Imagine you are dating a mineral sample that contains one-eighth of its original parent isotope. What is the
absolute age of the sample if the half-life of the parent isotope is 15 years?
A. 1.875 years
B. 23 years
C. 45 years
D. 120 years

The individual's weight would be approximately 667.08 Newtons, assuming that the measurement of mass is accurate and the individual is at sea level.

Therefore weight is the force exerted on an object due to gravity. The weight of an object is equal to its mass multiplied by the acceleration due to gravity.

At the surface of the Earth, the acceleration due to gravity is approximately 9.81 meters per second squared. Thus, the weight of an object with a mass of 68 kg would be:

Weight = Mass x Acceleration due to gravity

Weight = 68 kg x 9.81 m/s^2

Weight = 667.08 Newtons

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Answer:

 E_g = m 392 J,      Ek = m 392

Explanation:

Mechanical energy is a very important concept since if the system does not have friction it remains constant

the potential energy of a system is

          E_g = U = m g (y2 - i)

          E_g = m 9.8 (40 -0)

          E_g = m 392 J

The kinetic energy for this system assuming it started from rest

          E_k = K = ½ m v2

how mechanical energy is conserved

         E_g = E_k

         Ek = m 392

Convection differs from radiation in the sense that in radiation, matter is not involved. Option D.

The term heat transfer has to do with the movement of heat from one point another. Recall that heat transfer is one of the things that does occur in nature. There are three kinds of heat transfer that occur in nature and these are;

Let us recall that in the process of convection, there is the movement of heat from one point to the other via the actual movement of the particles of the substance.  On the other hand, radiation occur when heat is transferred without an movement or contact between the objects  between which the heat is transferred. Thus, when air masses are moving, it is a process of convection taking place.

Hence, the difference between conduction and radiation is that matter is involved in convection but not in radiation.

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Spacecraft have observed and measured them. The assertion provides the greatest justification for our certainty that the particles in Neptune's rings are quite tiny. Here option D is the correct answer.

The rings of Neptune are made up of a variety of particles, including dust, pebbles, and boulders. However, we can be sure that the particles in the rings of Neptune are very small because they have been observed and measured by spacecraft.

During the Voyager 2 flyby of Neptune in 1989, the spacecraft captured detailed images of the rings and collected data on the size, composition, and distribution of the particles. The data showed that the particles in the rings of Neptune range in size from tiny dust particles to larger boulder-sized chunks.

In addition to the Voyager 2 data, more recent observations by the Hubble Space Telescope have provided further evidence that the particles in the rings of Neptune are small. Hubble's observations have revealed clumps and arcs in the rings, which suggest that the particles are small and prone to clumping together due to their mutual gravitational attraction.

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Complete question:

Which of the following statements best explains why we can be sure that the particles in the rings of Neptune are very small?

A) They are made of a low-density material

B) They do not produce significant gravitational effects

C) They are composed of ice and rock fragments

D) They have been observed and measured by spacecraft

Answer:

1100 kg

Explanation:

500 lb x 2.20lb (1kg) =1100kg

Answer:

No

Explanation:

Your answer will be no because Mars has less gravity then Earth does but you would still have the same amount of mass therefor If someone goes to Mars and goes back to Earth they would not weigh the same as they did on earth.Hope it helps you!

a) The flow rate will be Q = 84 cm³ per second.

b) The flow speed in the capillaries will be 0.028 cm /s.

The flow rate is defined as the volume of the fluid passing across the cross-section of the pipe in a unit of time.

To calculate the flow rate of blood in the aorta, we can use the equation:

Flow rate = Area x Velocity x Density

Where the area is the cross-sectional area of the aorta, the velocity is the flow speed of the blood in the aorta, and the density is the density of blood (p = 1.0 g/cm³).

