The two conditions that appear to be necessary for the generation of a powerful magnetic field in planets that are not present simultaneously on mercury are:______

Answer:

1st box: increase

supporting evidence: As the girl swings downward she will gain more height due to the increasing force pushing her

2nd box: increase

supporting evidence: the magnetic force of the earth will increase the kinetic energy of the girl when she goes downward slightly as she swings forward

3rd box :increase

supporting evidence:As the girl swings downward she will gain more speed due to the gravitational pull

Explanation:

Answer:

D

Explanation:

Answer:

588 J

Explanation:

P.E = mgh

      = 6 * 9.8 * 10

     = 588 J

if g value is rounded and taken as 10 then answer is 600 J.

Answer:

the Princess in "St. George and the Dragon"

Answer:

The princess in st. George and the dragon

Explanation:

Have a good day

Answer:

0.3kilowatts hours

Explanation:

If you bake a potato in a toaster oven that uses 1.2 kW and oven turned on for 25minutes, to get the amount in kilowatt hour, we will need to convert minutes to hour first

60minutes = 1hr

25minutes = x

60x = 25

x = 25/60 hr

x =

Multiply the time in hr with the power

Amount of kWhr used = 1.2 * 25/60

Amount of kWhr used = 30/60

Amount of kWhr used  = 0.3kilowatts hours

Hence it used 0.3kilowatts hours

Answer:

El equilibrio térmico se alcanzará a los 152ºC.

Explanation:

Dado que un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º, para determinar a qué temperatura se alcanza el equilibrio térmico se debe realizar el siguiente cálculo:

2+5 = 7

(200 x 5 + 32 x 2) / 7 = X

1064 / 7 = X

152 = X

Por lo tanto, el equilibrio térmico se alcanzará a los 152ºC.

Answer:

c

Explanation:

A shift inward of the production possibilities curve signifies that: C. The available production resources have decreased, so potential production levels will decrease.

A production possibilities curve (PPC) is also referred to as production possibilities frontier (PPF) and it can be defined as a curve that illustrates the maximum (best) combinations of two (2) products which can be produce in an economy if they both depend on these two (2) main factors;

Basically, the production possibilities curve (PPC) illustrates the maximum combinations of goods that are available with fixed technology and resources.

Furthermore, an inward shift of the production possibilities curve (PPC) signifies that the available resources used for production have decreased, so potential production levels would also decrease.

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The projectile Trajectory function calculates the trajectory of a projectile by computing 200 points for x, y and peak given initial velocity, angle and height.

The projectile Trajectory function is used to calculate the trajectory of a projectile, assuming ideal projectile motion (i.e., neglecting air resistance). This function computes 200 points for x, y, and peak based on the following inputs:

\(v_0\) = initial velocity, theta = angle of projection, \(y_0\) = initial height of the object.

The trajectory of the object is derived from basic physics and is given by the formula:

\(y = x * tan(theta) - (g * x^2) / (2 * v_0^2 * cos(theta)^2) + y_0\) where g is the acceleration due to gravity.

This formula is used to calculate the y-coordinate for each point along the x-axis. The maximum height of the trajectory (i.e., the peak) is also computed. The output of the function is x, y, and peak.

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The average intensity of the tone is 6.9×10^−14 W/m^2.The intensity of a sound wave is defined as the power per unit area and is given by I = P/A, where P is the power and A is the area.

The power of a sound wave is proportional to the square of the amplitude of the wave, and the area is proportional to the square of the displacement amplitude. Therefore, we can write I = kA^2ω^2, where k is a constant and ω is the angular frequency.

To find the value of k, we use the given information about the density of air and the speed of sound. The speed of sound in the air can be expressed as v = √(γP/ρ), where γ is the adiabatic index, P is the pressure, and ρ is the density of air. For air at room temperature and atmospheric pressure, γ is approximately 1.4. Using this formula, we can find the pressure of air to be about 101,325 Pa.

We can now find the value of k by using the given displacement amplitude and angular frequency. Substituting the values into the equation I = kA^2ω^2 and simplifying, we get k = ρv/2 = 1.17×10^-3 W/(m^2·s). Finally, substituting the values of k, ω, and A into the equation for intensity, we get an average intensity of 6.9×10^-14 W/m^2.

