Answer: Energy is conserved.
Explanation: Energy stored in spring = Potential energy gained by object at maximum height
The period of the sound waves produced by the motor is 8.3 milliseconds.
Calculate the frequency of the sound waves.
Answer:
120.48hz
Explanation:
f=1/t..........
Either the wavelength, velocity, or wave period—the amount of time it takes for a wave cycle to complete—must be known. If you know the period, divide 1 by it and, if necessary, convert it to seconds. The outcome will be the frequency in Hertz.
What frequency of the sound waves?As with all waves, the relationship between the speed of sound, its frequency, and its wavelength is vw=f, where vw is the speed of sound, f is the frequency, and is the wavelength.It is necessary to know either the wavelength, the velocity, or the wave period, which is the duration of a wave cycle.
Therefore, More oscillations are produced at higher frequencies. Hertz are the frequency measurement units (Hz). Noises between 20 Hz and 20,000 Hz can be heard by those with normal hearing. Ultrasound is a term for frequencies greater than 20,000 Hz.
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How to solve it? Three capacitors with capacities of 600 pF, 300 pF, 200 pF are connected in series. The 60 V voltage is applied to the group. Calculate the voltage on each capacitor. Answer: 10V, 20V, 30V.
Answer:
1. Voltage across 600 pF is 10 V.
2. Voltage across 300 pF is 20 V.
3. Voltage across 200 pF is 30 V.
Explanation:
We'll begin by calculating the total capacitance of capacitor. This can be obtained as follow:
Capicitance 1 (C₁) = 600 pF
Capicitance 2 (C₂) = 300 pF
Capicitance 3 (C₃) = 200 pF
Total capacitance (Cₜ) =?
1/Cₜ = 1/C₁ + 1/C₂ + 1/C₃
1/Cₜ = 1/600 + 1/300 + 1/200
1/Cₜ = 1 + 2 + 3 / 600
1/Cₜ = 6/600
1/Cₜ = 1/100
Cₜ = 100 pF
Next, we shall convert 100 pF to Farad (F). This can be obtained as follow:
1 pF = 1×10¯¹² F
Therefore,
100 pF = 100 pF × 1×10¯¹² F / 1 pF
100 pF = 1×10¯¹⁰ F
Thus, 100 pF is equivalent to 1×10¯¹⁰ F.
Next, we shall determine the charge. This can be obtained as follow:
Voltage (V) = 60 V
Capicitance (C) = 1×10¯¹⁰ F
Charge (Q) =?
Q = CV
Q = 60 × 1×10¯¹⁰ F
Q = 6×10¯⁹ C
1. Determination of the voltage across 600 pF.
Capicitance 1 (C₁) = 600 pF = 6×10¯¹⁰ F
Charge (Q) = 6×10¯⁹ C
Voltage 1 (V₁) =?
Q = C₁V₁
6×10¯⁹ = 6×10¯¹⁰ × V₁
Divide both side by 6×10¯¹⁰
V₁ = 6×10¯⁹ / 6×10¯¹⁰
V₁ = 10 V
2. Determination of the voltage across 300 pF.
Capicitance 2 (C₂) = 300 pF = 3×10¯¹⁰ F
Charge (Q) = 6×10¯⁹ C
Voltage 2 (V₂) =?
Q = C₂V₂
6×10¯⁹ = 3×10¯¹⁰ × V₂
Divide both side by 3×10¯¹⁰
V₂ = 6×10¯⁹ / 3×10¯¹⁰
V₂ = 20 V
3. Determination of the voltage across 200 pF.
Capicitance 3 (C₃) = 200 pF = 2×10¯¹⁰ F
Charge (Q) = 6×10¯⁹ C
Voltage 3 (V₃) =?
Q = C₃V₃
6×10¯⁹ = 2×10¯¹⁰ × V₃
Divide both side by 2×10¯¹⁰
V₃ = 6×10¯⁹ / 2×10¯¹⁰
V₃ = 30 V
What is the direction of the force of an object moving in a circle?
1.toward the center of the circle
2.toward the outside of the circle
3.straight up
4.45 degree angle
Answer:
The answer is 45 degree angle
6. A car accelerates from rest to 5m/s in 20 s. The force from the engine is 2000N. The force of air resistance and friction acting is 1000N. What is the cars mass?
