Two metal disks are welded together and are mounted on a frictionless axis through their common centers. One disk has a radius R1 = 2.60 cm and mass M1 = 0.810 kg and the other disk has a radius R2 = 5.00 cm and mass M2 = 1.58 kg . (Figure 1) A string of negligible mass is wrapped around the smaller disk, and a 1.50-kg block, is suspended from the free end of the string. The block is released from rest a distance of 2.10 m above the ground. What is the block's speed just before it hits the ground?

A. the moving charge induces a magnet field

B. the energy of the charge pushes on the compass

C. the electrons heat up the wire, causing the compass to deflect

Answer:

A. Piccolo

B. The flute would usually have the highest pitch, but because the piccolo is half the size of a flute, it's higher pitched. The piccolo in C has a range from D5 – C8 which is pretty high pitched. This means that the piccolo's range is an octave above that of the flute.

C. The human ear naturally picks out higher notes, so when piccolos play extremely high, we can hear them more easily than the other instruments in a band or orchestra.

D. I'm sorry but I don't know this one.

Answer:

the resistance of the copper wire 20 meters long and with a diameter of 0.05 cm is 0.342 ohms.

Explanation:

To calculate the resistance of the copper wire, we need to use the formula:

R = (ρ * L) / A

where R is the resistance of the wire, ρ is the resistivity of copper, L is the length of the wire, and A is the cross-sectional area of the wire.

The resistivity of copper is 1.68 × 10^-8 Ω·m.

First, we need to calculate the cross-sectional area of the wire:

A = π * (d/2)^2

A = π * (0.05cm/2)^2

A = 0.0019635 cm^2

Note that we converted the diameter from centimeters to meters, since the resistivity is given in ohms per meter.

Now, we can calculate the resistance of the wire:

R = (ρ * L) / A

R = (1.68 × 10^-8 Ω·m * 20m) / 0.0019635 cm^2

R = 0.342 Ω

Therefore, the resistance of the copper wire 20 meters long and with a diameter of 0.05 cm is 0.342 ohms.

The resistance of the gold wire cannot be determined with the information given. The resistance of a wire depends on several factors, including its length, cross-sectional area, and resistivity.

While we know the resistance of the aluminum wire, we do not know any of these other factors for the gold wire. Additionally, the resistivity of gold is different from that of aluminum, so even if we did know all the other factors, we could not simply use the same resistance value for the gold wire.

Therefore, to determine the resistance of the gold wire, we would need more information, such as its length and cross-sectional area.

To know more about resistivity visit :

https://brainly.com/question/29427458

#SPJ

Dark matter interacts only with the force of gravity and does not interact with any of the other three fundamental forces.

The four fundamental forces of nature are gravity, electromagnetism, the strong nuclear force, and the weak nuclear force. Dark matter is a form of matter that does not interact with light or any other form of electromagnetic radiation, which means that it does not interact with electromagnetism. Dark matter also does not interact with the strong nuclear force or the weak nuclear force, which are responsible for binding atomic nuclei together and mediating nuclear reactions.

The only force with which dark matter is known to interact is gravity. This is because dark matter has mass, and any object with mass exerts a gravitational force on other objects with mass. The gravitational force of dark matter is thought to be responsible for the observed gravitational lensing effect, in which the path of light is bent by the gravitational pull of massive objects.

To learn more about Dark matter click here : brainly.com/question/24197345

#SPJ11

The mass of the cylinder increased by a factor of 3, the  gravitational potential energy increases by a factor of 3.

The given parameters:

The gravitational potential energy of an object is calculated as follows;

P.E = mgh

where;

m is the mass

g is acceleration due to gravity

h is the height of the cylinder

when the mass = 1 kg

P.E = 1 x g x h

P.E = gh

when the mass = 3 kg

P.E = 3 x gh

P.E = 3gh

Thus, when the mass of the cylinder increased by a factor of 3, the  gravitational potential energy increases by a factor of 3.

Learn more about gravitational potential energy here: https://brainly.com/question/19768887

The spring constant of that particular spring is 1.916N/cm. The spring constant k of the fishing scale can be calculated using Hooke's Law, which states that the force (F) of a spring is directly proportional to the extension (x) of the spring.

