2. How much current is in a circuit that includes a 1.5-volt battery and a
bulb with a resistance of 2 ohms?

Answer:

Aluminium

Explanation:

If we calculate the heat transfer for all the substances, we have

Mc(∆T)

Where M is mass

C is heat capacity

∆T is temperature change.

For iron

Mc(∆T) = 500 ×0.440×100= 22000J

For copper

Mc(∆T) = 500 ×0.385×100= 19250J

For aluminium

Mc(∆T) = 500 ×0.897×100= 44850J

Aluminium has the highest heat capacity and would take longest for this heat capacity to be dissipated under similar condition.

Answer:

Key Takeaways: Metallic Character​​ These properties include metallic luster, formation of cations, high electrical and thermal conductivity, and ...

Explanation:

The atoms with the strongest metallic properties on the periodic table are found in upper left corner of periodic table. The correct option is A.

The upper left corner of the periodic table is typically where one can find the atoms with the strongest metallic properties. Alkali metals and alkaline earth metals which are renowned for their high electrical conductivity, luster and malleability are found in this region. These elements are easy to lose and easily form positive ions because they have few valence electrons in their outermost energy levels.

Due to growing atomic size and declining electronegativity, metallic properties tend to become more noticeable as you move down and to the left in this region. On the other hand nonmetals and metalloids with stronger nonmetallic properties such as high electronegativity and poor electrical conductivity make up the lower right region.

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Distance covered = (speed) x (time)

Time = (Distance covered) / (speed)

Time = (48 km) / (32 km/hr)

Time = (48/32) hr

Time = 1.5 hrs (1 hour 30 minutes)

The distance from the source to the reflector is approximately 171.5 meters when a sound wave leaves its source and is traveling through the air.

To determine the distance from the source to the reflector, we can use the speed of sound in air.

The speed of sound in air is approximately 343 meters per second at room temperature and normal atmospheric conditions.

Since the reflected wave returns 0.5 seconds later, it means that the sound wave traveled twice the distance from the source to the reflector.

Using the formula: Distance = Speed × Time, we can calculate the distance.

Distance = Speed of sound × Time

Distance = 343 m/s × 0.5 s

Distance = 171.5 meters

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For  the​ body's position at time t  is mathematically given as

s(t)=4.9t^2+5t+16

Generally, the equation for the velocity is mathematically given as

v=ds/dt

v=9.8t+5 as velocity

s=4.9t^2+5t+c

s(0)=16

16=c

s(t)=4.9t^2+5t+16

In conclusion the​ body's position at time t

s(t)=4.9t^2+5t+16

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The body position at the given time t is s = 4.9t² + 5t + 16 if the velocity v= ds/dt and the initial position of a body moving along a coordinate line.

A numerical representation of the distance between two items or locations is called distance. A physical length or an approximation based on other considerations in physics or common usage can be referred to as distance.

We have:

\(\rm v = \frac{ds}{dt}\)

\(\rm v = 9.8t+5\)  is the velocity

\(\rm s = 4.9t^2+5t+c\) is the speed

At t = 0 s(0) = 16

16 = c

\(\rm s = 4.9t^2+5t+16\)

Thus, the body position at the given time t is s = 4.9t² + 5t + 16 if the velocity v= ds/dt and the initial position of a body moving along a coordinate line.

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The point where the electric potential is zero is 65 cm from the 13.0 nC charge and 6 cm from the -1.2 nC charge. There is only one point at which the electric potential is zero on the x-axis.

To determine the point at which the electric potential is zero, we should use the formula for electric potential due to a point charge given by;`V=kq/r` Where`V`is the electric potential, `k`is Coulomb’s constant`

= 9 × \(10^9 Nm^2/C^2\)

`q`is the magnitude of the charge in Coulombs, `r`is the distance between the charges in meters.The total electric potential due to both charges is the sum of the electric potential due to the 13.0 nC charge and the electric potential due to the -1.2 nC charge.`

V = V1 + V2``V

= kq1/r1 + kq2/r2``

At the point where the electric potential is zero,`V1 = -V2``kq1/r1

= kq2/r2``r2/r1

= -q1/q2``r2

= -6*13/-1.2

= 65cm

Therefore, the point where the electric potential is zero is 65 cm from the 13.0 nC charge and 6 cm from the -1.2 nC charge. There is only one point at which the electric potential is zero on the x-axis.

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The mass of the ball remains constant, the impulse for a single trial would be the same even if the ball bounced back to its original height, since the impulse is zero.

Impulse is defined as the product of force and time, and it is represented as

I = FΔt,

where

I is the impulse,

F is the force,

Δt is the change in time.

Impulse also equals the change in momentum. Therefore, impulse can be calculated by using the following equation:

I = m * (Vf - Vi),

where

I is the impulse,

m is the mass of the object,

Vf is the final velocity,

Vi is the initial velocity.

Therefore, the impulse for a single trial would be the same if the ball bounced back to its original height (had a perfectly elastic collision with the floor).

