A saucepan is used to heat 1 litre (1kg) of water. If 180,000) of heat are added and the initial temperature was 10 °C. What temperature will it reach?

Answer:

White

Explanation:

Red comes from the lowest energy range of and blue from the highest.

Answer:What is the acceleration of a car that moves from rest to 15.0 m/s in 10.0 s? Vi=0, vf= 15.0 m/s,t=10.0s, a=? a= vf =vi/tA=15.0m/s-0m/s/10.0s = 15.0s/10.0s m/s*1/s =1.50 m/s^2 11.

Explanation:

This graph (EQ) tell us about humans compared to other animals is B. Humans have a brain mass that is unusually large for an animal of our body mass.

The encephalization quotient (EQ) is a comparative tool that is used to assess brain development and to predict intelligence or abilities in animals. It compares the brain mass of a particular animal with that of other animals of the same weight. The higher the EQ of an animal, the greater the degree to which its brain has evolved. Humans, who have the most developed brains, have an EQ of 7.5, which is significantly higher than other primates and most other animals.

Humans are the only animals with an EQ of 7.5, indicating that their brains are unusually large for their body weight. While elephants and dolphins have larger brains than humans, their brains are not as developed or complex as human brains, and their EQs are lower. Hence, the graph shows that humans have a brain mass that is unusually large for an animal of our body mass. So the correct option is B. Humans have a brain mass that is unusually large for an animal of our bodymass.

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The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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D. The specific heat of a gas can be measured at constant pressure.

By definition, the specific heat capacity of a substance is the heat capacity of a sample of the substance divided by its mass, also known as massic heat capacity.

Water has a high specific heat, which means that it takes more energy to raise the temperature of water than other substances.

For gaseous substances, their specific heats can be measured at constant pressure.

Using the above as a guide, we have the following:

The accurate statement about specific heat is (d)

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The velocity equation is \(v_{final} =v_{initial} +at\\\)

Known facts:

Plug into equation known quantities:

   \(v_{final} = (-3.04) * 3.83 = -11.6432m/s\)

Thus the final velocity is -11.6432m/s

Hope that helps!

Answer:

it is the protons

Explanation:

the protons is positively charged and the number can tell you the element in the periodic table

The resultant momentum of the object is 13 meters per second.

A moving body's amount of motion is referred to as momentum. In general, it is more difficult to stop a moving object the more momentum it has. For this reason, the term is frequently used in a metaphorical sense, as in the sports team example.

It indicates that the team is having success (usually a winning streak) and is growing as a result. The other teams will find it more difficult to prevent the team from picking up steam.

Given that an object has an x–the momentum of 8.5 kilograms meters/second and a y–the momentum of 9.8 kilograms ·meters/second.

The resultant momentum will be calculated as:-

R = √ ( 9.8² + 8.5²)

R = √168.29

R = 13 meters per second

Therefore, the resultant momentum of the object will be 13 meters per second.

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Answer:

The index of refraction

The index of refraction tells us how much slower or faster light travels from one medium to another.

The formula to find the refractive index of a substance is the following:

\(n=\dfrac{c}{v}\)

This makes the index of refraction defined as the ratio of:

Answer:

index of refraction

Explanation:

Answer:

I think C like my friend upove

Explanation:

Answer:

s = 50.4 m

Hence, the point C is 50.4 m towards east from point B

Explanation:

Since, the motorcyclist travels at a constant speed in straight line towards east after point B. Therefore, we can use the following equation in this case:

s = vt

where,

s = distance covered = position of point C = ?

v = uniform speed of motorcyclist = 18 m/s

t = time interval = 2.8 s

Therefore,

s = (18 m/s)(2.8 s)

s = 50.4 m

Hence, the point C is 50.4 m towards east from point B

An irreversible reaction is a reaction that tends to completion. When a strong acid added to water, the reaction is irreversible.

In chemistry, a reaction may be reversible or irreversible. In a reversible reaction, the reaction could move forward or backwards. An irreversible reaction only tends towards completion. It doesn't goes in the reverse direction.

When a weak acid or base is added to water, the reaction is reversible because the substance does not ionize to a large extent in water and the equilibrium position may lie towards the far left. However, a strong acid or base achieves 100% ionization in water hence the reaction is irreversible.

Therefore, when a strong acid added to water, the reaction is irreversible.

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Answer:

1. strong acid added to water

2. The dissociation constant for hydrochloric acid is greater than the dissociation constant for acetic acid.

3. HA, HC, HB

4. decreasing the concentration of OH– ions

HOPE THIS HELPS

Answer:

A

Explanation:

A roller coaster accelerates at 8.75 m/s² from rest to a final velocity of 70 m/s it takes 8 sec to speed up.

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Answer:

Dispalcement(s)=v*t

=8.1*6

=48.6m

The system in which less refrigerant enters the cylinder for each compression cycle, requiring more horsepower for each BTU of cooling, is the Vapor Compression Refrigeration System.