We can thus write an equation as F = kx, where k is the spring constant. Using the given information, we can solve for the spring constant k as follows:

Find the Force Increase: 28N is the initial force measured on the spring. An increase of 14.6cm in the length of the spring will result in an additional force, F.

Calculate the spring constant: The relationship between the additional force and the additional length is given by the equation: F = k(Delta x), where k is the spring constant. So, k = F/ Delta x = 28N / 14.6cm = 1.916N/cm.

Therefore, the spring constant of that particular spring is 1.916N/cm.

To know more about Hooke's Law, click here:

https://brainly.com/question/30379950

#SPJ4

The speed of the saw is 5710 rpm.

#SPJ4

Answer:

150000000000

Explanation:

speed= distance/time

Answer:

10s

Explanation:

Answer:

the car’s final displacement is 60 m

Explanation:

Given;

initail velocity of the car, u = 0

acceleration of the car, a = 0.8 m/s²

time of motion, t = 10 s

The first displacement of the car:

\(x_1 = ut + \frac{1}{2} at^2\\\\x_1 = 0 + \frac{1}{2} (0.8)(10)^2\\\\x_1 = 40 \ m\)

The second displacement of the car;

acceleration, a = 0.4 m/s²,   time of motion, t = 10 s

\(x_2 = ut + \frac{1}{2} at^2\\\\x_2 = 0 + \frac{1}{2} (0.4)(10)^2\\\\x_2 = 20 \ m\)

The final displacement of the car;

x = x₁  +  x₂

x = 40 m  +  20 m

x = 60 m

Therefore, the car’s final displacement is 60 m

Air circulation patterns and ocean currents distribute heat and moisture unevenly over the Earth, which causes variation (differences) in the Earth's climate.

The Earth is the third planet from the Sun in our solar system and is the only known celestial body to support life. It has a diverse range of ecosystems, including land, water, and the atmosphere, which interact to create a complex and interconnected system. The Earth is characterized by its unique features, such as its atmosphere composed primarily of nitrogen and oxygen, its dynamic geology with tectonic plate movements and volcanic activity, and its abundant water in the form of oceans, lakes, and rivers. The Earth has a roughly spherical shape and is divided into several layers, including the solid inner core, the liquid outer core, the mantle, and the crust. It experiences various natural phenomena, such as day and night caused by its rotation on its axis, and the changing seasons due to its tilt and orbit around the Sun. The Earth provides a habitat for a wide range of organisms, including humans, plants, animals, and microorganisms. It sustains life through its complex ecosystems, which involve interactions between living organisms and their environment. The Earth's climate is influenced by factors such as solar radiation, atmospheric composition, oceanic currents, and topography, leading to a diverse range of climates and weather patterns across the globe.

As the home to human civilization, the Earth provides resources and sustenance for human societies. It is a planet of great beauty and diversity, with stunning landscapes, biodiversity, and natural wonders. Understanding and preserving the Earth's ecosystems and maintaining its delicate balance is crucial for the well-being and survival of all life forms on the planet.

Learn more about the Earth here:;

https://brainly.com/question/22368421

#SPJ11

At the planet's centre, a satellite won't experience any torque. The spacecraft is moving at a speed of 8000 metres per second.

Weight refers to the gravitational pull of the earth on an object. Additionally, it is equal to the ratio of the object's mass to its gravitational acceleration.

Satellites circle their planets in elliptical patterns. The elliptical orbit lengthens if a satellite's speed is suddenly increased. A satellite's course is a parabola or a hyperbola if it has enough velocity to leave and never come back to the planet.

Learn more about satellite here:

brainly.com/question/29267553

#SPJ4

Hence,option D . The rod is made up of plastic, the positive charge from the cloth to the rod.

Static charge or an electrostatic charge is a deficiency or extra of electrons that occurs on ungrounded or insulating surfaces. it's miles produced by way of triboelectric costs, expenses which can be generated by friction among surfaces, including the motion of paper thru a copier or printer.

