The speed of the car at the first point is 18 m/s.
How do we calculate the initial speed?
The equation we can be used for finding the speed of the first point is:
⇒ Δx = ½ (v + v₀)t
From this we can easily calculate v₀ i.e,
⇒ v₀ = 2Δx/t - v
According to the question it is given that,
Distance between two points is , Δx =120 m,
Time t = 8.0 s,
Speed at second point is, v = 12 m/s,
Speed at first point is, v₀ = ?
From above formula,
⇒ v₀ = 2Δx/t - v
= 2×120/8 - 12
= 240-96/8
= 144/8
= 18 m/s
Therefore the speed at first point is 18 m/s.
To know more about the calculation of speed, visit the given link:
https://brainly.com/question/19905871
#SPJ4
Anyone know the answer
Early sulfate reducers set the stage for the evolution of ______, the first form of which harvested hydrogens from h2s..
a) fermentation
b) photosynthesis
c) aerobic
d) respiration
Early sulfate reducers set the stage for the evolution of
b) photosynthesis, the first form which harvested hydrogens from h2s.
What is photosynthesis?The process of turning light energy into chemical energy suitable for the needs of the organism is called photosynthesis. The process begins when the chlorophyll-containing proteins absorb light energy. Chlorophyll a and Chlorophyll b are the two types of chlorophyll. In bacteria, chlorophyll is kept in the cell membrane, whereas it is kept in organelles called chloroplasts in plants. The electrons are used to separate a hydrogen ion from a water molecule after being excited by the light energy. After that, ion gradients are made using the hydrogen ions to produce ATP and NADPH. The byproduct is the release of oxygen. The light-dependent reactions are what we refer to as these processes.The two energy-carrying molecules ATP and NADPH are then added to the Calvin Cycle in plants along with carbon dioxide to produce the glucose molecule, which has a longer half-life than the other two energy-carrying molecules.
The Krebs Cycle is used by bacteria. Carbon fixation, reduction reactions, and RuBP regeneration all take place in three steps.
Even though they only occur when light is present, these processes are known as light-independent reactions.
To learn more about photosynthesis, refer
to https://brainly.com/question/26117248
#SPJ4
You combine 1.25 g of germanium, ge, with excess chlorine, cl2. the mass of the product gexcly, is 3.69 g. determine the empirical formula of the product gexcly.
The empirical formula of the product gexcly is Ge4Cl.
a.) In empirical formula problem one must first find the mass % of the elements in the compound. Since the total mass of the final product was 3.69g we find that:
3.69g total-1.25g germanium = 2.44g chlorine
1.25g germanium/3.69 g total (100) = 33.88%
44g chlorine/3.69 g total (100) = 66.12%
b.) Then change the % to grams
33.88%→3.38g of Ge
72.23%→6.61g of Cl
c.) Next, divide all the masses by their respective molar masses.
3.38g /72.64gm-1 = 0.0465 moles Ge
6.61g/35.45gm-1 = 0.1864 moles Cl
d.) Pick the smallest answer of moles and divide all figures by that.
0.04 moles Ge / 0.0465 = 1
0.1864 moles Cl / 0.0465 = 4.00
Since our answer for chlorine is a whole number, we use them as coefficients for the product
e.) Lastly, the coefficients calculated in the previous step will become the subscripts in the chemical formula.
Ge = 4
Cl = 1
Ge4Cl
To learn more about the difference between empirical and molecular formula. Click, https://brainly.com/question/13058832
#SPJ4
A glass stopper has a volume of 16 cm3 and a mass of 40g. calculate the density of glass in g/cm3 and in kg/m3.
A glass stopper has a volume = 16 cm^3
mass = 40 g
Therefore, density (g/cm^3) = MASS/ VOLUME
DENSITY = 40/16 g/cm^3
Density = 2.5 g/cm^3
In kg/m^3 => 2.5*10^-3 kg / 10^-6m^3 = 2500 kg/m^3
The definition of Density is the amount of matter in a given space, or volumeTo finding density D=m/v or Density = mass/volumeCommon units for density g/cm^3 or g/mL or kg/m^3 or kg/LDensity of water = 1 g/mLdensity is a physical propertyhelium is less dense than air while carbon dioxide is more dense than airSalt water is denser so we don't sink as easily.To know more about DENSITY visit : https://brainly.com/question/15164682
#SPJ4
The standard deviation of a sample was reported to be 30. the report indicated that deviation squared ( ) is equal to 7200. what has been the sample size?