The Vapor Compression Refrigeration System is a common refrigeration system used in various applications such as air conditioning and refrigeration units. In this system, the refrigerant undergoes a compression cycle to transfer heat and provide cooling. The amount of refrigerant entering the cylinder during each compression cycle is less in this system compared to other systems.

As a result, more horsepower is needed to compress the smaller amount of refrigerant to achieve the desired cooling effect. This higher power requirement per unit of cooling (BTU) makes the system less efficient and less energy-saving. Therefore, the Vapor Compression Refrigeration System requires more horsepower for each BTU of cooling.

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The length of a simple pendulum with a period on Earth of 6.0 seconds is nearly 8.95 meters.

A simple pendulum can be described as a device where its point mass is attached to a light inextensible string and suspended from a fixed support. The vertical line passing through the fixed support is the mean position of a simple pendulum.

To calculate the length, we can use the formula for the period of a simple pendulum:

T = 2π√(L/g), where T is the period, L is the length, and g is the acceleration due to gravity (approximately 9.81 m/s² on Earth).

First, we'll rearrange the formula to solve for L:
L = (T² * g) / (4π²)

Now, plug in the given period (T = 6.0 seconds) and the value of g (9.81 m/s²):
L = (6.0² * 9.81) / (4 * π²)

Calculate the result:
L ≈ 8.95 meters

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Answer:

800N is the answer

Explanation:

hope it helps

The force between the objects is 200 N and when the distance between the objects is halved then the force between them will be equal to 800 N.

A force in physics is an input that has the power to change an object's motion. A mass-containing object's velocity can vary, or accelerate, as a result of a force. Intuitively, a push or a pull can also be used to describe forces.

Being such a vector quantity, a force does have magnitude and direction. The SI unit metric newton is used to measure it (N). The letter F stands for force.

According to Newton's second law's original formulation, an object's net force is equal to the speed that its momentum is changing over time.

As per the given information in the question,

Force, F = 200 N

F1 = G × m₁m₂/ r²

The final force F' = G × m₁m₂/ (r/2)²

= 4G × m₁m₂/ r²

= 4F

So, when the distance between objects is halved, then the force between them increases to 4 times.

So, the force will be,

4F = 4 × 200

= 800 N.

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The density of the SF₆ gas at the given pressure and temperature is 2.96 g/l.

The given parameters:

The molecular mass of the SF₆ gas is calculated as follows;

M of SF₆ = 32 + (6 x 19) = 146 g/mol

The density of the SF₆ gas is calculated by applying ideal gas law as follows;

\(PV = nRT\\\\PV = \frac{m}{M} RT\\\\PM = \frac{m}{V} RT\\\\PM = \rho RT\\\\\rho = \frac{PM}{RT}\)

where;

\(\rho = \frac{0.5 \times 146}{0.0821 \times 300} \\\\\rho = 2.96 \ g/l\)

Thus, the density of the SF₆ gas at the given pressure and temperature is 2.96 g/l.

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Answer:

16

Explanation:

it goes up 4 each dash

Answer:

16

Explanation:

a) The free body diagram (FBD) for the mass would include the force of gravity (Fg) acting downward , the tension force (T) acting at an angle from the vertical, and the centripetal force (Fc) acting toward the center of the circle.

b) the tension on the rope is T = 215.5 N. c) The angle that the rope makes with the vertical is 61.4°. A conic pendulum is a type of pendulum that rotates in a horizontal circle while hanging from a fixed point.

The force that causes the mass to rotate is the tension in the rope. In this case, the mass of the pendulum is 12 kg, the length of the rope is 2.0 m, and the period of rotation is 2.1 s.


The tension on the rope can be found using the equation for centripetal force:

Fc = (m*v^2)/r

Where m is the mass, v is the velocity, and r is the radius of the circle. The velocity can be found using the equation v = 2πr/T, where T is the period of the rotation. Substituting the values given in the question:

v = (2π*2.0)/2.1 = 5.99 m/s

Fc = (12*5.99^2)/2.0 = 215.5 N

The tension force is equal to the centripetal force, so T = 215.5 N.

c) The angle that the rope makes with the vertical can be found using the equation tanθ = Fc/Fg, where Fg is the force of gravity. The force of gravity can be found using the equation Fg = mg, where g is the acceleration due to gravity (9.8 m/s^2):

Fg = (12*9.8) = 117.6 N

tanθ = 215.5/117.6 = 1.83

θ = tan^-1(1.83) = 61.4°

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Answer:

a. 15,000J

b. .76m

Explanation:

KE = (1/2)m*v²

KE = .5*1000kg*30m/s

KE = 15000J

PE = m*g*h

7500J = 1000kg*9.81m/s²*h

7500J = 9810*h

h = .76m

Answer:

C

Explanation:

Density of Silver is 10.5 g/cm3 and density for olive oil is 0.92 g/cm3 the denser 1 (look at the amount for density the 1 that have larger amount means is denser )will sink.

