When a 9.00 V voltage is applied to a resistor, it drives 0.325 A of current through the resistor. How much power does the resistor use? (Unit = W)
Can someone please explain how to do this question.
Answer: 2.925
Explanation: :)
Answer:
2.925
Explanation:
What type of electromagnetic wave has a frequency of around 1012 Hz?
A capacitor is made by taking two sheets of aluminum foil, each 0.022 mm thick and placing between them a sheet of paper which comes from a ream of 500 sheets, the ream being 5.5 cm thick with sheets measuring 216 mm by 279 mm. What is the capacitance of the capacitor made this way if the dielectric constant of the paper is 3.7?
THE ANSWER SHOULD BE (18nF)
The capacitance of the capacitor if the dielectric constant of the paper is 3.7 : 18 nF
Given data :
Thickness of aluminium capacitor = 0.022 mm
Number of sheets = 500
Thickness of ream = 5.5 cm = 0.055 m
measurement of sheets = 0.216 m by 0.279 m
dielectric constant ( k ) = 3.7
Determine the capacitance of the capacitorwe will apply the capacitance formula below
C = Kε₀A / d
= 3.7 * 8.85*10⁻¹² * 0.216 *0.279 / ( 0.055 / 500 )
= 1.8 * 10⁻⁸F ≈ 18nF
Hence we can conclude that The capacitance of the capacitor if the dielectric constant of the paper is 3.7 : 18 nF
Learn more about Capacitance : https://brainly.com/question/13578522
A measurement of a change
in distance over time
Explanation:
Speed is the rate of change of distance with time.What is the direction of the force in question 2?
A) east
B) north
C) up
D) down
d down
Explanation:
i don't have an explanation because my uncle answered this question
1. Identify the force acting as the
centripetal force when a car circulate
around a flat circular track.
O Friction
Gravitation
Normal
O Tension
2. Identify the force acting as the
centripetal force when a bucket is tied
to a string and swung around in a
circle over your head.
O Friction
Gravitation
Normal
Tension
3. Identify the force acting as the
centripetal force when the earth
orbits the sun
O Friction
Gravitation
Normal
Tension
4. Identify the force acting as the
centripetal force when a matchbox
car drives around a loop-the-loop on
its race car track
Answer: 1) Friction
2) Tension
3) Gravitation
4) Normal
Explanation:
What is the mass of a baseball that has a kinetic energy of 105 J and is traveling at 10 m/s?
Answer:
[tex]\boxed {\boxed {\sf 2.1 \ kilograms}}[/tex]
Explanation:
Kinetic energy is the energy an object possesses due to motion. The formula 1/2 the product of mass and the squared velocity.
[tex]E_k=\frac{1}{2} mv^2[/tex]
We know the baseball's kinetic energy is 105 Joules. It is also traveling at a velocity of 10 meters per second. `
First, convert the units of Joules to make unit cancellation easier later in the problem. 1 Joule (J) is equal to 1 kilogram square meter per square second (kg*m²/s²). The baseball's kinetic energy of 105 J is equal to 105 kg*m²/s².
Now we know 2 values:
[tex]E_k= 105 \ kg*m^2/s^2[/tex][tex]v= 10 \ m/s[/tex]Substitute these values into the formula.
[tex]105 \ kg*m^2/s^2= \frac{1}{2} m (10 \ m/s)^2[/tex]
Now we need to solve for m, the mass. Solve the exponent.
(10 m/s)²= 10 m/s * 10 m/s = 100 m²/s²[tex]105 \ kg *m^2/s^2 = \frac{1}{2} m (100 \ m^2/s^2)[/tex]
Multiply on the right side.
[tex]105 \ kg *m^2/s^2 = m (\frac{1}{2} * 100 \ m^2/s^2)[/tex]
[tex]105 \ kg *m^2/s^2 = m (50 \ m^2/s^2)[/tex]
The variable, m, is being multiplied by 50 square meters per square second. The opposite of multiplication is division, so we divide both sides by that value.
[tex]\frac {105 \ kg *m^2/s^2 }{50 \ m^2/s^2}= \frac{ m (50 \ m^2/s^2)}{50 \ m^2/s^2}[/tex]
[tex]\frac {105 \ kg *m^2/s^2 }{50 \ m^2/s^2}= m[/tex]
The units of square meter per square second will cancel out.
[tex]\frac {105 }{50} \ kg= m[/tex]
[tex]2.1 \ kg=m[/tex]
The mass of the baseball is 2.1 kilograms.
The speed of light in a piece of plastic is 1.87 × 10^8 meters per second. What is the absolute index of refraction of this plastic?
options:
1.0
1.6
0.67
1.33
Answer:
n = 1.6
Explanation:
The formula for the calculation of the absolute index of refraction is given as follows:
[tex]n = \frac{c}{v}[/tex]
where,
n = index of refraction
c = speed of light in vacuum = 3 x 10⁸ m/s
v = speed of light in the piece of plastic = 1.87 x 10⁸ m/s
Therefore,
[tex]n = \frac{3\ x\ 10^8\ m/s}{1.87\ x\ 10^8\ m/s}[/tex]
n = 1.6
A race car reaches the finish line and the driver slows down to come to a stop. If it takes the car 10 seconds to stop at a constant acceleration of -12mph/s. What was the car's speed at the finish line?
Answer:
53.64 m/s
Explanation:
Applying,
a = (v-u)/t............. Equation 1
Where a = acceleration of the car, v = final velocity of the car, u = initial velocity of the car, t = time.
make u the subject of the equation
u = v-at............. Equation 2
From the question,
Given: a = -12 mph/s = -5.364 m/s², t = 10 seconds, v = 0 m/s (comes to stop)
Substitute these values into equation 2
u = 0-(-5.364×10)
u = 0+53.64
u = 53.64 m/s
resistance question for physics!!!
Answer:
22
Explanation:
all the resistance numbers added together 2.0+6.0+10.0+4.0
resistance formula : v bettary = v1 + v2 + v3 ....
Calculate the resistance of a resistor that has a voltage drop of 25 V and a current flow of .5 A.
A. 25 Ohms
B. 50 Ohms
C. 12.5 Ohms
D. 0.02 Ohms
Answer:
V=IR
25. =0.5 ×RESISTANCE
RESISTANCE=25/0.5
=50 ohms
answer is option B
In what ways do people use natural resources? What problems does use of those resources cause?
Answer:
The Challenges of Using Natural Resources
Extracting, processing and using natural resources can cause environmental problems such as: air, land and water pollution; disruption or destruction of ecosystems; and a decrease in biodiversity.
temporary magnets are made from soft iron true or false
Answer:
temporary iron r made up of soft iron its " true.."
stay safe healthy and happy.If a wave had a wave speed of 1000 m/s and a frequency of 500 Hz, what is its wavelength?
Answer:
2 metersExplanation:
Wavelength = Speed/Frequency 1000 m/s ÷ 500 hz 2 mhz = sHopes this helps. Mark as brainlest plz!a simple pendulum is hollow from within and its time period is T. how is the time period of pendulum affected when:
a) ¼ of Bob is filled with mercury
b)¾ of Bob is filled with Mercury
c) the bob is completely filled with Mercury
The period of a pendulum is independent of the mass of the bob so whether it's empty or filled with something, the period remains the same.
[tex]period = 2\pi \sqrt{ \frac{length}{g} } [/tex]
Two asteroids are located a certain distance away from each other. They have the same mass . The gravitational force of attraction is f . If the mass of one of the asteroids is doubled, how will the gravitational force be affected
Answer:
F' = 2F
Explanation:
The gravitational force of attraction between asteroids is given by Newton's Law of Gravitation:
[tex]F = \frac{Gm_1m_2}{r^2}[/tex]
where,
F = Force
G = Universal Gravitational Constant
m₁ = m₂ = m = mass of each asteroid
r = distance between asteroids
Therefore,
[tex]F = \frac{Gm^2}{r^2}[/tex] --------------------- eq(1)
Now, if we double the mass of one asteroid:
[tex]F' = \frac{G(2m^2)}{r^2} \\\\F' = 2\frac{Gm^2}{r^2}[/tex]
using equation (1):
F' = 2F
A force of 100 N is used to move a chair 2 m. How much work is done
Answer:
200 J
Explanation:
In the case of a rectilinear movement, the work is calculated as the product of Force (N) * movement (m). In your case, unless the angle between the force vector and the displacement vector is different from 0, the work is:
100 N * 2 m = 200 J
Which property determines and Adams ability to attract electrons shared in a chemical bond?
Answer:
Electronegativity
Explanation:
Answer:
The property that determines an atom;s ability to attract electrons shared in a chemical bond is electronegativity.
Explanation:
Hope you have a great day :)
A projectile is launched from the ground with an initial horizontal velocity of 6.0m/s [right] and an initial vertical velocity of 5.0/s [up]. At what angle from vertical is it launched?
Answer:
θ = 39.8°
Explanation:
Her, we will use the trigonometric ratio of the tangent to find the launch angle of the projectile from the vertical:
[tex]tan\ \theta = \frac{v_y}{v_x}[/tex]
where,
θ = launch angle from the vertical = ?
vy = vertical component of velocity = 5 m/s
vx = horizontal component of velocity = 6 m/s
Therefore,
[tex]tan\ \theta = \frac{5\ m/s}{6\ m/s}\\\\\theta = tan^{-1}(0.8333)[/tex]
θ = 39.8°
There are two pendulums with periods 3 s and 2 s, which one is longer and which one is shorter .
Answer:
3s is longer
2s is shorter
Explanation:
A pendulum is made up of a ball which is referred to as a mass attached to a string which is usually massless.
A period is one swing of the pendulum over and back.
Two pendulums with the same length but different masses would have the same period
When two pendulums with different lengths, the pendulum with the longer length would have a longer frequency and thus the longer period while the pendulum with the shorter length wold have the shorter period
Which of the following organs is not a part of the respiratory system?
A.Nose
B.Lungs
C.Kidney
D.Trachea
Answer:
C
Explanation:
the rest are in the respiratory system.
Answer:
C. kidney
Explanation:
respiratory system means an organ that helps you to breathe a nose,lungs,trachea are an organ to help you breathe. However, Kidney is not, this is because the kidney is in the urinary system which means to eliminate waste from the body. The urinary system also includes bladder, ureters, urethra.
PLS HELP I WILL MARK YOU AS A BRAINLEIST
Take water in a test tube and add a few drops of blue litmus to it. With the help of a
straw blow air into the solution. It turns red. Explain the reason of colour change.
Answer:
A Chemical Reaction towards Oxygen, Water, and the Chemical Color.
How is the half-life of a radioactive isotope determined?
A. By measuring the time it takes for half the parent nuclei in a
sample to become daughter nuclei
B. By measuring the time it takes for half the daughter nuclei in a
sample to become parent nuclei
C. By measuring the time it takes for all the parent nuclei in a sample
to become daughter nuclei
D. By measuring the time it takes for all the daughter nuclei in a
sample to become parent nuclei
Answer:
A
Explanation:
I just did the quiz
The half-life of a radioactive isotope determined by measuring the time it takes for half the parent nuclei in a sample to become daughter nuclei.
What is radioactive decay?The process of radioactive decay is how an unstable atomic nucleus loses energy through radiation. A substance that has unstable nuclei is regarded as radioactive. Alpha, beta, and gamma decay are three of the most prevalent forms of decay, and they all entail the emission of one or more particles.
The duration needed for a quantity to decrease to half of its initial value is known as the half-life. In nuclear physics, the phrase is frequently used to indicate how rapidly unstable atoms disintegrate radioactively or how long stable atoms last. Additionally, the phrase can be used more broadly to describe any kind of exponential decay.
The half-life of a radioactive isotope determined by measuring the time it takes for half the parent nuclei in a sample to become daughter nuclei.
To learn more about radioactive decay refer to the link:
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A 12.0 V voltage is applied to a 1.11 * 10 ^ - 9 * F capacitor. How much charge is stored on the plates?
Answer: 1.332 x 10^-8
Explanation:
The volume of gas decreases at constant temperature to 80% of the inital value. How does the pressure value change relative to the initial value
Answer:
The pressure value changes 400 % relative to the initial value.
Explanation:
Let suppose that the gas behaves ideally and represents a closed system, that is, a system with no mass interactions so that number of moles is conserved ([tex]n[/tex]). Since the variables involved in the isothermal process are pressure ([tex]P[/tex]) and volume ([tex]V[/tex]). Finally, the process is represented by the following relationship:
[tex]P_{1}\cdot V_{1} = P_{2}\cdot V_{2}[/tex] (1)
Where:
[tex]P_{1}, P_{2}[/tex] - Initial and final pressures.
[tex]V_{1}, V_{2}[/tex] - Initial and final volumes.
If we know that [tex]P_{1} = P_{o}[/tex], [tex]V_{1} = V_{o}[/tex] and [tex]V_{2} = 0.2\cdot V_{o}[/tex], then the final pressure of the closed system is:
[tex]P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)[/tex]
[tex]P_{2} = 5\cdot P_{o}[/tex]
The pressure value changes 400 % relative to the initial value.
+ Paul drives at a speed of 80 km/h for a distance of 200 km. Find the time taken.
Answer:
About 2.5 hours
Alex drives his car 80 Km/h due east for 150 minutes to get to his school. How far did he travel in kilometer?
Answer:
200km
Explanation:
Use the formula Distance = speed × time ( transpose the speed formula )
Also remember to converted the minutes into hour because the answer asked for it in Km do this by dividing by 60
2 pts
The energy and penetrating power of nuclear radiation in decreasing order is:
Alpha > beta > gamma
Beta > alpha > gamma
Gamma > beta > alpha
Answer:
I think the answer 1
Explanation:
im probably wrong too i dont know
Gravity is the force that objects exert on each other because of their masses. The strength of the gravitational force between two objects
depends on two factors, mass and distance. How is gravity related to mass and distance? Choose ALL the statements that apply.
If one of the masses is doubled, the force of gravity between the objects is doubled.
As distance between the objects increases, the force of gravity decreases.
As distance between the objects increases, the force of gravity increases.
The more mass two objects have, the less the force of gravity the masses exert on each other
Greater mass results in greater force.
Explanation:
Newton's law of universal gravitation states that the force of gravity affects everything with mass in the universe. Newton's law also states that the strength of gravity between any two objects depends on the masses of the objects and the distance between them
A hunter stood at about 60 m away from a tree. He used the bow to release the arrow in order to shoot a coconut held by a monkey in the tree. The coconut was at a height of 25 m from the ground. The hunter aimed directly at the coconut and the arrow left the bow at 45 m/s making an angle of 20 degree to the horizontal. At the moment the hunter released the arrow, the monkey dropped the coconut such that it falls vertically from rest. Neglect air resistance and the arrow's size. What is the time taken for the arrow to hit the coconut?
Answer:
Time taken to reach the tree
they have given the maximum height which is 25m
therefore...
v=u+at (upward)
0 = 45sin(20)-9.81t
t = 1.56s