Temperature at which change of state occurs is... (science))

The correct answer is c. alpha particles. Radon is a radioactive gas that can be found in homes and buildings. It is detected through the measurement of alpha particles, which are emitted by the decay of radon atoms.

This measurement is usually done using a device called a radon detector, which can provide an accurate reading of the radon levels in a home. It is important to regularly test for radon in order to ensure that the levels are safe for occupants.

Radon is detected in a home through the measurement of alpha particles.

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(c) The potential energy at A is the same as the kinetic energy at B. So

m g h = 1/2 m v²

where m is the mass of the object at the end of the pendulum, g is the magnitude of the acceleration due to gravity, h is the height of the object at point A relative to B, and v is the object's maximum speed. So

(3.8 kg) (9.80 m/s²) h = 140 J

h = (140 J) / ((3.8 kg) (9.80 m/s²))

h ≈ 3.8 m

(f) You know the kinetic energy at B, so just solve for v :

140 J = 1/2 (3.8 kg) v²

v² = (280 J) / (3.8 kg)

v² ≈ 73.684 m²/s²

v ≈ 8.6 m/s

Answer:

P₄ + 3O₂ → 2P₂O₃

Explanation:

To balance an equation we take each element one by one on each side and balance their atoms.

Like P₄ (Tetraphosphorus) in the left side has 4 atoms of phosphorus.

While on the right side P₂O₃ (Diphosphorus Trioxide) has 2 Phosphorus atoms.

So place 2 as a coefficient in front of P₂O₃.

Now Phosphorus atoms (4 atoms) are balanced on each side.

Now number of Oxygen atoms in P₂O₃ = 2 × 3 = 6

On the left left side number of Oxygen atoms in O₂ = 2

To balance Oxygen atoms in each side, place 3 as a coefficient before O₂ on the left.

Therefore, balance equation will be,

P₄ + 3O₂ → 2P₂O₃

Answer:

a cell and connector ( wire)

Explanation:

types of circuit are

I. open

Ii. closed

About, Kuiper belt objects have been seen orbiting by Neptune, according to observations of these objects. forty thousand celestial units.

In contrast to rocks or other solid objects, Neptune has a core the size of Earth made of heated liquids, making it a gas giant like Jupiter and Saturn. Neptune's atmosphere is primarily made up of water, ammonia, and methane, same as that of Uranus, another "ice giant." Neptune's startling blue color is caused by methane.

It has a solid center the size of Earth covered in a dense fog comprising water, ammonia, and methane. Hydrogen, helium, plus methane make up its atmosphere. Neptune shares Uranus' blue tint thanks to the methane.

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The kinetic energy of a car with a mass of 1050kg and a velocity of 5m/s will be 13,125 joules or 13,125 kg⋅m2⋅s−2.

As we know, the formula to find the kinetic energy in a system is \(1/2 m v^{2}\) where m is the mass of the system and v is the given velocity at the moment. So , by putting the given data in the equation, we get :

⇒\(1/2mv^{2}\)

⇒1/2 x 1050 x 5 x 5

⇒525 x 25

⇒13,125

∴ The Kinetic energy of the car will be 13,125 Joules where joule is the SI unit of energy.

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Answer:

power

Explanation:

it helps to do work without power we cant do any things

The work in a 3rd lever is situated between the load and the pivot. Less effort is required to shift the weight if the pivot is near to it. The weight will travel a longer distance if the pivot is closer to the effort. 

Mechanical advantage is defined as a measure of the ratio of output force to input force in a system, It is used to analyze the forces in simple machines like levers and pulleys.

Mechanical advantage = output force(load) /input force (effort)

mechanical advantage  = velocity ratio ×Efficiency

A lever that swings around a fixed point is the basic component of a lever. The pivot of a lever is its fixed point. A lever, like other machines, facilitates labor by adjusting the force or the length across which the force is applied to the device.

Thus, we can say that the lever which makes our work easier only by accelerating the rate of work is

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The diameter of the aluminum wire that must be used for the laboratory experiment is approximately 2.57 millimeters.

To determine the diameter of the aluminum wire, we can use the formula for the resistance of a wire:

R = (ρ * L) / A,

where R is the resistance, ρ is the resistivity of aluminum, L is the length of the wire, and A is the cross-sectional area of the wire. We are given the values of R and L and need to find A.

First, we need to calculate the resistivity of aluminum at 20.0°C. The resistivity of aluminum at 20.0°C is approximately 2.65 x 10^-8 Ω·m.

