two objects at different temperatures are placed in contact with each other but are insulated from the surroundings. will the temperature of either object change? explain.

Answer:

vitamins don't contain calories

A typical voltage for running an agarose DNA gel would be in the 4 - 10 volts/cm under horizontal electrophoretic conditions.

Agarose gel electrophoresis is a method of gel electrophoresis used in biochemistry, molecular biology, genetics, and clinical chemistry to separate a mixed population of macromolecules such as DNA or proteins in a matrix of agarose, one of the two main components of agarose.

Agarose is a natural polymer prepared from seaweed (red algae) and consists of the D-galactose and 3,6-anhydro-L-galactose.

Why agarose gel is used for DNA?

Agarose's high gel strength allows for the handling of low percentage gels for the separation of large DNA fragments.

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Answer:

Explanation:

The mass of an electron is small compared to the neutron and proton, so it's negligible. It's like adding zero to a number.

Answer:

Hello!

I do not have all ten listed out, however I can show you how to find out. First things first understand what the numbers mean on the table of elements. The number at the top is the atomic number. This represents how many protons an element has. This is also how many neutrons it has, because there is always the same number of protons and neutrons. The number at the bottom is the atomic mass. This is how much the atom weighs. To find the first 10 look for the elements with atomic numbers 1-10. It should be easy. I’ll give you the first one for example.

Hydrogen is the element with a atomic number of 1. Its atoms contain

-1 proton

- 1 neutron

-1 electron (also note the amount of electrons is equal to the amount of protons and neutrons)

Hydrogens atomic mass is (1.00784 u)

Lastly the symbol for hydrogen is (H)

Hope this helps!!!

If you plot the absorbance measurements of solutions vs. their concentrations, the slope is equal to molar absorptivity, if the path length is 1 cm

A = ε c l

A = Absorbance

ε = Molar absorption coefficient

c = Molar concentration

l = Optical path length

A ∝ ε c

Since A is only proportional to absorptivity and and not wavelength, out of the given options only option 2 is correct.

Therefore, if you plot the absorbance measurements of solutions vs. their concentrations, the slope is equal to molar absorptivity, if the path length is 1 cm

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Answer:

B

Explanation:

It becomes lighter so it rises

Answer:

tsunamis are waves created from A tsunami is a catastrophic ocean wave that is usually caused by a submarine earthquake, an underwater or coastal landslide, or the eruption of a volcano. Tsunamis can also result from the impact of a meteor or comet in a body of water. when one of these events happen all the water near the shore of it will drawn back toward where the tsunamis will form, the waves emerge into one and a tsunamis born, unlike normal waves the tsunami move very fast and they can get very big and more devastating.

a wave is caused by wind, The wind transfers some of its energy to the water, through friction between the air molecules and the water molecules. Stronger winds cause larger waves and a lot of them are not as dangerous as tsunamis, however that's not always the case, since waves like  Rogue waves are big and powerful enough to sink ships, ocean liners, and even oil platforms, same with tsunamis.

Explanation:

your darn welcome

This is due to the fact that occluded fronts combine two cold air masses, which causes one of the cold air masses to go downward.

When a warm air mass is sandwiched between two cold air masses, an occluded front occurs. In an occlusion, the warm front passes over the cold front, which dives beneath it.

In a front is obscured, the warm front is fully supplanted by the cold front, in which the warm air masses have completely disappeared. Furthermore, there are frequent shifts in the various weather producing circumstances because of the cold front's relatively low temperature.

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Depolarization refers to the change in electrical potential across a cell membrane, specifically reducing the negative charge inside the cell.

                   Depolarization is a change in the electrical potential across a cell membrane, such as a neuron or muscle cell. It involves a reduction in the negative charge inside the cell, leading to less negative or even positive membrane potential.

                   This change is primarily caused by the influx of positive ions, particularly sodium ions, through voltage-gated ion channels in response to a stimulus. Depolarization is crucial for generating and transmitting action potentials, the electrical signals neurons use to communicate.

