The radium isotope 223Ra, an alpha emitter, has a half-life of 11. 43 days. You happen to have a 1. 0 g cube of 223Ra, so you decide to use it to boil water for tea. You fill a well-insulated container with 460 mL of water at 16∘ and drop in the cube of radium.


How long will it take the water to boil?


Express your answer with the appropriate units

Answer:

g = 1.25m/s²

Explanation:

Given the following data;

Mass = 5kg

Height = 6m

Gravitational potential energy = 24J

To find the acceleration due to gravity;

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

\( P.E = mgh\)

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

GPE = mgh

Substituting into the equation, we have;

24 = 5*6*g

24 = 30g

g = 30/24

g = 1.25m/s²

Therefore, the acceleration due to gravity on Planet X is 1.25m/s².

Answer:

g=0.8m/s^2

Explanation:

M=5kg

h=6m

GPE=24J

GPE=Mgh

g=GPE/Mh

g=24J/(5kg)(6m)=0.8

g=0.8m/s^2

Explanation:

show me the paper so that way i can answer your question

Answer: the answer is 4

Explanation:

The frequency of the wave is 0.33 Hz.


To find the frequency of the wave, we need to use the formula f = 1/T, where f is the frequency and T is the period. The period is the time it takes for one complete wave cycle to pass a point.  

In this case, we are given that 10 crests move past a point in 30 seconds. Since one complete wave cycle includes two crests, we know that 5 complete wave cycles pass in 30 seconds.  

To find the period, we can divide the total time by the number of cycles: T = 30 seconds / 5 cycles = 6 seconds/cycle.

Now we can use the formula for frequency: f = 1/T = 1/6 seconds/cycle = 0.1667 cycles/second. Simplifying this to Hz (1 Hz = 1 cycle/second), we get:  

f = 0.1667 Hz  

Rounding to two decimal places, the frequency of the wave is 0.33 Hz.

Learn more about wave here:

https://brainly.com/question/25954805

#SPJ11

The cloud needs to spin more quickly to keep its angular momentum (if the distance of the mass from the center of the cloud decreases, the rate of spin must increase to compensate).

Stars and planets are created when enormous cosmic gas and dust clouds clash. These clouds revolve in the general gravitation of the galaxy, and the contents of the clouds as well as the clouds themselves are in constant motion.

This movement will most likely result in a small rotation of the cloud as seen from a place near its center. This rotation can be described in terms of its invariant measure of motion, angular momentum.

Because of the conservation of angular momentum, ice skaters spin more quickly when they draw their arms in. As her arms approach her axis of rotation, she rotates faster while retaining the same angular momentum.

To know more about angular momentum, visit:

https://brainly.com/question/4126751

#SPJ4

The carbon cycle and the water cycle are different in terms of the substances they involve and the processes they encompass.

The carbon cycle involves the movement of carbon atoms between the atmosphere, living organisms, and the Earth's crust through processes such as photosynthesis, respiration, and fossil fuel combustion. On the other hand, the water cycle, also known as the hydrological cycle, involves the continuous movement of water through evaporation, condensation, precipitation, and runoff, without any change in the composition of water molecules.

While both cycles are essential for maintaining Earth's systems, they differ in terms of the substances involved and the specific processes that occur. The carbon cycle focuses on the cycling of carbon atoms, influencing global climate and long-term carbon storage, whereas the water cycle revolves around the movement of water, ensuring the availability of freshwater resources and sustaining life on the planet. Understanding these cycles helps us comprehend the interconnectedness of natural processes and their impact on the environment.

To know more about carbon cycle and the water cycle click here:

https://brainly.com/question/9243222

#SPJ11

Answer:

increase

Explanation:

Answer:

The goal of a throwing movement will generally be distance, accuracy or some combination of the two. In throws for distance, the release speed - and, therefore, the force applied to the thrown object - is crucial.

Answer:

Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.

Explanation:

I'm not sure if that's correct, but I hope it's help

The width of the slit is approximately 6000 × \(10^{(-8)\) meters, calculated using the formula for the position of the first diffracted minimum in a single-slit diffraction experiment.

To find the width of the slit, we can use the formula for the position of the first diffracted minimum in a single-slit diffraction experiment:

d sin(θ) = mλ

where:

d is the width of the slit,

θ is the angle of diffraction,

m is the order of the minimum,

λ is the wavelength of light.

Given:

λ = 6000 × \(10^{(-8)\) cm,

The first diffracted minimum appears at a distance of 1 mm (√(1 mm)) from the central maximum, which corresponds to an angle of diffraction of θ.

