Which object requires more force to move?

automobile

paperclip

skateboard

Answer:

1.  0.102 mol/kg.

2. 0.444 mol/kg.

Explanation:

To calculate molality, we need to know the moles of solute (NaCl) and the mass of the solvent (water) in kilograms. First, we need to convert the mass of NaCl to moles by dividing by its molar mass. Then we convert the mass of water to kilograms. Molality (m) is equal to moles of solute divided by kilograms of solvent.

First, we need to convert the mass of glucose to moles by dividing by its molar mass. Then we convert the volume of water to kilograms. Molality (m) is equal to moles of solute divided by kilograms of solvent. Finally, we need to round the answer to three significant figures.

SMM2 refers to the Standard Method of Measurement 2. It is a document that specifies the method and processes used in measuring buildings and civil engineering works. SMM2 is commonly used in the construction industry.

The following are explanations of the clauses under Standard Method of Measurement 2 (SMM2):

i. D.10: This clause under SMM2 relates to the painting of metal and timber surfaces. It stipulates that when painting the surfaces of timber or metal, the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

ii. D.12.4: This clause under SMM2 refers to the construction of walls using concrete blocks. It states that the concrete blocks used should have a minimum density of 1500 kg/m3. It also outlines specific measurements for the thickness of the mortar to be used for bonding the blocks together. The clause further specifies the measurement of the joint thickness between blocks.

iii. D.12.6: This clause under SMM2 refers to the rendering of walls with a cement mortar mix. It specifies that before rendering, the surface of the wall must be clean, dry, and free of debris. It also outlines specific measurements for the thickness of the rendering to be applied to the wall. The clause then stipulates that the rendering should be finished with a smooth surface that conforms to the architect's specifications.

iv. D.12.8: This clause under SMM2 refers to the painting of interior plastered walls. It stipulates that the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

Learn more about concrete blocks: https://brainly.com/question/28034759

#SPJ11

Answer:

3×10^6

Explanation:

frequency is the speed of light ( c) which is a constant number divided the wavelength

f = 3×10^6 / 1.0

Answer:

It will apply the greatest pressure of an area of 1.

Explanation:

To find pressure use the formula P = F/A

P = 100/1

P = 100

Answer:

10 N / cm^2

Explanation:

The Formiula is P = F / A

P = presure

F = Force in Newtons

A = area.

The answer is the smaller the area the larger the pressure.

The smallest area you have given us is 10 cm^2

The Pressure = 100N / 10 cm^2

Pressure = 10 N/cm^2  

Note: the units are not exactly standard units, but I've given the answer the way the question offers the units.

Answer:

yes it is

Explanation:

The gravitational force exerted by one peach on the other can be calculated using the formula F = G(m1m2)/r²,

where F is the force, G is the gravitational constant (6.67 x 10^-11 Nm²/kg²), m1 and m2 are the masses of the two peaches, and r is the distance between their centers of mass.

(a) When the separation between the peaches is 0.25 m, the force exerted by one peach on the other is:

F = (6.67 x 10⁻¹¹ N×m²/kg²) × (0.16 kg × 0.16 kg) / (0.25 m)² = 1.07 x 10⁻⁹N

(b) When the separation between the peaches is 0.50 m, the force exerted by one peach on the other is:

F = (6.67 x 10^-11 N×m²/kg²) ×(0.16 kg × 0.16 kg) / (0.50 m)²= 2.67 x 10⁻¹⁰ N

Therefore, the gravitational force exerted by one peach on the other decreases as the distance between them increases. This is because the force of gravity is an inverse square law, meaning that the force decreases proportionally to the square of the distance between the objects.

To know more about  inverse square law, visit :

https://brainly.com/question/30562749

#SPJ1

The temperature in Kelvin (K) is equal to the temperature in Celsius (°C) plus 273.15.

The Celsius and Kelvin temperature scales are two common temperature scales used in science. The relationship between these two scales can be described by a simple equation.

To convert a temperature from Celsius to Kelvin, you add 273.15 to the Celsius temperature. This equation is derived from the fact that the Kelvin scale starts at absolute zero, which is -273.15°C. Therefore, to account for the offset between the two scales, 273.15 is added to the Celsius temperature to obtain the equivalent temperature in Kelvin.

For example, if you have a temperature of 25°C, you can convert it to Kelvin by adding 273.15:

25°C + 273.15 = 298.15 K

So, 25°C is equivalent to 298.15 K.

This equation holds true for any temperature value in Celsius. By adding 273.15 to a Celsius temperature, you obtain the corresponding temperature in Kelvin.

In summary, the equation K = °C + 273.15 represents the conversion between Celsius and Kelvin temperatures, where K represents the temperature in Kelvin and °C represents the temperature in Celsius. Adding 273.15 to a Celsius temperature gives the equivalent temperature in Kelvin.

Learn more about temperature here: brainly.com/question/14585175

#SPJ11

a is the correct answer

Explanation:

no.of proton defines atomic number in an atom

Answer: a

Explanation:

An atomic number is the number of protons found in the nucleus. The number of protons is equal to the number of electrons. The atomic mass the atomic number add the amount of neutrons.