                  When depolarization reaches a threshold, it triggers an action potential, allowing the electrical signal to propagate along the cell.

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Explanation

a uniformly accelerated motion is the one in which the acceleration of the particle throughout the motion is uniform,to fidn the time take we can use the formula:

Step 1

a)Let

b) now, replace

therefore, the answer is 2 seconds

I

The experiment will be impacted by an overestimation of the weights due to the scale registering each weight as three kilograms greater than their actual values.

The calibration error of the scale, which registers each weight as three kilograms greater than it actually is, will lead to an overestimation of the weights used in the experiment. This overestimation can have several effects on the experiment and its results.

Firstly, the calculated forces or loads applied by the weights will be higher than their actual values. This can affect the measurements and analysis of the performance of the assistive device. If the device is designed to handle specific loads, the overestimated weights may give a false impression of its capabilities and efficiency.

Secondly, the overestimation of weights can introduce errors in any calculations or comparisons made during the experiment. For example, if the experiment involves comparing the force required to lift different weights, the overestimated weights can skew the results and make it difficult to accurately evaluate the device's efficiency.

To mitigate this impact, it would be necessary to account for the calibration error of the scale and make appropriate adjustments to the recorded weights during the data analysis phase. This would help ensure that the experiment's results and conclusions are based on accurate measurements and reflect the true performance of the assistive device.

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The horizontal force is 44 kg m/s². The ratio of this force to the skater's weight is 0.69 kg m/s²/kg.

The track contains straight stretches and 16-metre-diameter semicircles for short-track speed skating. Suppose that a skater weighing 64 kg completes the turn at a constant speed of 11 m/s.

1) The horizontal force on the skater is determined by the centripetal force equation, F = mv²/r, where F is the force, m is the mass, v is the velocity, and r is the radius.

Using the given parameters, the horizontal force is therefore 64 kg x 11 m/s²/16 m = 44 kg m/s².

2) The ratio of this force to the skater's weight can be calculated by dividing the force (44 kg m/s²) by the weight (64 kg).

(44 kg m/s²) ÷64 kg = 0.69 kg m/s²/kg.

This gives a ratio of 0.69 kg m/s²/kg.

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Answer:

c. convection currents in the asthenosphere

Explanation:

Answer:

it's 10 you can see it goes by 2 and the others fo by 1 pretty simple

Answer:

Explanation:

for circular motion we are expected to solve for Angular Displacement it is measured in radian

Measurement of Angular Displacement.

we can measure it using the following relation

∅= s/r

where

s = the distance travelled by the body, and

r = radius of the circle along which it is moving.

given that

circumference c,  s= 400 m

r= ?

we have to solve for the radius

we know that circumference

\(c= 2\pi r\)

400= 2*3.142*r

400= 6.282*r

divide both sides by 6.284 we have

400/6.284

r= 63.63 m

Angular  displcament

∅= 400/63.63

∅= 6.28 radians

The SI unit of K so that the equation Velocity = K x density is correct is given as

K=m^4/s-kgK= m4/s−kg

Velocity is described as the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.

The SI unit of velocity is m/s and the Si unit of density is kg/m^3kg/m3 .

Adding the SI units of both quantities, we have that  :

m/s=K\times kg/m^3m/s=K×kg/m3

In terms of dimensions,

[LT^{-1}]=K\times [ML^{-3}][LT−1]=K×[ML−3]

Dimension of K is :

[K]=[M^{-1}L^4T^{-1}][K]=[M−1L4T−1]

SI unit of K is :

K=m^4/s-kgK=m4/s−kg

Hence,  the required solution is  K=m^4/s-kgK=m4/s−kg

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Answer:

1.4765 Hz

Explanation:

right on acellus

The frequency of an event is the inverse of time period.The frequency of the kid on bouncing the pogo stick is 1.47 Hz.

Frequency of an event is is the number of occurance of that event in unit time. It is the inverse of time period of that event. Hence frequency has the unit of s⁻¹ which is equivalent to Hz.

