Tryout Tka Saintek #1

Cendana memiliki kayu yang harum karena batangnya mengandung minyak atsiri yang berbau harum. Minyak atsiri merupakan senyawa yang terdapat dalam berbagai tumbuhan dan memiliki aroma yang khas. Pada cendana, minyak atsiri tersebut terkandung dalam batangnya, sehingga memberikan aroma harum pada kayu cendana.

Cendana memiliki kayu yang harum karena batangnya mengandung minyak atsiri yang berbau harum. Minyak atsiri adalah senyawa yang memberikan aroma khas pada tumbuhan.

Pada gambar di atas, bagian yang menghasilkan energi untuk pergerakan sperma adalah C.

The inhibition of plant growth occurs due to the production of a hormone called abscisic acid.

Euglena is a protist that can be classified as both autotrophic and heterotrophic. It has the ability to perform photosynthesis and produce its own food using sunlight, similar to plants. However, when sunlight is not available, Euglena can switch to a heterotrophic mode and obtain nutrients by ingesting organic matter from its environment. This unique ability to switch between autotrophy and heterotrophy allows Euglena to survive in various environmental conditions.

The correct answer is 1, 3, 4. This is because the characteristics of breathing with gills (insang), having two shells (cangkang), and having nephridia (nefridia) are all traits of the class Pelecypoda. Tentacles (tentakel) and moving with the stomach (bergerak dengan perut) are not specific characteristics of this class.

The radius of the larger circle is 6, so its diameter is 12. The diameter of the smaller circle is the line connecting the two points where the circles intersect. This diameter has a length of 12.
The area of the smaller circle can be calculated using the formula A = πr^2, where r is the radius. Substituting the given radius of 3√2 into the formula, we get A = 18π.
The area of the intersection between the two circles can be calculated by subtracting the area of the smaller circle from the area of the larger circle. Therefore, the area of the intersection is 18π - 18.

The period of the planet's orbit is given as 27 years. The period of an orbit is the time it takes for the planet to complete one full revolution around the sun. The semi-major axis of an orbit is half the length of the longest diameter of the elliptical orbit. In this case, it is stated that the semi-major axis is N times the distance between the earth and the sun. Since the period of the orbit is directly related to the length of the semi-major axis, a longer semi-major axis would result in a longer period. Therefore, if the period is 27 years, the value of N must be 9.

Lamarck's theory states that in the past, giraffes had short necks, but due to the increasing height of the plants they ate, their necks became longer and this trait was passed on to their offspring. This explanation aligns with Lamarck's belief in the inheritance of acquired characteristics, where an organism can change its traits during its lifetime in response to its environment and pass on those changes to its offspring.

Lingkaran tahun pada batang pohon sering digunakan sebagai ukuran dalam menentukan umur suatu pohon. Lingkaran tahun sebenarnya merupakan jaringan yang tersusun atas xilem sekunder. Xilem sekunder adalah lapisan kayu yang terbentuk dari pertumbuhan sekunder pada batang pohon. Setiap tahun, pohon akan membentuk satu lingkaran baru dari xilem sekunder yang lebih tebal. Dengan demikian, jumlah lingkaran tahun pada batang pohon dapat digunakan untuk mengestimasi umur pohon tersebut.

The molecular formula of a compound is determined by the ratio of the number of atoms of each element present in the compound. In this case, the compound contains 40% of element X and 60% of element Y. Since the atomic masses of X and Y are given as 32 and 16 respectively, we can calculate the number of moles of each element present in the compound. By dividing the number of moles of each element by the smallest number of moles, we find that the ratio is 1:3, indicating that the compound has 1 atom of X and 3 atoms of Y. Therefore, the molecular formula of the compound is XY3.

The correct answer is 96500 C. This is because 1F (Faraday) is equal to 96500 C/mol elektron. Since the question states that 5.6 L of oxygen gas is produced, we can assume that this is the product of the electrolysis of water. From the balanced equation for the electrolysis of water, we know that 4 moles of electrons are required to produce 1 mole of oxygen gas. Therefore, the total charge required is 4 times the charge of 1 mole of electrons, which is 4 * 96500 C = 386000 C. However, since the question asks for the charge required for 5.6 L of oxygen gas, we need to adjust the value accordingly. The molar volume of a gas at STP is 22.4 L/mol, so the charge required for 5.6 L of oxygen gas is (5.6/22.4) * 386000 C = 96500 C.

