TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

What type of data do scientists use to predict tornadoes? A.moisture levels and temperature B.cloud cover and wind flow C.cloud cover and moisture levels D.wind flow and temperature


I just took the quiz and the answer is D.)wind flow and temperature


Related Questions

Posted in Physics

What happens when the temperature of an object increases? A. The particles move closer together. B. The particles move faster. C. The number of particles increases. D. The particles stop moving.

I believe the correct answer from the choices listed above is option B. When the temperature of an object increases, the particles move faster since kinetic energy of the molecules increases. Hope this answers the question. Have a nice day.

Posted in Physics

In 2004 astronomers reported the discovery of a large Jupiter-sized planet orbiting very close to the star HD 179949 (hence the term "hot Jupiter"). The orbit was just 19 the distance of Mercury from our sun, and it takes the planet only 3.09 days to make one orbit (assumed to be circular). What is the mass of the star? Express your answer (a)in kilograms and (b)as a multiple of our sun's mass.

  I'll tell you how to do it but you must crunch the numbers. 

Use Kepler's 3rd Law 

T^2 = k R^3 

where k = 4(pi)^2/ GM 
G =gravitational constant = 6.67300 × 10-11 m3 kg-1 s-2 
M = mass of this new planet 
pi = 3.14159265 
T =3.09 days = 266976 seconds 
R = (579,000,000km)/9 = 64333333.3 km 

a) 
Solve Kepler's 3rd Law for M. Your answer will be in kg 


b) 
mass of the sun = 1.98892 × 10^30 kilograms 
Form the ratio 
M(planet)/M(sun) 

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

If two carts collide, what type of collision will conserve both momentum and kinetic energy? a. head on b. perfectly inelastic c. none d. perfectly elastic

The appropriate answer is d. perfectly elastic. When a perfectly elastic collision occurs both momentum and kinetic energy are preserved. Momentum is the mass of an object times its velocity while kinetic energy is the energy that a moving object has due to its motion. In an elastic collision kinetic energy would be converted to some other form of energy. 

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

Crystals can have _____ bonds between their atoms. ionic covalent metallic all types of

Answer;

All types of

Crystals can have all types of  bonds between their atoms.

Explanation;

  • Crystals are solid materials which contains atoms, molecules or ions that are arranged in a complex structure forming a crystal lattice.
  • Crystals may have all types of bonds, these includes; ionic bonds, formed as a result of transfer between a metallic bond and a non-metal atom, Covalent bond, formed as a result of sharing electrons between non metal atoms, hydrogen bonds, metallic bonds Van der Waals bonds, etc.

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

Which best compares AC and DC? AC flows in one direction, and DC repeatedly switches direction. DC flows in one direction, and AC repeatedly switches direction AC is used only in generators, and DC is used only in motors DC is used only in generators, and AC is used only in motors

Answer: DC flows in one direction, and AC repeatedly switches direction

Explanation:

DC stands for direct current.

AC stands for alternating current.

When current flows only in single direction, it is known as direct current. When current changes direction i.e. it alternates direction, it is known as alternating current.

There are both AC generators and DC generators.

AC generators supply power to home appliances and small motors. DC generators are used to power large electric motors.

Posted in Physics

A substance made of one or more atoms of a single type is a ?

An element is a substance made up of only one type of atom.

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

When would the temperature and thermal energy of an object differ?

The difference between temperature and thermal energy is that temperature measures the average kinetic speed of molecule and thermal energy is the total kinetic energy of all particles in a given substance.

Posted in Physics

What causes the electric charges to flow from one end of the battery to the other? a balance in electric potential a balance in resistance a difference in electric potential a difference in resistance

The answer is difference in eletric potential. If there are 2 groups of electric potential and they are connected, the difference in potential we cause particles with charge to flow until the potential is equal. Resistance only determines rate of flow but doesnt initialy cause the flow.

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

Which is the best reason for using a temperature probe instead of a thermometer? to make measurements in degrees Celsius to make measurements in degrees Fahrenheit to record continuous measurements over several minutes to record individual measurements several times in a day

Answer;

to record continuous measurements over several minutes

Explanation;

  • A temperature probe is a type of temperature sensor that is used to measure temperature changes.
  • Temperature probes are used in almost any industries with most common being, medical, food, communication and motor spot among others.
  • Temperature probes are advantageous and more preferred to thermometers as they record continuous measurements over several minutes. Other advantages include, greater sensitivity, could link to a computer for data analysis, reduces instrument reading error, etc.

Posted in Physics

A gas has an initial volume of 212 cm^3 at a temperature of 293 K and a pressure of 0.98 atm. What is the final pressure of the gas if the volume decreases to 196 cm^3 and the temperature of the gas increases to 308 K? a. 0.86 atm b. 0.95 atm c. 1.0 atm d. 1.1 atm

For this we use general equation for gases. Our variables represent:

p- pressure
v-volume
t- temperature

P1V1/T1 = P2V2/T2

in this equation we know:
P1,V1 and T1, T2 and V2. 
We have one equation and 1 unknown variable.

P2 = T2P1V1/T1V2 = 1.1atm

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

Which of the following is the most appropriate unit to describe the rate at which water flows out through a standard household faucet? Minutes per gallon, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes. Gallons per minute, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes. Minutes per gallon, because the independent quantity is time in minutes and dependent quantity is volume of water in gallons. Gallons per minute, because the independent quantity is time in minutes and dependent quantity is volume of water in gallons.

Answer:

Gallons per minute, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes.

Explanation:

As we know that gallons is the unit of volume which is used in US to measure volume of gas as well as liquids while time is measured in minutes.

Now we know that if we need to find the volume flow rate then in that case the measurement is done to find the amount of fluid flow per unit of time

so here since volume flow is an independent variable which do not depends on any other parameter while time is a dependent variable here which is given as

flow \: rate = \frac{dV}{dt}

so correct answer will be

Gallons per minute, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes.

Posted in Physics

1. In the circuit shown below, with each bulb holding a resistance of 100 ohms, how many amps of current are flowing? Express your number as a decimal. (See Figure) 2. Protons have positive charge, neutrons have negative charge, and electrons have no charge. A. True B. False 3. A complete electric circuit includes a voltage source, current, wires, and something to _________ the flow of current.

These are 3 questions and 3 answers.

Question 1.

Answer: I = 0.01 A

Explanation:

a) Data:

i) Type of circuit: series

ii) R₁ = 100 Ω

ii) R₂ = 100 Ω

iii) V = 2 V

iv) I = ?

b) Formulas

i) Equivalent resistance, R = R₁ + R₂

ii) Ohm's law, V = IR

c) Solution

i) R = 100Ω + 100Ω = 200Ω

ii) I = V / R = 2 V / 200Ω = 0.01 A

Question 2)

Answer: False.

Explanation:

The nuclear model of the atom states that the atom is neutral, and consists of a nucleus, which holds the protons and the neutrons, and the electrons which are around the nucleous (in regions called orbintals).

The electrons are negatively charged and the protons are positively charged.

The magnitudes of the charges of both electrons and protons are equal.

Therefore, for the atom be neutral, the neutrons cannot have charge.

Question 3.

Answer: oppose (or resist).

Explanation:

1) The most basic electrical circuit consists of a 1) potential difference (voltage) source, which gives the "impulse" to the charge to flow, 2) the wire, which is the medium through which the charge flows), and 3) a resistor.

The resistor is the element with "resistance" to the flow of charge, this is it resists or oppose the flow of charge.

Some components, like motors, filaments, buzzers, which content or are resistors per se, transform the current (flow of charge) in other useful forms of energy (motion, light, heat, sound).

The resistor meets Ohm's law which states R = V / I, at constant temperature.

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

The temperature on the moon is A. hotter than the Earth most of the time B. goes from extremely cold to extremely hot during a lunar day C. about the same as the Earth D. colder than the Earth most of the time Please Explain

When the sun shines, it illuminates only one part of the moon. The article states, "Daytime on one side of the moon lasts about 13 and a half days, followed by 13 and a half nights of darkness. When sunlight hits the moon's surface, the temperature can reach 253 degrees F (123 C). The "dark side of the moon" can have temperatures dipping to minus 243 F (minus 153 C).Oct 22, 2012". Therefore, b is correct

Posted in Physics

What type of disorder is myasthenia gravis? A. Immune disorder B. Inflammatory disorder C. Structural disorder D. Infectious disorder

Immune disorder'" because Myasthenia gravis is a chronic autoimmune neuromuscular disease characterized by varying degrees of weakness of the skeletal (voluntary) muscles of the body. The name myasthenia gravis, which is Latin and Greek in origin, literally means "grave muscle weakness."

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

Yes or no? Do the following have co2 emissions? Coal Oil Natural Gas Nuclear Power Biofuel Hydropower Geothermal Wind Energy Solar Energy Hydrogen

All emits CO2, except nuclear power, hydropower, wind energy, solar energy, and hydrogen. Yes, geothermal power plants emit CO2.

Posted in Physics

A gas is at 5 Kelvin and 1 m3. The temperature is raised to 10 Kelvin. What is the new volume? 2 m3 2 m 5 m

Answer:

The new volume of the gas is 2 m³

Explanation:

It is given that,

Initial temperature, T_1=5\ K

Initial volume, V_1=1\ m^3            

Final temperature, T_2=10\ K

We need to find the new volume. The Charles law gives the relation between the temperature and the volume of the gas.    

i.e

V\propto T

\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}

V_2=\dfrac{V_1}{T_1}\times T_2

V_2=\dfrac{1}{5}\times 10

V_2=2\ m^3

So, the new volume of the gas is 2 m³. Hence, this is the required solution.

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements

Posted in Physics

What types of waves make up the smallest part of the electromagnetic spectrum?

 it's visible light :)


hope this helps, and if you have any more questions feel free to message me!



HAVE  A BEAUTIFUL DAY!!!

TopAcademicTutors.Com

Expert Assignment Help for students who have pending assignments.

For 10$ a page, you can get your written essay.

Tell us your requirements