Answer:
the force acting on Jennifer is 180 N
Explanation:
The computation of the force acting on Jennifer is shown below:
As we know that
Force = mass × acceleration
= 60 kg × 3 m/s
= 180 N
hence, the force acting on Jennifer is 180 N
We simply applied the above formula
A prokaryotic cell does not have
А
a cell membrane.
B
genetic material.
C
a nucleus.
D
flagella.
Answer:
D
Explanation:
1. Which of the following statements is true about seeds?
a. Every plant produces seeds.
c. All seeds are good to eat.
b. All fruits contain many of seeds. d. all seeds has young plant, stored food and a seed coat.
2. Flowers cannot usually produce seeds unless
a. they are visited by insects.
c. they produce nectar.
b. they are on plants growing in good soil. d. the right pollen is placed on their stigmas.
3. Fertilization take place before a seed develops. Which statement describes when fertilization
occurs?
a pollen grain falls on a pistil
c. sperm in a pollen joins with an egg cell in an ovule
b. a pollen tube enters an ovary
d. an ovary becomes a fruit
4. Which of the following is NOT a factor needed by plants?
a. fire
b. nutrients
Please pasagot po ng tanong ko please
c. sunlight
d. water
5. Which is the reproduction in plants where the male and female parts of the flower are involved?
a. asexual
b. sexual
c. rhizome
d. pollination
Answer:
1 ans: d. all seeds has young plant, stored food and a seed coat.
2 ans: d. the right pollen is placed on their stigmas
3 ans: a. pollen grain falls on a pistil
4 ans: a. fire
5 ans: b. sexual
Hope it helps,
Please mark me as brainliest
Thank you...
What affects both deep water and surface currents in the ocean?
Answer:
These currents are on the ocean's surface and in its depths, flowing both locally and globally. Winds, water density, and tides all drive ocean currents. Coastal and sea floor features influence their location, direction, and speed. Earth's rotation results in the Coriolis effect which also influences ocean currents. -
Answer: The Coriolis effect
Explanation:
(a) Give the H-C-O bond angle in methyl formate H-C-O bond angle methyl formate
(b) One dihedral angle in methyl formate relates the plane containing the O-C- O bonds to the plane y two structures of methyl formate: one in which this dihedral angle containing the Co-onds, identand the other in which it is 180 0° dihedral angle 80" dihedral angle.
Answer:
Explanation:
The bond angle is said to be the angle between two atoms near or around the same atom for a given covalent compound. However, a dihedral angle is known as the angle formed between two planes. Bond angles are usually planar while dihedral angles are interplanar.
The diagram below shows the structure of each compound.
How many moles are in 15.62g of P?
Answer:
[tex]\boxed {\boxed {\sf 0.5043 \ mol \ P}}[/tex]
Explanation:
To convert from moles to grams, we must use the molar mass. This is found on the Periodic Table. Look for Phosphorous or P.
Phosphorus (P): 30.973762 g/molWe can use this number as a ratio.
[tex]\frac{30.973762 \ g \ P }{1 \ mol \ P}[/tex]
Multiply by the given number of grams: 15.62
[tex]15.62 \ g \ P *\frac{30.973762 \ g \ P }{1 \ mol \ P}[/tex]
Flip the fraction so the grams of phosphorus cancel.
[tex]15.62 \ g \ P *\frac{1 \ mol \ P}{30.973762 \ g \ P }[/tex]
[tex]15.62 *\frac{1 \ mol \ P}{30.973762 }[/tex]
[tex]\frac{15.62 \ mol \ P}{30.973762 }[/tex]
Divide.
[tex]0.504297799 \ mol \ P[/tex]
The original measurement of grams has 4 significant figures, so our answer must have the same.
For the number we calculated, that is the ten thousandth place. The 9 in the hundredth thousandth place tells us to round the 2 to a 3.
[tex]0.5043 \ mol \ P[/tex]
There are 0.5043 moles of phosphorus in 15.62 grams.
The charge of a single proton is 1.60 × 10–19 C. What is the nuclear charge of an atom of boron (B)?
Answer:
[tex]q=8\times 10^{-19}\ C[/tex]
Explanation:
Given that,
The charge of a single proton is [tex]1.6\times 10^{-19}\ C[/tex]
There are 5 protons in the nucleus. The nuclear charge of an atom of boron is given by :
[tex]q=5\times 1.6\times 10^{-19}\\\\q=8\times 10^{-19}\ C[/tex]
So, the required charge is [tex]8\times 10^{-19}\ C[/tex].