A multicomponent distillation is a technique for separating different components from a complex mixture. For the separation of five components, two fractionators are required. The fractionators are used for the separation of a complex mixture into its components using the difference in boiling points.

The boiling points of components should be considerably different for efficient separation. In multicomponent distillation, several fractionators are used for separation. Each fractionator consists of two sections; the stripping section and the rectifying section.

The mixture is fed into the stripping section where the lightest component is vaporized. The vapors then travel to the rectifying section where they condense on the trays. The remaining liquid mixture travels to the next fractionator where the next component is separated, and so on until all the components have been separated.

A distillation column is an essential component in the chemical processing industry. It separates different components of a complex mixture by utilizing the difference in boiling points. It is also called a fractionator. It is widely used in the petroleum industry, chemical industry, and pharmaceutical industry. In a multicomponent distillation, several fractionators are used to separate a complex mixture into its components.

The number of fractionators required to separate the components depends on the complexity of the mixture. For example, if the mixture has five components, then two fractionators are required for separation. Each fractionator consists of two sections; the stripping section and the rectifying section. In the stripping section, the mixture is fed into the column, and the lightest component is vaporized.

The vapors then travel to the rectifying section where they condense on the trays. The remaining liquid mixture travels to the next fractionator where the next component is separated, and so on until all the components have been separated. This process requires careful design to achieve the desired separation.

A multicomponent distillation is an essential process used to separate different components of a complex mixture. It is widely used in the chemical processing industry to separate components with different boiling points. Two fractionators are required to separate a mixture with five components. The design of a multicomponent distillation column is a complex process that requires careful consideration of many factors.

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Answer:

The answer is D.

Explanation:

Answer:

B

Explanation:

Given: on = 10⁵ 1/M*s, koff = 10⁴ 1/sWe have to calculate the value of Kd (in M).Kd is defined as the dissociation constant of the complex and is given by the ratio of the rate constants for complex formation and dissociation.

We must determine Kd's (in M) value.The complex's dissociation constant, or Kd, is determined by the ratio of the rate constants for complex creation to that of complex dissociation.

Kd = koff / kon

The value of kon is given as,on = 10⁵ 1/M*skon is the association rate constant

Therefore, the dissociation constant Kd can be calculated askoff / konKd = koff / kon= 10⁴ 1/s / 10⁵ 1/M*s= 10⁻¹ MAnswer: The value of Kd (in M) is 10⁻¹.

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The dissociation constant (Kd) is calculated as the ratio of the off-rate to the on-rate of a reaction. Using the given values, we find that Kd = koff / kon = 10^4 / 10^5 = 0.1 M. Therefore, the dissociation constant is 0.1 M.

In chemistry, the dissociation constant, Kd, is a specific type of equilibrium constant that measures the propensity of a larger object to separate, or dissociate, into smaller components. The Kd or dissociation constant is typically defined as the ratio of the off-rate to the on-rate of a reaction, represented mathematically as Kd = koff / kon.

In this specific scenario, the on-rate (kon) is given as 10^5 1/(M*s) and the off-rate (koff) as 10^4 1/s. Using the given values for kon and koff, we can calculate the dissociation constant (Kd) as follows: Kd = koff / kon = 10^4 / 10^5 = 0.1 M.

Therefore, the dissociation constant (Kd) in this case is 0.1 M.

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A constant voltage of 77 volts is put across a resistance that is increasing at a rate of 0.202 ohms per second when the resistance is 55 ohms. The current is changing at a rate of 0.0051amps per sec

Given voltage (V) = 77v

Resistance (R) = 55ohms

The relation among voltage (V), resistance (R) and current (I) is given as

I =V/R

The increasing rate of resistance is = dR/dt = 0.2ohms per second

By derivating the current to get rate of change in current

dI/dt = Vxd/dt(1/R)    [ Because V is a constant ]

dI/dt = V x d/dt(R −1)

dI/dt = V(-1/R^2 x dR/dt) = 77x (-1/55x55) x 0.202 = -0.005amp per second

Hence the current is changing at a rate of 0.0051amps per sec

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The index of refraction that halves the wavelength that light has in a vacuum is 2.00. Therefore, the correct option is (d) 2.00.

When light passes from one medium to another, it changes its velocity, and thus its wavelength. The index of refraction is a measure of how much light is bent when passing through a medium and can be calculated using Snell's Law:n1sin θ1=n2sin θ2where n1 and n2 are the indices of refraction of the two media, and θ1 and θ2 are the angles that the light makes with the normal line in the first and second media, respectively.

For a given angle of incidence, we can see that the index of refraction is directly proportional to the sine of the angle of refraction, which means that as the angle of refraction increases, so does the index of refraction. Now, let's assume that light is passing from vacuum (with index of refraction n1=1) to a medium with an unknown index of refraction n2.

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