An electrical charge is created when two materials come into contact or are rubbed collectively. when the substances are in touch, electrons can be actually rubbed off of one object and onto the alternative.

Static power is an imbalance of electric fees within or on the floor of a material. The fee stays till it could pass away by way of an electric present-day or electric-powered discharge.

Learn more about electric charge here:-https://brainly.com/question/2373424

#SPJ1

The statement "heat rises" is not accurate in explaining the temperature decrease with altitude.

The main reason why it is colder at higher altitudes is because of the decrease in air pressure with increasing altitude. As air rises in the atmosphere, the pressure decreases, and this decrease in pressure is accompanied by a decrease in temperature. It is known as adiabatic cooling.

When air molecules rise to higher altitudes, they expand due to the lower atmospheric pressure. As the air expands, it does work against the surrounding air molecules, leading to a decrease in its internal energy and, consequently, a drop in temperature. This adiabatic cooling causes the temperature to decrease with increasing altitude.

In summary, the decrease in temperature with higher altitudes is primarily due to adiabatic cooling resulting from the expansion of air as it rises and experiences lower atmospheric pressure.

To learn more about adiabatic cooling visit: https://brainly.com/question/28625802

#SPJ11

The test statistic (Z-score) is approximately 4.95.

To calculate the test statistic (Z-score) for this hypothesis test, we can use the formula:

Z = (sample mean - hypothesized population mean) / (standard deviation / sqrt(sample size))

Sample mean (X-bar) = 37

Hypothesized population mean (μ) = 30

Standard deviation (σ) = 8

Sample size (n) = 50

Substituting these values into the formula, we get:

Z = (37 - 30) / (8 / sqrt(50))

Z = 7 / (8 / 7.071)

Z = 7 / 1.414

Z = 4.95 (rounded to two decimal places)

A statistical hypothesis test is a technique for determining if the available data are sufficient to support a certain hypothesis. We can make probabilistic claims regarding population parameters using hypothesis testing.

To know more about hypothesis test

https://brainly.com/question/17099835

#SPJ11

The velocity of the earthworm when it crawled 35 millimeter over a time of 2.5 seconds is 0.014 m/s.

Velocity can be defined as the ratio of displacement to time of a body.

To calculate the earthworm's velocity, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the earthworm's velocity is 0.014 m/s.

Learn more about velocity here: https://brainly.com/question/24445340

#SPJ1

Resistance is any external force that acts against movement.

RESISTANCE:

Learn more about resistance at: https://brainly.com/question/14023824?referrer=searchResults

Answer:

c

Explanation:

The resistance of the person is 9200 Ω if a fault in the switch is caused by a householder to receive a mild electric shock with the mean power transfer to the person as 5.75 W and potential difference across the person as 230 V.

The resistance of the person can be calculated using Ohm’s law.

Ohm’s law states that the potential difference across a conductor is directly proportional to the current flowing through it, provided that its temperature and other physical conditions remain constant.

It can be expressed as: V = IR,

where V is the potential difference, I is the current, and R is the resistance of the conductor.

Rearranging the equation, we get: R = V/ I.

Given that the mean power transfer to the person was 5.75 W and the potential difference across the person was 230 V, the current flowing through the person can be calculated using the formula:

P = IV

where P is the power ,V is the potential difference and I is the current flowing through the person

Rearranging the equation, we get: I = P/V

Substituting the given values, we get:

I = 5.75/230 = 0.025 A

Therefore, the resistance of the person can be calculated as:

R = V/I = 230/0.025 = 9200 Ω

Hence, the resistance of the person is 9200 Ω.

For more such questions on resistance  visit:

https://brainly.com/question/28135236

#SPJ8

Answer:

Lead

Explanation:

To figure out if the given metal is silver, lead, or aluminum, we have to calculate its specific heat capacity, which is the heat energy required to raise the temperature of one kilogram of the respective substance by one degree Celsius (or one Kelvin).