The sample size of the standard deviation of a sample that was reported to be 30 is calculated as 8.
What is Sample size determination?The process of deciding how many observations or replicates to include in a statistical sample is known as sample size determination.
Any empirical study with the aim of drawing conclusions about a population from a sample must take into account the sample size as a crucial component.
CalculationStandard deviation = square root of ∑(x-average)^2 / N = 30
∑(x-average)^2 = 7200
Putting the values in standard deviation formula where N = sample size
30 = sqrt of ∑(x-average)^2 / N
Then squaring off on both sides,
900 = 7200/N
⇒N = 8
To know more about sample size, visit:
https://brainly.com/question/13450072
#SPJ4
A car accelerates at 2.0 m/s2 for 10 seconds. The car has an initial velocity of 10 m/s. What is the final velocity of the vehicle?
Answer: The final velocity will be 30 m/s
Explanation:
[tex]v_{i} = 10 m/s\\a = 2.0m/s^{2} \\t = 10s\\v_{f} = ?\\\\a = \frac{v_{f} - v_{i}}{t} \\2.0 = \frac{v_{f} - 10}{10} \\20 = v_{f} - 10\\v_{f} = 30[/tex]
Answer:
30 m/s
Explanation:
[tex]\boxed{\begin{array}{c} \text{\underline{The Constant Acceleration Equations (SUVAT)}}\\\\\begin{aligned}v&=u+at\\\\s&=ut+\dfrac{1}{2}at^2\\\\ s&=\left(\dfrac{u+v}{2}\right)t\\\\v^2&=u^2+2as\\\\s&=vt-\dfrac{1}{2}at^2\end{aligned}\end{array}}[/tex]
[tex]\boxed{\begin{minipage}{9 cm}s = displacement in m (meters)\\u = initial velocity in m/s (meters per second)\\v = final velocity in m/s (meters per second)\\a = acceleration in m/s$^{2}$ (meters per second per second)\\t = time in s (seconds)\\\\When using SUVAT, assume the object is modeled\\ as a particle and that acceleration is constant.\end{minipage}}[/tex]
Given:
u = 10 m/sv = a = 2.0 m/s²t = 10 sSubstitute the given values into v = u + at and solve for v:
[tex]\begin{aligned}v & = u+at\\\implies v & = 10 + 2(10)\\& = 10 + 20\\& = 30\; \sf m/s\end{aligned}[/tex]
Therefore, the final velocity of the vehicle is 30 m/s.
Can you please answer the question. Thank you!
From the Newton's first law, we can see that the impressed force is equation the rate at which the momentum changes.
F = m(v - u)/t
F = force applied
m = mass of the body
v = final velocity
u = initial velocity
t = time
1) Deceleration of the person wearing the seatbelt is; 0 - 20/ 0.1 = -200 m/s^2
2) Force exerted = 50 Kg * ( -200 m/s^2) = -10000 N
3) Deceleration of the person stopped by the dashboard = 0 - 20/ 0.01 = -2000 m/s^2
4) Force exerted by the dash board on the person = 50 Kg * (-2000 m/s^2) = -100000 N
Learn more about force:https://brainly.com/question/13191643
#SPJ1
An athlete runs a marathon 42 195 km in 2h 5mins 42s. Convert in to m/s
The Speed of the athlete is 5.59 m/s
What is the speed of the athlete in m/s?Speed is defined as the ratio of the distance covered and the time taken
Speed = distance/timeThe units of speed can either be m/s, km/hr, mil/hr, etc.
The distance covered by the athlete = 42.195 km
Distance in meter = 42195 * 1000 = 42195 m
Time taken = 2 * 3600 s + 5 * 60 s + 42 s
Time taken = 7542 s
Speed = 42195 m/7542 s
Speed = 5.59 m/s
In conclusion speed is ratio of distance and time taken.
Learn more about speed at: https://brainly.com/question/13943409
#SPJ1
What physical developments typically accompany adolescence?
Select all that apply.
O development of reflexes and motor skills
increased levels of hormones in the blood
O growth of the brain's frontal cortex
O increased risk of heart disease
Answer:increases levels of hormones in the brain
Explanation: because when you go through puberty you start to get more hormones
What do we mean when we say we assume divisibility in a linear programming solution?
The final solution sales will always be fractions. The final solution deals do not need to be integers.
Linear programming (LP) or Natural Optimization is the issue of maximizing or underestimating a straightforward work subject to linear restrictions.
