Your are on a boat on a lake with no current. The lake is full of sharks that will eat you if you put your hands too close to the water, and your paddle has been eaten by those sharks. However, you do have a big bucket of grapefruit in the boat. How will you get to shore? Your answer must reference Newton's third law.

The correct signs for the heat and work changes to the beaker and balloon system will be +q, -w.Option d is correct.

An amount of stuff or an area in space that is of relevance is referred to as a thermodynamic system.

The area or mass outside the system is referred to as the surrounds, and the surface dividing the two is referred to as the border.

An open system is one that adjusts to the interchange of information, energy, and/or material between the system and its surroundings. This is a key definition in systems science.

The open type of system would allow light and air to enter and exit.

The correct signs for the heat and work changes to the beaker and balloon system will be +q, -w.Because the heat is added and the compression work is done,

Hence,option d is correct.

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The angular momentum of a rotating turntable with initial angular speed 9.8 rad/s and mass 24 kg, changes when a clay mass of 9.3 kg is dropped and sticks at a point 1.8 m away. The final angular speed of the turntable and clay together is 8.11 rad/s.

We can use the conservation of angular momentum to solve this problem. Initially, the turntable is rotating with an angular speed of 9.8 rad/s, and after the clay is dropped, the angular momentum of the system is conserved.

The initial angular momentum of the turntable is

L1 = I1 * ω1

where I1 is the moment of inertia of the turntable and ω1 is the initial angular speed. The moment of inertia of a thin cylindrical disk is given by

I1 = (1/2) * M * R²

where M is the mass of the turntable and R is its radius. Substituting the given values, we get

I1 = (1/2) * 24 kg * (3.1 m)² = 114.48 kg m²

Therefore,

L1 = 114.48 kg m² * 9.8 rad/s = 1123.90 kg m²/s

After the clay is dropped, the system consists of the turntable and the clay rotating together.

The moment of inertia of the system can be found using the parallel axis theorem, which states that the moment of inertia of a body rotating about an axis is equal to the moment of inertia of the body about its center of mass plus the product of its mass and the square of the distance between the two axes

I2 = I1 + M * d²

where d is the distance between the point of rotation and the point where the clay sticks. Substituting the given values, we get

I2 = 114.48 kg m² + 9.3 kg * (1.8 m)² = 138.58 kg m²

The final angular speed of the system can be found by equating the initial and final angular momentum

L1 = L2

where L2 is the final angular momentum of the system. The final angular momentum of the system is

L2 = I2 * ω2

where ω2 is the final angular speed of the system. Solving for ω2, we get

ω2 = L1 / I2 = 1123.90 kg m²/s / 138.58 kg m² = 8.11 rad/s

Therefore, the final angular speed of the turntable and the clay together is 8.11 rad/s.

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The substance is zircon, of which interference analysis is done.

Wavelength of light in solid = λ = 329 nm

Wavelength of light from he-ne laser = λ' = 633 nm

Interference effect = n =

= n =  λ' / λ

= n = 633 / 329

= n = 1.92

The interference, in physics, is the net effect of the combination of two or more wave trains moving on intersecting or coincident paths. The effect is that of the addition of the amplitudes of the individual waves at each point affected by more than one wave.

Thus the substance is zircon.

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Answer:

Tidal energy is alternative source of energy because the energy it produces is free and clean as no fuel is needed and no waste bi-products are produced. It has the potential to produce a great deal of free and green energy.

Work done by the gravity is -1662.28 Joules.

Given that:

m = 90 kg      M = 0.1

Q= 52°          S =  30m

a) work done by friction

w = fs

w = mkns

W = - Mk mg cos∅

W = - 0.1X 90 X 10 X cos 52° x30

w =  2700 X 0.61566

Wf = -1662.286 Joules

b) work done by Tention

W = -TS

W = mg sin∅ x s

W = -90x10xsin 52° x 30

W = -2700 X 0.788

W = -21276.3 Joules

c) work done by gravity

w = mg sing∅xs

wg = 21276.3Joules

d) Total work done

W= -1662-28 - 21276·3 +21276-3 -

W= -1662.28 Joules

Forces have no effect in the vertical direction. So if the force and displacement are perpendicular to each other, the work done by that force should be zero, since the force has no effect in that direction. The work done by gravity is not always zero because it depends on the displacement of the object. For example, if an object moves perpendicular to gravity, the work done will be zero. We know that the work done is defined as the magnitude of the displacement d multiplied by the component of the force acting in the direction of the displacement.