To do that, we can use the following formula:

\(\boxed{C = \frac{Q}{m \cdot \Delta T}}\),

where:

• C ⇒ specific heat capacity (J kg⁻¹ K⁻¹)

• Q ⇒ heat energy (J)

• m ⇒ mass of object (kg)

• ΔT ⇒ change in temperature (K)

Using the given information and the formula above, we can calculate the specific heat capacity of the given metal:

\(\mathrm {C = \frac{3250 \ J}{1.32 \ kg \times (292 - 273) \ K }}\)

   = 129. 6 J kg⁻¹ K⁻¹

Therefore, the metal is lead, because the specific heat capacity of lead is around 130 J kg⁻¹ K⁻¹, which is very close to the answer we got.

Explanation:

The options are; Ice Steam and Water.

The state of matter associated with the options are;

Ice - Solid

Steam - Gas

Water- Liquid

The particles are arranged in a regular pattern in ____________________

Among all the state of matter, the particles are closely packed and in an ordered manner is observed in the solid state - Ice

The particles are close together but not in a pattern in ____________________

In the liquid state of matter, the particles are not as tightly bounded as that of the solid. Hence they are able to still move around a bit.  - Water

The particles move quickly in all directions in ____________________

The particles of the gaseous state move in all directions colliding with each other and the walls of the container. - Steam

Answer:

F = K Qa Qb / R^2

The forces are equal - the same on each sphere

Suppose the force was repulsive, for simplicity, obviously a string holding them together would have the same tension in both directions

Answer:

Explanation:

where is the question

Answer:

0.25m/s

Explanation:

m1v1 =m2 v2. law of conservation the of momentum. since they smash together to form a big drop M2 =2m1

m1*0.50m/s=2m1*v2

V2= m1*0.50m/s÷2m1

V2= 0.25m/s

Answer:

c 0.10

Explanation:

V=IR

12.0V=I x 120.12ohms

I=0.099

I= 0.10

The horizontal distance travelled by the football is 3.1 m.

The angle of projection of the football is calculated as follows;

tan ( θ ) = Vy / Vx

where;

tan ( θ ) = 5 / 3

tan ( θ ) = 1.667

θ = arc tan (1.667)

θ = 59⁰

The resultant velocity of the ball is calculated as follows;

v = √ (Vx² + Vy²)

v = √ (3² + 5²)

v = 5.83 m/s

The horizontal distance travelled by the football is calculated as follows;

x = v² sin(2θ) /g

where;

x = [ (5.83)² sin(2 x 59) /9.8 ]

x = 3.1 m

Learn more about horizontal distance here: https://brainly.com/question/24784992

#SPJ1

Answer:

its very simple this list the items that you have in your house that have electric energy

Explanation:

Answer:

Zero I think I'm not sure

The pendulum has the greatest speed as it passes through the lowest position, straight down, where it was hanging limply before you started it swinging.

To calculate the frequency of the sound heard by the person, we need to consider the Doppler effect, which describes the change in frequency due to the relative motion between the source of the sound and the observer.

The formula for the observed frequency due to the Doppler effect is given by:

f_observed = f_source * (v_sound + v_observer) / (v_sound + v_source)

where:

f_observed is the observed frequency,

f_source is the source frequency,

v_sound is the speed of sound in air, and

v_observer and v_source are the velocities of the observer and the source, respectively.

Given:

Source frequency (f_source) = 1.44 × 10^3 Hz

Speed of sound in air (v_sound) = 343 m/s

Velocity of the siren (v_source) = 15 m/s

Velocity of the observer (v_observer) = 0 m/s (since the observer is at rest)

(a) Frequency of the sound directly from the siren:

For this scenario, the observer and the siren are moving away from each other. Substituting the given values into the Doppler effect formula:

f_observed = 1.44 × 10^3 * (343 + 0) / (343 + 15)

(b) Frequency of the sound reflected from the cliff:

In this case, the sound waves are reflected by the cliff, resulting in a change in direction. The relative motion between the observer and the reflected sound is the sum of their individual velocities. Thus, we consider the observer's velocity as -15 m/s (since it's moving towards the observer).

f_observed = 1.44 × 10^3 * (343 + 0) / (343 - 15)

By performing the calculations, we can determine the frequencies of the sound heard by the person directly from the siren and reflected from the cliff.

Learn more about frequencies using given link :

brainly.com/question/4290297

#SPJ11