Next, we rearrange the formula to solve for A:

A = (ρ * L) / R.

Substituting the given values, we have:

A = (2.65 x 10^-8 Ω·m * 32.0 m) / 2.50 Ω.

Calculating this expression, we find that A is approximately 3.392 x 10^-7 m².

The cross-sectional area of a wire is related to its diameter by the formula:

A = π * (d/2)^2,

where d is the diameter of the wire.

Rearranging this formula to solve for d, we get:

d = sqrt((4 * A) / π).

Substituting the value of A, we can calculate the diameter:

d = sqrt((4 * 3.392 x 10^-7 m²) / π) ≈ 2.57 mm.

Therefore, the diameter of the aluminum wire that must be used for the laboratory experiment is approximately 2.57 millimeters.

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The ball's momentum just before it hit the floor when it  has a mass of 280 g and a velocity of -2.5 m/s is  -0.7 kgm/s

The ball's momentum just before it hit the floor is equal to its mass multiplied by its velocity. The ball has a mass of 280 g and a velocity of -2.5 m/s just before it hits the floor (the negative sign indicates that the velocity is downward, in the opposite direction of the positive upward direction). Therefore, the ball's momentum just before it hit the floor is:

momentum = mass * velocity

= 280 g * (-2.5 m/s)

= -700 g*m/s

The units of momentum are typically expressed as kilogram meters per second (kg*m/s). To express the answer in these units, we can divide the mass in grams by 1000 to convert it to kilograms:

momentum = (-700 gm/s) / (1000 g/kg)

= -0.7 kgm/s

Thus, the ball's momentum just before it hit the floor was -0.7 kg*m/s.

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Total heat supplied to the system within this temperature range is 10040 J.

Heat refers to the energy that is released or absorbed during any chemical reaction.

Melting of the ice:

Amount of heat required to melt the ice is given by the equation: Q = mLf

Q is heat required, m is mass of the ice, and Lf is specific latent heat of fusion of water.

Q = (0.02 kg) × (3.34 × 10^5 J/kg)

Q = 6680 J

Therefore, the heat required to melt the ice is 6680 J.

Heating of the water:

Amount of heat required to raise the temperature of the water from 0°C to 40°C is given by the equation: Q = mcΔT

Q is heat required, m is mass of the water, c is specific heat capacity of water, and ΔT is change in temperature.

Q = (0.02 kg) × (4200 J/kg.K) × (40°C - 0°C)

Q = 3360 J

Therefore, heat required to heat the water from 0°C to 40°C is 3360 J.

Qtotal = Qmelting + Qheating

Qtotal = 6680 J + 3360 J

Qtotal = 10040 J

Therefore, total heat supplied to the system within temperature range is 10040 J.

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The following formula may be used to determine how large the electric field is within the aluminium wire:

E = J/σ

E, J, and are the electric field, the current density, and the conductivity of aluminium, respectively.

where A is the wire's cross-sectional area and I is the current.

The following formula may be used to get the cross-sectional area of the wire:

A = πr^2

where r is the wire's radius.

We obtain the following by substituting the aluminum's electrical conductivity value from the problem:

E = J/σ

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Metamorphic rock: A rock changed by heat, pressure, and fluids.

Foliation: Parallel alignment of platy grains.

Burial metamorphism: A process that changes rock because of pressure with equal intensity from all sides.

Parent rock: The original rock before it metamorphoses.

Metamorphic rock: A rock changed by heat, pressure, and fluids. The word metamorphic means change in form. Metamorphic rocks are made by rocks that have been altered in some way. This can happen through heat, pressure, and fluids. Examples of metamorphic rocks include slate, gneiss, and marble.

Foliation: Parallel alignment of platy grains. Foliation is a term used to describe the parallel alignment of platy grains in a metamorphic rock. This is caused by pressure during metamorphism. The platy grains can be minerals like mica or clay.

Burial metamorphism: A process that changes rock because of pressure with equal intensity from all sides. Burial metamorphism is a process that changes rock because of pressure with equal intensity from all sides. This can happen when rocks are buried deep within the earth's crust.

Parent rock: The original rock before it metamorphoses. The parent rock is the original rock before it metamorphoses. This rock is changed into a metamorphic rock through the process of metamorphism.

To summarize, metamorphic rock is a rock that has been changed by heat, pressure, and fluids. Foliation refers to the parallel alignment of platy grains. Burial metamorphism is a process that changes rock because of pressure with equal intensity from all sides. The parent rock is the original rock before it metamorphoses.

