The formula for calculating density, D, is D=MV, where M represents mass and V represents volume.

For liquids, volume is often given in cubic centimeters (cc), which is the same as cm 3. If the density of an unknown liquid is 1.6 g/cc, what is the mass of 800 cc of the unknown liquid in grams (g)?

The time taken for the object to reach the impact velocity is 11.87 seconds.

The time taken for the object to reach the impact velocity is calculated as follows;

v = u + gt

where;

116.34 = 0 + 9.8t

t = 116.34/9.8

t = 11.87 seconds

Thus, the time taken for the object to reach the impact velocity is 11.87 seconds.

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Total Cost is =  $107,380 if The farm is 340 acres and had corn planted  add fertilizer to the soil before you plant this years' crop.

A fertiliser is a natural or artificial substance containing chemical elements (such as Nitrogen (N), Phosphorus (P) and Potassium (K)) that improve growth and productiveness of plants. Some synonyms include the terms "enrichment" or "plant nutrient".

Without fertilizers, nature struggles to replenish the nutrients in the soil. When crops are harvested, important nutrients are removed from the soil, because they follow the crop and end up at the dinner table. If the soil is not replenished with nutrients through fertilizing, crop yields will deteriorate over time.

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The stopping time will be 0.13 second required in order to safely stop a CEV .

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

The average force acting on CEV is = 426000 N.

Mass of the  CEV is = 7250 kg.

Initial speed of the CEV  is =  7.65 m/s

Hence, deceleration of the CEV is = ( 426000 N ÷ 7250 kg) = 58.75 m/s²

Hence, required stopping time = 7.65 m/s ÷ 58.75 m/s² = 0.13 second.

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The value of resistor R that gives the circuit in the figure a time constant of 22 μs is 220 Ω.

The circuit that is in the figure is shown below:Given that time constant (RC) = 22 μs. To find the value of resistor R, we need to use the formula for the time constant:

RC = τ, where R is the resistance and C is the capacitance of the circuit.

Rearranging the above formula, we get:R = τ / C

Where τ is the time constant and C is the capacitance of the circuit.

From the figure, the capacitance is given as 0.1 μF

.Substituting the values of τ and C in the above formula, we get:

R = (22 × 10⁻⁶ s) / (0.1 × 10⁻⁶ F)

R = 220 Ω

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(d) 50N/C

The magnitude of the electric field at point 'P' is 50N/C.

It is derived from the basic concepts of Electrostatics. Coulomb's Law is the basis of relations in Electrostatics. It resembles Newton's Law of Gravitation.

Using the relation between Electric force, charge, and Electric field:

                                          F = qE

                                     200 = (4)E

                                          E = 50N/C  

It is widely used in the calculation of Electric Force and Electric Field. The S.I. Unit of the Electric Force is Newton. The S.I. Unit of the Electric Field is N/C. The S.I. Unit of charge is Coulomb.

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The original source of light energy emitted by a protostar is due to the acceleration of charged particles, most charged particles are p-p (proton-proton )chain. Protostars generate most of their energy from gravitational contraction.

What is a protostar?

A Protostar is a newly formed young star that gathers its mass from parent molecular cloud. Protostar is formed by contraction of gas mass which represents an early stage in the formation of a star.

It is basically a cloud of hydrogen gas and dust in space which believed to develop into a star by gravitational force. The process of evolving a protostar takes up to 100,000 to 10 million years. This stage is known as stellar evolution.

The another word for protostar is neutron-star.

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The molar mass of the gas with specified density and pressure at certain temperature is calculated to be 64.02 mol⁻¹.

Given,

ρ = 2.09 g/l

T = 100° C

P = 1 atm

Molar mass (Mm) can be written as the ratio of given mass of the gas (m) and number of moles (n) it contains.

Mm = m / n ---(1)

Density can be written as the ratio of mass and volume.

