which variable would be most useful in determining the number of people eligible for retirement benefits in a certain year?

Answer:

X-rays

Explanation:

Answer:(C) is your answer

Explanation: when you swing something back and forth it will eveuntally stopbecause it needs some type of external enegy source or basiclly a push.

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The pendulum bob swings back and forth, but eventually, it stops because there cannot be continued motion without an external energy source. The correct option is C).

The pendulum is a body that is suspended from a fixed point and moves back and forth as a result of gravity. Pendulums are employed to control clock movement because the period—the amount of time between each full oscillation—is constant.

Something that is being swung back and forth eventually comes to a stop because it requires an external energy source, or more simply, a push.

A pendulum is a straightforward illustration of energy transfer since it repeatedly transforms potential energy into kinetic energy until it comes to rest due to the minimal amount of energy lost to heat and air resistance.

Therefore, the correct option is C) There cannot be continued motion without an external energy source.

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Answer:

an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.

Explanation:

Look it up on google

Answer:

A satellite is an artificial body put in orbit around the earth or another planet in order to collect information or for communication.

A satellite could also be a celestial body orbiting the Earth or another planet.

Answer: gravity

Explanation:

The force of gravity causes comets to regularly return to the inner solar system after being gone for many years. The gravitational pull of sun is involved in the process.

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Answer:

I think jupiter is a gas giant

Explanation:

Jupiter, a gas giant in the outer planets, is not a terrestrial planet. Because of their solid, rocky surfaces, Mercury, Venus, Earth, and Mars are terrestrial planets.

Third option is correct.

Terrene planets are those that are closer to the sun and have solid, stony surfaces on their surfaces. They are primarily made up of rocks that are composed of silicates and metals. Mercury, Venus, Earth, and Mars are the four planets that make up our solar system that are classified as terrestrial.

On the other hand, Jupiter is a gas giant and is classified as one of the outer planets, which are also referred to as the Jovian planets. It is almost entirely made up of hydrogen and helium, and it does not have a surface that is solid. Jupiter is not like any of the planets that are found in our solar system because of its enormous size and mass.

Jupiter's Great Red Spot, a massive storm that has raged for aeons, is a famous feature. It has many moons and a complicated ring system. Jupiter resembles Saturn, Uranus, and Neptune due to its large size and gaseous composition. Terrestrial planets are tiny and made of stone.

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A option is the right option

Answer: The sum of all the acceleration vectors. Hope this helps. :)

Explanation:

The Work [tex]W[/tex] done by a Force [tex]F[/tex] refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path.  

It should be noted that it is a scalar magnitude, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter:  

[tex]1J=(1N)(1m)=Nm[/tex]  

Now, when the applied force is constant and the direction of the force and the direction of the movement are parallel, the equation to calculate it is:  

[tex]W=(F)(d)[/tex] (1)

When they are not parallel, both directions form an angle, let's call it [tex]\alpha[/tex]. In that case the expression to calculate the Work is:  

[tex]W=Fdcos{\alpha}[/tex] (2)

For example, in order to push the 200 N box across the floor, you have to apply a force along the distance [tex]d[/tex] to overcome the resistance of the weight of the box (its 200 N).  

In this case both (the force and the distance in the path) are parallel, so the work [tex]W[/tex] performed is the product of the force exerted to push the box [tex]F=50N[/tex] by the distance traveled [tex]d[/tex]. as shown in equation (1).

Hence:

[tex]W=(50N)(20m)[/tex]  

[tex]W=1000Nm=1000J[/tex] >>>>This is the work  

Answer:

30 kgm/s

Explanation:

The momentum of a body is given by the product of mass and  its velocity.

∴ momentum = mv

                        = 15 × 2

                        = 30 kgm/s

Answer:

D. hydrogen sulfide gas (H2S)

Explanation:

A compound is composed of two or more elements chemically bound together.

In this case, hydrogen is chemically bounded with sulfur to form a gaseous compound called hydrogen sulfide.

Answer:

D. hydrogen sulfide gas (H2S)

Explanation:

A compound is composed of two or more elements chemically bound together.

In this case, hydrogen is chemically bounded with sulfur to form a gaseous compound called hydrogen sulfide.

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Explanation:

600 meters / second squared

To calculate the acceleration of the projectile that goes from 0 to 300 m/s in 0.5 seconds, we can use the formula for acceleration (a) which is the change in velocity (Δv) divided by the time (Δt) it takes for that change:

a = Δv / Δt
Here, Δv = final velocity - initial velocity
         Δv = 300 m/s - 0 m/s = 300 m/s, and
         Δt = 0.5 seconds.

