Answer:
Urinary System
Explanation:
Answer:
Excretory system.
explanation:
Why are the voice of men women and children different??
We each have a unique voice because so many factors work together to produce that voice. As air passes over them, the vocal cords vibrate very quickly to produce sounds. The higher the rate of vibration, called frequency, the higher the pitch will be.
What 3 factors should be considered when designing a lighting rod?
Explanation:
A lightning rod (US, AUS) If lightning hits the structure:-
It will preferentially strike the rod and be conducted to ground through a wire.
Instead of passing through the structure, where it could start a fire or cause electrocution.
The parts of a lightning protection system are air terminals (lightning rods or strike) and all of the connectors and supports to complete the system.
Which phenomena support only the particle theory of light? Check all that apply.
O reflection
bending around objects
O traveling in a straight path
O interference
O photoelectric effect
Assuming the time lapse indicated by the double arrow is 2s, what are the values of the
wave frequencies f1 and f2 in the figure? (Hint: Use the definition of frequency).
Answer:
f₁ = 1 Hz
f₂ = 0.75 Hz
Explanation:
The given time lapse between the two frequencies, t = 2 s
The frequency of a wave is the number of complete one cycles of the wave that pass through a given point in a given unit of time
The unit of frequency, 'f', is the Hertz, Hz
Therefore, frequency = Number of cycles/(Time)
The frequency of a wave, f = n/t
Where;
n = The number of completed cycles in a given time
The frequency of the first wave 1, f₁
The number of complete cycles by wave 1 in the 2 seconds, n = 2 cycles
The time, t = 2 seconds
The frequency of wave 1, f₁ = 2 cycles/(2 seconds) = 1 cycle/second = 1 Hz
The frequency of the second wave, wave 2, f₂
The number of complete cycles by wave 2 in the 2 seconds, n = 1 and half cycles = 1.5 cycles
The time, t = 2 seconds
The frequency of wave 2, f₂ = 1.5 cycles/(2 seconds) = 0.75 cycle/second = 0.75 Hz
What is the sentence that we use to
remember how to convert metric
prefixes?
Answer:
The mnemonic I can use to memorize the metric prefixes in this order is: Gigantic Monsters Killed One Million Men Napping Peacefully. All right, so again, gigantic monsters killed one million men napping peacefully.
HELP ME OUT PLEASE!! a vector is represented by a straight line in such a way that its length indicates_______and arrow-head indicates_________of the vector.
Answer:
The magnitude and the direction of the vector.
Explanation:
The length of the vector is its magnitude and arrow head shows the direction of the vector.
which of the following refers to stored energy that an object has due to its position?
Explanation:
Energy stored in an object due to its position is Potential Energy. Energy that a moving object has due to its motion is Kinetic Energy.
Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is?
Answer:
Draw the vector triangle (head to tail)
Let 8 be adjacent and 4 the opposite side
tan theta = 4 / 8 = .5
theta = 26.6 deg
Por una resistencia de 10 Ω fluyen 5A. ¿Cuál será la diferencia de potencial que se le debe aplicar a la resistencia?
Answer:
V = 50 volts
Explanation:
Given that,
Resistance, R = 10 ohms
Current, I = 5 A
We need to find the potential difference across the circuit. We know that,
V = IR
Put all the values,
V = 5 × 10
V = 50 volts
Hence, the potential difference is equal to 50 volts.
A 500 kg sports car accelerates uniformly from rest reaching a speed of 30 m/s in 6 seconds .Find the distance travelled by the car in 6 second
Answer:
the distance traveled by the sports car is 90 m
Explanation:
Given;
mass of the sports car, m = 500 kg
initial velocity of the sports car, u = 0
final velocity of the sport car, v = 30 m/s
time of motion of the car, t = 6 s
The distance traveled by the sports car is calculated as;
[tex]s = (\frac{u+v}{2} )t\\\\s = (\frac{0+30}{2} ) \times 6\\\\s = 15 \times 6\\\\s = 90 \ m[/tex]
Therefore, the distance traveled by the sports car is 90 m
What is gravitational force??