ρ = m / V ---(2)

Placing (1) and (2) in ideal gas law equation, we have

P V = n R T

"P V = m / Mm × R T"

Making Mm as subject, we have,

Mm = m / V × R T/P

Convert the temperature of the gas from degrees Celsius to Kelvin then substituting the values,

Mm = m / V × R T/P

Mm = 2.09 g/l × 0.0821 atm L/mol K× (100 + 273.15)K × 1/ 1 atm = 64.02 mol⁻¹

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To lower a 50 kg object from a roof as slowly as possible without breaking the cord, a force less than or equal to the breaking strength of the cord needs to be applied. By gradually applying a force of 200 N or less, the object can be safely lowered without exceeding the cord's breaking strength.

The cord's breaking strength of 200 N sets the limit for the maximum force that can be applied. To ensure the object is lowered slowly, the force must be controlled and gradually adjusted. This can be achieved by using a pulley system or a mechanical device that allows for controlled descent. By applying a force equal to or slightly below the breaking strength of the cord, the weight of the object can be balanced and controlled, allowing for a slow and safe descent.

It is important to note that safety should be the top priority when lowering objects from heights. Using appropriate equipment, ensuring proper attachment, and following safety guidelines are crucial to prevent accidents and ensure a controlled descent.

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When the alcohol thermometer is placed in 20 degree Celsius water, the thermometer would record option B: 20 degree Celsius.

An alcohol thermometer will read 20 degrees Celsius when submerged in water that is 20 degrees Celsius. From -115°C to 78.5°C2, alcohol thermometers are used to measure temperatures. Above this point, they are ineffective for temperature measurement.

An instrument used to measure temperature is called a thermometer. The temperature is around 0 degrees Celsius, or 32 degrees Fahrenheit, according to this thermometer encased in ice. The temperature would be around 274 degrees if this thermometer used the scientific kelvin scale.

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Answer:

gravity would pull the ball towards the center of the earth

Answer:

Hope it helps

Explanation:

This is because the force of earth's gravitational field is always directed downwards (towards the center of the earth. ... When the ball is thrown up, it is going against the earth's gravitational field and so, the earth's gravitational force pulls it back down, accelerating it downwards.

Answer:

1/5 km/min

Explanation:

the formula for velocity is distance/time

so if i plug in the distance and time i get 5/25 or 1/5

Hope this helps!

Answer:

the bowling ball or the frisbee

Explanation:

I think it's the bowling ball or the frisbee. I am not really sure, so if you get it wrong I am extremely sorry!!

To calculate the mass of water that needs to be removed from the cellar, we need to consider the change in humidity.

First, we need to determine the initial and final absolute humidity (AH) values. Absolute humidity is the mass of water vapor per unit volume of air.

Given:

Floor space = 88.3 m²

Ceiling height = 2.79 m

Initial humidity = 97.0%

Final humidity = 31.2%

AH = (absolute humidity * saturation vapor pressure) / (temperature + 273.15)

The saturation vapor pressure at 20°C is approximately 2.34 kPa.

Initial AH = (0.97 * 2.34) / (20 + 273.15) = 0.2693 kPa

Final AH = (0.312 * 2.34) / (20 + 273.15) = 0.0861 kPa

Volume = floor space * ceiling height = 88.3 m² * 2.79 m = 246.057 m³

Initial mass of water vapor = Initial AH * Volume = 0.2693 kPa * 246.057 m³ = 66.357 kg

Final mass of water vapor = Final AH * Volume = 0.0861 kPa * 246.057 m³ = 21.194 kg

Mass of water to be removed = Initial mass - Final mass = 66.357 kg - 21.194 kg = 45.163 kg.

In order to drop the humidity from 97.0% to 31.2%, approximately 45.163 kg of water needs to be removed from the cellar.

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The machine used to separate the primary visible components of blood, such as plasma and red blood cells, is called a centrifuge.

A centrifuge is a laboratory machine that uses centrifugal force to separate various components of a liquid. In the case of blood, the centrifuge spins the blood around at high speeds, causing the denser components, such as red blood cells, to settle to the bottom of the container, while the lighter components, such as plasma, remain at the top. This separation allows for further analysis or processing of the different components of blood.

