Based on what we know about our own solar system, the discovery of hot Jupiters came as a surprise to scientists because these planets are __________.
so close to their stars

For a rectangular storage tank filled with paraffin to a depth of 2 m, the volume, weight, mass of paraffin, and pressure at the bottom of the tank are:

a. The volume is 24 m³.

b. weight is 240,000 N,

c. mass is 24,490 kg, and

d. pressure is 23,530 Pa.

a) The volume of paraffin in the rectangular storage tank can be calculated using the formula:

Volume = Length x Width x Depth

Given:

Length = 4 m

Width = 3 m

Depth = 2 m

Substituting the values into the formula, we have:

Volume = 4 m x 3 m x 2 m

Volume = 24 m³

Therefore, the volume of paraffin in the tank is 24 cubic meters.

b) The weight of the paraffin can be calculated using the formula:

Weight = Volume x Density x Acceleration due to gravity

The density of paraffin varies, but we can assume a typical value of 10,000 kg/m³. The acceleration due to gravity is approximately 9.8 m/s². Substituting these values into the formula:

Weight = 24 m³ x 10,000 kg/m³ x 9.8 m/s²

Weight = 240,000 N

Therefore, the weight of the paraffin in the tank is 240,000 Newtons.

c) The mass of the paraffin can be calculated using the formula:

Mass = Density x Volume

Substituting the given values:

Mass = 10,000 kg/m³ x 24 m³

Mass = 24,490 kg

Therefore, the mass of the paraffin in the tank is 24,490 kilograms.

d) The pressure at the bottom of the tank due to the paraffin can be calculated using the formula:

Pressure = Weight / Area

The area of the bottom of the tank is equal to the length multiplied by the width. Substituting the values:

Area = 4 m x 3 m

Area = 12 m²

Pressure = 240,000 N / 12 m²

Pressure = 20,000 Pa

Therefore, the pressure at the bottom of the tank due to the paraffin is 20,000 Pascals (Pa).

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The net electric field at point P is 3.2×10^6 N/C, directed towards the left.

To calculate the net electric field at point P due to charges A and B, we need to consider the vector sum of the electric fields produced by each charge individually.

Given:

Electric field due to charge A: E_A = 8.7×10^6 N/C

Electric field due to charge B: E_B = 5.5×10^6 N/C

Since electric field is a vector quantity, we need to consider both magnitude and direction. Let's assume that the electric field due to charge A points to the left and the electric field due to charge B points to the right.

To find the net electric field at point P, we can subtract the magnitudes of the electric fields since they are acting in opposite directions:

Net electric field at point P = |E_A| - |E_B|

Substituting the given values, we get:

Net electric field at point P = 8.7×10^6 N/C - 5.5×10^6 N/C

                           = 3.2×10^6 N/C

Therefore, the net electric field at point P is 3.2×10^6 N/C, directed towards the left.

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Answer:  1. The function of a lightning rod is to protect buildings, structures, and people from lightning strikes by providing a path of least resistance for the electrical current to follow, directing it safely into the ground instead of through the structure or people.

2. Charge build-up is reduced on airplanes through various methods, such as using conductive materials in the airplane's structure, applying anti-static coatings on the airplane's surface, and installing static discharge wicks or similar devices on the airplane's trailing edges, which provide a way for any accumulated charge to safely dissipate into the air.

3. A ground strap is a necessary safety feature when transferring fuel because it provides an electrical connection between the fuel container and the receiving container, allowing any static charge to safely dissipate into the ground. Without a ground strap, the static charge could build up and potentially ignite the fuel.

4. Three different methods for reducing charge build-up in clothes dryers are: (1) using dryer sheets or fabric softeners, which can help neutralize static charges on the clothes, (2) adding a damp cloth to the dryer, which can help dissipate static charges, and (3) using metal dryer balls, which can physically separate clothes and prevent them from rubbing against each other and creating static charges.