Answer:
the force of attraction between all masses in the universe
Explanation:
Have a nice day :)
Se conecta una pila de 1.5 volt a una luz led de color rojo, el led se enciende mientras esté conectado a la pila. De esta stuación se afirma que:
Answer:
Se requiere corriente para que brille la luz.
Explicación:
Una batería de 1,5 voltios está conectada a una luz LED roja, el LED se enciende siempre que esté conectado a la batería. A partir de esta situación se afirma que se requiere corriente para que brille la luz. La batería tiene corriente eléctrica almacenada que permite que la luz brille hasta que la corriente eléctrica esté presente en la batería. Esta batería se puede cargar durante un período de tiempo cuando está llena, se puede recuperar durante muchas horas.
in The unit of power is a
derived unite
The unit of power is
a derived unit be con
CAY
Answer:
Watts
Explanation:
The SI unit for power is the watt (W), where 1 watt equals 1 joule/second (1 W=1 J/s).
Explain how land breeze and sea breezes occur?
Explanation:
during the daytime the land gets hot and the hot air blows up to the sky and to feel the space the cool you are from the Sea blows to the land this phenomenon is called sea breeze similarly at night the hot air of sea goes up n cool air from land blows to sea which is called land breexe
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How long would a 2950 N force need to act to cause a 6000 kg delivery truck to accelerate from 4.0m/s to 29.0m/s?
Answer:
Time, t = 50.8 seconds.
Explanation:
Given the following data;
Mass = 6000 kg
Force = 2950 N
Initial velocity = 4 m/s
Final velocity = 29 m/s
To find time;
First of all, we would determine the acceleration of the truck using the following formula;
Force = mass * acceleration
2950 = 6000 * acceleration
Acceleration = 2950/6000
Acceleration = 0.492 m/s²
Next, we find time using the first equation of motion;
[tex] V = U + at[/tex]
Where;
V is the final velocity.
U is the initial velocity.
a is the acceleration.
t is the time measured in seconds.
Making time, t the subject of formula, we have;
[tex] t = \frac{V - U}{a}[/tex]
Substituting into the equation, we have;
[tex] t = \frac{29 - 4}{0.492}[/tex]
[tex] t = \frac{25}{0.492}[/tex]
Time, t = 50.8 seconds.
A body of mass 0.1kg tied by a string is rotating a vertical circle with a speed of 10 m/s of radius a 1 m . what is the tension experienced by the string at the highest point
Answer:
The tension experienced in the string at the highest point is approximately 9.019 Newtons
Explanation:
The mass of the body tied to the string, m = 0.1 kg
The path of motion of the mass = Vertical circular motion
The speed of rotation of the stone, v = 10 m/s
The radius of the circular motion path, r = 1 m
The required information = The tension at the highest point, T
At the highest point, the tension, 'T', comprises of the centrifugal force, 'F', acting upwards in the string and the weight, 'W' of the body acting downwards
∴ T = F - W
[tex]The \ centrifugal \ force, \ F = \dfrac{m \times v^2}{r}[/tex]
Weight, W = m × g
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
Therefore;
The centrifugal force, F = 0.1 kg × (10 m/s)²/(1 m) = 10 N
The weight of the mass tied to the string, W ≈ 0.1 kg × 9.81 m/s² = 0.981 N
From which we have;
T = 10 N - 0.981 N = 9.019 N
The tension experienced in the string at the highest point ≈ 9.019 Newtons
Una pelota q rodaba a 93,6 dm/s, luego de 14,4 segundos se detiene.¿cual fue el valor de su aceleracion?