Therefore, if you need to separate blood into its primary visible components of plasma and red blood cells, a centrifuge is the machine you would use.

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The first choice will successfully show that things with differing temperatures eventually attain an equilibrium temperature in a closed system.

A substance's or an object's temperature is a measurement of how hot or cold it is. It is a characteristic of matter that has to do with the typical kinetic energy of the atoms or molecules that make up the thing or material. Normally, temperatures are expressed in either degrees Celsius (°C) or degrees Fahrenheit (°F).

The student takes measurements of the temperature in a styrofoam cooler and a cup of hot coffee. The student then adds the coffee to the cooler, closes it, and measures each the following morning. In this experiment, two objects with various temperatures are placed in a sealed environment. The styrofoam cooler's insulating quality will allow the heat transfer to proceed gradually until an equilibrium temperature is attained. Once more measuring the temperatures demonstrates that both objects have attained the same temperature.

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An accelerating universe is currently the most accepted in light of the discovery of dark energy.

A hypothesized energy known as "dark energy" acts in opposition to gravity by exerting a repellent, negative pressure. It has been proposed to explain the observable characteristics of far-off type Ia supernovae, which reveal the universe is expanding at a faster rate than usual.

Saul Perlmutter, Brian Schmidt, and Adam Riess are the recipients of the 2011 Nobel Prize in Physics. They made the stunning conclusion that the universe's expansion is speeding up as a result of their observations of far-off stars exploding.

The distance measurements utilizing type Ia supernovae (SN Ia) for the galaxies at high redshift provide the most direct and compelling evidence for the expanding cosmos powered by dark energy.

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Heating of gas leads to change in kinetic energy of the gas.

As the temperature of the system increases, the molecules in it begin to move faster, and the speed of the particles is directly proportional to the kinetic energy.

Kinetic energy is the energy possessed by the gaseous particles while they are in motion.

Mathematically, KE = (1/2)mv^2,

where KE is kinetic energy, m is mass, and v is velocity.

When the temperature of a gas increases but the pressure remains the same, the volume of the gas increases, which means that the molecules must cover more space in the same amount of time by moving faster.

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Answer:

D. they produce more useful design solutions when they include qualitative values

Explanation:

\(.\)

Answer: they result in better design solutions

Explanation:

Answer:

The last one

Explanation:

The cat goes from the tree branch (top) to the ground (bottom)

The missing neutrinos from the sun had merely tranformed into muon and tau neutrinos  escaped detection.Hardly interacting with other matter,neutrinos comes in three different types electron,muon,and tau.

Hence option (b) turning into different type of neutrino in a neutrino oscillation is correct

Disclaimer:The question given on the portal is incomplete .Here is the complete question .

Question :Astronomers and physicists now believe they know what is happening to the missing neutrinos from the Sun (the neutrinos that our theories say should be emerging from the Sun, but our experiments in that underground mine could not find). These neutrinos are:

a)not being produced by the Sun because our star's nuclear fusion period has ended

b)turning into a different type of neutrino in a neutrino oscillation

c)being converted to antimatter in the core of the Sun and being destroyed as they hit matter

d)changing course before they reach the Earth as they hit other neutrinos in space

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We can use the formula of the capacitance

where C is the capacitance, Q is the charge and V is the voltage.

In our case

Q=480 C

V= 110 V

The value of the capacitor is 4.36 F

ANSWER B) 4.36F

If two objects experience forces of the same magnitude, the object with the smaller mass will have a higher acceleration.

The acceleration of an object is directly proportional to the force acting on it, and inversely proportional to its mass. According to Newton's Second Law of Motion, the acceleration of an object is directly proportional to the force acting on it, and inversely proportional to its mass. Mathematically, this can be expressed as F = ma, where F is the force acting on the object, m is its mass, and a is its acceleration. Therefore, if the forces exerted on two objects are the same, the object with the smaller mass will experience a greater acceleration, and vice versa.