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Rotational inertia is similar to inertia in that both deal with an object's resistance to changes in motion. Torque affects rotation by causing a change in an object's rotational motion. Lever arm refers to the distance between the axis of rotation and the point where a force is applied to an object.

Inertia is the tendency of an object to remain at rest or in uniform motion unless acted upon by an external force. Similarly, rotational inertia is an object's resistance to changes in its rotational motion. Both types of inertia depend on the mass of the object and the distribution of that mass relative to the axis of rotation.

Torque is defined as the force applied to an object multiplied by the distance from the axis of rotation. The greater the torque applied to an object, the greater the change in its rotational motion.

For example, if a wrench is used to apply a torque to a bolt, the bolt will either start to rotate or its rotational speed will increase.

In general, torque causes an object to experience an angular acceleration in the direction of the torque.

The lever arm determines the amount of torque that can be applied to an object. The longer the lever arm, the greater the torque that can be applied to an object.

Similarly, the shorter the lever arm, the smaller the torque that can be applied to an object.

In general, the lever arm is an important factor in determining how much torque can be applied to an object.

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An automobile starter motor has an equivalent resistance of 0.0500 Ω and is supplied by a 12.0-V battery with a 0.0100-Ω internal resistance .

(a) The current to the motor can be calculated using Ohm's Law, where current (I) is equal to the voltage (V) divided by the resistance (R). In this case, the total resistance in the circuit is the sum of the equivalent resistance of the motor and the internal resistance of the battery. Thus, the current is 12.0 V / (0.0500 Ω + 0.0100 Ω) = 200 A.

(b) The voltage applied to the motor can be found by subtracting the voltage drop across the internal resistance of the battery from the battery voltage. Therefore, the voltage applied to the motor is 12.0 V - (200 A * 0.0100 Ω) = 10.0 V.

(c) The power supplied to the motor can be calculated using the formula Power = Voltage * Current. Therefore, the power supplied to the motor is 10.0 V * 200 A = 2000 W.

(d) When the battery connections are corroded and add 0.0900 Ω to the circuit, the total resistance becomes 0.0500 Ω + 0.0100 Ω + 0.0900 Ω = 0.1500 Ω.

Using the same calculations as before, the current, voltage, and power values would be recalculated based on the updated resistance.

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AP Physics 1 is a college-level introductory physics course designed to give high school students an understanding of the fundamental principles of physics.

The course covers topics such as mechanics, waves, thermodynamics, electricity, and magnetism. Students in AP Physics 1 learn to think critically and solve problems using scientific inquiry, experimentation, and analysis. The course is structured to provide students with hands-on laboratory experience and to develop their skills in using math and quantitative analysis to explain physical phenomena. At the end of the course, students take an exam that can qualify them for college credit and demonstrate their mastery of the concepts and skills covered in the course.

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An example of the scenario where Bob would need to calculate the net force will be when there's someone going down on a water slide.

The net force refers to the sum of the forces that act on an object. Net force is vital for the acceleration of mass.

For example, when we kick a football, the ball takes off and then moves through the air. In this case, a net force acts on the football.

Also, when there's someone going down on a water slide, the net force can be calculated.

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Answer:

I THINK THE ANSWER COULD BE B

Explanation:

The final velocity of rock 2 after the collision is <−31.4, 19.7, 15.6> m/s. It is known that the total momentum of a system of particles is conserved if there are no external forces acting on it. Thus, by applying the law of conservation of momentum we can find the final velocity of rock 2 after the collision.

Before the collision, the total momentum of the system is: p1 + p2where p1 and p2 are the momenta of rock 1 and rock 2 respectively. Therefore:p1 + p2 = m1v1 + m2v2where m1 and m2 are the masses of rock 1 and rock 2 respectively, v1 and v2 are their velocities just before the collision, and p1 and p2 are their momenta.In order to find the final velocity of rock 2, we can apply the law of conservation of momentum: p1 + p2 = p'1 + p'2where p'1 and p'2 are the momenta of rock 1 and rock 2 respectively just after the collision. We can solve for p'2 and then use it to find the final velocity of rock 2:p'2 = p1 + p2 - p'1.