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Answer: 1CM CUBE OF LEAD

Explanation:

The equation =c/f relates wavelength and frequency. There is an inverse relationship between wavelength and frequency.

One crucial equation connects them all: The speed of light is equal to the frequency times the wavelength of any electromagnetic wave. If we know the other measurement, we can use this connection to calculate the wavelength and frequency of the any electromagnetic wave.

The distance between the crests of two waves is known as the wavelength, which also applies to troughs. The number of vibrations that pass across a certain area in a second is the frequency, which is expressed in seconds per cycle (Hz) (Hertz). This article discusses how wavelength and frequency relate to one another.

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Answer:

Isotopes can both be the same element but have a different number of electrons

Explanation: not sure if more was supposed to be there, but i tried

Answer:

Below

Explanation:

Here is what we are given in the problem :

dy = - 1.0 m (this is negative because the cat falls)

Vx = 5.0 m/s

We can use this equation to find the time that it will take the cat to fall :

     t = √-2dy / g

     t = √-2(-1.0) / 9.8

     t = √0.20408

     t = 0.45 (round this to 2 sig figs)

    t = 0.5 seconds

Now we can find dx (distance in the x direction)

     dx = vx (t)

     dx = (5.0m/s)(0.45s)

     dx = 2.258769 m

     dx = 2.3 m

Hope this helps! Best of luck <3

a. The two capacitors are connected in parallel.

b. The capacitance of each capacitor can be calculated using the formula for a parallel plate capacitor, C = ε0 . εr . A / d, where ε0 is the permittivity of free space, εr is the relative permittivity of the dielectric material between the plates, A is the area of the plates, and d is the separation between the plates. The net capacitance is simply the sum of the capacitances of the two capacitors, C net = C1 + C2.

c. The minimum value of the net capacitance occurs when d1 = d2 = 0, and the maximum value occurs when d1 and d2 are large compared to the separation between the plates. In either case, the net capacitance can be calculated using the formula for parallel plate capacitors.

A capacitor is a passive electronic component that stores electrical energy in an electric field between two conductive plates. When a voltage is applied to the plates, an electric field is established, causing positive charges to collect on one plate and negative charges to collect on the other. The capacitance of a capacitor is a measure of its ability to store electrical charge and is proportional to the surface area of the plates and inversely proportional to the separation between the plates. Capacitors are used in a wide range of electrical and electronic applications, including power supplies, signal filtering, and energy storage.

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Answer:

A

Explanation:

They drove 30km north. The displacement adds up to 25km therefore making the distance greater

Hope this helps!

Answer:

Speed of  cannonball just before it hits the ground is  90.77 m/s

Explanation:

Complete Question

A small cannon is placed on top of a fortification. the cannonball leaves the muzzle of the cannon with a speed of 85 m/s at an angle of 25°c above the horizontal. just before the cannonball hits the ground, the vertical component of velocity is 48 m/s downward. what is the speed of the cannonball just before it hits the ground? ignore air resistance.

Solution

Given  

Speed = 85 m/s

The angle = 25 degrees

When it will hit the ground, then vertical velocity = 48 m/s

However, in the projectile motion, the horizontal component will not change  

Vr = V cos (theta) = 85 * cos25

Speed of  cannonball just before it hits the ground is  

V’ = Sqrt (48^2 + (85 * cos 25)^2) = 90.77 m/s

Answer:

18.75

Explanation:

p=mv, where p is momentum, m is mass, and v is velocity. For the car:

p=1200*2.5=3000

For the deer:

3000=160*v

v=18.75m/s

Hope this helps!

In simple terms, 2nd law of thermodynamics law says that in any process, some energy will inevitably be lost as unusable waste heat, and that the total amount of useful energy in a system will eventually become depleted.

The 2nd law of thermodynamics states that the total entropy (a measure of disorder or randomness) of a closed system will always increase over time.

The second law of thermodynamics has several implications, including the fact that energy in a closed system cannot be recycled or reused indefinitely, and that energy conversions will always be less efficient over time. It also explains why engines and power plants must have a source of heat, and why they can never be 100% efficient in converting heat into work.

Another important aspect of the second law of thermodynamics is that it places limits on the maximum efficiency of energy conversion processes. For example, it sets a limit on the maximum amount of energy that can be extracted from a heat source, such as a hot stove.

