Hey swimmer swim 50 m in 20 seconds what is their average velocity

Answer: STOP LOOKING FOR ANSWERS OMG:(((((9

Explanation:

Answer:

Yeast can use oxygen to release the energy from sugar (like you can) in the process called "respiration". ... So, the more sugar there is, the more active the yeast will be and the faster its growth (up to a certain point - even yeast cannot grow in very strong sugar - such as honey).

Answer:

The SI unit for intensity is watts per square meter (W/m2)

Answer: Because temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The zeroth law of thermodynamics says that no heat is transferred between two objects in thermal equilibrium; therefore, they are the same temperature.

Explanation:9 (- _ -)

Answer:

Volume of Sand = 0.4 m³

Radius of Sand Sphere = 0.46 m

Explanation:

First we need to find the volume of gold sphere:

Vg = (4/3)πr³

where,

Vg = Volume of gold sphere = ?

r = radius of gold sphere = 2 cm = 0.02 m

Therefore,

Vg = (4/3)π(0.2 m)³

Vg = 0.0335 m³

Now, we find mass of the gold:

ρg = mg/Vg

where,

ρg = density of gold = 19300 kg/m³

mg = mass of gold = ?

Vg = Volume of gold sphere = 0.0335 m³

Therefore,

mg = (19300 kg/m³)(0.0335 m³)

mg = 646.75 kg

Now, the volume of sand required for equivalent mass of gold, will be given by:

ρs = mg/Vs

where,

ρs = density of sand = 1602 kg/m³

mg = mass of gold = 646.75 kg

Vs = Volume of sand = ?

Therefore,

1602 kg/m³ = 646.75 kg/Vs

Vs = (646.75 kg)/(1602 kg/m³)

Vs = 0.4 m³

Now, for the radius of sand sphere to give a volume of 0.4 m³, can be determined from the formula:

Vs = (4/3)πr³

0.4 m³ = (4/3)πr³

r³ = 3(0.4 m³)/4π

r³ = 0.095 m³

r = ∛(0.095 m³)

r = 0.46 m

Answer: Neptune

Explanation:

Explanation:

neptune is correct

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Answer:

F (force) can be written F/L  = K I1 I2 where K is some constant

F1 = 4 F1    if I1 and I2 are each doubled

If both currents are doubled, the new force of attraction between the wires will be 0.4 mN.

The force of attraction between two parallel wires carrying equal currents is given by Ampere's law, which states that the force is directly proportional to the product of the currents and inversely proportional to the square of the distance between the wires. Given that the current in each wire is 10A and the force of attraction is 1mN, we can use this information to calculate the distance between the wires.

Let's assume the distance between the wires is "d".

Using the formula for the force of attraction between the wires:

F = (μ₀ * I₁ * I₂) / (2πd)

where F is the force, μ₀ is the permeability of free space, I₁ and I₂ are the currents, and d is the distance between the wires.

Rearranging the formula, we can solve for d: d = (μ₀ * I₁ * I₂) / (2πF)

We know that F = 1mN, I₁ = I₂ = 10A, and μ₀ = 4π x 10^(-7) N/A².

Substituting these values into the formula, we can find the distance between the wires:

d = (4π x 10^(-7) N/A² * 10A * 10A) / (2π * 1mN)

Simplifying the expression, we find: d = (4 x 10^(-6) N/A² * 100 A²) / (2 x 10^(-3) N)

d = 200 x 10^(-6) m

d = 0.2 mm

Now, if both currents are doubled to 20A, we can calculate the new force of attraction between the wires using the same formula:

F' = (μ₀ * I₁' * I₂') / (2πd)

where F' is the new force, I₁' and I₂' are the new currents, and d is the distance between the wires.

Substituting the values, we get: F' = (4π x 10^(-7) N/A² * 20A * 20A) / (2π * 0.2mm)

Simplifying the expression, we find: F' = (4 x 10^(-6) N/A² * 400 A²) / (4 x 10^(-4) N)

F' = 400 x 10^(-6) N

F' = 0.4 mN

Therefore, the new force of attraction between the wires will be 0.4 mN, if both currents are doubled.

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Explanation:

lol ....you are right.......

a) The capacitance of the ceramic capacitor is approximately 354.16 pF.

b) The potential difference between the plates of the capacitor will be approximately 3.39 x 10^6 volts.

To calculate the capacitance of the ceramic capacitor, we can use the formula:

C = (ε₀ * εᵣ * A) / d

where:

C is the capacitance,

ε₀ is the vacuum permittivity (approximately 8.854 x 10^(-12) F/m),

εᵣ is the relative permittivity of the ceramic (given as 100),

A is the effective plate area (given as 4 cm², which is equal to 4 x 10^(-4) m²),

d is the separation between the plates (given as 0.1 mm, which is equal to 0.1 x 10^(-3) m).