Answer:
-6,5 ms ^ 2
Explanation:
Dado que;
Velocidad inicial (u) = 93,6 m / s
Velocidad final (v) = 0 m / s
aceleración (a) =?
tiempo empleado (t) = 14,4 segundos
De;
v = u + en
0 = 93,6 + 14,4a
a = -93,6 / 14,4
a = -6,5 ms ^ 2
Atoms of two different elements must have different
electrical charges.
numbers of neutrons.
atomic numbers.
energy levels
Answer:
Number of neautrons
Explanation:
Atoms from two different elements may have the same number of neutrons, but never the same number of protons. The number of protons is unique to the element and represents the atomic number. (sorcastic.org)
Answer:
C.
Explanation:
suppose you were pushing on a heavy bucket of stones it 100 N of force, and it did not move. How many newtons of force would be balancing the force you were applying?
Answer:
100N
Explanation:
the limiting frictional force acts in the opposite direction and is equal to the force applied
frictional force=100N
Suppose if we were pushing on a heavy bucket of stones it 100 N of force, and it did not move then 100 Newtons of force would be balancing the force that we were applying.
What is friction?Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.
The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.
The limiting friction is the frictional force which comes into play when the object is just about to move due to the effect of the externally applied force, limiting frictional force balance the externally applied force up to a state when the object does not move.
The value of friction force also depends on the coefficient of friction which depends on the roughness of the surface, the coefficient of the limiting friction is less than that of the coefficient of the kinetic friction.
As given in the problem statement that supposes if we were pushing on a heavy bucket of stones it 100 N of force, and it did not move then 100 Newtons of force would be balancing the force that we were applying because of the limiting friction.
Learn more about friction from here link given below
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what is force??????
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
Answer:
A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. ... Forces only exist as a result of an interaction.
Is the path of light visible in a Suspension? Give reason.
Answer:
Answer:It is due to tyndall effect that the path of a light ray passing through a suspension is visible. The particles in suspension scatter the beam of light making it clearly visible.
Answer:
it is due to the Tyndall effect so the path of light is visible in a suspension but in solution the path of light is not visible
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What is space expanding?
Answer:
The idea behind space expansion is that after the big bang, the universe started infinitely expanding. It's also called metric expansion. Stephen Hawking's A Brief History of Time goes further into detail on this.
calcula el peso de una persona que viaja a la luna cuya masa es de 105 kg
Answer:
W = 170.62 N
Explanation:
The given question is, "calculate the weight of a person traveling to the moon whose mass is 105 kg".
We need to find the weight of a person on the Moon.
The weight of an object is given by :
W = mg
Where
g is acceleration due to gravity on Moon, g = 1.625 m/s2
W = 105 kg × 1.625 m/s²
W = 170.62 N
Hence, the weight of the person is 170.62 N.
which planet has a "great red spot"
the answer is Jupiter
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Two sunbathers were sitting on a raft. One noted that the raft bobbed up and down at a frequency of 0.20 Hz. The other observed that a crest took 5.0 s to cover the 15.0 m to shore. How far apart are the crests of the wave?
Answer:
15 m
Explanation:
We'll begin by calculating the speed of the wave. This can be obtained as follow:
Time = 5 s
Distance = 15 m
Speed =?
Speed = distance / time
Speed = 15 / 5
Speed = 3 m/s
Finally, we shall determine the distance between the crests of the wave. This can be obtained as follow:
Speed (v) = 3 m/s
Frequency (f) = 0.2 Hz
Distance between the crest (λ) =?
v = λf
3 = λ × 0.2
Divide both side by 0.2
λ = 3 / 0.2
λ = 15 m
Therefore, the distance between the crests of the wave is 15 m
A small, uncharged metal sphere is placed near a larger, negatively charged sphere. Which diagram best represents the charge distribution on the smaller sphere
Answer:
Answer is option 3 or
Explanation:
Diagram 2 best represents the charge distribution on the smaller sphere. Therefore, the correct option is option 2.