So, the acceleration of the projectile would be:
a = 300 m/s / 0.5 s = 600 m/s2

Thus, the projectile is accelerated at a rate of 600 meters per second squared.

Usually just the lower-case Greek letter alpha.

I'll type it here, and hope Brainly can handle it:

Small Greek Alpha ==> α

α is the  symbol represents an alpha particle in nuclear equations

Nuclear equations represent the reactants and products in radioactive decay, nuclear fission, or nuclear fusion.

Alpha particle in nuclear equation

42 He 24He or 42α

so the symbol of alpha particle in nuclear equations is

α

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The answer is Your mouth or nose

Answer ======= the mouth/nose.

Answer:

12200 ft/s

Explanation:

The question is on constant acceleration

→Uniform acceleration motion is given by⇒⇒⇒     Vf=Vo+ at..............(a)

→Where Vf= final velocity=?

            Vo=initial velocity =2200 ft/s

              a= acceleration= 1000ft/s²

               t= 10.0 sec

Substitute values in (a) above

Vf=Vo+ at

Vf= 2200 + ( 1000×10) = 12200 ft/s

Answer:

12,200

Explanation:

got it right on odessyware

Vibration is a periodic motion that an object makes about an equilibrium position. Objects such as a pendulum or a plucked guitar string demonstrate this. Systems vibrate at their natural frequency, which can be seen when they undergo free or forced vibration.

Vibration can be best described as a type of periodic motion where an object moves to and fro about an equilibrium position. This is prominent in many systems, such as a plucked guitar string or a pendulum swinging. The time to complete one cycle of motion, or one oscillation, is known as the period.

Systems often have a specific frequency at which they naturally oscillate, known as their natural frequency. This natural frequency can be noticed when a system is undergoing free vibration, force vibration, or forced vibrations with damping. An example of this natural frequency can be witnessed in a vibrating string or a pendulum.

Furthermore, much like how waves have fundamentals and overtones, vibrating systems also exhibit these properties. For example, resonances in atoms due to the wave-like nature of their electrons, or the vibrating strings, all show wave characteristics, underlining the applicability of the concept of vibration over a wide range of physical systems.

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Answer: The direction of the magnetic field of a large magnet is toward you. ... Q: 650 kg cart is moving along a roller coaster track at 3.50 m/s at ... Q: Lab 8- Magnetic Fields: solenoids, forces on charged particles and ..... Q: Problem 7 A uniform magnetic field of magnitude 0.173 T is directed along the positive x axis.

Explanation:

The magnitude and direction of the force on the charge will be 30 N towards the +x direction.

Lorentz's force is defined as the force acting on a point charge when it is moving in an electric and magnetic field. Under the electric and magnetic field, a force is to act on the charge, known as the Lorentz force.

The given data in the problem is ;

q is the value of charge =  +0.300 c

B is the magnetic field strength = 0.400 T.

v is the velocity of moving charge = 250 m/s.

Mathematically, the Lorentz force is given by;

[tex]\rm F=qvB \\\\ F= 0.300 \times 250 \times 0.400 \\\\ F= 30 \ N[/tex]

Hence, the magnitude and direction of the force on the charge will be 30 N towards the +x direction.

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Answer: 94%

Explanation: If the work put into a lever is 930 joules and the work accomplished is 870 joules, the efficiency of the lever is 94%.

870/930=93.5

And rounded you get 94.

If the work put into a lever is 930 joules and the work accomplished is 870 joules, the efficiency of the lever is 94%.

Explanation:

The work put into the lever, input power of the lever = 930 joules

Work accomplished, output power of the lever = 870 joules.

Efficiency = output power / input power in terms of percentage.

Efficiency = 870 / 930 = 0.935.

Efficiency in terms of percentage = 0.935 * 100 = 94%

Therefore, efficiency of the lever = 94%.

Answer:

the answer will be C.  4 degrees C

Explanation:

you subtract base meters from peak meters to get 4 meters; then Multiply 6.5 by 4.

Then subtract that total from 30 degrees C

***as altitude increases, temperature decreases***

To find the temperature at the peak 7,000 meters high when starting from 3,000 meters, multiply the altitude change (4 km) by the lapse rate (6.5 degrees C) to get a temperature decrease of 26 degrees C. Subtract that from the starting temperature (30 degrees C) to get 4 degrees C as the temperature at the peak.