5. Four different methods for reducing charge build-up in a computer room with a carpet are: (1) using conductive flooring or carpet tiles that can help dissipate static charges, (2) using anti-static mats or wrist straps for personnel who work in the room, (3) using air ionizers or humidifiers, which can help neutralize static charges in the air, and (4) grounding all equipment and devices in the room to prevent the buildup of static charges.

Explanation:

I hope this helps!

By definition the dipole moment, μ, is the product of the magnitude of the separated charge and the distance of the separation:

so:

Answer: 1.348 meters

Explanation: Although the sign is missing from the location of the 4.00 kg object, it is assumed to be positive. The net moment of all the objects about the center of mass must be zero. Let the center of mass be on the y axis at a point  c . Adding the four moments together, we get:

(2.00)(3.00−c)+(3.00)(2.50−c)+(2.50)(0−c)+(4.00)(0.500−c)=0

6.00−2.00c+7.50−3.00c+0−2.50c+2.00−4.00c=0

11.5c=15.50

c=  1.348 metres

The center of mass is on the y axis at  y  = 1.348 metres.

Answer: Fitness assessments are designed to screen for risk of heart disease.

Explanation:

Fitness assessments are medical examinations that are designed to measure a person's physical fitness and identify any health risks they may have. These assessments may include tests of strength, endurance, flexibility, and cardiovascular fitness. One of the primary objectives of a fitness assessment is to screen for the risk of heart disease, which is a major health concern that can be prevented or treated through exercise and other lifestyle changes. While fitness assessments may identify specific injuries or medical conditions, their primary focus is on evaluating a person's overall health and fitness.

Answer:

A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.

Explanation:

Answer:

Yes, as today human activities are the main cause for climate change.

In recent years, due to the over-consumption of primary sector products, the reckless over-consumption of natural resources and the increase of the earth's population, the natural environment has deteriorated, resulting in an imbalance between the countries of the developed and developing world in terms of climatic and environmental security. The global purpose of states, institutions and associations is to work together for sustainable development at all geographical levels and to fight inequality at the international level. At the same time, it is characteristic that a global movement has developed to demand the equal distribution of environmental burdens and climate justice.  

Answer:

D: keeping voltage constant and increasing resistance.

Explanation:

The current in an electrical circuit is determined by Ohm's law, which states that the current is directly proportional to the voltage and inversely proportional to the resistance.

Mathematically, Ohm's law can be expressed as:

I = V/R

where I is the current, V is the voltage, and R is the resistance.

We need to make sure that the right-hand side of the equation remains constant to keep the current in the circuit the same. Therefore, we can look at each set of changes and see how they affect the right-hand side of the equation.

A. Decreasing voltage and keeping resistance constant:

B. Increasing voltage and increasing resistance:

C. Increasing voltage and keeping resistance constant:

D. Keeping voltage constant and increasing resistance:

So, the correct answer is D: keeping voltage constant and increasing resistance.

Answer:

I think its B..kindly correct me if am not right

Based on the grid shown, the x component of the vector A is 3.

The given grid is a 10 by 10 grid, this means that every box in the grid has a length of 1 unit on all sides.

Thus, the x and y components of the vectors can be determined.

The x and y components of vector A is 3 and 3 respectively.

Therefore, based on the grid shown, the x component of the vector A is 3.

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The net electric force on particle 2 is -21.7 N.

The net force on particle q₂ is determined by applying Coulomb's law of electrostatic force.

F = kq₁q₂ / r²

where;

The force  between particle 2 and particle 1 is calculated as;

F = -( 9 x 10⁹ x 8 x 10⁻⁶ x 3.5 x 10⁻⁶ ) / (0.1)²

F = - 25.2 N

The force  between particle 2 and particle 3 is calculated as;

F = ( 9 x 10⁹ x 2.5 x 10⁻⁶ x 3.5 x 10⁻⁶ ) / (0.15)²

F = 3.5 N

The net force on particle 2 = 3.5 N - 25.2 N = -21.7 N

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Answer: 9.42

Explanation: yes

Answer:

true

Explication:

The acceleration of an object depends on the mass of the object, and the amount of force applied

In Coulomb's law, if one of the charges is doubled while the other remains the same, the magnitude of the force will also double, since the force is directly proportional to the product of the charges.

Coulomb's Law describes the electrostatic force between two charged particles. The force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Mathematically, Coulomb's Law can be expressed as:

F = k * (q1 * q2) / r^2

where F is the force between the charges, q1 and q2 are the magnitudes of the charges, r is the distance between them, and k is the Coulomb constant.

If one of the charges is doubled while the other remains the same, the magnitude of the force will also double, since the force is directly proportional to the product of the charges. Therefore, the new equation for the magnitude of the force in this scenario would be:

F' = k * (2q * q) / r^2 = 2 * (k * (q * q) / r^2) = 2F

where F' is the new force and F is the original force. So, when one of the charges is double, the magnitude of the force in Coulomb's Law will also double.

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First option is correct.Larry the Rock is going through Static Equilibrium.

In this situation, Larry is at rest and remains stationary despite the forces acting on him. While David and Pancho are exerting equal forces from opposite sides, their forces cancel each other out, resulting in a net force of zero. As a result, Larry does not move or experience any acceleration.

Static equilibrium occurs when an object's forces and torques balance each other, leading to a stable, balanced state. In this case, the forces exerted by David and Pancho are equal in magnitude and opposite in direction, creating a condition where the resultant force is zero. As a result, Larry remains in a state of rest, unable to experience any movement or acceleration.Therefore, the type of equilibrium that Larry the Rock is going through is Static Equilibrium.

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Answer:

The work done on the canister is 15.34 J.

Explanation:

Given;

mass of canister, m = 1.9 kg

magnitude of force acting on x-y plane, F = 3.9 N

initial velocity of canister in positive x direction, \(v_i\) = 3.9 m/s

final velocity of the canister in positive y direction, \(v_j = 5.6 \ m/s\)

The change in the kinetic energy of the canister is equal to net work done on the canister by 3.9 N.

ΔK.E = \(W_{net}\)

ΔK.E \(= K.E_f -K.E_i\)

The initial kinetic energy of the canister;

\(K.E_i = \frac{1}{2} mv_i^2\\\\K.E_i = \frac{1}{2} m(\sqrt{v_i^2 +v_j^2 + v_z^2}\ )^2\\\\K.E_i = \frac{1}{2} *1.9(\sqrt{3.9^2 +0^2 + 0^2}\ )^2 = 14.45 \ J\)

The final kinetic energy of the canister;

\(K.E_f =\frac{1}{2} mv_j^2 \\\\K.E_f = \frac{1}{2} m(\sqrt{v_i^2 +v_j^2 + v_z^2}\ )^2\\\\K.E_f = \frac{1}{2} *1.9(\sqrt{0^2 +5.6^2 + 0^2}\ )^2 = 29.79 \ J\)

ΔK.E = 29.79 J - 14.45 J

ΔK.E = \(W_{net}\) = 15.34 J

Therefore, the work done on the canister is 15.34 J.

a) The average density of the block can be calculated using the formula for density.Since the mass of the block is 1.80 N and the volume is 2.0 × 10∧5 \(m^{3}\), the average density is 0.9 kg/\(m^{3}\).

Mass is a measure of the amount of matter contained in an object. It is a fundamental physical property that is commonly used to measure the size of objects. Mass is usually measured in grams (g) or kilograms (kg) but can also be measured in other units such as ounces, pounds and tons. Mass is different from weight, which is a measure of the force of gravity on an object.

b) The normal force the floor of the vessel exerts on the submerged body can be calculated using the formula for buoyancy. In this case, the normal force is equal to 1000 kg/\(m^{3}\) × 2.0 × 10∧5 \(m^{3}\)× 9.81 m/\(s^{3}\), which is equal to 1.962× 10∧8 N.