Answer:
net force= 2000-1000=1000
a=v-u/t=5/20=1/4
m=?
m=f/a
=1000÷1/4=4000kg
A pitcher throws a ball with a mass of 0.15 kg at a batter with a velocity of 45 m/s towards the batter. The batter exerts a Force of 4500 N opposite the direction of the ball for a time of 0.003 s. What is the velocity of ball coming off the bat?
please if you can do the work i’ll mark you brainliest!!
Answer:
-135m/s
Explanation:
Impulse P=change in momentum
Let the final velocity be -Vf (negative sign due to opposite direction)
Average force =Impulse/Time
=m(-Vf-Vi)/t
=>0.15m.g (-Vf-45)/0.003=4500N
=>0.15 (-Vf-Vi)=13.5
=>(-Vf-Vi)=90
Given,Vi=45
=>(-Vf) =90+45
=>(-Vf)=135
=>Vf = -135m/s
Hope it helps!!!
The velocity of ball coming off the bat will be -135m/s. Negative shows the direction.
What is velocity?The change of distance with respect to time is defined as velocity. It is a time-based component. Its unit is m/sec.
The given data in the problem is:
m ( mass) =0.15 Kg
u is the initial velocity of fall =45 m/sec
v is the final velocity= ?
From the Newton's second law of motion;
Impulse = change in momentum
[tex]\rm I= \triangle P \\\\ Ft = m(v-u) \\\\ 4500=\frac{0.15(V-45)}{0.003} \\\\ V = -135 \ m/sec[/tex]
Hence,the velocity of ball coming off the bat will be -135m/s.
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HELP please!!!!!!!!!!!!!!!
10. CALCULATE: Find the amount of power used in each of the following examples. Show your calculations. a. You use a force of 10 N to move a box 100 m in 10 seconds. b. An athlete lifting weights does 900 J of work in 1 second. C. A truck does 30,000 J of work in 15 seconds. d. A fumiture mover uses a force of 150 N to push a large trunk 5 m across the floor in 5 seconds
Answer:
please find attached pdf
Explanation:
10 points to whoever answers!!!
What is the formula for work? What is the formula for power?
Answer:
power= work done /time.
Answer:
W = Force * distance
Power = W/ time
Explanation:
The 25-mph zone is 150 yards long. How much time did the student save (in seconds) by speeding past the school
Answer:
Time = 12.27seconds
Explanation:
Given
Speed = 25miles/hour
Distance = 150 yards = 150(0.000568182)miles
Distance (in miles) = 0.0852273miles
Get the time
Speed = Distance/Time
Time = Distance/Speed
Time = 0.0852273/25
Time = 0.0034hours
Time = 0.0034 * 3600secs
Time = 12.27seconds
5kg of copper ball and I kg of water are at the same temperature of 31 C. Which
substance loses more heat energy, when both of them are cooled upto 30°C
Answer:
r
Explanation:
Rewrite the following sentences choosing the right words given between the
| How many/much) (tiverivera) (ts/are) there in Lebanon?
How many/muen) (people/population) (live/lives) in the South
Answer:
How muen population lives in the South
Answer:
How many people live in the South
I'm not sure about the first one sorry
what is first law of motion
Answer:
newton's first law hope this helped
Which orgen in the urinary system regulates the water content and remove the toxic waste products from the blood?
Answer:
The Kidneys
Explanation:
The Kidneys remove the toxic stuff that you dont need anymore. Therefore the kidneys rather than the everything else removes blood and toxic waste.
4
(a) Which arrow shows the amplitude of the wave?
(1 mark)
Answer:
hmmm, where is the image?
but still let me tell you
Explanation:
amplitude of a wave is the maximum displacement of a particle from its rest position
so the arrow should be from the middle of the wave to the top of the crest or to the bottom trough,
from the middle
okay?
hope this helps, but be sure to add the image next time
what is SI unit of Meter
Answer:
There is not such thing as SI unit of meter
Meter is SI unit for length
On Earth, the gravitational field strength is 10 N/kg. Calculate E for a 4 kg bowling ball that is being
held 2 m above the ground
Answer:
People are exposed to sources of radiation in all aspects of everyday life. Radioactive sources can be very useful but need handling carefully to ensure safety.
Explanation:
Which of the following would have the most momentum?
A.
A light ball moving slowly
B.
A heavy ball moving slowly
C.
A light ball moving quickly
D.
A heavy ball moving quickly
A heavy ball moving quickly will have the most momentum
The right option is D. A heavy ball moving quickly.
What is momentum?
This can be defined as the product of the mass of a body and its velocity.
The S.I unit of momentum is kgm/s.
The formula of momentum is
M = mv.............. Equation 1Where:
M = Momentum of the ballm = mass of the ballv = velocity of the ball.From the formula above, it can be seen that momentum is directly proportional to
The mass of the ballThe velocity of the ball.Therefore, A heavy ball moving quickly will have the most momentum
Hence, the right option is D. A heavy ball moving quickly.
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PLS HELP WITH THIS DENSITY QUESTIONS AND WHEN SHOWING STEPS PLS USE GRASS
Calculate the density of aluminum if you have a piece of aluminum that has a volume of 48.9 cm³.When the piece is measured it is found to have a mass of 132 g.
A small amount of copper is found to have a mass of 27 g. Calculate the density of copper if the volume of the sample is 3.0 cm³.
The volume of a piece of iron is 65 cm³. If the piece of iron has a mass of 512 g. Calculate the density of the sample of iron.
A stick of cedar wood has a mass of 1.2 kg. It has a volume of 3243 cm³ . What is the density of cedar wood?
Zinc has a density of 7.14 g/cm³. If you are given 50 g of zinc calculate the volume of the sample.
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?
Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this Information, calculate the density of mercury.
What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm³
Answer:
Explanation:
Density = mass/volume
132g/(48.9 cm³) = 2.7 g/cm³
(27 g)/(3 cm³) = 9 g/cm³
512 g/(65 cm³) = 7.9 g/cm³
1.2 kg/(3243 cm³) cm³ = 1200 g/(3243 cm³) = 0.37 g/cm³
Which has more momentum? *
2 points
a ball of mass 2 kg moving at 30 m/s
a ball of mass 3 kg moving at 20 m/s'
a ball of mass 4 kg moving at 30 m/s
a ball of mass 5 kg moving at 20m/s
Answer:
4 kg at 30 m/s
Explanation:
comparing in pair, the 3rd is more than the 1st, and the 4th is more than the 2nd, so it boils down to the lasts two. calculate, and im pretty sure you get 4 kg at 30 m/s...
Momentum of a ball of mass 2 kg moving at 30 m/s = 2 kg × 30 m/s = 60 kg m/s
Momentum of a ball of mass 3 kg moving at 20 m/s = 3 kg × 20 m/s = 60 kg m/s
Momentum of a ball of mass 4 kg moving at 30 m/s = 4 kg × 30 m/s = 120 kg m/s
Momentum of a ball of mass 5 kg moving at 20 m/s = 5 kg × 20 m/s = 100 kg m/s
So, highest momentum is of a ball of mass 4 kg moving at 30 m/s (120 kg m/s).
A scientist performed an investigation involving a reaction that produced AI, (SO )3. How many sulfur atoms are
represented in this formula?
Answer:
D
Explanation:
Because you add them all up it equals 9
Rahul has 2 bulbs connected across two cells in a simple circuits shown. How can he make the bulbs glow dimmer?
Answer:
in the parallel connection the light bulbs shine less than in the series connection
Explanation:
In a series circuit the current through the whole circuit is the same, therefore the power (brightness) of each bulb is
P = i² R
where R is the resistance of each bulb and i the current of the circuit.
If we connect the light bulbs and the cells in parallel, the current in the circuit is the sum of the east that passes through each light bulb,
i = i₁ + i₂
if the two light bulbs are the same
i = 2 i₁
i₁ = i / 2
so the power of each bulb is is
P = i₁² R
P = R i² / 4
P = ¼ P_initial
Therefore we see that in the parallel connection the light bulbs shine less than in the series connection
Eiman connects eight 12Ω lamps in series. What is
the total resistance of the circuit?
please help
Answer:
Total resistance is 96 ohm
Explanation:
Rs = R1 +R2 + R3 + R4 + R5 +R6 + R7 + R8
where R1 is lamp 1
R2 is lamp 2 n so on
Rs = 12 + 12 +12 + 12 +12 + 12 + 12 + 12( as each lamp is of resistance 12)
Rs = 96 ohm
GOOD LUCK FOR THE FUTURE! :)
An ambulance siren has a frequency of 650 Hz and is moving away from you at 35 m/s. What frequency will you perceive? Use 346 for the speed of sound.
590 Hz is the answer to the question
An ambulance siren has a frequency of 650 Hz and is moving away from you at 35 m/s. What frequency will you perceive? Use 346 for the speed of sound.
Answer:
59.71 Hz
Explanation:
Frequency: 650 Hz
Velocity: 35 m/s
Speed of sound: 346
f = f(v / v + speed of sound)
f = 650(35 / 35 + 346)
Evaluate and you would perceive a frequency of 59.71 Hz
need help please and
In what respect is the universal law of gravitation similar to Einstein's view of gravity in his general theory of relativity?
•Gravity is an attractive force.
•The mass of an object affects gravity.
•The distance between objects affects gravity.
Answer:
The mass of an object affects gravity.
Explanation:
Answer:
The mass of an object affects gravity.
Explanation:
What do you know about muscular fitness activities?
Answer:
Examples of muscle-strengthening activities include:
lifting weights.
working with resistance bands.
heavy gardening, such as digging and shovelling.
climbing stairs.
hill walking.
cycling.
dance.
push-ups, sit-ups and squats.
Explanation:
What is the speed shown in the graph? which number do i start on?
Answer:
4 m/s
Explanation:
speed = distance/time
speed= 20/5 = 4
similarly for all no. the answer is constant,i.e. 4
A scientist heats a red powder. Upon heating, a liquid and a gas form.
Which type of substance is the red powder?
O A. anion
B. an isotope
O c. an element
O D. a compound
Answer:
Compound
Explanation:
In each of the following cases, determine where the car has no
acceleration ?
1. A car shortly after a stoplight turns green
2. A car approaching a red light
3. A car with the cruise control set at 80 km/h
4. A car turning a curve at a reducing the speed
Help pls
Answer:
1.after
2.approaching
3.cruise
4.turning
Explanation:
if wrong sorry
What is one way that nuclear fusion differs from nuclear fission?
A. Nuclear fusion requires very high pressures and temperatures.
B. Nuclear fusion occurs spontaneously on Earth.
C. Nuclear fusion is used in power plants to produce electricity.
D. Nuclear fusion is used to power aircraft carriers.
Answer:
A. Nuclear fusion requires very high pressures and temperatures.
Explanation:
Nuclear fusion requires very high pressures and temperatures is one way that nuclear fusion differs from nuclear fission. Hence option A is correct.
What is nuclear fusion and fission ?Nuclear fission and fusion processes are the two basic types of nuclear reactions. Nuclear fusion is a process in which two or more light nuclei collide to generate a heavier nucleus. Nuclear fusion occurs in elements with a low atomic number, such as hydrogen. Nuclear fusion is the inverse process of nuclear fission, in which heavy atoms disperse and generate lighter elements. Nuclear fusion and fission both yield enormous amounts of energy.
A nuclear process in which atomic nuclei of low atomic number fuse to generate a heavier nucleus, releasing energy.
Because of nuclear fusion, every star in the cosmos, including the sun, is alive. They generate massive amounts of heat as a result of this activity.
Fission is a nuclear process that occurs when a heavy nucleus breaks spontaneously or when it collides with another particle, releasing energy. Nuclear fission occurs when the nucleus of an atom breaks into lighter nuclei as a result of a nuclear reaction. This decay can occur naturally as a result of radioactive decay, or it can be replicated in a laboratory by attaining the requisite circumstances (bombarding with neutrinos). The resultant pieces have a lower total mass than the original. In the preceding process, the missing mass is turned into nuclear energy.
Hence option A is correct. it requires high pressure and high temperature and it occurs in sun.
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