Let's calculate the capacitance in picofarads (pF):

a) Calculation of capacitance (C):

C = (ε₀ * εᵣ * A) / d

= (8.854 x 10^(-12) F/m * 100 * 4 x 10^(-4) m²) / (0.1 x 10^(-3) m)

= (8.854 x 100 x 4) / 0.1

= 354.16 pF

Therefore, the capacitance of the ceramic capacitor is approximately 354.16 pF.

b) To find the potential difference (PD) between the plates when the capacitor is given a charge of 1.2 μC (microcoulombs), we can use the formula:

PD = Q / C

where:

PD is the potential difference,

Q is the charge (given as 1.2 μC, which is equal to 1.2 x 10^(-6) C),

C is the capacitance (calculated in part a) as 354.16 pF, which is equal to 354.16 x 10^(-12) F).

Let's calculate the potential difference (PD):

b) Calculation of potential difference (PD):

PD = Q / C

= (1.2 x 10^(-6) C) / (354.16 x 10^(-12) F)

= 3.39 x 10^6 V

Therefore, the potential difference between the plates of the capacitor will be approximately 3.39 x 10^6 volts.

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Answer:

D) Thermal energy will move from the water bottle to the ice.

Explanation:

Overtime, what happens is that thermal energy will move from the water bottle to the ice.

The water bottle is at a higher temperature compared to the ice. So, thermal energy will move from a place at higher temperature to one with lower temperature.

Answer:

The second one is the answer

A 66.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.51 m/s. The nonconservative work done on the boy is approximately -42.7 kilojoules.

To find the nonconservative work done on the boy, we need to consider the change in the boy's mechanical energy during the process. Mechanical energy is the sum of the boy's kinetic energy (KE) and gravitational potential energy (PE).

The initial mechanical energy of the boy is given by the sum of his kinetic energy and potential energy when he catches the wave:

E_initial = KE_initial + PE_initial

The final mechanical energy of the boy is given by the sum of his kinetic energy and potential energy after he drops through the height:

E_final = KE_final + PE_final

The nonconservative work done on the boy is equal to the change in mechanical energy:

Work_nonconservative = E_final - E_initial

Let's calculate each term:

KE_initial = (1/2) * m * v_initial^2

= (1/2) * 66.1 kg * (1.60 m/s)^2

PE_initial = m * g * h_initial

= 66.1 kg * 9.8 m/s^2 * 1.59 m

KE_final = (1/2) * m * v_final^2

= (1/2) * 66.1 kg * (8.51 m/s)^2

PE_final = m * g * h_final

= 66.1 kg * 9.8 m/s^2 * 0

Since the boy ends at ground level, the final potential energy is zero.

Substituting the values into the equation for nonconservative work:

Work_nonconservative = (KE_final + PE_final) - (KE_initial + PE_initial)

Simplifying:

Work_nonconservative = KE_final - KE_initial - PE_initial

Calculating the values:

KE_initial = (1/2) * 66.1 kg * (1.60 m/s)^2

PE_initial = 66.1 kg * 9.8 m/s^2 * 1.59 m

KE_final = (1/2) * 66.1 kg * (8.51 m/s)^2

Substituting the values:

Work_nonconservative = [(1/2) * 66.1 kg * (8.51 m/s)^2] - [(1/2) * 66.1 kg * (1.60 m/s)^2 - 66.1 kg * 9.8 m/s^2 * 1.59 m]

Calculating the result:

Work_nonconservative ≈ -42.7 kJ

Therefore, the nonconservative work done on the boy is approximately -42.7 kilojoules. The negative sign indicates that work is done on the boy, meaning that energy is transferred away from the boy during the process.

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Answer:

Explanation:

These incident and reflected waves pass each other, going in opposite directions. Interference results in a standing wave, i.e., a stationary wave pattern equal to the sum of the incident and reflected waves.

the car will be more damaged and fly backward faster than the truck.

In an accident, the car will be more damaged and fly backward faster than the truck. This is because the car has less mass than the truck, so it will experience more force upon impact. Additionally, the car is moving at a faster velocity than the truck, which means that it will have more kinetic energy upon impact. Therefore, the car will be subjected to a greater force upon impact, which will cause more damage to the vehicle and cause it to fly backward faster than the truck.

It's important to note that this is a simplified analysis, and in reality, the outcome of the collision will depend on various factors such as the speed, direction, angle, and point of impact of the vehicles, the road conditions, the safety features of the vehicles, etc. A more accurate analysis would require detailed information and calculations of the specific variables involved in the accident.

Answer: The car will be more damaged and fly backward faster than the truck.