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Answer:

Answer is as follow:

Explanation:

With a distance of just 6,792 km, Mars is even smaller. And again, Venus would be almost Earth's double in terms of scale. It has 81 percent of the earth 's volume, while Mars has just 10 percent of the earth 's mass. Mars and Venus have very different ecosystems, and they are both very separate from Earth.

Answer:

D

Explanation:

the answer is d because process of genetic recombination in bacteria in which genes from a host cell (a bacterium) are incorporated into the genome of a bacterial virus (bacteriophage) and then carried to another host cell when the bacteriophage initiates another cycle of infection

Answer:

True

Explanation:

I am not 100% on the answer for this question but i hope it was right

Pushing is a force so that statement is true

The number of revolutions is 102.655 it makes during this motion, assuming no slipping.

V= u+ at

24.8= 0 + a× 10.1

a= (24.8/10.1) m/s²

s= ut +1/2at² = at²/2

= 24.8/10.1×2 × 10.1²

=125.24m

Circumference of tire = πd. =. 3.14 × 0.389= 1.22

Total revolution= 125.24/ 1.22 = 102.655

What is acceleration?

The measurement of a change in velocity called acceleration. Acceleration typically indicates a change in speed, albeit not necessarily. An object moving in a circular path at a constant speed is still moving forward because the direction of motion is shifting. Acceleration is the rate at which an object's velocity varies in relation to time in physics. Newton's Second Law states that an object accelerates as a result of the total of all the forces acting on it. The SI system uses the meter per second squared (m s2) as the measure of acceleration.

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Based on the diagram, the correct statement is: Government and consumers make economic decisions in a mixed economy, while consumers make economic decisions in a market economy.

In a mixed economy, economic decisions are made by both the government and consumers.

The government plays a significant role in regulating and influencing economic activities through policies, regulations, and interventions.

In market economy, economic decisions are primarily made by consumers. The market forces of supply and demand dictate the allocation of resources, production levels, and pricing.

The freedom to buy and sell whatever they choose is what ultimately determines how commodities and services are produced and distributed.

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Answer:

1.6 time constants must elapse

Explanation:

voltage on a cap, charging is given as

v = v₀[1–e^(–t/τ)]

Where R is resistance in ohms,

C is capacitance in farads

t is time in seconds

RC = τ = time constant

v = v₀[1–e^(–t/τ)]

1–e^(–t/τ) = 0.8

e^(–t/τ) = 0.2

–t/τ = –1.609

t = 1.609τ

Answer:

90.3125 m

Explanation:

\(s = ut + \frac{1}{2} a {t}^{2} \)

a = 10m/s^2 (constant)

S=height

U=initial velocity

a= gravitational acceleration

t= time

s = 0 + 1/2 * 10 * 4.25 ^2

u is 0 because it is dropped without velocity

s =90.3125 m

Answer:

0.41s

Explanation:

solve for t and y

,........

Answer:

L=mvr

α=0

v=ωr

L=mωr

2

2

1

mv

2

=k

L=Iω

k=

2

1

Iω

2

ω

1

=2ω

k

1

=1/2k

∴I

1

=

8

1

I

L

1

=

8

1

I×2ω

=

4

1

Iω

=L/4

Physical motion that occurs when an item rotates or spins on an axis is known as “rotatory motion,” sometimes known as “rotational motion” or “circular motion.”

Angular displacement per unit of time is measured by angular frequency, also referred to as radial or circular frequency (). Therefore, it has degrees (or radians) per second as its units. 1 Hz = 6.28 rad/sec, thus. 1 radian equals 57.3° because 2 radians equal 360°.

The frequency of rotation is the rate at which an item rotates around an axis, sometimes referred to as rotational speed or rate of rotation.

However, the linear velocity also depends on how far the particles are from the axis of rotation. Because every particle distances are different, so too will the linear velocities for each particle.

Therefore, All the particles in a rigid body's rotational motion move in the same direction in a given interval. Therefore, all the particles' angular velocities will be the same.

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Answer:

Explanation:

because at that point it is further away from the sun