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The given information states that there are 19 chromosomes in the micrograph and each chromosome consists of one chromatid. This indicates that the micrograph was taken during the final stage of cytokinesis in meiosis II. During cytokinesis, the cytoplasm divides, resulting in the separation of the two daughter cells. In meiosis II, the sister chromatids separate, resulting in the formation of four haploid daughter cells. Therefore, the correct answer is "akhir sitokinesis pada meiosis II" (the final stage of cytokinesis in meiosis II).

The correct answer is 2 because when we solve the inequality |2x - 16| < |x - 2| < 11, we find that x = 2 satisfies the inequality. Any other prime numbers do not satisfy the inequality.

When an object is at temperature T, it emits thermal radiation with a range of wavelengths. The wavelength at which the radiation has maximum intensity is given by Wien's displacement law, which states that the wavelength is inversely proportional to the temperature. Therefore, when the temperature is increased to 2T, the wavelength at which the radiation has maximum intensity will be halved, resulting in a wavelength of 290 micrometers.

The question states that a certain amount of heat is absorbed by ice with a mass of 2 kg and a temperature of -10°C. The specific heat capacity of ice is given as 2000 J/kg°C. After thermal equilibrium is reached, 0.6 kg of water is formed and the heat of fusion of ice is 340 kJ/kg. To find the amount of heat absorbed, we can use the formula Q = mcΔT, where Q is the heat absorbed, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. In this case, the change in temperature is -10°C, so we have Q = (2 kg)(2000 J/kg°C)(-10°C) = -40,000 J. Since the question asks for the answer in kJ, we convert -40,000 J to kJ by dividing by 1000, giving us -40 kJ. However, since heat is being absorbed, we take the absolute value of -40 kJ, which is 40 kJ. Therefore, the correct answer is 40 kJ.

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Giberelin adalah hormon yang berperan dalam proses pembungaan pada tumbuhan. Hormon ini mempengaruhi pertumbuhan batang dan daun serta memicu pembentukan bunga dan buah. Giberelin juga dapat mempengaruhi pertumbuhan dan perkembangan biji serta mempengaruhi pembentukan akar. Dengan demikian, giberelin merupakan hormon yang penting dalam mengatur proses pembungaan pada tumbuhan.

The given information states that vector c is equal to vector a minus vector b. We are also given the magnitudes of vectors b and c, which are 8 and 3 respectively. Additionally, we are given the magnitude of vector a, which is 7, and the angle gamma, which is 120 degrees. To find the sine of angle alpha, we can use the formula sin(alpha) = |c| / |a|. Substituting the given values, we get sin(alpha) = 3 / 7. Simplifying this further, we get sin(alpha) = 3 * sqrt(3) / 14, which matches the given answer of 3 * sqrt(3) / 14.

The question provides information about the remainders when dividing two polynomials by (x-1) and (x-3) respectively. The remainder when dividing p(x) by (x-1) is 55, and the remainder when dividing q(x) by (x-3) is 19. We need to find the value of c - b.

To find this, we can use the Remainder Theorem. According to the Remainder Theorem, if a polynomial f(x) is divided by (x-a), the remainder is equal to f(a).

So, when we divide p(x) by (x-1), the remainder is equal to p(1), which is 55. Similarly, when we divide q(x) by (x-3), the remainder is equal to q(3), which is 19.

Using this information, we can set up two equations:
p(1) = 55
q(3) = 19

From the equation p(1) = 55, we can substitute x = 1 into p(x) = x^3 - 2bx^2 + c to get:
1^3 - 2b(1)^2 + c = 55
1 - 2b + c = 55

From the equation q(3) = 19, we can substitute x = 3 into q(x) = bx^2 - cx + 1 to get:
b(3)^2 - c(3) + 1 = 19
9b - 3c + 1 = 19

Now we have a system of equations:
1 - 2b + c = 55
9b - 3c + 1 = 19

Solving this system of equations, we find that b = 5 and c = 10.

Therefore, c - b = 10 - 5 = 5.

Hence, the correct answer is 5.

Pada saat di A, sebagian gelombang diteruskan dan sebagian gelombang dipantulkan. Hal ini terjadi karena saat gelombang mencapai titik A, terjadi perubahan medium dari tali yang tipis ke tali yang lebih tebal. Sebagian gelombang akan terus bergerak ke tali yang lebih tebal dan melanjutkan perjalanannya, sedangkan sebagian gelombang akan dipantulkan kembali ke tali tipis dengan fase yang sama dengan gelombang yang datang.