Explanation: In an accident, the car will be more damaged and fly backward faster than the truck. This is because the car has less mass than the truck, so it will experience more force upon impact. Additionally, the car is moving at a faster velocity than the truck, which means that it will have more kinetic energy upon impact. Therefore, the car will be subjected to a greater force upon impact, which will cause more damage to the vehicle and cause it to fly backward faster than the truck.

The physics behind the movement of electric charges between parallel plates is based on the principles of electrostatics. Electric charges are either positive or negative, and they are affected by electric fields.

Electric fields are created by a difference in electric potential, which is measured in volts. When a voltage is applied to a set of parallel plates, the charges within the plates will be affected by the electric field, and will move in response to it.

When a voltage is applied to a set of parallel plates, the positive charges in the plate connected to the positive voltage will be attracted to the negative voltage, while the negative charges in the plate connected to the negative voltage will be attracted to the positive voltage.

The movement of charges between the plates is also affected by the presence of any obstacles or resistances in the electric field, such as resistance in the wire. This can slow down the movement of charges and result in a decrease in the current flowing through the circuit.

In all, the movement of charges between electric parallel plates is the result of the electric field created by a difference in electric potential, and the movement of charges is called drift velocity. The movement is also affected by the presence of resistance.

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Answer:

sorry I don't really know about that question.

Explanation:

The temperature of the air mass when it has risen to a level at which atmospheric pressure is only 8.70×10⁴ Pa is approximately 14.3°C.

Using the ideal gas law, we can write: PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the absolute temperature. Since the mass of air is not changing, we can write: PV = constant.

Applying this to the situation where the air mass rises to a level where the pressure is 8.70×10⁴ Pa, we get:

Dividing the second equation by the first and using the fact that γ=Cp/Cv=1.40 for air, we get:

Solving for T2, we get:

Thus, the temperature of the air mass when it has risen to a level at which atmospheric pressure is only 8.70×10⁴ Pa is approximately 14.3°C.

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Answer:

Option (D)

Explanation:

Since acceleration of an object = Change in velocity with the change in time

a = \(\frac{v_2-v_1}{t_2-t_1}\) = \(\frac{\triangle v}{\triangle t}\)

Here \((v_1,t_1)\) and \((v_2,t_2)\) are the two points on the line on the graph.

Therefore, slope of the line will represent the acceleration (constant) at any point lying on the line.

For particle A,

Two points on the line are (0, 2) and (1, 0)

a = \(\frac{2-0}{0-1}\)

\(a_1\) = -2 meter per sec²

Similarly, for the particle B,

There are two points (0, 1) and (2, 0) on the line.

\(a_2\) = \(\frac{1-0}{0-2}\) = \(-\frac{1}{2}\)

\(a_2=-0.5\) meter per sec²

Therefore, at any moment of time acceleration of the particle A will be (-2) meter per sec² and for particle B will be (-0.5) meter per sec².

Option (D) will be the correct option.

The velocity of the car 1 can be seen from the calculation as 20 m/s West

A coordinate system or point of view used to observe motion is known as a frame of reference. It can be used as a guide when describing an object's position, speed, and acceleration. Different frames of reference may result in various motion observations.

The relative velocity is the velocity of an object or observer as observed from a particular frame of reference.

We can see that the velocity of the car 1 is;

45 m/s - 25 m/s

= 20 m/s West

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The height to which the object is lifted is 0.14 meters.The problem seems to involve the concept of work, potential energy, and equilibrium.

The upward force of 442N must be balanced by the downward force of the object's weight to maintain equilibrium. Assuming the object is stationary, we can equate the upward force to the weight of the object:

442N = weight of the object

Weight = m * g, where m is the mass of the object and g is the acceleration due to gravity (9.8m/s^2).

So, 442N = m * 9.8m/s^2

Solving for m, we get m = 45.10 kg.

Now, the work done by the applied force of 32N over a distance of 2m is given by W = F * d = 32N * 2m = 64 J (Joules).

As the object is lifted, its potential energy increases by the amount of work done on it. This potential energy is given by the formula:

Potential energy = m * g * h

where h is the height to which the object is lifted.

Equating the work done on the object to the increase in its potential energy, we get:

64 J = 45.10 kg * 9.8m/s^2 * h

Solving for h, we get h = 0.14 m (rounded to two decimal places).

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The electric power of an electric circuit with a current of 2.5 A and voltage of 120 V is 300 watts.

Electric power is the rate at which work has to be done or the energy is transformed into an electrical circuit to work. Power is a measure of how much energy is used in a span of time. The SI unit of power is watt (W). Power can be defined as the product of voltage and electric current.

P = VI

where, P is the power,

V is the voltage or potential difference,

I is the electric current

P = VI

P = 120 × 2.5

P = 300 watts

Therefore, the electric power in the circuit will be 300 watts.