To convert the distance to an angle, we can use the small-angle approximation:

θ ≈ tan(θ) = (√(1 mm)) / 100 cm

Substituting the values into the formula, we have:

d sin(θ) = mλ

d sin(√(1 mm) / 100 cm) = λ

Since we are dealing with the first minimum (m = 1), we can simplify the equation to:

d sin(√(1 mm) / 100 cm) = λ

Solving for d, we get:

d = λ / sin(√(1 mm) / 100 cm)

Substituting the given values, we have:

d = (6000 × \(10^{(-8)\) cm) / sin(√(1 mm) / 100 cm)

Calculating sin(√(1 mm) / 100 cm):

sin(√(1 mm) / 100 cm) ≈ 0.0100

Substituting this value into the equation:

d ≈ (6000 × \(10^{(-8)\) cm) / 0.0100

Calculating the expression:

d ≈ 6000 × \(10^{(-6)\) cm

Converting to meters:

d ≈ 6000 × \(10^{(-8)\) m

Therefore, the width of the slit is approximately 6000 × \(10^{(-8)\) meters.

Learn more about single-slit diffraction experiments at

https://brainly.com/question/32079937

#SPJ4

The equivalent resistance between points A and B in the diagram is 22 Ω

We shall begin by obtaining the equivalent resistance in parallel (i,e the three 6 Ω resistor). Details below:

1/Rₜ = 1/R₁ + 1/R₂ + 1/R₃

1/Rₜ = 1/6 + 1/6 + 1/6

1/Rₜ = 3/6

1/Rₜ = 1/2

Rₜ = 2 Ω

Finally, we shall determine the equivalent resistance between A and B (i.e series arrangement). Details below:

R = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ + R₇ + R₈ + R₉ + R₁₀ + R₁₁

R = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2

R = 22Ω

Thus, we can conclude that the equivalent resistance is 22 Ω

Learn more about resistance:

https://brainly.com/question/13691672

#SPJ1

Answer:

When the parcel rises, its volume expands as it strives to maintain equilibrium with the lower pressure outside the air mass and pushes into the surrounding atmosphere. In this way, some of the thermal energy added to the air is used for expansion rather than warming.

Answer:

2ms-2

Explanation:

F = ma

a = F/m

= 0.5 / 0.25

= 2ms-2

Answer 2m/s^2

Explanation:

mass=0.25kg

Force =0.5N

Acceleration=force/ mass

Acceleration=0.5/0.25

Acceleration=2

Acceleration =2m/s^2

Answer:

There is no particular relationship between the height and shoe size. But the shoe sizes in males is usually bigger than females. And the shoe size tends to get bigger when the person is taller.

Explanation:

The potential energy is directly proportional to the distance between the charged particles, reducing the distance by a factor of 3 increases the potential energy by a factor of 3 squared, which is increased by a factor of 9. (option C)

The electric potential energy between two charged particles is given by the equation:

PE = k * (q1 * q2) / r

where PE is the electric potential energy, k is the Coulomb's constant, q1 and q2 are the charges of the particles, and r is the distance between them.

If the distance between the particles is reduced by a factor of 3, it means that the new distance (r') is one-third of the original distance (r).

To determine how the electric potential energy changes, we can compare the original potential energy (PE) with the new potential energy (PE').

PE' = k * (q1 * q2) / r'

Substituting r' = (1/3) * r into the equation:

PE' = k * (q1 * q2) / [(1/3) * r]

Simplifying the equation:

PE' = 3 * k * (q1 * q2) / r

Comparing PE' with the original potential energy PE:

PE' = 3 * PE

Therefore, the new potential energy (PE') is increased by a factor of 3 compared to the original potential energy (PE).

However, the question asks for the change in potential energy when the distance is reduced by a factor of 3. The factor of 3 refers to the change in distance, not the change in potential energy.

Since the potential energy is directly proportional to the distance between the charged particles, reducing the distance by a factor of 3 increases the potential energy by a factor of 3 squared, which is 9.

Hence, the correct answer is C. It is increased by a factor of 9.

For more such questions on potential energy, click on:

https://brainly.com/question/1242059

#SPJ8

Answer:

2 m and 6.25 m for a and b respectively

Explanation:

Acceleration (a) = (2-0)/2 = 1 ms^-2 for first 2s

Distance = u*t + 0.5 *a*t^2

= 0 * 2 + 0.5 * 1 * 2^2

= 2 m

btn 2 and 4s

Acceleration a = (2.5-2)/2 = 0.25 ms^-2

Distance = u*t + 0.5 *a*t^2

=2*2+0.5 *0.25*2^2

= 4.5 m

btn 4 and 5s

Acceleration a = (1-2.5)/1 = -1.5 ms^-2

Distance = u*t + 0.5 *a*t^2

= 2.5*1 + 0.5 * -1.5*1^2

= 1.75 m

Total distance Btn 2 and 5s = 4.5 + 1.75 m

= 6.25 m

Answer:Newton’s First Law Scenarios

Taking off from an Aircraft Carrier

The airplane accelerates from 0 to 200 mph in 1.5 seconds.  Why are rear-facing passengers' feet tied down?  What do their eyes feel like?

Because of the speed of the aircraft and how fast its moving  

Car Accident—Car versus Tree

What happens to the driver's body when his car hits the tree at a high speed?

Your body will get slammed forward and into the airbag  

Car Accident:  Rear-end collision

What will happen to the stationary driver who is rear-ended?  What device protects him?

His head will be forced forward that's why they have a airbag and headrests  

Football: Helmet-to-Helmet Collision

What happens to the players' brains inside their skulls?

It rattles and thats whats creates a concussion

Roller Coaster Ride

Why does your stomach feel so funny when you go down the big hill?

Because your stomach rises because of the sudden dip  

Why do you feel like you will fly out of your seat at the top of a hill when you are going fast?

Because the car has more down force  

Teacups at Disneyland

Why do the riders feel squished together if the teacups spin too fast?

Because they are pushed to the outside  

Explanation:Newton’s First Law Scenarios

Taking off from an Aircraft Carrier

The airplane accelerates from 0 to 200 mph in 1.5 seconds.  Why are rear-facing passengers' feet tied down?  What do their eyes feel like?

Because of the speed of the aircraft and how fast its moving  

Car Accident—Car versus Tree

What happens to the driver's body when his car hits the tree at a high speed?

Your body will get slammed forward and into the airbag  

Car Accident:  Rear-end collision

What will happen to the stationary driver who is rear-ended?  What device protects him?

His head will be forced forward that's why they have a airbag and headrests  

Football: Helmet-to-Helmet Collision

What happens to the players' brains inside their skulls?

It rattles and thats whats creates a concussion

Roller Coaster Ride

Why does your stomach feel so funny when you go down the big hill?

Because your stomach rises because of the sudden dip  

Why do you feel like you will fly out of your seat at the top of a hill when you are going fast?

Because the car has more down force  

Teacups at Disneyland

Why do the riders feel squished together if the teacups spin too fast?

Because they are pushed to the outside  

Answer:

mass = 3950 kg

speed= 25m/ sec

time= 10.5 sec

force

\( \fbox{f = m.a}\)

To find the force we need to find the Acceleration first.

accleration= change in Velocity/time

accleration= 25/10.5

accleration= 2.38 m/sec²

put the value of accleration in the formula of force

force = Mass . accleration

force = 3950 x 2.38

Answer:

i would want to be a dog or a cat

Explanation:

there just funny

For the display in the children's science museum, we want to demonstrate the physics of a solid sphere rolling down a hill and around a loop-the-loop. The sphere has a radius of 0.123 m and starts at rest at the top of the hill. As it rolls down the track, it gains kinetic energy and rotational energy. However, in order to make it around the loop without falling, the sphere needs to have a minimum speed of 16 m/s at the top of the loop.

To create the display, we can use a model of the hill and loop made out of foam or other materials. We can then place the solid sphere at the top of the hill and give it a gentle push to start it rolling down the track. As it gains speed, it will start to rotate and pick up rotational energy as well. Once the sphere reaches the loop, it needs to have enough kinetic energy to make it around the loop without falling. This means it needs to be moving at a minimum speed of 16 m/s at the top of the loop. We can use a sensor or other measurement device to determine the speed of the sphere as it approaches the loop, and adjust the starting position or initial push as needed to ensure it reaches the minimum speed. Overall, this display will be a great way to teach children about the concepts of kinetic and rotational energy, as well as the physics of rolling and looping objects.

Learn more about rotational energy here:

https://brainly.com/question/19305456

#SPJ11

The magnitude of the average emf induced in the entire coil depends on the area of the coil, number of turns, magnetic field changing through coil.

An electromagnetic coil is an electrical conductor in the shape of a coil (spiral or helix), such as a wire. Electromagnetic coils are used in electrical engineering to interact with magnetic fields in devices such as electric motors, generators, inductors, electromagnets, transformers, and sensor coils. Either an electric current is delivered through the coil's wire to produce a magnetic field, or an external time-varying magnetic field generated via the inside of the coil causes an EMF (voltage) in the conductor.

The emf in the coil is given by,

emf = NdФ/dt = NA dB/dt

where N is number of turns, A is area of cross section, B is magnetic field

changing in the coil.

To know more about Coil :

https://brainly.com/question/27961451

#SPJ1

Answer:

Mechanical force

Explanation:

Answer:

Increase the number of coils.

Explanation:

By increasing the number of coils we can increase the electromagnet.