The force of friction can be calculated using the equation F_friction = μ * F_normal, where μ is the coefficient of friction and F_normal is the normal force. In this case, the normal force is equal to the weight of the cabinet, which is 300 N. The coefficient of kinetic friction is given as 0.4, so the force of kinetic friction is 0.4 * 300 N = 120 N. The net force acting on the cabinet is the difference between the force pulling the cabinet (150 N) and the force of kinetic friction (120 N), which is 150 N - 120 N = 30 N. The acceleration can be calculated using the equation F_net = m * a, where F_net is the net force and m is the mass of the cabinet. Since the mass is not given, we can use the equation F_net = m * g, where g is the acceleration due to gravity. Rearranging the equation, we get a = F_net / g = 30 N / 10 m/s^2 = 3 m/s^2. Therefore, the acceleration of the cabinet is 3 m/s^2 and the force pulling the cabinet is 150 N.

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The correct answer is 123. The question provides information about the amount of solute (0.8 g) and the volume of solvent (300 mL). Using this information, we can calculate the molarity of the solution. Then, using the ideal gas law equation for osmotic pressure, we can calculate the molar mass of the solute. The molar mass is found to be 123 g/mol.

According to Le Chatelier's principle, when the pressure of a system at equilibrium is decreased, the equilibrium will shift in the direction that produces more moles of gas. In this case, decreasing the pressure of CO2 gas by 0.05 atm will cause the equilibrium to shift to the right, towards the formation of more CO2 gas, in order to increase the pressure back to its original value. Therefore, the correct answer is "kesetimbangan bergeser ke kanan, jika tekanan gas CO2 dikurangi 0,05 atm".

The molar ratio between MO2 and O2 in the balanced equation is 1:1. Therefore, if 2.39 g of MO2 produces 112 mL of O2 gas, we can calculate the molar mass of MO2.

First, we convert the volume of O2 gas to moles using the ideal gas law:
112 mL * (1 L/1000 mL) * (1 mol/22.4 L) = 0.005 mol

Next, we calculate the molar mass of MO2:
Molar mass = mass/moles
Molar mass = 2.39 g/0.005 mol = 478 g/mol

Since MO2 is a compound containing one M atom, the molar mass of M is 478 g/mol.

However, the question asks for the atomic mass (Ar) of M, so we need to divide the molar mass by the number of M atoms in one MO2 molecule. Since MO2 contains one M atom, the Ar of M is 478 g/mol divided by 1, which is equal to 478 g/mol.

Since the Ar of M is 478 g/mol, the correct answer is 478.

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The given question provides information about a circuit with a sinusoidal alternating current source, a resistor, and a capacitor connected in series. The voltage amplitude of the current source is 200 V, and the angular frequency is 25 Hz. The resistor has a resistance of 200 Ω, and the capacitor has a capacitance of 100/π μF. To find the current flowing through the capacitor, we can use the formula I = V/Z, where I is the current, V is the voltage, and Z is the impedance. The impedance of a capacitor is given by Z = 1/(ωC), where ω is the angular frequency and C is the capacitance. Substituting the given values, we can calculate the impedance and then find the current. The correct answer is 1/2√2A.

The correct answer is B and D. In flowers, the parts that attract pollinating insects are the petals and the stamen. The petals are usually brightly colored and scented to attract insects, while the stamen produces pollen which is essential for pollination. Therefore, the combination of B (petals) and D (stamen) is the correct answer as they are the parts of the flower that specifically attract pollinating insects.

The equation of one of the asymptotes of the hyperbola can be found using the formula: x - h = ±(a/b)(y - k), where (h,k) is the center of the hyperbola and a and b are the distances from the center to the vertices along the x and y axes respectively. In this case, the center is (0,0) and the distance from the center to the vertex along the x axis is 4. Therefore, the equation of the asymptote is 4x - 3y = 0, which can be simplified to 3x - 4y = 0. Since the given equation is 3x - 4y = -3, it is the equation of one of the asymptotes.

The balanced equation shows that 1 mole of CaC2 reacts with 2 moles of H2O to produce 1 mole of C2H2. Since the molar mass of CaC2 is 64 g/mol, 1 mole of CaC2 weighs 64 grams.

To find the amount of CaC2 needed for 4 hours of illumination, we can use the stoichiometry of the reaction.

1 mole of C2H2 produces 112 L of gas at STP, so 1 mole of CaC2 is needed to produce 112 L of C2H2.

Therefore, for 4 hours of illumination, 4 moles of CaC2 is needed.

4 moles of CaC2 is equal to 4 x 64 g = 256 g = 0.256 kg.

So, the correct answer is 0.256 kg, which is closest to 0.32 kg.

Molekul sukrosa harus dipindahkan dari bagian B ke bagian C.