What is Linear Programming?The problem of maximizing or minimizing a straight work subject to linear constraints is known as linear programming (LP) or direct optimization.Equities or imbalances could be the constraints. Among the advancement issues are profit and loss calculations.Linear programming problems are a type of optimization problem in which the feasible region is determined and the arrangement is optimized to have the highest or lowest esteem of the work.The various types of linear programming are as follows: To solve linear programming problems, the Simplex method is used.R is a programming language used to solve linear programming problems. To solve linear programming, a graphical method is used.To learn more about linear programming, visit;
https://brainly.com/question/15417573
#SPJ4
A large crate of emergency supplies is dropped from a hovering helicopter. the crate has fallen for 2.90 s calculate the displacement of the crate during this time.
By using uniform motion, the displacement of a fallen crate after 2.9 seconds is 41.209 meters.
We need to know about uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
t = 2.90 s
vo = 0 m/s
a = g = 9.8 m/s²
By substituting the given parameters, we can calculate the displacement with the third equation
s = vo . t + 1/2 . a . t²
s = 0 . 2.9 + 1/2 . 9.8 . 2.9²
s = 0 + 41.209
s = 41.209 m
Find more on uniform motion at: https://brainly.com/question/28040370
#SPJ4
The isolated point charge of q = 15 nc is in a vacuum. determine (a) the magnitude of the electric field at point p that is 0.20 m to the right of the positive charge.
The magnitude of the electric field at point P which is 0.20 m to the right of the positive charge is 3,3375 N/C.
The electric field(E) due to an isolated point charge is
E= KQ/r^2
Here K is the Electrostatic Constant = 1/4π∈ = 9 x 10^9 N m^2/C^2
Q is the magnitude of the charge
r is the distance of the point from the charge
Putting q= 15 nC and r = 0.20 m in the given equation
E = 9 x 10^9 x 15 x 10^-9/(0.20)^2
E = 3375 N/C
Hence, the magnitude of the electric field at point p which is 0.20 m to the right of the positive charge is 3,3375 N/C.
To know more about "electric field", refer to the link given below:
https://brainly.com/question/8971780?referrer=searchResults
#SPJ4
What is the moons mass
Answer:
10^24 kilo
Explanation:
the moon's mass is 10^24
What is the decibel level of a sound that is twice as intense as a 90.0-db sound?
The decibel level of a sound that is twice as intense as 90dB is 93.013dB.
What is a decibel level?
Sound intensity is the amount of sound energy in a limited space. It is measured in decibels (dB). The decibel scale is logarithmic, meaning that loudness is not directly proportional to sound intensity. Instead, the intensity of the sound increases very quickly. This means that a sound of 20 dB is 10 times more intense than a sound of 10 dB. Also, the sound intensity at 100 dB is a billion times stronger compared to the sound at 10 dB.To learn more about decibel level, refer to:
brainly.com/question/23944898
#SPJ4
Methane is compressed adiabatically from 100kpa and 25oc to 200kpa. what is the minimumcompressor exit temperature possible? explain
The answer to the given question is 820 Kelvin. Gauss' Law demonstrates how electric fields, E, can be produced by static electricity, q. Gauss' Law, which bears the name of German physicist Carl Friedrich Gauss, is the third of Maxwell's four equations. According to Gauss' Law, an electric charge, qv, or static electricity, produces an electric field, E. (voltage).
This question is an application of Gauss Law, which states that the pressure P and temperature T of an ideal gas are directly proportional to one another. In other words, adiabatic increase in pressure will result in the same rise in temperature. Mathematically,
it can be written as:
P1/ T1 = P2/ T2
Therefore, Temperature T2 = 275 kPa * 298K / 100 kPa = 820 K. Thus, the minimum compressor exit temperature possible is 820 Kelvin.
Learn more about Ideal Gas laws here:
https://brainly.com/question/25290815
#SPJ4
What currency forecasting technique links exchange rates to macroeconomic variables such as money supply and inflation?
Fundamental analysis forecasting technique links exchange rates to
macroeconomic variables.
What is Fundamental analysis?In accounting and finance, fundamental analysis refers to the examination of a company's financial statements, state of affairs, rivals, and markets.Additionally, it takes into account the economy's overall health as well as variables like interest rates, output, earnings, employment, GDP, housing, manufacturing, and management.