Substituting the values we know, we get:

Flow rate = 2.0 cm²x 42 cm/s x 1.0 g/cm³

Flow rate = 84 g/s

Therefore, the flow rate of blood in the aorta is 84 grams per second.

b. According to the principle of continuity, the flow rate of blood must remain constant as it moves from the aorta to the capillaries. Therefore, we can use the equation:

Flow rate = Area x Velocity x Density

To calculate the flow speed in the capillaries, given the combined cross-sectional area of the capillaries.

We know that the flow rate in the capillaries must be the same as the flow rate in the aorta, which we calculated in part a:

Flow rate = 84 g/s

The combined cross-sectional area of the capillaries is given as 3.0 x 10³ cm². Substituting these values in the equation, we get:

84 g/s = 3.0 x 10³cm² x Velocity x 1.0 g/cm³

Solving for the velocity, we get:

Velocity = 84 g/s / (3.0 x 10³ cm² x 1.0 g/cm³)

Velocity = 0.028 cm/s

Therefore, the flow speed in the capillaries is 0.028 cm/s.

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The average velocity is 1 km/hr.

Velocity is the speed of a body in a given direction.

Velocity can also defined as the displacement of body with time.

The average velocity will be be the ratio of the total displacement with time.

Taking the right direction as positive and the direction to the left as negative:

displacement of the body = (4.0 - 2.5) km

displacement of the body = 1.5 km

Average velocity = 1.5 km/ 1/5 hours

Average velocity = 1 km/hr

In conclusion, the average velocity is obtained from the displacement and time taken.

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Answer:

Thorium 227 (also known as Radioactinium)

This is because the energy of the light is related to the frequency of the light, not the brightness.

Frequency is a measure of how often something happens over a given period of time. It is typically expressed as a number of occurrences per unit of time, such as cycles per second, hertz (Hz), or events per second. Frequency is an important concept in physics and engineering, as it is used to describe waves, signals, and vibrations. Frequency is also important for communication, as it indicates how often a signal is sent or received.

The higher the frequency, the more energy it has. Red light has a lower frequency than blue light, so even though the red light is brighter, it does not have as much energy as the dim blue light. This is why the red light has no effect on ejecting electrons from the photosensitive surface; the energy of the red light is not enough to overcome the binding energy of the electrons to the surface.

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Given :

Our weight is 600 Newton on the earth.

To Find :

How far should you go from the center of the earth so that it will be 300 Newton​.

Solution :

Acceleration due to gravity at depth d is given by :

\(g' = g( 1 - \dfrac{d}{R_e})\)

At earth surface, mg = 600 N   ...1)

At depth d, mg' = 300 N            ...2)

Dividing 1) and 2), we get :

\(\dfrac{g}{g'} = \dfrac{600}{300}\\\\\dfrac{g}{g'} = 2\\\\g = 2g'\\\\g = 2\times g\times ( 1 - \dfrac{d}{R_e} )\\\\1 - \dfrac{d}{R_e} = \dfrac{1}{2} \\\\d = \dfrac{R_e}{2}\)

Therefore, we should go in the depth of distance half the radius of earth.

Answer:

Explanation:

Answer:

1. Ability of problem solving.

2. Physics gives u a job.

3. Physicists can become engineers.

4. Physics puts your math to use.

5. Physics is versatile.

6. Physics makes things possible.

Answer:

Explanation:

speed = distance / time

          = 15 meters / 3 seconds

          = 5 meter / sec.

Answer:5/sec

Explanation:

According to the question the speed of the skater's hands is 528 m/min.

To calculate the speed of the skater's hands, we can use the formula:

Speed = Circumference * Revolutions per minute

Given that the skater's hands are 140 cm apart and she spins at 120 rpm, we need to calculate the circumference of the circle formed by her hands.

The circumference of a circle is given by the formula:

Circumference = 2 * π * radius.

In this case, the radius is half the distance between the skater's hands, which is 140 cm / 2 = 70 cm.

Converting the radius to meters, we have 70 cm = 0.7 m.