As we know, Impulse is the change in momentum of an object, and the momentum is the product of mass and velocity. Mathematically,

Impulse = change in momentum

I = m * Δv

The product of the mass of an object and the change in its velocity is defined as the Impulse. This means that the impulse will be equal to the change in the velocity of the object multiplied by its mass.

The formula for the impulse in the case of an object colliding with a surface can be written as:

I = Ft

where,

Impulse (I) is equal to the force (F) applied on the object multiplied by the time period (t) for which the force is applied.

Now, let's discuss the second part of your question,If the ball bounced back to its original height, which means it has a perfectly elastic collision with the floor. So, we know that the perfectly elastic collision is the collision in which the two objects collide and bounce off each other with no loss of kinetic energy. In this case, the ball will rebound back with the same velocity as before, and the momentum will change, but its value will be the same.

Now we can use the impulse-momentum theorem and the conservation of energy to solve this problem:

According to the impulse-momentum theorem, the impulse experienced by the ball is equal to the change in momentum of the ball.

Therefore, we can write:

Impulse = Change in Momentum

I = m * (Vf - Vi)

Since the ball bounces back to its original height, the final velocity (Vf) is equal to the initial velocity (Vi). This means that the change in velocity (Δv) is equal to zero. Therefore, the impulse is also equal to zero. Since the mass of the ball remains constant, the impulse for a single trial would be the same even if the ball bounced back to its original height.

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Answer:

natural is the answer

Friction is a natural force which exist

To find the values of the  distance if the image is from the mirror,

Height of object, h = 3 cm

Distance of object from mirror, u = -18 cm (negative sign indicates that the object is placed on the left side of the mirror)

Focal length of mirror, f = -12 cm (negative sign indicates that the mirror is concave)

We can use the mirror formula to find the distance of the image from the mirror:

1/f = 1/u + 1/v

where v is the distance of the image from the mirror.

Substituting the values of u and f, we get:

1/-12 = 1/-18 + 1/v

Simplifying the equation, we get:

v = -36 cm (negative sign indicates that the image is formed on the left side of the mirror)

Therefore, the distance of the image from the mirror is 36 cm.

To find the height of the image, we can use the magnification formula:

m = -v/u

where m is the magnification of the image.

Substituting the values of v and u, we get:

m = -(-36)/(-18) = 2

Since the magnification is positive, the image is upright and enlarged.

The height of the image can be found using the formula:

h' = m * h

where h' is the height of the image and h is the height of the object.

Substituting the values of m and h, we get:

h' = 2 * 3 = 6 cm

Therefore, the height of the image is 6 cm.

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Answer:

Yes

Explanation:

The wind net force acting on the sail is doing work.   (The 'net' force takes into account the force of friction between the boat hull and the water)

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

option D is the correct answer.

Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is calculated as follows;

1,000 ---------- 0 time

500 ----------- 10.4 hours

125 ------------- 20.8 hours

Thus, from the calculation done above, we can see that If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

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The statement that describes what happens in the graph is option (B).

The lander's velocity decreases toward the reference.

Velocity time graph is a type of graph that describes the change in velocity with respect to time of motion of an object.

Below is the basic explanation of the behavior of the average velocity of the particle with time.

Thus, we can conclude that between 20 and 25 seconds in the velocity tike graph, the average velocity of the object decreased towards the reference point (reference velocity = - 40 m/s.).

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a) The force constant is 2.49 N/m

b) The amplitude is 1.65 m

We know that a spring can be said to be the kind of substance that has a potential energy that has been stored in it and this energy is released to do work when the spring has been pulled.

We have that;

T = 2π√m/K

T = period

m = mass

K = spring constant

Then;

0.84 = 2*3.14√0.447/K

0.84/2*3.14 = √0.447/K

(0.84/2*3.14)^2 = 0.447/K

K  = 0.447/0.0179

K = 2.49 N/m

Then the amplitude is obtained from;

W = 1/2 KA^2

A =√2W/K

A = √2 * 3.4/2.49

A = 1.65 m

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The change in velocity of the baseball is 39.72 m/s

This is the difference between the final and the initial velocity of a body.

To calculate the change in velocity of the ball, we use the formula below.

Where:

Make Δv the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The change in velocity of the baseball is 39.72 m/s

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An exoplanet with a mass 10 times that of Jupiter would have a size (radius) roughly 1.5 times larger than Jupiter.

The size of a planet depends on its mass and composition. For planets with a mass greater than Jupiter, their size is mainly determined by how much they compress under their own gravity. An exoplanet with a mass 10 times that of Jupiter would have a higher gravity, which would cause it to compress more than Jupiter, resulting in a larger size.

However, the exact size of such a planet would depend on its composition. If it had a similar composition to Jupiter, then its radius would be roughly 1.5 times larger than Jupiter. But if it had a different composition, such as a higher percentage of heavier elements, then its radius could be slightly larger or smaller than that.

Overall, the size of an exoplanet with a mass 10 times that of Jupiter would not be significantly larger or smaller than Jupiter, but rather in between the two sizes.

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The angular acceleration of the pulley is 15170.4 rad/ s².

What is mass ?