A technique for figuring out a stock's true or "fair market" value is fundamental analysis.Fundamental analysts look for stocks that are currently trading for more or less than what they are really worth.A buy recommendation is made for the stock if the fair market value is higher than the current market price, which indicates that it is undervalued.If the fair market value is less than the market price, the stock is regarded as overvalued, and if the stock is held, it may be advised neither to buy nor to sell.Technical analysts, on the other hand, favor analyzing the stock's historical price trends to forecast short-term future trends.
To learn more about Fundamental Analysis, refer
to https://brainly.com/question/26117248
#SPJ4
What is the radius of the sphere gizmos
The radius of a sphere is the distance between the centre point of the sphere to the surface of the sphere.
r = d / 2
A = 4 π r²
r = √ ( A / 4 π )
V = 4 / 3 π r³
r = ∛ ( 3 V / 4 π )
r = Radius of the sphere
d = Diameter of the sphere
A = Surface Area of the sphere
V = Volume of the sphere
A sphere is the 3-dimensional form of a circle. Since the radius of the sphere is a measure of length, its unit is usually meter.
Therefore, the radius of a sphere is the distance between the centre point of the sphere to the surface of the sphere.
To know more about Radius of the sphere
https://brainly.com/question/15858114
#SPJ1
When a ball thrown straight upwards reaches the very top of its path, its acceleration is:_______
When a ball thrown straight upwards reaches the very top of its path, its acceleration is: equal to zero (0)
The fact that the acceleration at the highest point of the ball's trajectory is equal to zero is related to the fact that a transition point is reached in which the acceleration that is equal to gravity goes from being negative when the ball is going up to becoming positive at the instant in which it begins to descend due to the effect of the force of gravity.
What is vertical launch upwards?In physics vertical launch upwards is the motion described by an object that has been launched vertically upwards in which the height and the effect of the earth's gravitational force on the launched object are taken into account.
Learn more about vertical launch at: brainly.com/question/13962796
#SPJ4
Is the average speed of the blood 0.90 m/s , greater than 0.90 m/s , or less than 0.90 m/s ?
The average speed of blood is less than 0.90 m/s.
What is the speed of blood?The blood flows in the body of a person at the speed of less than 0.90 m/s. In miles per hour, the value is 2 which means the blood flows at the rate of 2 miles per hour. We know that blood is very important for the survival of all humans. This blood is a source of transportation of oxygen and waste material in the body like carbondioxide gas. This speed of of less than 0.90 m/s is optimum for the exchange of gases between blood and cell.
So we can conclude that the average speed of blood is less than 0.90 m/s.
Learn more about speed here: https://brainly.com/question/13943409
#SPJ1
nalyze the scatterplot graph.
Which trend does the graph show?
As age increases, weight increases.
As weight decreases, age increases.
As age increases, weight remains the same.
As weight increases, age remains the same.
As we see in the scatterplot graph and the briefing given below the most appropriate option is A-As age increases, weight increases.
Briefing:If you follow the arrow's trajectory, your finger will move to the right, increasing age (on the horizontal axis).
Additionally, as your finger rises, the weight (on the vertical axis) does as well.
Age and weight increase in tandem since both processes are ongoing.
What do scatterplot graphs display?The association between two numerical variables measured for the same individuals is displayed in a scatterplot. One variable's values are displayed on the horizontal axis, and the other variable's values are displayed on the vertical axis. On the graph, each individual in the data is represented by a point.
To know more about Scatterplot graph visit:
https://brainly.com/question/28006653
#SPJ9
The complete question is-
Analyze the scatterplot graph.
Which trend does the graph show?
A-As age increases, weight increases.
B-As weight decreases, age increases.
C-As age increases, weight remains the same.
D-As weight increases, age remains the same.
The drop across a resistor means that there is a change in potential or voltage across the resistor. is there any change in current as it passes through a resistor? explain.
No Change in Current as it passes through a resistor.
Explanation:When there is an IR drop across a resistor, the current flowing through the resistor causes a change in potential or voltage across the resistor. based on Ohm's law
V = RI
where V is the resistance's voltage.
resistance, or R
I = present
R is now known to be constant.
The applied voltage also affects the current for a particular resistance.
Therefore, unless we change the resistance, no change in current is visible when current flows through a resistor.
When the IR drops across the resistor, the potential also drops using Ohm's law.
Thus, the potential energy of the electrons across the resistor drops. But the kinetic energy of the electrons remains the same.
The current is defined by the rate of flow of electrons which remains the same as the kinetic energy did not change.
Hence, the current won't change while passing through the resistor.