In conclusion, the second law of thermodynamics is a fundamental principle that describes the inevitable increase in entropy and loss of useful energy in closed systems over time. It has important implications for energy production, consumption, and conservation, and helps to explain why energy is always conserved and can never be created or destroyed.

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Answer:Fricition

Explanation: It is fricition in the net force

A car is speeding up with a force of 120 mph and heading east. The force of friction acts against the car with a force of 80 N westward, and the net force acting on the car is 40 N eastward, which means the car is accelerating eastward with a force of 40 N.

To calculate the net force acting on the car, one needs to consider the direction and magnitude of the forces acting on it. A force of 120 N to the east is acting to accelerate the car in that direction, and a force of 80 N to the west is acting to oppose the motion of the car.

Net force = force of acceleration -force of friction.

Net force = 120 N east- 80 N west.

Net force = 40 N East

Hence, the net force acting on the car is 40 N eastward, which means the car is accelerating eastward with a force of 40 N.

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Answer:

False

Explanation:

.......................

Answer:

An acid is a compound that increases hydrogen ions (H+) when it is dissolved in a solution.

all I got

By Using Euler's method with two steps, we can find the approximate value of Y(2) is 2.125. , where Y is the solution of the initial value problem dy/dx = x - y, and Y(1) = 3.

Euler's method is defined as a numerical technique which is  used to approximate solutions into ordinary differential equations. The method includes dividing the interval of interest into smaller steps and thereafter approximating the solution at each step by using the derivative of the function.

In this case, we are given the initial value problem dy/dx = x - y, with the initial condition Y(1) = 3. To approximate Y(2) using Euler's method with two steps, we will divide the interval [1, 2] into two equal steps.

Step 1:

We start with the initial condition Y(1) = 3. Using the differential equation dy/dx = x - y, we can approximate the value of Y at the midpoint of the interval [1, 2].

Using the step size h = (2 - 1) / 2 = 0.5, we can calculate Y(1.5) as follows:

Y(1.5) ≈ Y(1) + h × (x - y) = 3 + 0.5 × (1.5 - 3) = 3 + 0.5 × (-1.5) = 2.25

Step 2:

Now, using the value of Y(1.5) as the new approximation, we calculate Y(2) using the same process:

Y(2) ≈ Y(1.5) + h × (x - y) = 2.25 + 0.5 × (2 - 2.25) = 2.25 + 0.5 × (-0.25) = 2.125

Thus,  by using Euler's method with two steps, the approximate value of Y(2) is 2.125.

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The complete question is

Use Euler's Method With Two Steps To Approximate Y(2), Where Y Is The Solution Of The Initial Value Problem: Dy : X − Y, Y(1) = 3

Answer:

P=F/A =mg/A =pvg/A = pgh

Explanation:

pressure equals force per unit area.

force also equals mass ×gravity

mass can also be density ×volume

volume can also be area × height

area would cancel out the area

leaving pgh

A change in accounting principle refers to a change in the specific method, principle, or basis used to prepare financial statements.

Among the given options, the following would be accounted for as a change in accounting principle:

1. Switching from the cash basis of accounting to the accrual basis of accounting: The cash basis recognizes revenue and expenses when cash is received or paid, while the accrual basis recognizes revenue when earned and expenses when incurred.

2. Changing from FIFO (First-In, First-Out) method to LIFO (Last-In, First-Out) method for inventory valuation: FIFO assumes that the first items purchased are the first ones sold, while LIFO assumes that the last items purchased are the first ones sold.

3. Adopting a new revenue recognition standard: If a company adopts a new revenue recognition standard, such as transitioning from recognizing revenue at the point of sale to recognizing revenue over time, it would be considered a change in accounting principle.

4. Implementing a new depreciation method: If a company changes its depreciation method, such as switching from straight-line depreciation to accelerated depreciation , it would be considered a change in accounting principle.

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The above mentioned question is incomplete. The complete question is:

Which of the following is accounted for as a change in accounting principle?

A. Change in estimates

B. Change in accounting estimate

C. Change in accounting principle

D. Change in reporting entity

Answer:

Motion

Explanation: Enjoy! :)

Answer:

The big rig.

Explanation:

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

\( Momentum = mass * velocity \)

In this scenario, a motorcycle, a car, and a big rig are all moving with a velocity of 100 km/h. Thus, the vehicle which has the greatest momentum is the big rig because its mass is intuitively or logically greater than that of the other vehicle.

Generally, momentum is directly proportional to the mass of a physical object or body.

Answer: A large 18 wheeler truck.