By the Vertical motion model, the ball is in the air for 2.525 seconds.

We have, A juggler tossing a ball into the air. The ball leaves the juggler's hand 4 feet above the ground and has an initial velocity of 40 feet per sec. The juggler catches the ball when it falls back to a height of 3 feet.

We can determine it by finding the time taken by the ball to travel from a height of 4 feet to 3 feet.

Vertical motion model: 

h = h₀ + vt - 16t²

Where h₀ = initial height of the ball (in feet)

v = initial velocity of the ball (in feet per second)

t = time taken by the ball to travel from initial height to final height (in seconds)

h = height of the ball (in feet)

Now, the initial height of the ball (h₀) is 4 feet.

The final height of the ball (h) is 3 feet.

The initial velocity of the ball (v) is 40 feet per second.

Using the vertical motion model, we have,

3 = 4 + 40t - 16t²

16t² - 40t - 1 = 0

This is a quadratic equation in the standard form,

ax² + bx + c = 0

Where, a = 16 b = -40 c = -1

Using the quadratic formula, we get,

t = [ - b ± √(b² - 4ac)] / 2a

Putting the values in the formula, we get,

t = [ - ( - 40 ) ± √( ( - 40 )² - 4(16)( - 1) ) ] / 2(16)

t = [ 40 ± √( 1600 + 64 ) ] / 32

t = [ 40 ± sqrt( 1664 ) ] / 32

t = [ 40 ± 40.8 ] / 32

We will take the positive value, as time can not be negative.

t = [ 40 + 40.8 ] / 32

t = 2.525 seconds

Therefore, the ball was in the air for 2.525 seconds.

To know more about the "Vertical motion model": https://brainly.com/question/27526920

#SPJ11

Answer:

a = 6.27 m/s² - acceleration

Explanation:

Given:

F = 9 079 N

m = 1 447 kg

_________

a - ?

Acceleration:

a = F / m

a = 9 079 / 1 447 ≈ 6.27 m/s²

The electric potential difference in the loop of wire is the greatest when the magnetic field passing through the loop is changing the most rapidly.

This happens when the magnet is passing through the loop the fastest, which means that the rate of change of the magnetic field is the highest at that point.

This rate of change induces an electric field in the loop, which in turn generates an electric potential difference. The strength of the electric potential difference is directly proportional to the rate of change of the magnetic field.

Therefore, when the magnet is moving quickly through the loop, the electric potential difference is the greatest.

However, once the magnet has passed completely through the loop, the magnetic field is no longer changing, so the electric potential difference drops to zero.

To Learn more about magnet Click this!

brainly.com/question/26315406

#SPJ11

As the box is moving with a constant velocity, the two forces acting on the box are canceling each other.

Then   friction force = 80 Newtons              but in the opposite direction.

Friction force =  Mu  * Normal force exerted by ground  =  Mu * weight of box

So we find Mu.

Mu = coefficient of friction between box and horizontal surface

          = Force of friction / weight  =  80 / 50 * 9.81 = 0.163

When an identical box is placed on top, the force of friction is

      = Mu * total weight = 0.163 * (50+50) * 9.81 = 159.9 Newtons

Answer:

7,79 seconds

Explanation:

\({\displaystyle {\overline {a}}={\frac {\Delta v}{t}}}\)

You need to use the acceleration formula. A is acceliration, \(\displaystyle \Delta \mathbf {v}\) is change in velocity and t is time.

You  need to multiply the formula with t and divide by a and you get

a*t=\(\displaystyle \Delta \mathbf {v}\)

t= \(\displaystyle \Delta \mathbf {v}\)/a

after that you just need to insert the numbers

change in velocity is 76.4 minus 0.

acceliration is gravitational acceleration which is 9.81.

After that you get

t=76.4/9.81

t= 7,787971458 s

Answer:

seconds of freefall and calculate the velocity at impact in mi/hr. I VE = 10.78 m/s ... You are walking in Paris alongside the Eiffel Tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy ... If you neglect air resistance, calculate how many seconds the croissant dropped before it.

Explanation:

Purchasing uses information from the  sales order plan to place purchase orders for raw materials with qualified suppliers.

The term purchasing has to do with the process of the buying of goods and services. The process of purchasing a very essential part of the business venture such that in some areas, an entire department may be devoted to the coordination of the processes involved in purchasing in the establishment.

A purchasing manager may be given the task of seeing to the coordination of the entirety of all the purchasing activities.

Thus, we could see that purchasing is a chain of activities that is based on the principles of demand and supply.

Learn more about purchasing:https://brainly.com/question/24112214

#SPJ1

Answer:

Force applied

Explanation:

An object will remain at its state of rest unless a non zero for act on it