We can calculate the momenta of rock 1 and rock 2 just before the collision: p1 = m1v1 = 10 kg <48, 45, -20> m/s = <480, 450, -200> kg·m/sp2 = m2v2 = 5 kg <-9, 5, 11> m/s = <-45, 25, 55> kg·m/s We can also calculate the momenta of rock 1 and rock 2 just after the collision:p'1 = m1v'1 = 10 kg <-10, 36, -5> m/s = <-100, 360, -50> kg·m/sp'2 = m2v'2where v'1 and v'2 are the velocities of rock 1 and rock 2 respectively just after the collision. We are asked to find the final velocity of rock 2, which is v'2. Thus, we need to solve for v'2 from the equation: p'2 = p1 + p2 - p'1 Substituting the values we have calculated:p'2 = <480, 450, -200> + <-45, 25, 55> - <-100, 360, -50>p'2 = <35, 115, -105> kg·m/s Now we can find the final velocity of rock 2:v'2 = p'2/m2 = <35, 115, -105> kg·m/s ÷ 5 kg = <7, 23, -21> m/s Therefore, the final velocity of rock 2 after the collision is <−31.4, 19.7, 15.6> m/s.

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Answer:

27.9617 mi/h

Explanation:

Speed= distance/time

S= 15000/1200

Answer:

hai >.<

Explanation:

Answer:

hello!

Explanation:

~evita

The velocity of the ball when it strikes the ground, given the data is 21.56 m/s

From the question given above, the following data were obtained:

The velocity of the ball when it strikes the ground can be obtained as illustrated below:

v = u + gt

v = 0 + (9.8 × 2.2)

v = 0 + 21.56

v = 21.56 m/s

Thus, the velocity of the ball when it strikes the ground is 21.56 m/s

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To take a photo of myself with a classic camera while standing 1.3 m from a mirror, I would need to choose a distance of 2.6 m. This is because the light that reflects off of me travels the same distance to the mirror as it does from the mirror to the camera. Therefore, the distance from the mirror to the camera needs to be twice the distance from myself to the mirror.

It is important to select the correct distance when using a classic camera to ensure that the subject is in focus. If the distance is too close or too far, the subject may appear blurry or out of focus.

When using a camera, the distance between the subject and the lens is a critical factor in determining the clarity and focus of the image. The distance affects the angle of view, depth of field, and the amount of light that enters the camera. Selecting the right distance for the subject can make a huge difference in the quality of the final image.

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Answer: 2.2 seconds!

Explanation:

The answer is approximately 2.2 seconds.

To find this, we can apply the equations of motion for a rolling sphere on an incline. Since the ball is starting from rest, its initial velocity is 0 m/s. We also know the angle of inclination (15.4°) and the distance the ball must travel (4.4m).

Using the equations of motion, we can solve for the acceleration of the ball, which is given by:

a = g*sin(θ)

where g is the acceleration due to gravity (9.81 m/s2) and θ is the angle of inclination (15.4°).

So, the acceleration of the ball is:

a = 9.81 * sin(15.4°) = 3.15 m/s2

Now we can use the equations of motion to solve for the time it will take for the ball to travel the 4.4m.

The equation for displacement is given by:

x = 1/2 * a * t^2

Where x is the displacement (4.4m in this case), a is the acceleration (3.15 m/s2) and t is the time.

Rearranging the equation to solve for t, we get:

t = sqrt(2x/a)

Substituting in the values for x and a, we get:

t = sqrt(2*4.4/3.15) = 2.2 s

Therefore, it will take the basketball approximately 2.2 seconds to roll 4.4m down the incline.

The best way to describe sound levels is through a ratio scale.

The decibel scale, which measures sound levels, is best described as a ratio scale. While the decibel scale is logarithmic, it can be transformed into a linear ratio scale by using a reference point. By selecting a reference point as the softest sound the human ear can hear unaided (0 dB), we establish a meaningful zero point on the scale. Any sound level above this reference point can be expressed as a positive value, indicating its magnitude relative to the softest audible sound. The logarithmic nature of the decibel scale still holds, with each increase of 10 dB representing a tenfold increase in sound intensity. However, by anchoring the scale to a fixed reference point, we can now quantify and compare sound levels in a meaningful way, making it a ratio scale.