In the given scenario, the force exerted on the car is ten times greater than the force exerted on the truck. However, the magnitude of the acceleration of the car is equal to the magnitude of the acceleration of the truck. This implies that the mass of the car must be ten times smaller than the mass of the truck, as the forces acting on both the vehicles are the same.

Hence, from the above explanation, it can be concluded that if two objects experience forces of the same magnitude, the object with the smaller mass will have a higher acceleration. This relationship between force, mass, and acceleration is fundamental to understanding the motion of objects and is applicable in various real-life scenarios, such as in the design and analysis of vehicles and machinery.

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Specific heat capacity of solid magnesium is 0.9556 J/g C.

What is specific heat capacity?

When a material's temperature rises by 1 K (or 1 °C), or when its mass increases by 1 kg, the specific heat capacity is defined as the amount of heat (J) absorbed per unit mass (kg). This measurement is expressed as J/(kg K) or J/(kg °C).

According to the given question:

C = Q/m.T

T = T2 - T1 = 38.9 - 24.5 = 14.4 C

C = 11.7/(161 x 14.4) = 0.9556 J/g C

Specific heat capacity of solid magnesium is 0.9556 J/g C.

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Answer:

20

Explanation:

Speed is 10 m/s

Kinetic energy is 1000joules

Mass is ?

Therefore the mass can be calculated as follows

K.E= 1/2mv^2

1000= 1/2 × m × 10^2

1000= 1/2 × m × 100

1000= 100m/2

2000= 100m

m= 2000/100

m= 20

Hence the mass is 20kg

The time taken by the person to hear the sound of the gun is 22 seconds.

To determine how long it will take for the person who fired the gun to hear the echo, we need to consider the round trip distance the sound has to travel (to the mountain and back) and the speed at which sound travels.

The round trip distance is 3,681 m (to the mountain) + 3,681 m (back to the person) = 7,362 m. The speed of sound is 340 m/s.

To find the time, we can use the formula: time = distance/speed.

So, time = 7,362 m / 340 m/s ≈ 21.65 s.

Rounded to the nearest whole number, it will take approximately 22 seconds for the person who fired the gun to hear the echo.

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Both Type Ia and Type II supernovae are important astronomical events that provide us with valuable information about the life cycle of stars and the formation of the universe.

Type Ia and Type II supernovae are two different types of supernovae that are caused by different types of stars. Type Ia supernovae are caused by white dwarf stars, which are the remnants of stars that have exhausted all of their nuclear fuel and have collapsed to a very small size. These stars are typically in a binary system with another star, and they can accrete matter from their companion star. When a white dwarf reaches a certain mass, it can undergo a runaway nuclear reaction that causes it to explode as a supernova.
On the other hand, Type II supernovae are caused by much more massive stars, which have exhausted their nuclear fuel and can no longer support their own weight. These stars undergo a series of complex nuclear reactions that result in the production of heavier elements, and eventually, they collapse under their own gravity and explode as supernovae.
Overall, both Type Ia and Type II supernovae are important astronomical events that provide us with valuable information about the life cycle of stars and the formation of the universe. By studying these explosions and their remnants, astronomers can learn more about the composition and evolution of the universe, as well as the origins of the chemical elements that make up our world.

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(a) The tangential speed of the discus at the release is 15 m/s.

(b) The centripetal acceleration of the discus is 225 m/s².

(c) The centripetal force on the discus is 360 N.

The given parameters;

The tangential speed of the discus at the release is calculated as follows;

\(v = \omega r\\\\v = 15 \ rad/s \ \times 1 \ m\\\\v = 15 \ m/s\)

The centripetal acceleration of the discus is calculated as follows;

\(a_c = \frac{v^2}{r} \\\\a_c = \frac{15^2}{1} \\\\a _c = 225 \ m/s^2\)

The centripetal force on the discus is calculated as follows;

\(F_c = ma_c\\\\F_c = 1.6 \times 225\\\\F_c = 360 \ N\)

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