Answer:

i dont undertsnad what do u ned hep wit?

Explanation:

Answer:

motion

Explanation:

rest and stationary us a situation where an object is constant-not moving

Answer:

HI!!!

Explanation:

Answer:

what is your questions

The angular resolution of the circular lens used in the experiment is approximately 0.0527. A smaller angular resolution indicates a higher ability to distinguish fine details in the observed object or system.

To calculate the answer of experiment that uses blue light of wavelength 650nm and a circular lens with a diameter of 15mm we need to find the angular resolution of the circular lens. The angular resolution can be determined using the formula:

Angular resolution = 1.22 * (wavelength / diameter)

Plugging in the values, we have:

Angular resolution = 1.22 * (650 nm / 15 mm)

To ensure consistent units, we convert the wavelength to millimeters:

Angular resolution = 1.22 * (0.65 mm / 15 mm)

Performing the calculation, we get:

Angular resolution ≈ 0.0527

Therefore, the angular resolution of the circular lens in this experiment is approximately 0.0527, without units.

Learn more about wavelength

brainly.com/question/31322456

#SPJ11

Answer:

i have absolutly no idea how to do it but i looked it up and your answer should be B. i could be wrong but thats what the web told me

Answer:

the higher up an object is, the more potential energy it has

Explanation:

Answer:

\(\huge\boxed{\sf E = 42 \ J}\)

Explanation:

Force = F = 6 N

Distance = d = 7 m

Energy = E = ?

Here, Energy is gained in the form of work done. So, the formula will be:

E = Fd

Put the given data in the above formula.

E = (6)(7)

\(\rule[225]{225}{2}\)

Answer:

Explanation:

Radius of first spherical ball =

2

2

​

cm=1cm

Radius of second spherical ball =

2

2

3

14.5

​

​

cm=

3

14.5

​

cm

Let the radius of the third ball be r cm.

Radius of the main spherical ball =

2

5

​

cm=2.5cm

Volume of main spherical ball = Volume of spherical ball  1+Volume of spherical ball 2+ Volume of spherical ball 3

Volume of a sphere =

3

4

​

πr

3

So,  

3

4

​

π×2.5

3

=

3

4

​

π1

3

+

3

4

​

π(

3

14.5

​

)

3

+

3

4

​

πr

3

⇒2.5

3

=1

3

+(

3

14.5

​

)

3

+r

3

⇒r

3

=15.625−1−14.5

⇒r

3

=0.125=0.5×0.5×0.5

⇒r=0.5

The answer for (iv) is;

E.M.F of the battery refers to the chemical energy in the battery that is being converted into electrical energy for the flow of electrons to carry current in a circuit.

Answer:

... As has been previously discussed, heat is not something that is contained in an object.

Explanation:

A motorcycle traveling at 87.3 mi/hr for 0.85 hours, the acceleration of the motorcycle is 38.47 miles per hour squared (mi/\(hr^2\)) if the final- velocity of a motorcycle is 120 mi/hr.

The acceleration of the motorcycle= (final velocity - initial velocity) / time

(initial velocity=at the beginning of the time interval, final velocity= velocity at the end of the time interval, time= the duration of the interval)

Here, initial velocity =87.3 mi/hr, the final velocity = 120 mi/hr, and the time interval = 0.85 hours.

acceleration = (120 mi/hr - 87.3 mi/hr) / 0.85 hours

acceleration = 32.7 mi/hr / 0.85 hours

acceleration = 38.47 mi/\(hr^2\)

Hence, the acceleration of the motorcycle is 38.47 miles per hour squared  (mi/\(hr^2\)) if the final velocity is 120 mi/hr.

Learn more about the calculation of the acceleration here.

https://brainly.com/question/13001406

#SPJ9

Part A: The radius of curvature of the lens surface is approximately 3.17 m. Part B: The focal length of the lens is approximately 1.59 m.

Part A:

To find the radius of curvature of the lens surface, use the formula for the radius of the nth bright ring in a planoconvex lens:

r = √(n × λ × f),

where r = radius of the nth bright ring, λ = wavelength of light, and f = focal length of the lens.

In this case, n = 42 (since the last bright ring is observed at the edge), λ = 580 nm (converted to meters, so λ = 580 × 10⁻⁹ m).

Rearranging the formula, solve for f:

f = r² / (n × λ).

Plugging in the values:

f = (0.021 m²) / (42 × 580 × 10⁻⁹ m).

Calculating this expression gives:

f = 3.17 m.

Therefore, the radius of curvature of the lens surface is approximately 3.17 m.

Part B:

The focal length of the lens can be determined using the formula:

f = R / 2,

where R = radius of curvature.

Plugging in the value for the radius of curvature obtained in Part A:

f = 3.17 m / 2.

Calculating this expression gives:

f = 1.59 m.

Therefore, the focal length of the lens is approximately 1.59 m.