The amount of matter in a body is referred to as its mass. The kilograms is the kilograms, which is the SI unit of mass (kg). Mass is defined as: Mass = Density/Volume.

What is acceleration?

Acceleration was the representation rate In a change of velocity because the acceleration always depends on the object's speed. Acceleration determines the rate of the particles. Acceleration is the vector quantity. It is a vector quantity, but it has both extent and movement. Newton's law also has the acceleration of the magnitude described. The m.s-2 is the standard unit for acceleration.

As per the given data

mass = 0.15 kg

radius = 0.075 m

torque= 6.4 m⋅N

∴∝=T/ I= T/ 1/2mr²

6.4/ 1/2×0.15×0.075 × 0.075 rad/ s²

= 15170.4 rad/ s²

Therefore, the angular acceleration of the pulley is 15170.4 rad/ s².

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The statement "the volume of 1 mole of any gas at STP is 22.4 L" is true because the volume of 1 mole of any gas at STP is 22.4 L. This is known as the molar volume of a gas. STP stands for Standard Temperature and Pressure, which is defined as 273.15 K (0°C) and 1 atm.

The statement is true. According to the ideal gas law, at Standard Temperature and Pressure (STP), which is defined as 0 degrees Celsius (273.15 Kelvin) and 1 atmosphere (101.3 kilopascals or 760 mmHg) of pressure, one mole of any gas occupies a volume of 22.4 liters. This relationship is known as the molar volume of a gas at STP.

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Explanation:

The acceleration of the scooter is 2.5 m/s

False. The rule does not necessarily involve holding a compass in your right-hand.

The right-hand rule is a general principle used in physics and engineering to determine the direction of various vectors.

There are different variations of the right-hand rule, but the basic idea is to use your right hand to orient your fingers or thumb in a particular direction to determine the direction of a magnetic field, force, or other vector quantity.

Thus, the rule does not necessarily involve holding a compass in your right hand.

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Determine if the following statement is true or false. The right-hand rule states that you should always hold a compass in your right hand.

The correct option to the question is Matter.

Matter makes up everything. matter can be solid, liquid, or gas. matter is made up of atoms, or tiny particles that are the smallest unit of matter.

Moreover, Matter can be described as,

Matter is anything that has occupies space (has mass and volume).

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Answer:

Matter

Explanation:

I took the test Edge 2022

Answer:

R and I will also change, but V will remain constant.

Explanation:

Explanation:

There are several methods to identify and categorize objects in space but the 3 important are:

•Mass/Size

•Revolution

•Gravity

Example:

If you look at the planet Mars you will identify it by many methods but the basic way to indentify it is by looking at it's gravitational pull, Mass and size of the planet and the revolution of the planet around the star.

You can also identify them by looking at their elements present in it (like mars is red due to presence of high amount of iron/red soil in it), and Like Saturn is mostly identified by it's rings. It's not always about planets but it's also about the asteroids, stars, Natural satterlites of planets (like moon) and more.

Hope this helps you

Have a nice day :)

The telescope created the data gathered by Kepler and his team.

What is a star?

A star is a large luminous astronomical body which produces light and heat energy as well as radiation.

There are billions of stars in the universe organized into galaxies.

The Sun is the star of our solar system.

The Kepler project produced a wide range of data products and documentation to assist the community in using data from the mission to help study both exoplanets and other astrophysical areas.

In the video, a mysterious star was observed which is 50 percent bigger and 1,000 degrees hotter than the Sun.

By mean of telescopes, it was observed that the dimming seen in the diet was dues to dust particles.

These data produced ranges from engineering data on the detectors to lists of planet candidates and includes many of the intermediate data products in the data processing path.

The Kepler first mission came to an end after four years when two of the four reaction wheels, used to point the spacecraft malfunctioned.

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Answer:

displacement=-21

distance=39

Explanation:

Answer:

Resistance, R = 2.5 Ohms

Explanation:

Given the following data;

Voltage = 10 V

Current = 4 A

To find the resistance;

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

\( V = IR\)

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

Making resistance, R the subject of formula, we have;

\( R = \frac {V}{I} \)

Substituting into the equation, we have;

\( R = \frac {10}{4} \)

Resistance, R = 2.5 Ohms

Therefore, the resistance of the resistor in the electrical circuit is 2.5 Ohms.

The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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The maximum delay before the pill is no longer usable can be calculated using the concept of half-life. The half-life of the radioactive isotope is 8 days, which means that after 8 days, half of the initial number of atoms will decay.

Therefore, if the initial number of atoms in the pill is 4 x 1014, after 8 days, it will be reduced to 2 x 10^14 atoms. After another 8 days, it will be reduced to 1 x 10^14 atoms, which is the minimum required for the pill to be still usable. Therefore, the maximum delay before the pill is no longer usable is 16 days (2 half-lives), after which the number of radioactive atoms will be less than the required minimum.

Radioactive iodine, a treatment for thyroid conditions, works by therapeutically damaging tissue. A single pill contains 4 x 10^14 atoms of the radioactive isotope with a half-life of 8 days. To remain usable, it must have at least 1.1 x 10^14 atoms.

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