To learn more about IR resistors, refer
to https://brainly.com/question/26117248
#SPJ4
The sound intensity at a distance of 20 m from a noisy generator is measured to be 0.26 w/m2. what is the sound intensity at a distance of 27 m from the generator?
0.1111 W/m² is the sound intensity at a distance of 27 m from the generator.
The amount of energy travelling through a unit area in a unit of time perpendicular to the direction of the sound waves is known as the sound intensity. Sound intensity is inversely related to the square of the sound's distance when all other factors are held constant. This is,
I ∝ (1/r²)
I = k/r²
Since k can be the constant of proportionality. k = Ir²
We can write this relation as
I₁ × r₁² = I₂ × r₂²
I₁ = 0.25 W/m²
r₁ = 16 m
I₂ = ?
r₂ = 24 m
0.25 × 16² = I₂ × 24²
I₂ = (0.25 × 16²)/24²
I₂ = 0.1111 W/m²
Learn more about sound intensity here:
https://brainly.com/question/15016641
#SPJ4
Practice using the python interpreter as a calculator. the volume of a sphere with radius r is given by 4/3pir^3. what is the volume of a sphere with radius 5?
Using the python interpreter as a calculator, the volume of the sphere having radius 5 is calculated as 523.5987749999999.
Output:The volume of the sphere is 523.5987749999999
Describe the Python interpreter.The Python interpreter is a virtual machine, which means that it is computer simulation software.
This specific virtual machine is a stack machine; to carry out its tasks, it manipulates a number of stacks (as contrasted with a register machine, which writes to and reads from particular memory locations).
Is Python an interpreter or a compiler?Interpreted terminology
Python is an interpreted language, therefore programmers written in it are translated from their source code into bytecode before being run by the Python virtual machine.
Because Python code does not need to be created and linked like code for other popular compiled languages, such C and C + +, it differs from these languages.
InputGiven that
Pi = 3.14159265
r = 5
V = 4/3 x π x r x 3
V = 523.5987749999999
Print (The volume of the sphere is: 1, V)
To know more about Python interpreter, visit:
https://brainly.com/question/28239031
#SPJ4
What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?
a) 0.0230 kg
b) 2.30 kg
c) 1.15 kg
d) 0.0150 kg
e) 0.575 kg
The correct answer is an option (b) 2.30 kg.
Density is denoted by the symbol 'p'. The density of a substance is directly proportional to its mass and inversely proportional to its volume. It means that with an increase in mass density also increases and with a decrease in volume density also decreases.
The volume of the intravenous glucose solution is v.
v = 2 L
The density of the intravenous glucose solution is p.
p = 1.15 mL
The mass of the intravenous glucose solution is,
1 L = 1000 mL
2 mL = 2000 mL
[tex]Density = \frac{Mass}{ Volume}[/tex]
[tex]p = \frac{m}{v} [/tex]
[tex]1.15 = \frac{m}{2000} [/tex]
m = 1.15 × 2000
m = 2300 g
m = 2.30 kg.
The mass of the intravenous glucose solution is 2.30 kg.
Therefore, the correct answer is an option (b) 2.30 kg.
To know more about density, refer to the below link:
https://brainly.com/question/24650225
#SPJ4
what are two real life examples of vectors
Answer: Navigating by air and by boat is generally done using vectors. Planes are given a vector to travel, and they use their speed to determine how far they need to go before turning or landing.
On mercury, the acceleration due to gravity is 3.59 m/s2. how far would a 21 g rock fall from rest in 7.5 s if the only force acting on it was the gravitational force due to mercury?
The distance traveled by a rock on mercury due to gravity is 100.96.
given that,
acceleration due to gravity, g = 3.59 m/s²
mass of the rock = 21 g
time = 7.5 s
distance traveled =?
using the equation of motion,
s= ut + 1/2 at^2
since u = 0
s = 1/2 x 3.59 x 7.5 x 7.5 = 100.96
Mercury is roughly 0.383 times the size of Earth and just 0.055 as massive, with a mean radius of about 2,440 km and a mass of 3.30 1023 kg. As a result, Mercury is the Solar System's smallest and least massive planet. Mercury has a surface gravity of 3.7 m/s2, which is equal to 0.38 g, although this is due to its high density, which is a solid 5.427 g/cm3, which is higher than Earth's 5.514 g/cm3.
To learn more about gravity please visit-
https://brainly.com/question/4014727
#SPJ4
The density of lead is 11.3 g/cm3. what mass of lead is required to make a 1.00 cm3 fishing sinker?