Find out more on radius of curvature here: https://brainly.com/question/29595940

#SPJ4

The wavelength of the first line in the Lyman series of the hydrogen spectrum is equal to 121.6 nm and it will be ultraviolet radiation.

When an electron transitions from its lowest energy state of n = 1 to n = 2 (where n is the main quantum number), the Lyman series, a hydrogen spectral series of transitions and ultraviolet emission lines are produced. The transitions are given Greek letter names, such as Lyman-alpha, which goes from n = 2 to n = 1.

Given Z = atomic number and R = Rydberg's constant (109677 cm-1)

since for the first line of the Lyman series, the electron is de-exited from the excited state (i.e., n2=2) to the ground state (i.e., n1=1).

1/∧ =R(1/n1^2- 1/n2^2)

1/∧= 109677(1/1 - 1/4)= 109677(3/4) = 121.6nm

As a result, we know that the wavelength of the first line in the Lyman series of the hydrogen spectrum is equal to 121.6 nm. As the range of ultraviolet radiation is from 100 nm to 400 nm. So it will be ultraviolet radiation.

To learn more about Lyman series click here https://brainly.com/question/29597178

#SPJ4

Given,

The force applied by each person who is pushing the object, F=50 N

The frictional force, f=20 N

The frictional force is the force that opposes the motion of the object. As the people are pushing the object to the right, the frictional force will be directed to the left. And as the force with which people are pushing is greater than the frictional force, the net force will also be directed towards the right.

The net force is given by,

On substituting the known values,

Therefore the net force on the object is 80 N to the right.

Thus the correct answer is option 4.

Given:

Height = 53 m

Given that the rock is dropped from the top of a bridge above the river, let's answer the following questions:

• (a). The acceleration of the rock as it falls.

Since the rock is in free fall, the acceleration of the rock as it falls will be the acceleration due to gravity.

a = 9.8 m/s²

Therefore, the acceleration of the rock as it falls is 9.8 m/s².

• (b). How long does it take to hit the water?

To find the time, apply the formula:

Where:

s = 53 m

t is the time

a is the acceleration

u is the initial velocity = 0 m/s

Let's solve for the time, t:

Therefore, the time is 3.29 seconds.

(c). If the rock is dropped horizontally instead, there will be no change in the vertical velocity.

The time will also not change.

The time will be 3.29 seconds

ANSWER:

(a). 9.8 m/s^2

(b). 3.29 seconds

(c). 3.29 seconds

The correct equation for the index of refraction is v_red/v_blue = n_blue/n_red.

The correct equation for the index of refraction (n) in a medium, such as glass, is given by Snell's law:

n = c/v,

where c is the speed of light in a vacuum and v is the speed of light in the medium. According to the equation, the index of refraction is the ratio of the speed of light in a vacuum to the speed of light in the medium.

In the case of the given information, we have the respective indices of refraction for blue light (n_blue = 1.4636) and red light (n_red = 1.4561) in glass. Using Snell's law, we can set up the following equations:

n_blue = c/v_blue,

n_red = c/v_red.

Dividing these equations, we get:

n_blue/n_red = (c/v_blue) / (c/v_red) = v_red/v_blue.

We can rearrange this equation to solve for the ratio of the speeds of light in glass for blue and red light:

v_red/v_blue = n_blue/n_red.

Therefore, the correct equation for the index of refraction is v_red/v_blue = n_blue/n_red.

Learn more about index of refraction

https://brainly.com/question/12469161

#SPJ11

Answer:

mars is a fourth planet of the sun and the second planet in the solar system

moon is a natural satellite of the earth it isthe fifth largest moon in the solar system

The given points are

(0.47, 0.4905)

(0.52, 0.6867)

(0.58, 0.8829)

(0.64, 1.0791)

The formula for calculating slope is expressed as

slope = (y2 - y1)/(x2 - x1)

where

y2 and y1 are final and initial coordinates of y

x2 and x1 are final and initial coordinates of x

Picking these points from the given points, we have

when x1 = 0.52, y1 = 0.6867

when x2 = 0.58, y2 = 0.8829

slope = (0.8829 - 0.6867)/(0.58 - 0.52) = 0.1962/0.06

slope = 3.27

We would plot the corresponding x and y values on the line. The graph is shown below

According to the question the speed of pulse is = 0.33m/s

Velocity is the pace and direction of either an object's movement, whereas speed is now the time rate which an object is travelling along a path. In other words, velocity is a vector, whereas speed would be a scalar value. If you determine how far an object travels in a certain amount of time, you can calculate its speed.For instance, an automobile is moving at a pace of 70 miles per hour if it covers 70 miles in an hour .

The equation for speed can be obtained by simply dividing time by distance.

To learn more about speed visit:

https://brainly.com/question/13232071

#SPJ1

\(\boxed{\underline{\bf \: ANSWER}}\)

The current sensitivity of a galvanometer depends upon the following factors :-

___________

Hope it helps.

RainbowSalt2222