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While evaluating the timing of pitches, the researchers noticed a couple of high-performing athletes who were able to generate higher velocities by increasing the duration of their acceleration phase. The power production for these athletes was higher compared to those who were mentioned earlier.

The velocity of the pitch is generated by the angular velocity of the throwing arm and the linear velocity of the arm’s end. The throwing arm's angular velocity is achieved through a combination of forces generated by the muscles of the upper body, the linear velocity of the trunk, and the arm's rotational velocity.

Increasing the duration of the acceleration phase enables the athlete to generate higher angular velocities, resulting in higher linear velocities of the arm's end and thus higher ball velocities. Power production is directly proportional to ball velocity.

It has been shown that more extended acceleration phases lead to higher ball velocities. It is also critical to maintaining high accuracy while pitching. Because a pitcher has only about 200-250 milliseconds to throw the ball, the pitching motion's temporal structure is crucial.

Pitchers with higher levels of velocity production must maintain the same temporal structure, which implies that they must have more efficient movements to maintain high velocity without sacrificing accuracy.

In conclusion, the power production for the athletes who increased the duration of their acceleration phase was higher compared to those who were mentioned earlier.

The longer acceleration phase enabled them to generate higher angular velocities, resulting in higher ball velocities. It is also essential to maintain the same temporal structure while pitching, which requires efficient movements that maintain high velocity without sacrificing accuracy.

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222.22 m/s is how fast these waves are moving. Relationship between wave speed, wavelength, frequency, and period.

The equation wave speed = frequency x wavelength describes the relationship between wave speed, wavelength, frequency, and period.

Reason: A. Given that we are aware that the formula for calculating a wave's speed is:

v = f, where v is the wave's speed.

f = the wave's frequency

A wavelength is

Here, stands for the separation between adjacent wave crests.

f = 1/Time Period = (1/1 hr)(1 hr/3600 s) f = 2.77 x 104 s1 = 800 km = 8 x 105 m

Therefore,

v = (2.77 x 10⁻⁴ s⁻¹)(8 x 10⁵ m)

v = 222.22 m/s.    

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Answer:

welll

Explanation:

i honestly dk

Answer:

(4x - 1) (x - 7)

Explanation:

4x^2 - 29x + 7 = 0

(4*-7=-28) and: (1*- 1 = -1)

-28 - 1 = -29 and - 1 times -7 = 7

a) The center of mass is 28 cm from the 800 g ball. b) The rotational kinetic energy is 0.63 J if the structure rotates about its center of mass at 100 rpm.

To find the center of mass of the system, we need to consider the mass and position of each component. Since the rod is 40 cm long and has a mass of 200 g, we can treat it as a point mass located at its midpoint, which is 20 cm from each ball. The center of mass is then the weighted average of the positions of the three point masses. Using the formula for the center of mass, we find that the center of mass is 28 cm from the 800 g ball.To find the rotational kinetic energy, we need to know the moment of inertia of the system and the angular velocity. Since the system is rotating about its center of mass, we can use the parallel axis theorem to find the moment of inertia. The moment of inertia of the two balls is 0.14 kgm^2, and the moment of inertia of the rod is 0.004 kgm^2. The total moment of inertia is then 0.144 kg*m^2. Converting 100 rpm to radians per second, we get an angular velocity of 10.47 rad/s. Using the formula for rotational kinetic energy, we find that the rotational kinetic energy is 0.63 J.

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Answer:

D

Explanation:

Answer:

prism

Explanation:

(a) The minimum time interval needed before it can come to rest is t = 10.17 sec for a jet which is travelling at a a speed of 87 m/s, and its acceleration can have a maximum magnitude of 8.55 m/s2

(b) yes the jet can land on a small tropical island airport where the runway is 0.800 km long.

(c) The jet is safe to land.

Acceleration is the rate at which an object's velocity with respect to time changes. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration. According to Newton's Second Law, an object's acceleration is the result of two factors working together: the object's mass, which varies depending on the materials it is made of, and the net balance of all external forces acting on it. The magnitude of an object's acceleration is inversely proportional to the object's mass.

The SI unit for acceleration is \(m/sec^{2}\).

Use the formula to calculate the time required to stop the jet

v = u + at

0 = 87 + (-8.55)t

t = \(\frac{87}{8.55}\)

t = 10.17 sec

Use the following formula to calculate the distance travelled by the jet is,

\(x = ut + \frac{1}{2} at^{2}\)

= \(( 87 \times 10.17) + \frac{1}{2} (-8.55) (10.17)^{2}\)

= 884.79 - 884.31

=.48m

Yes, the can land on a small tropical island airport where the runway is 0.800 km long.

The jet is safe to land.

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Answer:

3.75 hours

Explanation:

By \(v = \frac{d}{t}\)

where v is the velocity (or speed in this case)

d is the distance travelled

t is the time taken

\(t = \frac{150}{40}=3.75\)
Therefore it takes 3.75 hours for the bus to travel 150 km and 40 km/hr.

A magnet will attract an ordinary nail or paper clip because they are made of ferromagnetic materials, which are materials that can be magnetized and are strongly attracted to magnets. When a magnet is brought near a ferromagnetic material, it creates a magnetic field within the material, causing the material to become magnetized and creating an attractive force between the two.

On the other hand, a wooden pencil is not a ferromagnetic material and is not attracted to magnets. Wood is composed mainly of non-magnetic materials such as cellulose, hemicellulose, and lignin, which are not affected by magnetic fields. Therefore, the magnet will not create a magnetic field within the pencil, and there will be no attractive force between the two.

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Answer:

72 meters

Explanation:

Breaking distance is directly proportional to the speed squared.

d = k v²

When v = 12 m/s, d = 32 m.

32 = k (12)²

k = 2/9

d = 2/9 v²

When v = 18 m/s:

d = 2/9 (18)²

d = 72

Answer:

The magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.

Explanation:

Let's think Newton's 2nd Law: F = ma.

We are given the mass of the ball: 219 g ⇒ .219 kg.

We are given the initial velocity, time, and final velocity of the ball ∴ we can solve for acceleration.

We are trying to find the force needed to stop the ball.

Let's find the acceleration of the ball first.

Now, we can plug these known values into this kinematic equation and solve for acceleration, a.

Substitute acceleration and mass into F = ma and solve for the force.

The magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.

The distance is not given, we cannot calculate the moment. Therefore, we cannot answer this question without more information.

Force is an interaction between two objects that causes a change in the motion of one or both objects. It is a vector quantity, meaning it has both magnitude and direction. Forces can be either contact forces, exerted when two objects come into direct contact, or non-contact forces, such as gravity, exerted even when the two objects are not in direct contact.

The moment of force (also known as torque) is equal to the magnitude of the force multiplied by the distance from the point of rotation. Since the magnitude of force is given, the moment about point A can be calculated as follows:
Moment = f×d
where f is the magnitude of the force (20 kn) and d is the distance from point A.
Since the distance is not given, we cannot calculate the moment. Therefore, we cannot answer this question without more information.

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Answer:

2as=v2-u2

2000=v2

V=44

V=u+at

44/10=t

T=4.4seconds

Explanation:

if you increase the pressure on a sprinkler nozzle from 46 psi to 66 psi, the new flow rate will be approximately 32.496 gallons per minute, assuming a flow rate coefficient (K) of 4.0.

Q = K * √(P)

where sqrt(P) is the square root of the pressure in psi.

Using this formula, we can calculate the new flow rate as follows:

New flow rate = 4.0 * √(66) = 4.0 * 8.124 = 32.496 gallons per minute (approx.)

Pressure is a physical quantity that describes the force exerted per unit area. It can be defined as the amount of force applied to a given area or surface. Pressure is typically measured in units of Pascals (Pa), which is equivalent to one Newton per square meter (N/m²).

Pressure can be exerted by any type of matter, including gases, liquids, and solids. For example, the pressure of the air around us is the result of the weight of the atmosphere pushing down on the surface of the Earth. In general, pressure increases with increasing depth in a fluid or with increasing force applied to a surface. It also varies with temperature and can be affected by the properties of the material being measured.

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To determine the greatest distance you can be from the base camp at the end of the third displacement, regardless of direction, we need more specific information about the magnitudes and directions of the displacements.

Displacement is a vector quantity that has both magnitude and direction. The distance covered during multiple displacements depends on the individual magnitudes and directions of each displacement. Without specific values, it is not possible to determine the exact greatest distance from the base camp.

If you provide the magnitudes and directions of the three displacements, I can help you calculate the total distance and determine the maximum possible distance from the base camp at the end of the third displacement.

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Answer:

D

Explanation:

Answer:

D

Explanation:

:p

Answer:

understand Newton's second law of motion,F is equal to ma where F is the force ,m is the mass of the object,a is acceleration