Answer:
Average Density = 1.07 g/cm³
Explanation:
The average density of the whole mixture is given by the following formula:
[tex]Average\ Density = \frac{mass\ of\ whole\ mixture}{volume\ of\ whole\ mixture}[/tex]
where,
volume of whole mixture = volume of water + volume of acid
volume of whole mixture = 100 cm³ + 50 cm³ = 150cm³
mass of whole mixture = mass of water + mass of acid
mass of whole mixture = (volume of water)(density of water) + (volume of acid)(density of acid)
mass of whole mixture = (100 cm³)(1 g/cm³) + (50 cm³)(1.2 g/cm³)
mass of whole mixture = 160 g
Therefore,
[tex]Average\ Density = \frac{160\ g}{150\ cm^3}[/tex]
Average Density = 1.07 g/cm³
what is the density of a iphone with a mass of 200g and a volume of 40cm3
All waves travel through a
Group of answer choices
frequency
conductor
medium
wave
The graph of a quadratic function is U-shaped. What is the correct terminology for the graph of a quadratic function?
A.) asymptote
B.) parabola
C.) vertex
D.) intercept
Answer:
B.) parabola
Explanation:
The graph of a quadratic function is a U-shaped curve called a parabola.
Resolver: Una bala de 0.8 de masa se mueve horizontalmente con una velocidad de 30 m/s y se introduce en un bloque de 4kg, inicialmente en reposo. ¿Cuál es la velocidad de la bala y el bloque después del impacto?
Answer:
La velocidad del sistema bala-bloque es 5 metros por segundo.
Explanation:
El enunciado tiene una omisión gramatical. La forma correcta es la siguiente:
Una bala de 0.8 kilogramos de masa se mueve horizontalmente con una velocidad de 30 metros por segundo y se introduce en un bloque de 4 kilogramos, inicialmente en reposo. ¿Cuál es la velocidad de la bala y el bloque después del impacto?
Esta situación es un caso clásico de colisión enteramente inelástica, en donde el sistema bala-bloque no tiene influencia de fuerzas externas, entonces la situación queda descrita por la siguiente ecuación:
[tex]m_{b}\cdot v_{b,o} = (m_{b}+m_{B})\cdot v[/tex] (1)
Donde:
[tex]m_{b}[/tex] - Masa de la bala, en kilogramos.
[tex]v_{b,o}[/tex] - Velocidad inicial de la bala, en metros por segundo.
[tex]m_{B}[/tex] - Masa del bloque, en kilogramos.
[tex]v[/tex] - Velocidad del sistema bala-bloque, en metros por segundo.
Si sabemos que [tex]v_{b,o} = 30\,\frac{m}{s}[/tex], [tex]m_{b} = 0.8\,kg[/tex] y [tex]m_{B} = 4\,kg[/tex], entonces la velocidad del sistema masa-bloque es:
[tex]v = \frac{m_{b}}{m_{b}+m_{B}}\cdot v_{b,o}[/tex]
[tex]v = 5\,\frac{m}{s}[/tex]
La velocidad del sistema bala-bloque es 5 metros por segundo.
A hiking trail is 150 meters long. A mountain lion can run the entire trail in 30 seconds.
How fast does the mountain lion run?
Answer:
5 meters per second
explanation
sana po makatulong
An electric current will always follow
a.
the path of least resistance.
b.
a path toward the north pole.
c.
a path toward the south pole.
d.
the path that leads through insulators.
Answer:
A. The path of least resistance.
Explanation:
ur welcome again ;)
An electric current will always follow the path of least resistance. So, the right option is a.
In inverse relation to the resistance of the pathways, electric current follows every available paths.
The voltage and resistance of the path in the electric circuit affect the amount of electric current that flows through the circuit.
The quantity of electric current flowing through the circuit is inversely proportional to the resistance in the circuit.
Assuming a fixed voltage, the current increases with decreasing resistance. The current decreases in accordance to the level of increasing resistance.
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10. A jogger runs along a road for a distance of 2700 m. If it takes her 900 seconds
to run that distance, what is her speed?
Answer:
Speed = 3 m/s
Explanation:
Given the following data;
Distance = 2700m
Time = 900 s
To find the speed;
Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.
Mathematically, speed is given by the formula;
[tex]Speed = \frac{distance}{time}[/tex]
Substituting into the equation, we have;
[tex]Speed = \frac{2700}{900}[/tex]
Speed = 3 m/s
Joni plays a scale on her clarinet. As she plays from low notes to high notes, what happens to the sound waves that the clarinet creates?
Answer:
The answer is "The frequency of the sound waves increases".
Explanation:
Its most oscillating their frequency waves, therefore higher the vibration we hear. However you see, sound frequency is determined through the oscillation of electrical signals while moving to our ears, which implies that perhaps the audio medium, which usually is air, makes a distinction between compression to spreading. It's the end of the communication as the frequency rises.
Australian Tiger beetles can travel 2.5 m/s. How long would it take a tiger beetle to run the length of a standard football field (109.7 m)?
Answer:
Time = 43.88 seconds
Explanation:
Given the following data;
Speed = 2.5 m/s
Distance = 109.7 m
To find the time it would take to run the length of a standard football field, we would use the following formula;
[tex]Speed = \frac{distance}{time}[/tex]
Making time the subject of formula, we have;
[tex]Time = \frac{distance}{speed}[/tex]
Substituting into the formula, we have;
[tex]Time = \frac{109.7}{2.5}[/tex]
Time = 43.88 seconds
Therefore, it would take a tiger beetle 43.88 seconds to run the length of a standard football.
Describe what happens to a moving object if NO forces are acting on it
Answer:
An object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity. Forces are "pushes" or "pulls" on the object, and forces, like velocity and acceleration are vector quantities.
Explanation:
Can somebody help me with this i cannot learn it online, a walk through would be nice :)
Answer:
1. 5 V
2. A₂ = 1.2 A
Explanation:
1. Determination of the voltage measured at R₃.
Voltage at R₁ (V₁) = 1 V
Voltage at R₂ (V₂) = 6 V
Total voltage (Vₜ) = 12 V
Voltage at R₃ (V₃) =.?
Vₜ = V₁ + V₂ + V₃
12 = 1 + 6 + V₃
12 = 7 + V₃
Collect like terms
12 – 7 = V₃
V₃ = 5 V
Thus, the voltage measured at R₃ is 5 V
2. Determination of A₂.
From the circuit diagram, we can see that the resistors are in series arrangement. This means that the same current will pass through each resistor.
Thus,
A₂ = A₁ = 1.2 A
Although not all snakes are poisonous, all snakes may carry what infection?
a
Rabies
b
Polio
c
Tetanus (or Lockjaw)
d
Lyme's disease
Answer:
C
Explanation:
Not A because mammals cant get rabies. Defenently not polio. I think C is the best answer. Lyme disease is caused by ticks, so no.
If you cause the surfaces between two touching objects to change, how will the friction be affected?
Earthquake waves are 35m long and arrive at a frequency of 2.0Hz. How fast are they travelling?
Answer:
70 m/s
Explanation:
The frequency of earthquake = 2.0 Hz
The wavelength = 35 m
How fastbthw earthquake is t traveling is given bythw velocity of the wave, velocity of wave is related to frequency and wavelength using the formula :
V = frequency * wavelength
V = 2 * 35
V = 70 m/s
Which is a pollutant associated with high-tech gadgets in landfills?
A. Chromium
B. Steel
C. Carbon Dioxide
D. Hydrogen
Answer:
The answer of this is question is A.
Answer:
A.
Explanation:
sana makatulong po ❤❤
An effect analogous to two-slit interference can occur with sound waves, instead of light. In an open field, two speakers placed 1.19 m apart are powered by the same function generator producing sine waves at 1,163 Hz frequency. Assume that the speed of sound is 340 m/s. A student walks along a line 12.5 m away and parallel to the line from one speaker to the other speakers. She hears an alternating pattern of loud and quiet, due to constructive and destructive interference. What is the distance between the central maximum and the first maximum (loud) position along this line in m
Answer:
3.04 m
Explanation:
The interference by diffraction of waves is noticeable only when the dimension of the opening through which the wave is passing through is comparable to the wavelength of the passing wave.
It is given that :
Distance between two speakers, d = 1.19 m
Speed of sound, v = 340 m/s
The frequency is f = 1163 Hz
Distance the student walk along the line of the speaker, D = 12.5 m
We know the wavelength of the sound produced by the speakers is given by :
[tex]$\lambda=\frac{v}{f}$[/tex]
[tex]$=\frac{340}{1163}$[/tex]
= 0.29 m
Now the distance between the central maximum and the first maximum position is given by :
[tex]$y=\frac{\lambda D}{d}$[/tex]
[tex]$=\frac{0.29 \times 12.5}{1.19}$[/tex]
= 3.04 m
What would happen if you went through a black hole. I will give brainliest for a correct answer.
Answer:
You would get spagettified. Streched into a very long noodle version of yourself.
How would an object’s kinetic energy change if it’s mass decreased by a factor of 3 and it moved 6 times faster?
Answer: Decreases in mass cause decreases in kinetic energy due to the aforementioned positive relationship between the two. Therefore when mass is decreased, an increase in kinetic energy is possible if velocity increases.
Answer:: Decreases in mass cause decreases in kinetic energy due to the aforementioned positive relationship between the two.
A person invested
$
8
,
900
$8,900 in an account growing at a rate allowing the money to double every 7 years. How long, to the nearest tenth of a year would it take for the value of the account to reach
$
20
,
600
$20,600?
Answer:
8.5
Explanation:
To the nearest tenth of a year, it would take around 9.1 years when calculate compoundly for the account's worth to reach $20,600.
What is Compound interest?A loan or investment's initial principal as well as any accrued interest from earlier periods are both taken into account when calculating compound interest.
To resolve this issue, we can apply the compound interest formula:
A = P(1 + r/n)nt
where:
A represents the balance of the account after t years.P stands for the initial outlay ($8,900 in this case).The annual interest rate is r, which is unknown.The number n determines how often interest is compounded each year (in this case, once every seven years because the value of the money doubles every seven years).The number of years is t.When A = $20,600, we need to determine t. Since we are aware that the initial investment would double after seven years, we can use the following formula to determine the yearly interest rate:
2 = (1 + r/n)^(nt)
If n is 1/7 (since the investment twice once every 7 years), 2 is the factor by which the investment doubles, and t is an unknown.
When we simplify this equation, we obtain:
t log(1 + r/7) = log(2)
When we solve for r, we get:
r = 7[(2^(1/t))-1]
Now that we have P, r, n, and A, we can enter them into the compound interest formula to find t:
$20,600 = $8,900(1 + r/1)^(1t)
2.318 = (1 + r)^t = log (2.318) / log (one plus r)
t is equal to log(2.318)/log(1 + 7[(2(1/t))-1]).
We can iteratively solve for t using a calculator, beginning with a first guess of 7 years (because the investment doubles every 7 years):
r = 0.0998 and A = $17,800 for t = 7 years
r = 0.0909 and A = $19,397 for t = 8 years.
r = 0.0833 and A = $20,416 for t = 9 years.
r = 0.0823 and A = $20,601 (closest to $20,600) for t = 9.1 years
As a result, it would take the account's value to reach $20,600 in around 9.1 years (to the nearest tenth of a year).
Therefore, when calculated compoundly, it would take approximately 9.1 years for the account's value to reach $20,600, to the nearest tenth of a year.
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True or False: There are many different types of leukocytes.
True
False
why is a screw a kind of inclined plane
Power is the rate at which...........is done or the rate at which........... is converted from one form to another .
Answer:
the answer is c I thought
The mass of an object is 42.8 kg. Calculate the weight on the Earth.
Answer:
428 Newtons
Explanation:
Weight = Mass * Acceleration (due to gravity)
42.8 × 10 =428 N
Explanation:
[tex]weight = mass \times gravitational \: field \: strength[/tex]
gravitational field strength on earth is 9.81m/s²
so weight = 42.8 * 9.81
first to answer gets brainlesit! get it correct.
Answer:
i believe the answer is c
A motorbike accellerates from 15m/s to 25m/s in 15 seconds. How far does thew motrobike trsavel in this time?
Answer:
300 m.
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 15 m/s
Final velocity (v) = 25 m/s
Time (t) = 15 secs
Distance (s) =?
The distance travelled by the motorbike can be obtained as follow:
s = (u + v)t / 2
s = (15 + 25) × 15 / 2
s = 40 × 15 / 2
s = 600 / 2
s = 300 m
Thus, the distance travelled by the motorbike is 300 m.
A 905 kg test car travels around a 3.25 km circular track. if the magnitude of the force that maintains the car's circular motion is 2140 N, what is the car's tangential speed?
how long can trees in the rainforest live?
1) 100 years
2) 250 years
3) 350 years
Answer:
It depends upon the species. Some species do not live as well long, maybe 40 or 50 years for some palm trees, but some can live up to 5000 years, such as the Bristlecone Pine (Pinus longaeva). ×∧×
Explanation:
One type of slingshot can be made from a length of rope and a leather pocket for holding the stone. The stone can be thrown by whirling it rapidly in a horizontal circle and releasing it at the right moment. Such a slingshot is used to throw a stone from the edge of a cliff, the point of release being 25.6 m above the base of the cliff. The stone lands on the ground below the cliff at a point X. The horizontal distance of point X from the base of the cliff (directly beneath the point of release) is 34.4 times the radius of the circle on which the stone is whirled. Determine the angular speed of the stone at the moment of release
Answer:
the angular speed of the stone at the moment of release is 15.05 rad/s
Explanation:
Given the data in the question;
The point of release ( height ) h = 25.6 m
the time of the fall of the stone will be;
⇒√( 2h/g )
we know that g = 9.81 m/s
so we substitute
t = √( (2 × 25.6 m) / 9.81 m/s )
t = √( 51.2 / 9.81 m/s )
t = √( 5.219164 s )
t = 2.285 s
Now, let v represent velocity at the time of release
them v × t ~ v × 2.285 s is the horizontal distance traveled.
Given that; The horizontal distance of point X from the base of the cliff (directly beneath the point of release) is 34.4 times the radius of the circle.
so
v × 2.285 = 34.4 × radius
Now, if the angular speed is ω then velocity at the time of release will be;
v = radius × ω
hence;
(radius × ω) × 2.285 = 34.4 × radius
radius cancels each other out and we have;
ω × 2.285 = 34.4
ω = 34.4 / 2.285
ω = 15.05 rad/s
Therefore, the angular speed of the stone at the moment of release is 15.05 rad/s
During sublimation and deposition, this state of matter is skipped:
A) Solid
B) gas
C) liquid
A burner is placed below the right side of the beaker. Which image shows the motionvof of the liquid that will result? it's a gizmo
Convection cells
Answer:
the second picture
Explanation:
Answer: second picture
Explanation:
(it was right on my gizmo sheet)