Atom karbon (C) dalam molekul benzena membentuk ikatan dengan atom karbon lainnya menggunakan orbital hibrida sp2. Dalam hibridisasi sp2, satu orbital s dan dua orbital p pada atom karbon bergabung untuk membentuk tiga orbital hibrida sp2 yang memiliki bentuk planar trigonal. Tiga orbital hibrida sp2 ini akan berikatan dengan tiga orbital p pada atom karbon lainnya dalam molekul benzena, membentuk ikatan sigma dan ikatan pi yang membentuk struktur cincin benzena yang datar.

The correct answer is that the Hepatitis B virus is not considered a living organism. This is because viruses lack essential characteristics of living organisms, such as the ability to reproduce on their own and carry out metabolic processes. Instead, viruses rely on host cells to reproduce and carry out their life cycle.

The correct answer is 0,60 c. This answer is obtained by using the formula for relativistic length contraction. The length contraction formula states that the length of an object moving at a relativistic speed is contracted in the direction of motion. In this case, the length of the triangle is contracted due to the motion of the airplane. By using the given information about the length of the triangle and the angle it forms with the horizontal plane, we can calculate the velocity of the airplane using the length contraction formula. The calculated velocity is 0.60 times the speed of light.

The correct answer is II because the neuron labeled II is responsible for transmitting stimuli from the sensory organs to the brain. Neurons I, III, and IV may have other functions, but they are not specifically involved in transmitting sensory stimuli to the brain.

Due to the friction between the block and the flat surface, the spring loses one-fourth of its mechanical energy for each oscillation period. After completing three oscillations, the spring would have lost three-fourths of its initial energy. The maximum displacement of the spring is directly proportional to the square root of its initial energy. Therefore, the maximum displacement of the spring would be 3/4 times the square root of its initial displacement, which is equal to 3/8 times the square root of 3 times A.

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The correct answer is that the velocity of the stone at t = 4 seconds is -12 m/s. This can be determined by looking at the graph provided. The graph shows that the stone is thrown upwards with an initial velocity of 25 m/s. As time passes, the velocity decreases due to the force of gravity. At t = 4 seconds, the stone has reached its maximum height and is starting to fall back down. The negative velocity indicates that the stone is moving downwards. Therefore, the correct answer is that the velocity at t = 4 seconds is -12 m/s.

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At a certain temperature, the solubility product constants (Ksp) for PbSO4 and PbI2 are given. The Ksp value represents the equilibrium constant for the dissolution of a sparingly soluble salt. A higher Ksp value indicates a higher solubility of the salt. In this case, the Ksp value for PbI2 (7.1 × 10-9) is smaller than the Ksp value for PbSO4 (1.6 × 10-8). Therefore, the solubility of PbI2 is greater than the solubility of PbSO4 at this temperature.

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The maximum current induced in the AC generator can be calculated using the formula:

I = BANf

Where:
I = Maximum current induced
B = Magnetic field strength (2 Tesla)
A = Area of the coil (0.05 m^2)
N = Number of turns in the coil (100)
f = Frequency of the rotation (50 Hz)

Plugging in the given values into the formula:

I = (2 Tesla) * (0.05 m^2) * (100 turns) * (50 Hz)
I = 31,400 A

Therefore, the correct answer is 31,400 A.

After the collision, the first marble will experience a change in velocity in the x-direction. Since the second marble was initially at rest, the change in velocity of the first marble in the x-direction will be equal to its initial velocity in the x-direction. Since the initial velocity of the first marble is v and the final velocity is v'1, and the angle between the x-axis and the final velocity is 60°, we can use trigonometry to find the x-component of the change in velocity. The x-component of the change in velocity is given by v'1 * cos(60°). Therefore, the x-component of the impulse is -1/2 mv.

The correct statement about the classification of microorganisms is that the hepatitis B virus is not included as a living organism. This is because viruses are considered acellular entities that cannot carry out metabolic processes or reproduce on their own. They are instead classified as infectious agents that require a host cell to replicate and cause disease.

The correct answer is 2 (10√2 - 1). This can be explained by using the compound interest formula, which states that the final amount A is equal to the initial amount P multiplied by (1 + r/n)^(nt), where r is the interest rate per period, n is the number of compounding periods per year, and t is the number of years. In this case, the amount doubles in 5 years, so (1 + r/n)^(nt) = 2. Solving for r/n, we get r/n = 10√2 - 1. Since the question asks for the interest rate per year, we multiply r/n by n to get the final answer of 2 (10√2 - 1).