What is charge?Charge is a physical attribute that causes matter in such an electromagnetic field to experience a force. Electric charges can be either positive or negative.
If there is no net electric charge, the substance is termed neutral or uncharged. Like charges repel each other (for example, two positive charges repelling two negative charges). Charges with opposing charges (positively and negatively) attract each other. Diagram 2 best represents the charge distribution on the smaller sphere.
Therefore, the correct option is option 2.
To know more about charge, here:
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what part of an electric motor transforms electrical energy into mechanical energy
Answer:
Explanation: a
[Assume g = 10m/s?] If a girl is running along a straight road with a uniform velocity 1.5 m/s, find her acceleration. (Ans: 0) a.
Answer:
Her acceleration is 0 m/s²
Explanation:
We note that the motion of the girl is on a straight road, therefore;
The vertical acceleration (e.g. due to gravity, g) on the horizontal motion = 0
The horizontal acceleration, a = (Change in velocity, Δv)/(Change in time, Δt)
For uniform velocity, the change in velocity, Δv = 0
Therefore, fore any change in time, Δt, we have;
a = Δv/Δt
Her acceleration, a = 0/Δt = 0
Her acceleration, a = 0 m/s²
velocity after 2 seconds?
I assume the units are wrong: a = 2 m/s/s, not 2 m/s.
That means the each second, speed increases by 2 m/s. So, after 1 second, it’s going 2 m/s and after 2 seconds, it’s going 4 m/s. As long as the acceleration continued, each seconds would result in a gain of 2 m/s. You could just plug this into:
Vf = Vi + at.
Thus, Vi = 0 and Vf = 4 m/s.
The average speed during these 2 seconds is the average of initial and final speeds:
Vavg = (0 + 4)/2 = 2 m/s
The means that during these 2 seconds, on AVERAGE the bus was going 2 m each second. During the first second, it was going slower than 2 m/s and during the last second it was going faster than 2 m/s, but on AVERAGE, it was going 2 m each second. This is 2m + 2m = 4 m.
You could just plug the numbers into an equation:
X = Vi x t + 1/2 at^2 = 0 + 1/2 x 2 x 2^2 = 0 + 4 = 4 m
So, in conclusion:
the units needed to be corrected
Vf = 2 m/s (this is speed, which is the AMOUNT of velocity, since velocity requires a direction)
Distance = 4 m
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For its size, the common flea is one of the most accomplished jumpers in the animal world. A 2.50-mm-long, 0.460 mg flea can reach a height of 15.0 cm in a single leap. a) Calculate the kinetic energy per kilogram of mass. b) If a 79.0 kg, 2.00-m-tall human could jump to the same height compared with his length as the flea jumps compared with its length, how high could the human jump
Answer:
1.47 J/kg
120 m
Explanation:
The maximum height it can jump in a single leap 15 cm, = 0.15 m
to get the kinetic energy per kg of mass, we need to find the takeoff speed. The take off speed can be calculated by using the formula
v = [tex]\sqrt{2gh}[/tex]
where h = 0.15
v = [tex]\sqrt{2 * 9.81 * 0.15}[/tex]
v = [tex]\sqrt{2.94}[/tex]
v = 1.715 m/s
energy per kg of mass =
1/2 * (1.715) = 1.47 J/Kg
TJe height a human can jump when compared to the flea is
2 m/2.5 mm * 15 cm =
2/0.0025 *0.15 =
800 * 0.15 = 120 m
How far did a crane lift a 65,000 N beam using 2,340,000J of work ?
Answer:
Distance = 36 meters
Explanation:
Given the following data;
Work done = 2,340,000 Joules
Force = 65,000 Newton
To find the distance covered by the crane;
Mathematically, work done is given by the formula;
[tex] Workdone = force * distance[/tex]
Substituting into the formula, we have;
[tex] 2340000 = 65000 * distance [/tex]
[tex] Distance = \frac{2340000}{65000}[/tex]
Distance = 36 meters