To calculate the air temperature at the peak of a mountain when you ascend from 3,000 meters to 7,000 meters, use the standard lapse rate. The lapse rate is the rate of temperature decrease with altitude, typically around 6.5 degrees C for every 1,000 meters. Since you are ascending 4,000 meters (7,000 - 3,000 meters), multiply the lapse rate by the number of kilometers:

Lapse Rate: 6.5 degrees C/km
Altitude Change: 4 km (4,000 meters / 1,000 meters per km)

Multiply the lapse rate by the altitude change:
6.5 degrees C/km * 4 km = 26 degrees C

Now, subtract this number from the starting temperature at 3,000 meters:

Starting Temperature: 30 degrees C
Temperature Decrease: 26 degrees C
30 degrees C - 26 degrees C = 4 degrees C

Therefore, the air temperature at the peak, 7,000 meters, would be 4 degrees C.

Answer:

The correct answer is 0,2 rems

Explanation:

People are exposed to natural sources of radiation all the time. According to recent estimates, the average person in the United States receives an effective dose of approximately 3 mSv per year of natural radiation, which is equivalent to 0.3 rems. This amount includes cosmic radiation from outer space and is average because it varies depending on the region people are in.

The amount of radiation for a chest x-ray of an adult (0.01 rems) is approximately equal to 10 days of natural radiation to which we are all exposed every day.

Have a nice day!

Answer: 0.2 rems

Explanation:

Answer:

the answer is A.  they are essential to life on Earth

Explanation:

Answer: the answer is a

Explanation:

because that is how we live

Answer:

100 degree Celsius

373 Kelvin

212 Fahrenheit

Explanation:

The boiling point of water on celsius scale is 100 degree C.

Convert 100 degree C into kelvin

C = K - 273

100 degree C = 100 + 273 = 373 K

Convert 100 degree C into degree F

C = 5 / 9 ( F - 32)

F = 9 / 5 x 100 + 32 = 212

Water boils at 373  

✔ kelvins

.

Water boils at 100  

✔ degrees Celsius

.

Water boils at 212  

✔ degrees Fahrenheit

.

Conduction

Transfer of heat through soil by the movement of molecules Touching; direct contact

Convection

Warm air in atmosphere rises and is replaced by cooler air

Flow of heat energy through liquids and gases

Warm air circulates toward cooler polar regions.

Radiation

Electromagnetic waves transfer energy through space to Earth

Heat energy on Earth escapes into space

All

Heat energy transferred

Moves from warmer to cooler

Convection & Radiation

Responsible for weather patterns on Earth

Final answer:

Heat from the Sun to the Earth is transferred through space by radiation.

Explanation:

Heat from the Sun to the Earth is transferred through space by radiation. The space between Earth and the Sun is largely empty, so there is no possibility of heat transfer by convection or conduction. The Sun emits electromagnetic waves that are absorbed by the Earth, transferring heat energy.

Radiation is the only possibility for heat to reach Earth because of the distance between the Earth and the Sun. Since the Earth is far away from the Sun, Sun cannot conduct heat to the Earth and the only option is radiation.

All the other options are wrong as per the explaination above.

Answer:

Many tree seedlings crowd the open space and attempt to grow in the sunlight.

Answer:

A

Explanation:

Many tree seedlings crowd the open space and attempt to grown in the sunlight.

In longitudinal waves, the vibration or oscillation is parallel to the propagation direction of the wave itself . These disturbances are due to the successive compressions of the medium, where the particles move back and forth in the same direction as the wave.

This means, the closer together the particles are, the greater the amplitude of the wave. This is because of the distance between particles of the medium that is being compresed by the perturbation.

In this sense, the best example is the motion of a spring, since the air particles that are around the spring coil will oscillate in the same direction in which the waves propagate.

Answer: The motion of spring

Explanation: because the motion of spring represents a longitudinal wave

Answer:

A medium with a frequency of 3 Hz and a wavelength of 5 m

Explanation:

The velocity of a wave can be found by using the formula:

[tex]v=f\lambda[/tex]

where

f is the frequency

[tex]\lambda[/tex] is the wavelength

Let's apply this formula to calculate the velocity of each wave:

A medium with a frequency of 4 Hz and a wavelength of 3.5 m:

[tex]v=(4 Hz)(3.5 m)=14 m/s[/tex]

A medium with a frequency of 3 Hz and a wavelength of 5 m :

[tex]v=(3 Hz)(5 m)=15 m/s[/tex]

A medium with a frequency of 4 Hz and a wavelength of 3 m :

[tex]v=(4 Hz)(3 m)=12 m/s[/tex]

A medium with a frequency of 5 Hz and a wavelength of 2 m:

[tex]v=(5 Hz)(2 m)=10 m/s[/tex]

So, we see that the wave with the greatest velocity is the 2nd one.