Now we can calculate the circumference:

Circumference = 2 * π * 0.7 m = 4.4 m (rounded to one decimal place).

Finally, we can calculate the speed of the skater's hands:

Speed = Circumference * Revolutions per minute

     = 4.4 m * 120 rpm

     = 528 m/min.

Therefore, the speed of the skater's hands is 528 m/min.

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Multimeter conducts like a big resistor. Since current will be very low due to the very high resistance, the circuit's overall current won't be impacted in the slightest. It will transmit the appropriate voltage

A passive electrical device known as a resistor adds resistance to the flow of electric current. They can be discovered in virtually all electrical networks and electronic circuits. One ampere of current (A) and a one volt (V) drop across a resistor's terminals produce an ohm, which is the resistance that results. The voltage at the terminal ends determines the current in a direct proportion. Ohm's law demonstrates how to calculate this ratio. Multiple applications exist for resistors. Among some examples are voltage division, heat generation, matching and loading circuits, current limiters for electric current, gain control, and time constant setting. With resistance values spanning a range of more than nine orders of magnitude, they are readily available on the market. Units of resister is omhs.In the International System of Units, the ohms serves as the reference unit for electrical resistance.

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Answer:

Fnet = 200 -150

=50N

towards left

Answer:

light bends away from the normal when it moves from air into water-refraction

Answer: C.) Light slows down when it moves from air into water.

Explanation: i hope this helps :)

"For every action, there's an equivalent and opposite reaction" sums up Newton's third law of motion. This means that if the astronaut pushes an object, the object will push back at the astronaut with an equal level of force.

Every time one object applies force to another, the other object applies an equal and opposing force to the first.

Examples of aerodynamics-related action and reaction:

"For every action, there's an equivalent and opposite reaction" sums up Newton's third law of motion.

Thus, this means that if the astronaut pushes an object, the object will push back at the astronaut with an equal level of force.

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The power output of  2.00 kg object is accelerated uniformly from rest to 3.00 m/s while moving 1.5 m across a level frictionless surface is 24.09 watts.

In science, power is the time required to do work or provide energy, expressed as work done W or energy transferred divided by the time interval t - or W/t. A fixed amount of work can be done for a long time with a low-powered engine, or for a short time with a high-powered engine. The unit of power is work (or energy) per unit of time. Such as foot pounds per minute, joules (or watts) per second, and ergs per second. Force can also be expressed as the product of the force required to move an object and the object's velocity in the direction of the force. If the magnitude of the force F is measured in pounds and the velocity ν is measured in feet per minute, then the power is equal to Fν foot pounds per minute.

Given,

Mass of object (m) = 2.00 kg

Distance covered (s) = 1.5 m

Velocity of object (v) = 3.00 m/s

For calculation of acceleration:

v² = u² + 2as

3² = 0 + 2 × a × 1.5

9 = 3a

a = 2 m/s²

For calculation of time:

s = ut + ¹/₂at²

1.5 = 0 × t + ¹/₂ × 2 × t²

1.5 = t²

t = 1.22 sec.

For calculation of gravitational force:

F = mg

F = 2 × 9.8

F = 19.6 N

For calculation of work done:

W = F × s

W = 19.6 × 1.5

W = 29.4 J

For calculation of power output:

P = W/t

P = 29.4/1.22

P = 24.09 watts

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The tension is in each rope will be 230.535 N .

Tension also known as tensile force is the force developed in a rope, string, or cable when it is stretched by an applied force.

Mass of the gymnast = m = 47 kg

Acceleration due to gravity = g = 9.81 \(m/s^{2}\)

T = m*g

T = 47 * 9.81

T = 461.07 N

Since there are two parallel ropes attached to the ceiling, therefore tension will be equally divided into each rope respectively.

Tension in each rope = t

t = \(\frac{T}{2}\)

t = \(\frac{461.07}{2}\)

t = 230.535 N

The tension in each rope will be 230.535 N, when both the ropes are attached to the ceiling directly above the gymnast.