The frequency of a wave is the number of wave cycles per unit time. Frequency is directly related to the energy of the vibration or wave. Hence, as the frequency increases, energy increases.

Given that, the number of oscillations from the bouncing of the pogo stick is 22 times in 14.9 seconds. Thus , number of oscillations in 1 second is:

22 /14.9 s = 1.47 Hz.

Therefore, the frequency of the event created by the kid is 1.47 Hz.

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Explanation:

(i) The horizontal component of the tension in the right wire points right, and the horizontal component of the tension in the left wire points left.  Since these components are equal and opposite, the resultant horizontal force is 0.

∑Fₓ = 15 N cos 20° − 15 N cos 20°

∑Fₓ = 0 N

(ii) ∑Fᵧ = 15 N sin 20° + 15 N sin 20°

∑Fᵧ = 10.26 N

i) The resultant horizontal component of the tension forces is 0N

ii) The resultant vertical component of the tension forces is 10.26N

iii) The sum of force along the horizontal is zero because the force has the same magnitude and moving in the opposite direction.

i) From the given figure, the horizontal component of the force is given as;

\(F_x = + 15 cos 20^0 + (-15cos20^0)\\F_x = + 15 cos 20^0 -15cos20^0\\F_x =0\)

The sum of force along the horizontal is zero because the force has the same magnitude and moving in the opposite direction.

ii) The vertical component of the force is expressed as

\(F_y = + 15 sin 20^0 + 15sin20^0)\\F_y = 2(15sin20^0)\\F_y=2(5.13)\\F_y=10.26N\)

Hence the resultant vertical component of the tension forces is 10.26N

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Answer:

1.) 0.68 g/cm^3

2.) 4.3 × 10^16 m^2

Explanation:

Given that the radius of the planet Saturn is 5.85 ✕ 107 m, and its mass is 5.68 ✕ 1026 kg.

Where (The volume of a sphere is given by 4/3 πr3.)

Substitutes r into the parameters

V = 4/3π × ( 5.85 × 10^7)^3

V = 8.39 × 10^23 m^3

Convert cubic meters to cubic centimeters by multiplying the result by 1000000

V = 8.39 × 10^29 cm^3

The mass in gram will be

5.68 ✕ 10^26 × 1000 = 5.68 × 10^29g

Density = mass/ volume

Substitute all the parameters into the formula

Density = (5.68 × 10^29) / (8.39 × 10^29)

Density = 0.68 g/cm^3

2.) The surface area of a sphere is given by 4πr^2.

Substitute r into the formula

Surface area = 4π × (5.85 ✕ 10^7) ^2

Surface area = 4.3 × 10^16 m^2

Answer:

Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?

A. Materials that are insulators and conductors have a high

resistance to electricity.

Part B

Which sentence from "Energy Story" best supports the answer in Part A?

B. "Its resistance measures how well something conducts

electricity."

Explanation:

To proceed with the analysis, we need to make a few assumptions and simplifications.

We will assume that the arm is a rigid body and neglect the mass and length of the hand, considering only the mass and length of the cylindrical portion of the arm.The moment of inertia of the man's arm, including the hand, can be calculated using the formula for the moment of inertia of a uniform cylinder.

The moment of inertia of the man's arm, including the hand, can be calculated using the formula for the moment of inertia of a uniform cylinder:

To calculate the moment of inertia, we need to determine the radius of the arm. Unfortunately, the radius is not given in the provided information.

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Answer:

acceleration =9.2089

Explanation:

force acting: gravity, normal force exerted by the box

F=m*a

= 25*g

=25*gcos(20)

= 230.224N

acceleration= gcos(20)

= 9.8*0.939

acceleration =9.2089

The heat supplied to increase the temperature of the substance is used up to transform the state of matter of that substance. Hence the temperature of the substance stays constant until the phase transition completes.