Answer:

In longitudinal waves, particles travel in the direction parallel to that of the wave motion where as in transverse waves, particles move perpendicular to the direction of the wave motion and in surface waves, particles in the medium move in a circular motion.A good example of longitudinal waves is sound waves. Vibrating a string on the ground can serve as an example of transverse wave.For surface waves, the ocean waves travelling on the surface can illustrate the cicular movement of particles in the water.

Answer:

There are three kinds of mechanical waves depending upon the direction in which they travel or propagate through the medium.

(i) Longitudinal waves

(ii) Transverse waves

(iii) Surface waves

In transverse waves, the particles tend to move in a direction at right angles to the waves whereas in longitudinal waves, they move in parallel direction to each other. When it comes to surface waves they lie in circular motion.

Answer:

B. They cannot make light rays converge.

Explanation:

Real images are defined as the image in which light rays will converge at a point after reflection through the mirror

if the light rays converge and meet at a point in front of mirror then the point of convergence is known as real image

while if the light rays will not converge and the light will diverge after reflection through the mirror then it will appear to meet at a point behind the mirror

this imaginary point is known virtual image

so here in case of plane mirror and convex mirror the light rays will not converge at a point after reflection through the mirror

so it can not form real images

so correct answer will be

B. They cannot make light rays converge.

Answer:

B. 0.16 m

Explanation:

The vertical distance by which the player will miss the target is equal to the vertical distance covered by the dart during its motion.

Since the dart is thrown horizontally, the initial vertical velocity is zero:

[tex]v_y = 0[/tex]

While the horizontal velocity is

[tex]v_x = 15 m/s[/tex]

The horizontal distance covered is

[tex]d_x = 2.7 m[/tex]

Since the dart moves by uniform motion along the horizontal direction, the time it takes for covering this distance is

[tex]t=\frac{d_x}{v_x}=\frac{2.7 m}{15 m/s}=0.18 s[/tex]

along the vertical direction, the motion is a uniformly accelerated motion with constant downward acceleration g=9.8 m/s^2, so the vertical distance covered is given by

[tex]d_y = \frac{1}{2}gt^2=\frac{1}{2}(9.8 m/s^)(0.18 s)^2=0.16 m[/tex]

Answer:

0.16 m

Explanation:

Answer:

The total resistance is 15 Ω, the total current is 1A, The potential drop in R1 and R2 are 10V and 5V respectively and the total power develped is 15 W.

Explanation:

First it is necessary to simplify the circuit. We can do this by calculating the total or equivalent resistance Re. For series resistance arrangement, Re is computed as:

RT = R1 + R2 = 5 Ω + 10 Ω = 15 Ω

According to Ohm’s law the total current can be calculated dividing the total voltage V by Re:

I = V/Re = 15V/15Ω = 1A  

This current will be the same current through R1 and R2. Then we can compute the potential drop across R2 multiplying the current across R1 by the resistance:

VR1 = I*R2 = 1 A * 10 Ω = 10 V  

The potential drop across R2 is obtained in the same way as R1, considering R2 resistance:

VR2 = I*R1 = 1 A * 5Ω = 5 V

The total power could be calculated multiplying the total current I by the total voltage:

P = I*V = 1 A * 15 V = 15 W

Calculations related to the flow of current, potential drop, power and total resistance in a circuit can be determined through the application of Ohm's Law and Power formulas. Specific values are needed for exact calculations.

In order to calculate the current, potential drop, total power developed, and total resistance in a circuit, we first need to understand some basic physics concepts. The current passing through a resistor, like R1 or R2, can be calculated using Ohm's Law, which states: Current (I) = voltage (V) / resistance (R). Similarly, the potential drop across a resistor can also be determined using Ohm's law: Potential Drop = Current * Resistance. Lastly, total power developed in a circuit can be determined using the formula: Power (P) = Voltage * Current, and total resistance can be obtained using the appropriate formula based on whether the resistors are connected in series or in parallel. Without specific values provided for voltage, resistance, or current, exact calculations cannot be done here.

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Answer:

3.0000 atm = 303.98 kPq

7.000 mmHg = 0.9333 kPa

10.00 kPa = 0.09869 atm

15.00 kPa = 112.5 mmHg

Explanation:

Just did this on edge, all these answers are correct!

Answer:

0.7 Cm

Hope this helps you out!

Answer:

677.9 million cm is mars diameter in CM hope this helps