of blood in the ventricle immediately before a cardiac contraction or systole occurs. End-diastolic volume is the volume of blood in the ventricles at the end of diastole, after filling with blood from the atria, before the ventricles contract to begin systole.

ventricles are hollow chambers or cavities found in the heart and brain. In the heart, there are two ventricles responsible for pumping blood, while in the brain, there are four interconnected ventricles that produce and circulate cerebrospinal fluid.

Therefore, the correct option is D. the volume of the ventricle when it is most full.

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A solid cylinder of mass (M=1 kg) and radius R=0.5 m is pivoted at its center The axis of rotation of the cylinder is horizontal. Three small particles of mass (m=0.1 kg) are mounted along its surface as shown in the figure. The system is initially at rest.

Solid cylinders need to be cut or split into small thin rings.

Each ring consists of a thickness dr of length L.

The moments of these thin cylindrical shells should be summed to infinitesimal.

Follow the instructions given.

1st place Use the general moment of inertia equation.

dI = r2 dm

Next, proceed to the dm determination. It is usually given as follows: To get

dm = ρdV

dm, you first need to calculate DV. It is given as follows:

dV = dA L

where dA is the area of ​​the large ring (radius: r + dr) minus the small ring (radius: r). as a result;

Please check the attached file for ta detailed answer.

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Answer:

\(C_{pb}=0.501\ kJ/kg.K\)

Explanation:

Given that

\(m_1=0.35 kg\)

\(T_1=-27.5^oC\)

\(m_2=0.214 kg\)

\(T_2=25^oC\)

\(T=16.4^oC\)

We know that

\(C_{pw}=4.187 kJ/kg.K\)

By using energy conservation

Heat lost by water = Heat gain by block

\(m_2\times C_{pw}\times (T_2-T)=m_1\times C_{pb}\times (T-T_1)\)

\(0.214\times 4.187\times (25-16.4)=0.35\times C_{pb}\times (16.4+27.5)\)

\(C_{pb}=0.501\ kJ/kg.K\)

Therefore the specific heat of the block will be 0.501 kJ/kg.K

Homeostasis is most closely associated with the drive reduction theory. The drive reduction theory explains how homeostasis is maintained by the satisfaction of biological needs that reduce the drive state.

Homeostasis is the ability of an organism or a cell to regulate its internal environment to maintain a stable, relatively constant condition. It helps ensure the stability of the internal environment in response to changes in external conditions.

Homeostasis helps the organism to survive and function optimally. Examples include regulation of body temperature, blood glucose levels, and water balance.

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The statement describes an advantage of recorded presentations is that the audience members have the opportunity to provide feedback. Thus, the correct option for this question is C.

A recorded presentation may be defined as a popular format of multimedia content with a duration of several seconds or minutes that significantly expresses the advantages of a product, service, or any idea with the support of interesting graphic images, concise text, and appropriate narration.

According to the context of this question, a recorded presentation delivers an advantage to the audience to provide feedback. This is because the process of recorded PowerPoint presentation gives the actual sense and understanding to the audience similar to the real event.

Therefore, the correct option for this question is C.

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a) The derivation of the differential equation is ΔT' = (1 - h/(ρcPu))ΔT + T' - T and is explained in the explanation part below. b) The appropriate boundary conditions are: At the tube entrance (x = 0), T = To. At the tube exit (x = L), the convective heat transfer condition is applied: -kA(dT/dx) = hA(T - T∞).

a) The following assumptions are made to develop the differential equation characterising the temperature distribution of the liquid in the downstream region:

ρc(uA)∂T/∂x + ρc(uA)(T - To)∂u/∂x = kA∂²T/∂x² - hA(T - T∞)

Dividing the above equation by ρcPAu and rearranging, we obtain:

ΔT' = (1 - h/(ρcPu))ΔT + T' - T

b) The boundary conditions are:

Thus, this can be concluded regarding the given scenario.

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B. Vesicle does NOT describe a structural feature of a volcano.

A vent, fissure, and magma chamber are all structural features, while a vesicle refers to a small cavity in volcanic rock, formed by trapped gas bubbles during the solidification of lava. A vent is an opening in the Earth's surface that allows volcanic material to escape. A fissure is a large crack in the Earth's surface that allows lava to flow. A magma chamber is a large underground reservoir containing molten rock. A vesicle is an air pocket inside rocks formed by the expansion of gases during volcanic eruptions.

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Answer:

They are equal

Explanation:

Multiply the mass by the velocity.