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(a) Yes, our velocity changes because the direction is changing. (b) No, we do not accelerate.

(a) Velocity is a vector quantity that includes both magnitude (speed) and direction. When we round a curve and drive east, the direction of our motion changes.

Therefore, even if our speed remains constant, the velocity vector changes because it now points in the eastward direction instead of the previous direction.

(b) When the magnitude of the direction of the velocity is changed, we say that acceleration has occurred. In this scenario, although the direction of your velocity changes, your speed remains constant.

Since the rate at which velocity changes determines acceleration, there cannot be acceleration without a change in velocity.

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the answer is 11.1 units

Explanation:

because i donot know go study with teacher not with app ya fool this is so esay even my 5 class bro solved it

The trials where the velocity of the tennis ball is to be determined should be option c. 1 and 4.

It is the quantity of the vector that defined the rate where an object is to be changed the position. Here the person could be imagined and then moved in a rapid way like one step forward and one step back.

So here it should be rolled to the left hand side and it can be stopped after it rolled towards the right hand side.

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Answer:

Hi there!

Using Hooke's Law:

F = kx

F = Force (N)

k = Spring constant (N/m)

x = displacement (m)

Begin by converting cm to m:

280 cm = 2.8 m

Now, plug in the givens:

25 = 2.8k

k = 8.93 N/m

Answer: 8.75 km/hr

Explanation:

Concept to know

Average speed: total distance/total time

-------------------------------------------------------

 total distance/total time

=(12.2+19.3)/(1.4+2.2) ⇔ add the numbers of two time running together

=31.5/3.6 ⇔ simplify

=8.75 km/hr

Hope this helps!! :)

Please let me know if you have any question

Answer:

Power is 4373.25 W

Explanation:

We have,

The lift raises a car of mass 850 kg to a height of 2.1 m. It uses a force of 8330 N and takes 4 seconds to raise the car. It is required to find the power of the lift. Power is equal to the rate at which the work is done. So,

\(P=\dfrac{Fd}{t}\\\\P=\dfrac{8330\times 2.1}{4}\\\\P=4373.25\ W\)

So, the power of the lift is 4373.25 W.

(a) The fraction of neutron's kinetic energy transferred to the atomic nucleus is 0.09.

(b) The final kinetic energy of the neutron is 3.82 x 10⁻¹³ J.

The final velocity of the atom is calculated by applying the principle of conservation of linear momentum as follows;

initial momentum of the neutron = final momentum of the atom

m₁u₁  = m₂u₂

where;

The mass of the atomic nucleus = 11.1 m₁

u₂  = m₁u₁ / m₂

u₂  = m₁u₁ / (11.1 m₁)

u₂  = 0.09u₁

The initial kinetic energy of the neutron is calculated as;

K.Ei = ¹/₂m₁u₁²

The final kinetic energy of the atomic nucleus is calculated as;

K.Ef =  ¹/₂m₂u₂²

K.Ef =  ¹/₂(11.1 m₁)(0.09u₁)²

K.Ef = 0.09 (¹/₂m₁u₁²)

K.Ef = 0.09 (K.Ei)

The fraction of neutron's kinetic energy transferred to the atomic nucleus is calculated as;

= 0.09 (K.Ei) / K.Ei

= 0.09

= 9 %

The final kinetic energy of the neutron is calculated as follows;

K.E.f (neutron) = (1 - 0.09) x (4.2 x 10⁻¹³ J)

K.E.f (neutron) = 3.82 x 10⁻¹³ J

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Answer:

Python is a programming language uses code like java ,Css and HTML. it is uses in software and some application. It is use in coding website and application.

Explanation:

Ohm's law gives the relationship between current, voltage, and resistance. Its mathematical form is given by :

V = IR

I is current and R is resistance

Resistance resists the flow of electric current in a circuit. When the amount of applied voltage is increased, it will not change the resistance. It increases the current. Hence, the correct option is (C).