Answer:
your answer is 21 n
Explanation:
Which of the following is an example of rolling friction?
O your shoes on a sidewalk as you walk
O bike tires on the road as you ride
a boat on the water as it sails
O two hands rubbing together
Answer:
O bike tires on the road as you ride
Explanation:
is the rolling friction
Answer:
B. Bike tires on the road as you ride
Explanation:
Please give brainliest!
HELP please!!!!!!!!!!!!!!!
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
need help please and
A student used three appliances in her dormitory room: a 1,200-watt iron, which she uses 3.5 hours per month: a lamp with a 100-watt bulb she uses 125 hours per month; and a 700-watt coffee maker, which she uses 15 hours month hours per month
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.
Learn more about momentum here: https://brainly.com/question/7973509
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
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
PLS HELP ASAP WILL GIVE BRAINLIEST
Look at the figure below:
If sin y° = 9/c and tan y° = 9/d, what is the value of cos y°?
Answer:
hope this is what u want
hope it helps u
Explanation:
don't mind my handwriting I wrote it as fast as I could
what is SI unit of Meter
Answer:
There is not such thing as SI unit of meter
Meter is SI unit for length
A ball rolling at a speed of 4.30 m/s has a kinetic energy of 23.1 J. What is the mass of the ball?
PLEASE HELP
Answer:
Mass = 2.50 kilograms.
Explanation:
Given the following data;
Velocity = 4.3m/s
Kinetic energy = 23.1J
To find the mass of the ball;
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Substituting into the equation, we have
23.1 = ½m*4.3²
46.2 = 18.49m
Mass, m = 46.2/18.49
Mass, m = 2.498 ≈ 2.50kg
PLEASE HELP PLEASEEEE
Answer:
Concave mirror
Explanation:
Because as we move the object far away from the mirror the image gets inverted
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
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
PLS ANSWER FAST WILL GIVE BRAINLY!!!! ONLY IF YOU KNOW!!!
Fill in the blanks
Iron has 26 protons, 26 electrons and an atomic mass of 56. How many neutrons are in iron?
Answer:
30 neutrons
Explanation:
A neutral iron atom contains 26 protons and 30 neutrons plus 26 electrons in four different shells around the nucleus. As with other transition metals, a variable number of electrons from iron's two outermost shells are available to combine with other elements.
A friend of yours left a pile of mail on a table. You notice your favorite magazine sticking out from under a package. You grab the magazine by its corner and get it from under the package. As you get your magazine, the package does not topple because
A- it has no acceleration
B-the force of gravity keeps it secured
C-it has inertia
D- a pair of action-reaction forces act on it
Answer:
d or b i think
Explanation:
i looked it up on go ogle :)
Answer:
b
Explanation:
sounds like it should be right
A wave sent out from a source is reflected back
in 1x10 -3 sec. If the velocity of the wave
is 3x 10²m/s what is the distance of the reflecting
Surface from the source
Answer:
Hdgdjdiehebhsiducggdgdhduudhd
Which element has the greatest number of valence electrons?
A. Sodium (Na)
B. Chlorine (CI)
C. Magnesium (Mg)
D. Silicon (Si)
Answer:
B. Chlorine (CI)
Explanation:
I GUESS I DON'T NEED TO GIVE THE EXPLANATION. CAN I GET SOME REWARDS PLEASE....
THE ANSWER IS: B. Chlorine (CI)
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
what is the gain in gpe when a brick of 2.00 kg is lifted up by 11.5 m
[ HELP NEEDED URGENTLY
Answer:
E = 225.4 J
Explanation:
Given that,
The mass of a brick, m = 2 kg
It is lifted up by 11.5 m
We need to find the gain in gravitational potential energy. The formula for gravitational potential energy is given by :
[tex]E=mgh\\\\E=2\times 9.8\times 11.5\\\\E=225.4\ J[/tex]
So, the gain in gravitational potential energy is 225.4 J.
write the ratio of the following?
CaCO3
C2H6
Fe(NO3)3
Answer:
C2H6 up the road to be with its own in
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:
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! :)
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
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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https://brainly.com/question/862972
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does Bart Allen from the young justice show like men cause some one told me that watching season 3 and is the flash a bad guy for going back in time
Answer:
no
Explanation:
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).
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
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.
To know more about fusion reaction :
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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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