Answer:C

Explanation:

If you are holding the ball that would be the ball would have potential energy since it it not moving. Once you drop the ball it will have kinetic energy since it’s moving. If you drop the ball from 6ft it will have more kinetic since it will have more time to accelerate. If you drop the ball from 2ft then it will have less kinetic energy since it is closer to the ground and won’t have beeping time to accelerate and get rid of the potential energy.

Answer:

c

Explanation:

I'm guessing that you need the force, since the question doesn't specify I'll just use the force equation. If this is not what you wanted let me know in the comments section of this answer.

- F = 300 x 4

- F = 1200 N (newtons)

Answer: yes

Explanation:

so basically i need points

Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

Answer:

A

Explanation:

because the first law of thermodynamics is heat brings energy, but don't get confused with C, because bicyle pumps is the thing itself getting warm, though its not providing any energy unlike the stove, which uses it energy to heat something.

hope this helps :)

Answer:

p = -8 kg-m/s

Explanation:

Given that,

Initial speed of the rock, u = 8 m/s

Mass of the rock, m = 1 kg

The ball travels up  to a maximum height, then returns to the ground.

We need to find the rock's momentum as it strikes the  ground. Let v be the final speed of the rock. Its final speed is as same as initial speed i.e. 8 m/s but in negative direction. So

p = mv

p = 1 kg × (-8 m/s)

= -8 kg-m/s

So, the rock's momentum as it strikes the  ground is (-8 kg-m/s).

Answer:

1.125x10^-10 electrons

Explanation:

Pls see attached file

The pressure in your tires would decrease due to the decrease in temperature. The relationship between temperature and pressure is known as the ideal gas law.

which states that pressure and temperature are directly proportional to each other. As the temperature drops, so does the pressure in the tires. The ideal gas law formula is P1/T1 = P2/T2, where P1 is the initial pressure, T1 is the initial temperature, P2 is the final pressure, and T2 is the final temperature.

Using this formula and assuming that the volume of the tires remains constant, we can calculate the final pressure in the tires. P1 is 38 psi, T1 is 25°C + 273.15 (to convert to Kelvin) = 298.15 K, T2 is 0°C + 273.15 = 273.15 K. Plugging in the values, we get P2 = (38 psi * 273.15 K) / 298.15 K = 34.9 psi. Therefore, the pressure in your tires would be approximately 34.9 psi when the temperature drops to 0°C.

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Answer: option (c)

Explanation:

Product development is also known as new product operation.

The main ideal is to satisfy the consumer demand.

There are some stages of product development process. They're idea generation, webbing, conception development and testing, request strategy, developing the new product, request testing, request commercialization.

The process of developing a product is managed by product inventor.

Product development can be done in two ways, the new product is introduced or the being products can be bettered according to the client satisfaction.

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Energy cannot be generated or destroyed; it can only be changed from one form of energy to another, according to the rule of conservation of energy. This implies that a system always possesses the same amount of energy, barring external energy addition.

According to the rule of conservation of energy, energy cannot be generated or destroyed. It can only be changed from one form to another, though. It is simply changed from a form that we can use to one that is less useful. Energy problem as a result of this

Energy efficiency is necessary to save expenses and extend the life of the resources.

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The dimension of a/b where x is the distance and t is the time is T

Given the expression

x = at + bt²

where

x is the distance

t is the time

Based on the homogeneity principle, the expression on the left-hand side must be equal to that on the right. Hence;

x = at

\(a = \frac{x}{t}\)

Since x is the distance and distance is measured in metres, the dimension equivalent will be the length 'L'

Since t is the time and time is measured in seconds, the dimension equivalent will be the seconds 'T'

\(a=\frac{L}{T}\)

Similarly;

x  = bt²

\(b=\frac{x}{t^2}\\b=\frac{L}{T^2}\)

Next is to get a/b;

\(\frac{a}{b} = \frac{L}{T} \div \frac{L}{T^2}\\\frac{a}{b} = \frac{L}{T}*\frac{T^2}{L} \\\frac{a}{b} =\frac{T^2}{T}\\\frac{a}{b} =T\)

Hence the dimension of a/b is T

Answer: B  6.2 Hz

Explanation:  Equation for waves v = λf.

Frequency = speed / wavelength    f = v/λ

   f = 74 m/s / 12 m = 6.166... Hz

Answer:

Rounding is necessary: the answer is 6.2 Hz

Explanation: