Answer:10842.33m/s
Explanation:
F=qvBsine
V=f/(qBsine)
V=(3.5×10^-2)÷(8.4×10^-4×6.7×10^-3×sin35)
V=10842.33m/s
an electric soldering iron takes 5 amperes at 110 volts.what is the power used in watts?in kilowatts?
Answer:
550 W, 0.55 kW
Explanation:
Power = Current * Voltage
P = 5A * 110V
P = 550 W
There's 1000 W in 1 kW, so P = 0.55 kW.
If an electric soldering iron takes 5 amperes at 110 volts,then the power used in watts would be 550 watts
The power used in kilowatts comes out to be 0.55 kilowatts.
What is power?The rate of doing work is known as power. The Si unit of power is the watt.
Power =work/time
The mathematical expression for the power is as follows
P = VI
where P is the power
V is the voltage
I is current passing through the circuit
As given in the problem an electric soldering iron takes 5 amperes at 110 volts,
I = 5 Ampere
V = 110 volts
By substituting the values of the current and the voltage in the formula of the electric power
P = VI
P= 110V × 5 A
P= 550 watt
1000 watts = 1 kilowatt
1 watt = 1/1000 kilowatts
550 watt = 550/1000 kilowatts
= 0.55 kilowattts
Thus, the power used in watts would be 550 watts and the power used in kilowatts comes out to be 0.55 kilowatts.
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explain why houses built of stone take a long time to warm up but once they are warm they stay warm for a long time
they take a long time to heat up because stone has a high heat capacity, meaning it takes more heat to warm it up than other materials. so if you warm it up it will also take a long time to get cold because it is efficient at trapping and insulating heat.
Stone has a high specific heat capacity so it takes a lot of energy to get it to reach a good temperature.
Stones absorbs heat, holds it for a period of time, and then passes it on. However, if the walls are thick enough then it can act like insulation in that it takes quite awhile for the heat to penetrate.
What is specific heat capacity ?
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C)
Stone has a high specific heat capacity so it takes a lot of energy to get it to reach a good temperature. One it has reached that temperature it has to lose a lot of energy for the temperature to go down
Stones absorbs heat, holds it for a period of time, and then passes it on. However, if the walls are thick enough then it can act like insulation in that it takes quite awhile for the heat to penetrate.
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Please I need help........
Answer:
7.46 J/kg/K
Explanation:
The heat absorbed or lost is:
q = mCΔT
where m is the mass, C is the heat capacity, and ΔT is the change in temperature.
Given q = 15.0 J, m = 0.201 kg, and ΔT = 10.0 °C:
15.0 J = (0.201 kg) C (10.0 °C)
C = 7.46 J/kg/°C
Which is the same as 7.46 J/kg/K.
7.49 Can you help me since I help you
Help on 56 I don’t understand
Answer:
15 m/s
Explanation:
Initial momentum = final momentum
(25 kg) (15 m/s) + (25 kg) (0 m/s) = (25 kg) (0 m/s) + (25 kg) v
v = 15 m/s
you have a suspect on the run in a dry, wooded area; they’ve ditched the gun but are hiding from you. how long do you have to find them before vital proof they fired a gun will probably no longer be on their body?
A. a few hours
B. about 24 hours
C. a few days
D. about a week
Answer:
C. a few days
Explanation:
The evidence that we will have to investigate is the gunshot residue on the body of the suspect. When a person fires a gun there will be a deposition of material from the components of the chemicals present in the gun. This deposit is called gunshot residue and consists of particles of the propellant or explosive primer.
Experimentation has shown that the period of time that is person will test possible for gunshot residue is 5.27 days.
Answer:
A Few Hours
Explanation:
Residue on the hands can be difficult to find, even with modern forensic techniques. Part of the reason for this is that the residue doesn’t last for long on hands, particularly if the shooter washes, wipes, or rubs their hands. Studies indicate that even within hours of a shooting, it can be very difficult to find gunpowder residue on the hands of a shooter.
HELP ASAP
In which scenario is thermal energy being transferred by radiation?
A) a lava lamp
B) a hot of coffee in he snow
C) baby chicks under a heat lamp
D) an iron ironing a shirt
Answer:
C) baby chicks under a heat lamp
Explanation:
The heat transfer by radiation is observed in the case that some chicks are heating with a heat lamp since heat is transmitted without contact between the surfaces
In the case of ironing the shirt, the transfer is made by the contact of the iron with the shirt. In the case of the lava lamp, the most important transfer is that of light energy, and in the case of coffee in the snow, when the coffee cup is placed in the snow, the heat will also be transferred by the contact of the surfaces
Answer:
The answer is C.)
Explanation:
I hope this helps :)
What have psychologists learned about perception from optical illusions ?
Answer:
Explanation:
That an optical illusion somehow interferes with the way we see things. Even simple illusions can completely fool us. If you search out the term, you'll see all kinds of them.
Most critically we see one thing and know another to be true. But knowing the truth doesn't help us. We still see and believe the truth of the illusion.
The correct answer to this open question is the following.
Psychologists learned about perception from optical illusions that the response of the senses, when faced with optical stimuli, is different and can be measured because the human can interpret an optical stimulus as being real.
Gustav Fechner (1801-1887) was a German physicist who developed the science that studied quantitative relations of stimuli and sensations. It is called psychophysics. In 1860, he published the book "Elements of Psychophysics," in which he studies how the perception determines the sensory input.
According to the scale, which of these substances is the strongest acid?
A) NaOH
B) blood
C) bleach
D) lemon juice
Answer:
Lemon juice is your answer.
Eels are examples of
a. jawless fish
b. reptiles
c. cartilaginous fish
d. bony fish
During a race, a runner runs at a speed of 6 m/s. Four seconds later, she is running at a speed of 10 m/s. What is the runner's acceleration?
1 m/s². A runner that change is speed from 6 m/s to 10 m/s has an aceleration of 1 m/s².
the key to solving this problem is using the kinematics equation [tex]a=\frac{v_{f} -v_{0}}t}[/tex] which means that the aceleration is related to a change of velocity in an interval of time.
We know that the runners runs at a initial velocity of 6 m/s, four seconds later, she is running at a speed of 10 m/s.
[tex]a=\frac{10\frac{m}{s}-6\frac{m}{s}}{4s} \\a=1\frac{m}{s^{2} }[/tex]
Match the following items. 1. empathy a personal view of a situation; ability to understand the senses 2. perception mental health professional who attended medical school 3. cognition concerned with the treatment of disease 4. humanism a person's ability to think 5. psychiatrist identifying with someone's situation or feelings 6. clinical a person should be considered as a whole, not in parts 7. educational psychologist concerned with the way humans learn inside the school setting
Answer:
perception - A personal view of a situation...
Psychiatrist - mental health professional...
Clinical - concerned with the treatment of disease...
cognition - a person's ability to think.
empathy - Identifying someone's situation...
humanism - a person should be considered as a whole...
Educational psychologist - concerned with the way humans learn ...
Explanation:
1. Perception is the ability to interpret and understand what we sense through our different senses. In other words, it is the ability to understand what is going on in our environment through sight, sound, touch, and the like.
2. A psychiatrist is a medical doctor that deals with the treatment, prevention, and diagnosis of metal disorders. They can also treat patience through medication because they are allowed to prescribe medicines.
3. Clinical medicine involves the actual treatment of patients. You can think of it as the actual practice of medicine, and not theoretical and not just work in laboratories.
4. Cognition is a mental process that not only involves thinking, but also comprehension. It involves acquiring knowledge through experience and observation.
5. Empathy is the ability to understand how someone else is feeling in a particular situation. There's a saying, "Putting yourselves in other's shoes." This means to understand how it feels to be in that situation, which is also known as the act of empathizing.
6. Humanism, as the name suggests is HUMAN-centered. This means that one is considered not only by what others see but what the person sees as well. It is concerned with everything that has to do with that person both externally and internally.
7. Educational psychologist deals with children and school specifically. They assess how humans learn, how they think and how they behave in the school setting. They also do councelling for students, parents, teachers, and other people involved in the educational communities.
How does a nuclear power plant produce electricity?
Quickly moving neutrons coming out of nuclear reactions are used to turn turbines that produce electricity.
Quickly moving neutrons coming out of the reaction create a gas which turns a turbine that produces electricity.
Quickly moving neutrons give their kinetic energy to the surrounding water. The water's energy is then used to turn turbines and produce electricity.
Quickly moving neutrons coming out of the reaction are slowed down by water. The water heats up and turns into steam. The steam turns the turbine and produces electricity.
Answer: Quickly moving neutrons coming out of the reaction are slowed down by water. The water heats up and turns into steam. The steam turns the turbine and produces electricity.
Explanation: Hope that helps :D
The Answer is: D. Quickly moving neutrons coming out of the reaction are slowed down by water. The water heats up and turns into steam. The steam turns the turbine and produces electricity.
what is the difference between rutherford's model of the atom and bohr's model of the atom
Answer:
Rutherford described the atom as consisting of a tiny positive mass surrounded by a cloud of negative electrons. Bohr thought that electrons orbited the nucleus in quantised orbits. Bohr built upon Rutherford's model of the atom. ... So it was not possible for electrons to occupy just any energy level.
Explanation:
Rutherford's model described electrons in orbits like a solar system, which would lead to collapse, whereas Bohr's model introduced quantized orbits that explained atomic stability and spectra.
The main difference between Rutherford's model of the atom and Bohr's model of the atom lies in how they describe the behavior of electrons around the nucleus. Rutherford's model predicted a miniature solar system with electrons in circular or elliptical orbits that, according to classical mechanics, would cause the atom to collapse due to continuous electromagnetic radiation emission. However, Bohr's model introduced the concept of quantized orbits, assuming electrons to move in circular orbits with quantized energies, angular momentum, and radii based on the quantum number 'n.'
Bohr's quantum theory was a significant advancement as it explained why electrons do not radiate energy as they orbit the nucleus. In Bohr's model, electrons remain in their quantized orbits without emitting electromagnetic radiation, but when an electron transitions between orbits, the atom emits or absorbs electromagnetic radiation, resulting in discrete spectra that align with observational evidence. This model, while still incorporating aspects of classical mechanics, corrected the stability issue of the atom and provided a basis for explaining atomic spectra, particularly that of hydrogen.
When sound waves travel through a medium, the particles of the medium move parallel to the wave motion. Which typeof wave displays this behavior?
A. Longitudinal Waves
B. Transverse Waves
C. Perpendicular Waves
D. Electromagnetic Waves
Answer: It should be A
Explanation:
Answer:A. Longitudinal waves
Explanation: The displacement of the medium parallel to the propagation of the wave is a characteristic of longitudinal waves. Longitudinal waves are also characterized by compression and rarefraction.
A wave propagated along the length of a stretched Slinky toy, the increase and decrease of the coil gives a good example of longitudinal wave.
Which sentence uses the correct form of the verb choose?
a Dad chosed a striped tie to wear with his suit.
b Dad chose a striped tie to wear with his suit.
c Dad chosen a striped tie to wear with his suit.
d Dad choose a striped tie to wear with his suit.
Answer:
The answer is B
Explanation:
It's past tense and dad is singular
Final answer:
The correct answer is b: "Dad chose a striped tie to wear with his suit," as 'chose' is the appropriate simple past tense form of 'choose.' It's important to use the correct verb tenses to clearly convey when actions occur.
Explanation:
The question asks: Which sentence uses the correct form of the verb choose? The correct answer is option b: "Dad chose a striped tie to wear with his suit." This is because 'chose' is the simple past tense form of the verb 'choose,' which is appropriate given the context of a completed action.
Verb tenses are crucial for conveying when an action happens. In English, getting the irregular verbs right, such as 'choose,' requires familiarity with their present, past, and past participle forms. The incorrect options a, c, and d use 'chosed,' 'chosen,' and 'choose,' respectively, which are not correct in this context. 'Chosed' is not a word, 'chosen' is a past participle that needs an auxiliary verb, and 'choose' is the present tense form.
A train travels 600 km in 4 hours. What is the speed of the train?
Answer:
150 km/h
Explanation:
A speed measures a distance traveled over a period of time. We usually express speed in terms of km/h for example.
That train travels 600 km in 4 hours.
To find its average speed, we just need to divide 600 km / 4 hours
We then get 150 km/h
That's said to be the average speed since it's the total distance in the total of time.... it might have been slower or faster at different points during that distance/time.
can anyone explain the seasons of the earth?
Answer:
The Earth's axis is tilted from perpendicular to the plane of the ecliptic by 23.45°. This tilting is what gives us the four seasons of the year - spring, summer, autumn (fall) and winter. Since the axis is tilted, different parts of the globe are oriented towards the Sun at different times of the year.
Explanation:
mark me as brainliest
1. How did unarmed defense techniques develop? Why were they needed? Why not just use a knife or a sword?
Answer:
Buddhist monks traveled from india to china and because of their beliefs they weren't allowed to use weapons
Sound waves travel the fastest through which of the following?
A.cold gas
B.hot gas
C. Hot vacuum
D. Cold vacuum
The molecules in hot gas move faster than cold gas. This would allow sound waves to travel faster.
Vacuums, do not have air pressure to transfer energy, so sound would not be able to travel very fast.
The answer is B. Hot Gas.
Answer:
Option B
Explanation:
Sound waves are mechanical waves it means they require a material medium for their propagation.
So, sound cannot travel through hot vacuum or cold vacuum.
The velocity of sound waves is directly proportional to the square root of absolute temperature of gas.
As the temperature of hot gas is more so sound travel fastest in hot gas.
Sound with a frequency of 950 Hz and a wavelength of 1 m will travel _____ kilometers in 5 minutes.
A.104
B.285
C.443
D.679
E.900
Answer:
B. 285 km/5 min
Explanation:
The rule that links velocity, wavelength and frequency is:
V = λν
where:
V is the velocity that we want to find
λ is the wavelength of sound = 1 m
ν is the frequency of the wave = 950 Hz
Substitute to get the velocity as follows:
V = 1 * 950 = 950 meters/sec
Now, we need to convert the meter/sec into Km/5 minutes
We know that:
To convert from meter to Km, we will divide by 1000
To convert from sec to minute, we will divide by 60 which means that, to convert from sec to 5 minutes, we will divide by 5*60 = 300
Based on this:
[tex]950 \frac{meter}{sec}=950*\frac{\frac{1}{1000}}{\frac{1}{300}} = 950*\frac{3}{10}=285 km/5 min[/tex]
Hope this helps :)
Final answer:
To find the distance travelled by sound in 5 minutes, we calculate the speed using the formula v = fλ, resulting in 950 m/s. Converting to km/min and multiplying by the time, we find the sound travels 285 kilometers in 5 minutes, corresponding to option B.
Explanation:
The question is asking to calculate the distance travelled by sound with a given frequency and wavelength over a period of 5 minutes.
First, we find the speed of sound (v) using the formula v = fλ, where f is frequency and λ is wavelength.
Speed of sound = 950 Hz × 1 m = 950 m/s.
To convert speed to kilometers per minute, we divide by 1000 to convert meters to kilometers and then multiply by 60 since there are 60 seconds in a minute:
Speed in km/min = (950 m/s) / 1000 × 60 = 57 km/min.
To find the distance travelled in 5 minutes, we multiply the speed in kilometers per minute by the duration:
Distance travelled = 57 km/min × 5 min = 285 km.
Therefore, the correct answer to the question is 285 kilometers, which corresponds to option B.
an object is placed in front of a curved mirror as shown. which of the labeled positions is the current position of the image
Answer:A
Explanation:
The image is formed behind the mirror.
Answer:
a
Explanation:
took the test
How does a convex mirror form an image?
A.It bends the light toward a focal point.
B.It bends the light away from a focal point.
C.It bounces the light toward a focal point.
D.It bounces the light away from a focal point.
Answer:
D.It bounces the light away from a focal point.
Explanation:
A convex mirror reflects the incident light away from the focal point of the mirror hence forming a virtual image.Light from a point will be bounced into different directions according to the law of reflection rather than being directed to a single point.To know the image position, an extrapolition of the relected line should be extended behind the mirror to locate the virtual image.
A convex mirror forms an image by reflecting light away from a focal point due to its outward facing curved surface, producing a smaller and upright image.
Explanation:A convex mirror forms an image by bending, or refracting, light away from a focal point (B). This is due to the mirror's curved, outward facing surface. When light rays strike the mirror, they are reflected and diverge outward, appearing to come from a virtual focal point behind the mirror. As a result, the formed image is smaller than the object and is upright, which is why convex mirrors are often used in places where a wide field of view is required, such as in vehicle side mirrors and security mirrors in shops.
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Which change will always result in an increase in the gravitational force between two objects?
increasing the masses of the objects and increasing the distance between the objects
decreasing the masses of the objects and decreasing the distance between the objects
increasing the masses of the objects and decreasing the distance between the objects
decreasing the masses of the objects and increasing the distance between the objects
Answer:
Increasing the masses of the objects and decreasing the distance between the objects
Explanation:
The force of gravity pulls every body with mass towards the center of the earth.This is the force of attraction between two bodies as a result of their masses.Gravity force is directly proportional to the mass of a body.A body with more mass experiences a greater force of gravity.Additionlay, when the distance between two bodies decreases, the gravitational force increases.
Answer:
Increasing the masses of the objects and decreasing the distance between the objects
Explanation:
Give 3 examples of something with potential energy.
Answer with explanation:
The energy which is stored in an object because of its position or state is known as the Potential energy.
Here are a few examples of objects having potential energy:
1. A car on the hill - since the car is on a heightened position, it will have potential energy.
2. A stretched rubber band - when a rubber band is stretched to one side, it has potential energy.
3. A book placed on a table - a book on the table before it falls down has potential energy.
A race car has a centriple acceleration of 15.625 m/s as it goes around a curve if the curve is a circle with radius 40 m what’s is the speed of the car
Answer:
25 m/s
Explanation:
Centripetal acceleration is the square of the tangential velocity divided by the radius.
a = v² / r
15.625 m/s² = v² / (40 m)
v² = 625 m²/s²
v = 25 m/s
The speed of the car is 25 m/s.
Question 36 pls
Physics
[tex]R=\frac{U}{I}=\frac{0.5V}{180\cdot10^{-6}A}\approx2.78k\Omega[/tex]
Solve the current and voltage problems for the ci
current and voltage problems for the circuit below using your knowledge of current and voltage trends in series and parallel.
Explanation:
Each resistor has a resistance of R.
In the first problem, each row of three resistors in series has a resistance or 3R.
A₂ = 4A, so the voltage drop across the rows is:
V = IR
V = (4)(3R)
V = 12R
The voltage drop equals the voltage gain (Kirchoff's voltage law). The battery has a voltage of 9V, so:
9 = 12R
R = 0.75 Ω
The three rows are in parallel with each other, so the total resistance is:
∑R = (1/(3R) + 1/(3R) + 1/(3R))⁻¹
∑R = R
∑R = 0.75 Ω
The current A₁ can be found with Ohm's law:
V = IR
9 = (A₁) (0.75)
A₁ = 12 A
Using Ohm's law to find V₁, V₂, and V₃:
V = IR
V₁ = (4)(0.75)
V₁ = 3V
V₂ = (4)(2×0.75)
V₂ = 6 V
V₃ = (4)(3×0.75)
V₃ = 9 V
In the second problem, all the resistors are in series. So the total resistance is:
∑R = 8R
The battery voltage is 16V, and A₂ = 6A. So using Ohm's law:
V = IR
16 = (6)(8R)
R = 1/3 Ω
Since there's only one loop, the current is the same at all points. So A₁ = A₂ = 6A.
Using Ohm's law to find each voltage:
V = IR
V₁ = (6)(1/3)
V₁ = 2V
V₂ = (6)(2×1/3)
V₂ = 4 V
V₃ = (6)(4×1/3)
V₃ = 8 V
V₄ = (6)(2×1/3)
V₄ = 4 V
For the circuit shown in the left side of the image, A₁=12A, V₁=3V, V₂=6V, and V₃=9V.
The voltage source is Vs = 3(3V) = 9V is connected in parallel to the three branches that each contain three equals light bulbs, the three branches are in parallel meaning that the voltage in each branch is 9V.
The current through one branch is A₂ = 4A, we can calculate the equivalent resistance in that branch using Ohm's Law:
Req = V/I, where I = A₂ = 4A
Req = 9V/4A = 2.25Ω
We can calculate the resistance in each light bulb, there are three light bulb in each branch that have a equivalent resistance of 2.25Ω, the light bulbs are in serie, so:
Req = R + R + R = 3R
The resistance of each light bulb is R = Req/3 = 2.25Ω/3 = 0.75Ω
To calculate V₁, using Ohm's Law:
V₁ = I R = (4A)(0.75Ω) = 3V
Then, the other branches are in parallel and it has the same amount of light bulbs and the same characteristics, each branch has a equivalent resistance of 2.25Ω, and each light bulb has a resistance of 0.75Ω.
To calculate V₂ and V₃:
We know that the voltage in each branch is 9V, each light bulb has a drop of voltage of 3V. So, the total voltage in one branch is the sum of each drop of voltage on each light bulb Vt = 3V + 3V + 3V = 9V.
V₂ = 3V + 3V = 6v
v₃ = Vt = 3V + 3V + 3V = 9V
To calculate the total current A₁ through the circuit, we know that the current through each branch is 4A, the total current A₁ is:
A₁ = 3A₂ = 3(4A) = 12A
For the circuit shown in the right side of the image, A₁=A₂=6A, V₁=2V, V₂=V₄=4V, and V₃=8V.
The voltage source is Vs = 4(-4V) = -16V connected in series with 8 light bulbs, the current flow through each light bulb, It= A₁ = A₂ = 6A. The voltage source is Vs= -16V, the '-' means that the current flows in the opposite direction.
To calculate the equivalent resistance of the circuit, using Ohm's Law:
Req = Vs/It = 16V/6A = 2.67Ω
The resistance of each light bulb is R = Req/8 = 2.67Ω/8 = 0.33Ω
The drop of voltage on each light bulb is:
V = It R = (6A)(0.33Ω) = 2V
V₁ = 2V
V₂ = V₄ = 2(2V) = 4V
V₃ = 4(2V) = 8V
Fossils found in the La Brea tar pits indicate a California climate that was A) similar to today's climate. B) similar to the present-day tundra. C) desert-like, much drier and hotter than today. D) milder than today's climate, with high precipitation.
Answer:
A- similar to todays climate
Explanation:
I answer d and got it wrong
Fossils found in the La Brea tar pits indicate a California climate that was similar to today's climate. The correct option is A.
What is La Brea famous for?The La Brea Tar Pits is famous for the Fossils found in the Ice Ages,. The California climate still falls within our current climate.
California climate is like Mediterranean with somewhat like warm, dry summers with mild and wet winters. The average coastal temperature is around 70°F to 80°F.
Thus, fossils found in the La Brea tar pits indicate a California climate that was similar to today's climate. The correct option is A.
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If a certain quantity of gas has a volume of 30cm cube day a pressure of 1*10^5 pa what is its volume when the pressure is 2*10^5
Answer:
200000
Explanation:
Which form of energy does a battery-powered flashlight receive as an input?
A.
chemical potential energy
B.
radiant energy
C.
solar energy
D.
thermal energy
Answer:
A
Explanation:
Energy is stored inside the batteries. Thus it is chemical potential energy
Answer:
A. Chemical Potential Energy
Explanation:
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