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Answer:

Your power output as you climb the stairs is 300.92 Watts.

Explanation:

Power is the amount of work per unit of time that some object or system produces. Power is calculated by:

\(P=\frac{W}{t}\)

Power is measured in watts (W), equivalent to one joule (J) of work done per second (s).

Work is defined in physics as the force that is applied to a body to move it from one point to another. The work is calculated as the multiplication of the force by the distance:

Work = F*d

Newton's second law says that the acceleration of a body is proportional to the resultant of forces on the acting and inversely proportional to its mass. This is expressed by the equation:

F=m*a

In this case,  

considering that the force of gravity acting on you, the force is:

F=m*a= 72.5 kg * 9.8 \(\frac{m}{s^{2} }\) =710.5 N

The distance is the multiplication between the number of stairs and the height of the stairs in meters (18 cm= 0.18 m, being 100 cm= 1 m):

d = 40 * 0.18 m= 7.2 m

Then:

Work= 710.5 N* 7.2 m

Work= 5,115.6 J

So finally the power can be calculated as:

\(P=\frac{5,115.6 J}{17s}\)

P= 300.92 Watts

Your power output as you climb the stairs is 300.92 Watts.

The option that represents what the magnetic field look like above the North pole is an arrow that decreases as we go up and points up (E)

The magnetic field lines of a magnet point away from the north pole and towards the south pole. The field lines are strongest at the poles and weaken as you move away from the poles.

So, the arrow that represents the magnetic field above the north pole will be pointing up, but it will become smaller and smaller as you go up.

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Answer:

The maximum compression of the spring after the collision is 0.15 m

Explanation:  

Given data  

Mass of the block (m) = 0.80 kg  

Initial velocity (v) = 1.2 m/s  

Spring constant (k) = 50 N/m  

Find the maximum compression of the spring (x) after compression  

Potential energy of the spring = Kinetic energy of the block  

Kinetic energy of the block = 0.5 × (mv)²  

Kinetic energy of the block = 0.5 × (0.80 × 1.2)²  

Kinetic energy of the block =0.5 × 0.9216  

Kinetic energy of the block = 0.4608 ---------->(1)  

Potential energy of the spring = 0.5 × k × x²  

Potential energy of the spring = 0.5 × 50 × x²  

Potential energy of the spring = 25 x² ---------> (2)  

Equate (1) and (2)  

25 x² = 0.4608  

x² =  0.018432 m²  

x =0.1357 = 0.15 m  

Therefore the maximum compression of the spring after collision is 0.15 m

Answer:

Separation of the Earth into layers (crust, mantle, inner core, and outer core) was largely caused by gravitational differentiation (separating different constituents at temperature where materials are liquid or plastic, owing to differences in density) early in Earth's history.

Explanation:

hoped it helped!!

hi you need to stop it get some help okay hope that worked

The wavelength (in m) of the note middle "C" (frequency = 256 Hz) in the air at room temperature and pressure will be 1171875 m.

The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.

The relationship between the wave's wavelength, time, and speed is given as;

\(\rm \lambda = \frac{c}{v} \\\\ \rm \lambda = \frac{3 \times 10^8}{256} \\\\ \lambda=1171875 \ m\)

Hence the wavelength (in m) of the note middle "C" (frequency = 256 Hz) in the air at room temperature and pressure will be 1171875 m.

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The front of the truck is designed to crumple during a collision to absorb the impact energy, slow down the collision, and protect the well-being of the passengers. This design feature helps increase the collision time, reduce the forces acting on the passengers, and minimize the risk of severe injuries.

Danica observes a collision between two vehicles. She sees a large truck driving down the road. It strikes a small car parked at the side of the road. On colliding, the truck applies a force on the stationary car, and the stationary car applies an opposite force on the truck. The front of the truck is designed to crumple in order to absorb the impact energy and slow down the collision , which protects the well-being of the passengers.

During a collision, the principle of Newton's third law of motion comes into play. According to this law, for every action, there is an equal and opposite reaction. In the case of the collision between the truck and the car, the truck exerts a force on the car, pushing it forward, while simultaneously experiencing an equal and opposite force from the car.

The purpose of designing the front of the truck to crumple is to increase the collision time and absorb the kinetic energy. When the truck collides with the stationary car, the front of the truck deforms, crumples, and absorbs a significant amount of the impact energy. This process increases the time over which the collision occurs, reducing the forces acting on the passengers and minimizing the risk of severe injuries.

By allowing the truck to crumple, the kinetic energy of the collision is transformed into other forms, such as deformation energy and heat. This energy transformation helps protect the passengers by reducing the deceleration forces acting on them. It also helps prevent the transfer of excessive forces to the car's occupants and reduces the likelihood of severe injuries.

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