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The maximum EMF induced in the coil by the Earth's magnetic field is zero.

We can use Faraday's law of electromagnetic induction to calculate the maximum EMF induced in the coil by the Earth's magnetic field. Faraday's law states that the EMF induced in a coil is equal to the rate of change of the magnetic flux through the coil.

Assuming the loop is a circle of radius r, the magnetic flux through the loop due to the Earth's magnetic field is given by:

Φ = B * A * cosθ

where B is the horizontal component of the Earth's magnetic field, A is the area of the loop, and θ is the angle between the normal to the loop and the direction of the magnetic field. Since the loop is lying flat on the ground, θ = 0, and cosθ = 1.

The area of a circle is A = π\(r^2\), so we have:

Φ = B * π\(r^2\)

The rate of change of the magnetic flux through the loop is given by the time derivative of Φ:

dΦ/dt = d(B * π\(r^2\))/dt = π\(r^2\) * dB/dt

Since the horizontal component of the Earth's magnetic field is constant, dB/dt = 0, so the rate of change of the magnetic flux is zero.

Therefore, the maximum EMF induced in the coil by the Earth's magnetic field is zero.

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Answer:

it takes 64 J of heat energy to heat 2 kg of lead from 265 K to 315 K.

Explanation:

To find out how much heat is needed to heat 2 kg of lead from 265K to 315 K, we can use the formula for specific heat capacity, which is:

q = mcΔT

Where:

q = heat energy (in joules)

m = mass of the substance (in kilograms)

c = specific heat capacity of the substance (in joules per kilogram per degree Celsius)

ΔT = change in temperature (in degrees Celsius)

The specific heat capacity of lead is 0.128 J/g°C. we need to convert it to J/kg°C

So, the heat energy needed is:

q = (2 kg)(0.128 J/kg°C)(315 K - 265 K)

q = (2 kg)(0.128 J/kg°C)(50 K)

q = 64 J

Therefore, it takes 64 J of heat energy to heat 2 kg of lead from 265 K to 315 K.

If you double the mass of an object while keeping the acceleration constant, you will double the force on the object.

According to Newton's second law of motion, the force acting on an object is directly proportional to the product of its mass and acceleration. Mathematically, this relationship is expressed as F = m * a, where F is the force, m is the mass, and a is the acceleration.When the acceleration is held constant and the mass is doubled, the force on the object will also double. This can be understood by rearranging the equation to F = (m * a) / 2 and observing that the acceleration remains unchanged while the mass is doubled. As a result, the force must also double to maintain the balance of the equation.
Therefore, doubling the mass of an object while keeping the acceleration constant will double the force on the object.

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Answer:

Kinetic energy is the energy of motion

Answer:

A

Explanation:

Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Also remember to rate answers to help other students, While leaving thanks to answers that help you. Have a great day!

A cool region underneath cloud cover will have a higher pressure than the surrounding region without cloud cover.

Cloud cover is typically associated with the presence of moisture in the atmosphere, which leads to cooler temperatures in that region. Cooler air has a higher density compared to warmer air, resulting in a higher atmospheric pressure. Therefore, the cool region underneath cloud cover will have a higher pressure than the surrounding region without cloud cover.

The cooling effect occurs because clouds reflect a significant amount of sunlight back into space, preventing it from reaching the Earth's surface. This reduces the amount of solar radiation absorbed by the surface and the lower atmosphere. As a result, the air temperature in the region with cloud cover is lower than the surrounding areas.

The temperature difference between the cool region under cloud cover and the surrounding region creates a pressure gradient. Air tends to flow from areas of higher pressure to areas of lower pressure, resulting in a movement of air towards the cool region. This movement can lead to the mixing of air masses and the redistribution of moisture, affecting weather patterns in the vicinity of the cloud-covered region.

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Answer:

C would be the correct answer

Answer:

It has to have a whistle device on the spout. When boiling occurs, water vapour displaces air above the water which has to escape through the whistle hence activating the required vibrations. Thereafter, the continuing supply of steam does the same job until the cook involves turns off the heat. The whistle is not made to exacting scientific standards and there is no doubt a range of pressures above which it will work it. It would be interesting to know how you observed the water boiling without using a transparent kettle.

Explanation:

hope it helps