In chemistry, phase transitions or phase changes are the physical processes of transition between a state of a medium of a substance. This term is used to refer to changes in the basic states of matter such as solid, liquid, and gas.

When a substance is heated or cooled and approaches a temperature corresponding to one of its phase transitions. Further gain or loss of heat results in diminishing or enhancing intermolecular attractions, instead of changing the molecular kinetic energies.

While a substance is undergoing a change in state which is a phase transition, its temperature remains constant. The horizontal lines on the graph represent the transition between the states of the substances X and substances Y.

When adding heat leads to the temperature of a substance being increased as the kinetic energy of the molecules of the substance increases. The conduction of heat occurs when these molecules start vibrating with high energy, Hence the heat transfer from one molecule to another.

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The force pushing down on the table is 147,000 pounds.

     
Explanation:

   
To calculate the force pushing down on the table, we need to determine the area of the table in square inches, and then multiply that by the pressure exerted by the atmosphere.

   
The area of the table is 50 inches x 200 inches = 10,000 square inches.

     
The pressure exerted by the atmosphere is 14.7 pounds per square inch.

   
So the force pushing down on the table is:

10,000 square inches x 14.7 pounds per square inch = 147,000 pounds.

If normal atmospheric pressure is 14.7 pounds/sq in at the surface of the earth. The force pushing down on a table measuring 50 inches wide by 200 inches long is 147,000 pounds.

This is because the pressure is defined as force per unit area, and the area of the table is 50 inches x 200 inches = 10,000 square inches. So, if the normal atmospheric pressure at the surface of the earth is 14.7 pounds/square inch, then the force pushing down on the table is simply pressure x area = 14.7 pounds/square inch x 10,000 square inches = 147,000 pounds.

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During sewer pipe installation using a laser, a laser beam is projected through the pipe until it hits a target beam(c).

The target beam acts as a reference point or marker that helps align the pipe correctly during installation. By hitting the target beam, the laser beam indicates the desired direction and position for the pipe, ensuring accurate installation.

The target beam is often placed at the other end of the pipe or at specific intervals along the pipe's path, allowing the construction crew to adjust the alignment and slope as necessary. This process helps ensure the proper installation of the sewer pipe, minimizing potential issues and ensuring efficient drainage.

So c is correct option.
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The moment of inertia of the cylinder about the horizontal axis parallel and tangent to the cylinder is 3MR²/2.

The moment of inertia (Icm) of the cylinder about its symmetrical axis is calculated using the formula MR^2/2, where M represents the mass of the cylinder and R represents its radius.

To find the moment of inertia of the cylinder about the axis parallel and tangent to the cylinder, we can use the parallel axis theorem. According to the parallel axis theorem, the moment of inertia about an axis parallel to and at a distance 'd' from the axis passing through the center of mass is given by:

I = Icm + Md^2

In this case, the axis of rotation is parallel and tangent to the cylinder, so the distance 'd' from the axis passing through the center of mass is equal to the radius 'R'. Substituting the values into the equation:

I = Icm + MR^2

I = MR^2/2 + MR^2

I = (1/2 + 1)MR^2

I = (3/2)MR^2

Therefore, the moment of inertia of the cylinder about the given axis is (3/2)MR^2.

The correct answer is (D) 3MR^2/2.

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Answer:

The evidence is : Light reflects when it hits a surface.

Explanation:

The meaning of dual wave particle nature is that light exhibits both wave and particle properties. This is to say that light is a particle in form of a photon and a wave due to flow of photons. The properties displayed by light such a reflection of light and scattering of light are possible due to the properties of small particles/photons.  

Answer:

Light reflects when it hits a surface

Explanation:

Answer:

A. Thermal energy will move from the water to the ice.

B. Thermal energy will move from air to the water.

C. Thermal energy will move from the ice to the air.

D. Thermal energy will move from the water to the air.

A and B are correct

Explanation:

Because thermal energy will move from the water to the ice

Answer: Collinear forces are forces that have a common line of action, i.e. the line of action of the forces lies along a single straight line.

Explanation: