show an example of the method described above. ii. why might your calculated value for the half-life of barium-137 from this method differ from the accepted value?

Answer: the angular velocity of a particle at the Earth's surface is approximately 7.27 x 10^-5 rad/s, and the linear velocity of the particle is approximately 464.1 m/s.

Explanation:

Answer:

Value of Q when W = 288 is 192

Explanation:

Given that;

q varies as w [Using ratio property]

Given that value of q = 24

And value of w = 36

Find:

Value of Q when W = 288

Computation:

If Q varies as W

So their ratio must be same

So, using ratio property for find factor

q / w = Q / W

24 / 36 = Q / 288

Q = [24 x 288] / 36

Q = 6,912 / 36

Value of Q when W = 288 is 192

Geothermal energy can be used only if an energy source is present.

Mining is required to use geothermal energy.

The depth of mining increases earthquake risk.

Thus, it is difficult to find geothermal energy sources that are close to the surface.

Answer:

P V = N R T     ideal gas equation

P2 / P1 = T2 / T1       where the other variables are constant

P2 = (T2 / T1) * P1 = (313 / 293) * 40 psi = 42.7 psi

In order to determine the distance traveled by the car, use the followin formula from kinematics:

where,

vo: initial speed = 25.21m/s

t: time = 4.36s

a: acceleration = ?

x: distance = ?

To calculate the distance x it is necessary to calculate the deceleration of the car. Use the following formula:

Then, replace the values of t, vo and a into the expression for x and simplify:

Hence, the distance traveled by the car before it stops is approximately 54.98m

The energy present in pond water and kerosene are potential energy and chemical energy respectively.

Energy is a quantifiable quantity in physics that can be transferred from an item to do work. Thus, we might characterise energy as the capacity to engage in any kind of physical action. So, to put it simply, we can define energy as: Energy is the capacity to carry out work.

Energy "can neither be created nor destroyed but can only be changed from one form to another," according to the rules of conservation of energy. The SI unit for energy is called a joule.

In pond, water is stored during rain and stored potential energy whereas in kerosene, carbon molecules have chemical energy and when it burns, chemical energy revels as thermal energy.

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Answer:

108 m

Explanation:

The time it takes to cross the river is:

(30 m) / (0.83 m/s) ≈ 36.1 s

The distance traveled parallel to the river is:

(36.1 s) (3 m/s) ≈ 108 m

He would be 108.433 meters down from the initial target.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

speed = total distance /Total time

As given in the problem, if a  person swims directly across a 30m wide river towards a target location. The person swims at 0.83 m/s and the river flows at 3 m/s.

The time taken by the person to cross the river = 30 meters / 0.83 m / s

                                                                               =36.144 seconds

The distance from the initial position = 36.144 × 3

                                                             =108.433 meters

Thus,the person swimming would be 108.433 meters away from the initial position.

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Answer: The Answer is C

Explanation:

I just got this question and took a guess I got it correct lol. Higher potential energy and energy is released.

The statement which best describes the total energy change of the system is energy is absorbed, and the reactants have higher potential energy.

Potential energy is the energy which a body posses because of its position. The potential energy is the stored energy.

The energy diagram shows the changes in energy during a chemical reaction.

Potential energy and Reaction progress are shown in the problem. The reactants are the substance which reacts and form one or more than one product.

The reactants in a chemical reaction increases the potential energy for the reaction.



Thus, the statement which best describes the total energy change of the system is energy is absorbed, and the reactants have higher potential energy.

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The acceleration of the car assuming it to be uniform​ is 2 m/s².

Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.

Calculation:-

mass = 1100 Kg

initial velocity = 0

final velocity = 40 m/s

time = 20sec

v = u + at

40 = 0 a × 20

a = 2 m/s²

Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.

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Answer:

protons are in the nucleus .

Explanation:

there are 6 protons

Explanation:

Here is the first one....you should try the second one...

5.1 m

Explanation:

Let's set the ground as our reference point. Let's also call the dropped ball to be ball #1 and its height above the ground at any time t is given by

\(y_1 = 10 - \frac{1}{2}gt^2\) (1)

where 10 represents its initial height or displacement of 10 m above the ground. At the same time, the displacement of the second ball with respect to the ground \(y_2,\) is given by

\(y_2 = v_0t - \frac{1}{2}gt^2\) (2)

At the instant the two balls collide, they will have the same displacement, therefore

\(y_1 = y_2 \Rightarrow 10 - \frac{1}{2}gt^2 = v_0t - \frac{1}{2}gt^2\)

or

\(v_0t = 10\:\text{m}\)

Solving for t, we get

\(t = \dfrac{10\:\text{m}}{v_0} = \dfrac{10\:\text{m}}{10\:\text{m/s}} = 1\:\text{s}\)

We can use either Eqn(1) or Eqn(2) to hind the height where they collide. Let's use Eqn(1):

\(y_1 = 10\:\text{m} - \frac{1}{2}(9.8\:\text{m/s}^2)(1\:\text{s})^2\)

\(\:\:\:\:\:\:\:= 5.1\:\text{m}\)

The energy efficiency of the car is approximately 16.7%.

The energy efficiency of a car is the ratio of the useful work output (in this case, the kinetic energy of the car) to the total energy input (in this case, the energy released by burning the gasoline). The equation for energy efficiency is:

The useful work output can be calculated as the kinetic energy of the car using the equation:

where m is the mass of the car and v is its velocity.

Substituting the given values:

The total energy input is the energy released by burning 0.1 L of gasoline, which is:

Substituting these values into the equation for efficiency:

Therefore, the energy efficiency of the car is approximately 16.7%.

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Answer:

A) wireless communications transmitter

Explanation:

Answer:

Compact fluorescent lightbulb

Explanation:

This is because it has the shortest wavelength

Answer: the answer would be C trust me i took the test if its not that its b

hope that helps

Explanation: i took the test

answer:

a) lower because the sound-wave fronts reach the platform at a frequency lower than the frequency at which they are produced

explanation :3

If the train is leaving the train station, then the people who are standing on the platform would hear a sound with a lower frequency since the train is moving further away. ^^

Answer:

Newton's law of inertia - His first law states that every object remains at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... This is the first part cited in Newton's first law; "there is no net force on the airplane and it travels at a constant velocity in a straight line."

Newton's law of acceleration -  "a net external force changes the velocity of the object. The drag of the aircraft depends on the square of the velocity. So the drag increases with increased velocity."

Newton's law of Action/Reaction - "As a plane flies, the force of the air hitting the plane is always equal and opposite to the force of the plane pushing against the air. The force generated by the engine pushes against air while the air pushes back with an equal and opposite force."

Hope this helps! god bless :)

Please give me brainliest!

Answer:

Calcium is an essential mineral that is important in the diet of many living things as it plays several important roles in the body:

1. Bone and teeth formation: Calcium is a key component of bones and teeth, making them strong and healthy.

2. Muscle function: Calcium plays a critical role in muscle contraction and relaxation, helping muscles function properly.

3. Nerve function: Calcium is involved in the transmission of nerve impulses, which allows for proper communication between nerve cells.

4. Blood clotting: Calcium is required for blood clotting, which is important for preventing excessive bleeding after an injury.

5. Cellular signaling: Calcium is involved in many cellular signaling pathways, helping to regulate various physiological processes in the body.

Therefore, having an adequate amount of calcium in the diet is crucial for the overall health and well-being of many living organisms.

The angular displacement in radians is 15.7 radians.

The angular displacement of the object Δθ = θ - θ₀ where

Now since the object moves 900 degrees in 2 minutes, we convert this displacement to radians, since this is its final position.

So, θ = 900° = 900° × 2π/360°

= 90 × 2π/36

= 15 × 2π/6

= 5 × 2π/2

= 5π rad

Since the object starts from rest, θ₀  = 0 rad

So, the angular displacement, Δθ = θ - θ₀

Substituting the values of the variables into the equation, we have

Δθ = θ - θ₀

Δθ =  5π - 0

Δθ =  5π

Δθ =  5 × 3.14

Δθ =  15.7 radians

So, the angular displacement in radians is 15.7 radians.

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A 0.842g sample of Hydrogen-3 decays to 0.0526g. Approximately 4.206 half-lives have occurred.

To determine the number of half-lives that have occurred, we can use the decay equation and the concept of exponential decay. The decay equation for radioactive decay is given by:

N(t) = N₀ * (1/2)^(t/T),\((1/2)^(^t^/^T^),\)

where N(t) is the remaining amount of the substance at time t, N₀ is the initial amount, t is the time elapsed, and T is the half-life of the substance.

In this case, we have an initial mass of 0.842g (N₀) and a remaining mass of 0.0526g (N(t)). We can set up the equation as follows:

0.0526g = 0.842g \(* (1/2)^(^t^/^1^2^.^3^2)\),

where t represents the number of half-lives that have occurred.

To solve for t, we can take the logarithm of both sides of the equation:

log(0.0526g/0.842g) = log\([(1/2)^(^t^/^1^2^.^3^2^)\)].

Using the logarithmic property log(\(a^b\)) = b*log(a), we can rewrite the equation as:

log(0.0526g/0.842g) = (t/12.32) * log(1/2).

Simplifying further:

log(0.0526g/0.842g) = (t/12.32) * (-log2),

where log2 is the logarithm base 2.

Now, we can solve for t:

t = (12.32 * log(0.0526g/0.842g)) / (-log2).

Using the given values and performing the calculation, we find:

t ≈ 4.206.

Therefore, approximately 4.206 half-lives have occurred.

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When writing a scientific name for an organism, what is included  is Genus, species, with genus capitalized and is denoted as option D.

This is referred to as binomial nomenclature, also called binominal nomenclature or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, or other languages.

In writing a scientific name for an organism,the Genus and species, with genus capitalized are incliuded aand examples incliude Homo sapiens , Rattus rattus etc.

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Answer:

i don'tkniw

Explanation: ido not know

Answer:

800 Watts

Explanation:

Power = Work/time

Working in SI units, Power = Watts, Work = Joules, Time = seconds.

Power = 2240J/2.8s = 800 Watts.

(a) The average acceleration of this sprinter is 3.31 m/s².

(b) The time taken for the sprinter to reach the speed is 3.5 s.

The average acceleration of this sprinter is calculated as follows;

v² = u² + 2as

where;

v² = 0 + 2as

a = v² / 2s

a = ( 11.5² ) / ( 2 x 20 )

a = 3.31 m/s²

The time of motion of the sprinter is calculated as follows;

v = u + at

v = 0 + at

t = v / a

t = ( 11.5 ) / ( 3.31 )

t = 3.5 s

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Answer:

Explanation:fog

Answer:

22.2 m/s

Explanation:

First, we need to convert km to m by multiplying by 1000. This means that the car traveled 320 000 meters.

Next, we convert hours to minutes by multiplying by 3600 (the number of seconds in an hour). This means that overall, the car traveled 320 000 m in 14 400 seconds.

The average speed can be found by using the equation \(\frac{distance}{time}\). After substitution, this gives the fraction \(\frac{320 000}{14 400}\), which reduces to 22 \(\frac{2}{9}\) m/s, or about 22.2 m/s.

The speed of each ball  after the collision  is 1.69 m/s  and direction  is same of the tennis ball's initial motion.

According to the principle of momentum conservation, momentum is only modified by the action of forces as they are outlined by Newton's equations of motion; momentum is never created nor destroyed inside a problem domain.

According to principle of momentum conservation:

the velocity of the two ball  mass after the perfectly inelastic collision is

= (0.060 kg × 2.50 m/s + 0.090 kg × 1.15 m/s) ÷ ( 0.060 kg + 0.090 kg)

= 1.69 m/s

Hence, the speed of each ball is 1.69 m/s.

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(a) The magnitude of the gravitational force on the rock is 64.68 N and on the pebble is 5.488 x 10⁻³ N.

(b) The acceleration of each object is equal to acceleration due to gravity, = 9.8 m/s².

The gravitational force exerted on each object is calculated by applying Newton's law of universal gravitation as follows;

Fg = Gm₁m₂ / R²

where;

The acceleration of each object will be constant and equal to acceleration due to gravity, the force on each object is calculated by using Newton's second law of motion.

Force on the rock;

F = mg

where;

F = 6.6 kg x 9.8 m/s²

F = 64.68 N

The force on the pebble;

F = mg

F = 5.6 x 10⁻⁴  x 9.8

F = 5.488 x 10⁻³ N

Thus, the acceleration of each object is equal to acceleration due to gravity, = 9.8 m/s².

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Answer with explanation:

*Pre-condition: The mass of all blocks are evenly distributed.

As you add more and more blocks, the center of mass of the system changes.

Let the first block be the support. The maximum distance that can be unsupported (hung over) by the second block is equal to half the length of second block.

Why?

Let's take a look at our formula for torque. Torque, \(\tau\), is given by:

\(\tau=rF\sin \theta\), where \(r\) is radius, \(F\) is force, and \(\theta\) is the angle between the radius and level arm.

\(\sin \theta\) is used to calculate the relevant component of a force producing torque. In this case, the only force acting on the object is the force of gravity. Therefore, \(\theta =90^{\circ}\) and recall \(\sin 90^{\circ}=1\).

Conceptually, it's more important to look at the \(r\) term here. From our formula, we can see that if \(r=0\), there is no torque.

The point of pivot will be at the center of mass. Here's the important part:

As long as the point of pivot is supported, \(r\) will remain zero and no torque will be created from the force of gravity. As you keep stacking blocks, as long as the center of mass of the entire system remains supported from your first support, the tower will not fall.

In the given picture shown, that first block will be your support.

The 6 blocks on top of that first block form a center of mass that is still on that first block, thus allowing the tower to remain standing.

Answer:

the answer if im not mistaken is A

Hope this helps:)

Answer:

75m/s

Explanation:

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