Explanation: Momentum is the measure of the motion of an object found by multiplying the object’s mass and velocity. Momentum is directly proportional to the object's mass and also its velocity. So, the greater an object's mass or the greater its velocity, the greater its momentum. Therefore, since the truck is bigger, it has the greatest mass. This means that the truck the greatest momentum. Correct on Edg 2020.

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When we talk about pressure, it is essential to note that pressure is the force applied per unit area. The units for pressure are pascals (Pa). Here, we neglect air pressure.

We want to find the pressure at different depths of the ocean with a density of 1030 kg/m3 and gravity equal to 10m/s2.  We can use the formula P = ρgh to calculate pressure, where P is pressure, ρ is the density, g is the gravitational acceleration, and h is the height or depth. Let us find the pressure at each given depth.1. Pressure at a depth of 10 m: Using the formula, we have:P = ρgh= (1030 kg/m³) × (10 m/s²) × (10 m)P = 1.03 × 10⁵ PaTherefore, the pressure at a depth of 10 m is 1.03 × 10⁵ Pa.2. Pressure at a depth of 100 m: Using the same formula, we have:P = ρgh= (1030 kg/m³) × (10 m/s²) × (100 m)P = 1.03 × 10⁶ PaTherefore, the pressure at a depth of 100 m is 1.03 × 10⁶ Pa.3. Pressure at a depth of 1000 m: Again, using the same formula, we have:P = ρgh= (1030 kg/m³) × (10 m/s²) × (1000 m)P = 1.03 × 10⁷ PaTherefore, the pressure at a depth of 1000 m is 1.03 × 10⁷ Pa.4. Pressure at the bottom of the ocean (2000 m): Lastly, we use the same formula:P = ρgh= (1030 kg/m³) × (10 m/s²) × (2000 m)P = 2.06 × 10⁷ PaTherefore, the pressure at the bottom of the ocean (2000 m) is 2.06 × 10⁷ Pa.

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Answer:

earthquakes usually cause wide cracks in the earth's surface; landslides may also result from earthquakes

Explanation:

Any effects on the drink can be ascribed to the electrical charge rather than other factors by using an uncharged balloon that is handled the same way as the charged balloon (i.e., rubbed against the head).

For instance, when you rub a balloon against a jumper, some electrons are released and land on the balloon. The fibres now carry a positive charge since they have lost electrons. The rubber developed a negative electrical charge. The balloon now has a negative charge since electrons have a negative charge.

Insulating materials may become electrically charged when they come into contact with one another. Negatively charged electrons can "rub off" one material and "rub on" another. The substance gets a negative charge as it gains electrons. The substance that loses electrons has a positive charge remaining.

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The electric field strength is approx. 7.67 * 10^-5 V/m.

As we know, The electron drift velocity (vd) in a metal is related to the electric field strength (E) and the mean time between collisions (τ) by the equation:

vd = (qEτ) / m

where q is the charge of the electron, m is the mass of the electron, and τ is the mean time between collisions.

We can rearrange this equation to solve for E:

E = (vd * m) / (q * τ)

Plugging in the given values:

\(vd = 3.5 * 10^-4 m/s \\τ = 3.0 * 10^-14 s\\q = 1.6 * 10^-19 C (charge of an electron)\\m = 9.11 * 10^-31 kg (mass of an electron)\\E = (3.5 * 10^-4 * 9.11 * 10^-31) / (1.6 * 10^-19 * 3.0 * 10^-14)\\E = 7.67 * 10^-5 V/m\)

Therefore, the electric field strength is 7.67 * 10^-5 V/m.

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Mechanical energy is of two types,

1. Kinetic energy

2. Potential energy

When the girl is at the top of her jump, the speed of the girl becomes zero.

Thus, the kinetic energy of the girl at the top of her jump is,

where m is the mass of the girl and v is her speed,

Substituting the known values,

Thus, the kinetic energy of the girl is zero at the top of her jump.

The potential energy of the girl at the top of her jump is,

where g is the acceleration due to gravity and h is the height of the girl,

Thus, the potential energy of the girl at the maximum height is maximum.

Hence, the mechanical energy of the girl at the top is in potential energy form because her kinetic energy is zero at the top of her jump.

Electric field strength decreases as the distance from the source increases.

The strength of an electric field is inversely related to square of the distance from the source. This means that the electric field strength decreases when the distance from the source increases.

So we can conclude that Electric field strength decreases as the distance from the source increases.

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