The mass of lead required to make a 1.00 cm3 fishing sinker is 11.3g.
What is mass?
Mass is a metric used in physics to express inertia, a fundamental characteristic of all matter. A mass of matter's resistance to altering its direction or speed in response to the application of a force is what it essentially is. The change that an applied force produces is smaller the more mass a body has.
Given :
Density of lead = 11.3 g/cm3
Volume of sinker = 1.00 cm3
One of a substance's attributes is density, which is calculated by dividing the mass by the volume. Mathematically:
Density : Mass / volume
therefore after putting the values,
mass= 11.3g
To learn more about density click on the link below:
https://brainly.com/question/18939565
#SPJ4
An object launched at ground level with an initial speed of 50.0 m/s at an angle of 30.0degrees above the horizontal. It strikes a target above the ground 3.0 seconds later.What is the vertical distance of the object from where it was launched to where it lands?
The vertical distance of the object from where it was launched to where it lands is 30.9 meters.
What is projectile?A Projectile is an object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance.
Acceleration=0m/s^2 , t=3 seconds , Vox= 50 cos30 Acceleration=9.8 m/s^2 , t=3 seconds , Voy=50sin3050cos30=x x 50 /50 , 50sin30= y x 50/50 ( x is the base , y is the perpendicular )Del x = ? , Del y = ?Del y = Voy + 1/2 at^2 = 50sin30 x 3 + 1/2 x -9.8x 3^2 = 30.9 mTo know more about Projectile visit:
https://brainly.com/question/11422992?referrer=searchResults
#SPJ9
Please help me with this question soon.
Block A - 19.3 Kg/L
Block B - 0.64 Kg/L
Block C - 0.70 Kg/L
Block D - 0.917 Kg/L
Block E - 3.53 Kg/L
1) Which block has the greatest density?
Block A
Block B
Block C
Block D
Block E
2) Which block has the lowest density?
Block A
Block B
Block C
Block D
Block E
3) Submit your data table and identify the substance each block is made of.
Answer: Ok, ok, I have the same questions and I got them right, here is your answer...
1) Which block has the greatest density?
Answer: Block A
2) Which block has the lowest density?
Answer: Block B
Explanation: For the first question, Block A has the largest whole number, making it have the greatest density.
For the second question, Block B 0.64 has the lowest number behind the decimal in the tenths place is the smallest, making it have the lowest density.
Hope this helps :3
1)We need to identify the block that has the highest mass per unit volume. In this case, it is Block A, which has a density of 19.3 Kg/L. So Block A has greater density. Correct Option is 1.
2) Block B: 0.64 Kg/L block has the lowest density. So Correct Option is 2.
1) Block A with a density of 19.3 Kg/L, it means that for every liter of volume occupied by the block, there is 19.3 kilograms of mass. This indicates that the material in Block A is more dense or more tightly packed compared to the other blocks with lower densities.
2) Block B has the lowest density among the given blocks because it has the smallest value of 0.64 Kg/L. Density is a measure of how much mass is contained within a given volume. A lower density means that there is less mass packed into a given volume, indicating that the material is less dense or less compact
Try to know more about density:
https://brainly.com/question/29775886
#SPJ2
How many photons at 660 nm must be absorbed to melt 5.0 x 10^2 g of ice?
The total photons at 660nm that are needed to be absorbed are 5.533 x 10²¹ in order to melt the ice.
What is the Planck's equation?Planck's equation is used to determine that the energy (E) of a photon is equal to hv = hc/λ, where this v is stated as the frequency of the electromagnetic radiation and λ as its wavelength.
Wavelength = 660nm = 6.60 x 10^-7 m
First, we find out the energy that is required to melt 5.0 x 10^2 grams of ice. This is given by:
Energy = mass multiplied by latent heat of fusion
Energy = 5.0 x 10^2g x 334 J/g
Energy = 167 x 10^3 J
So, we now have that to melt 5.0 x 10^2 g of ice, we need 334J of energy
Next, we can use Planck's equation which is:
Energy = (number of photons multiplied by Planck's constant x speed of light) / wavelength
167 x 10^3 J = [n * 6.64 x 10⁻³⁴ * 3 x 10⁸ ]/ 6.60 x 10^-7
n = 5.533 x 10²¹
5.533 x 10²¹ photons need to be absorbed by the ice in order to melt.
To know more about Planck's equation, visit:
https://brainly.com/question/5528489
#SPJ4