24. In our experiment, we filled 4 tubes with water and bromothymol blue.
Tube 1 did not contain an organisms, tube 2 contained a snail, tube 3
contained a elodea and tube 4 contained both a snail and elodea. What
tubes could photosynthesis occur in?
O Tubes 3 and 4
O Tubes 2 and 4
O Tubes 2, 3, and 4
Answer:
C. Tubes 2, 3, and 4
Explanation:
Tube one doesn't contain an organism so it can't be that one.
Both a snail and an elodea are considered an organism, cellular respiration occurs in almost any organism's cells.
good luck, i hope this helps :)
ZN + HCI —> ZnCI2+ H2
what is the reaction and is it balanced?
What is the half-life of Technetium-99 if a 200 gram sample decays to 50 grams in 639,000 years?
Answer:
The half-life of Th-232 is 1.4 ∙ 10¹⁰ years.
Is this a balanced equation?
Answer:
The equation is not balanced.
Explanation:
The Law of Conservation of Matter is also called the law of conservation of mass or the Lomonosov-Lavoisier Law. This law postulates that "the mass is neither created nor destroyed, it only transforms." This means that the reactants interact with each other and form new products with different physical and chemical properties than the reactants because the atoms of the substances are arranged differently. But the amount of matter or mass before and after a transformation (chemical reaction) is always the same, that is, the amounts of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends. . In other words, then the mass before the chemical reaction equals the mass after the reaction. The exception to the rule is nuclear reactions, in which it is possible to convert mass into energy and vice versa.
This is, te law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.
Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts.
The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.
By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.
Then, taking into account all of the above, you can determine the amount of elements on each side of the equation:
Left side: 2 hydrogen H and 2 oxygen O
Right side: 2 hydrogen H and 3 oxygen O
Since the quantity of each element is different on each side of the reaction, the equation is not balanced.
The balanced equation is:
2 H₂O₂ → 2 H₂O + O₂
The empirical formulae of a compound is CH2O. The relative formula mass for the molecular formula is 180. What is the molecular formula?
Answer:
ch20 is the empirical formula for glucose , c6h1206 is the molecular formula .
A sample of gas at 3000.0mmHg inside a steel tank is cooled from 500.0°C to 0.00°C what is the final pressure of the gas in the steel tank
Answer:
1429.32 mmHg
Explanation:
Initial Pressure P1 = 3000.0mmHg
Initial Temperature T1 = 500.0°C + 273 = 573 K ( Converting to kelvin temperature)
Final Temperature T2 = 0.00°C + 273 = 273 K ( Converting to kelvin temperature)
Final Pressure P2 = ?
The pressure of a given amount of gas is directly proportional to the absolute temperature provided volume remains constant.
This is given by the mathematical expression;
P1 / T1 = P2 / T2
Inserting the values;
3000 / 573 = P2 / 273
P2 = 273 * 3000 / 573
P2 = 1429.32 mmHg
which of the following best explains why the strings of a harp make sounds when it is played?
The diagram shows a vertical number line. A vertical line with arrowheads at both ends has tick marks every 4 units with the tick marks for negative 4, 0, 8 labeled. The tick mark two past 8 has an X next to it. What is the position of point X? –16 –12 12 16
Answer:
16
Explanation:
Answer:
its 16
Explanation:
i took the quiz and it was right
Please help me fast...
B) 1 and 3
it's the right answer
Answer:
For 3rd question, the answer is option D
Identify the reaction that would possibly make a good
airbag inflator.
a. Fe (s) + S (s) - Fes (s)
b.CH, (g) + 20 (g) - CO, (g) + 2H,0 (
c. Cao (s) + H20 (1) - Ca(OH), (s)
d. 2KCIO, (s) - 2KCl(s) + 30 (9)
Answer:
D
Explanation:
Cuz i got it wrong and this was the right answer : )
The best reaction that would possibly make a good airbag inflator is the reaction in which CO2 is produced.
An airbag refers to certain objects that are put into vehicles to ensure that the occupants of the vehicle do not bump against objects that are within or outside the vehicle when there is a collision.
Since a good airbag must contain substances that quickly react to produce a non-combustible gas that fills up the airbag in order to cushion the effect of a collision, the best reaction that would possibly make a good airbag inflator is the reaction in which CO2 is produced.
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A skateboarder coasts a distance of 20 meters in 4 seconds. What is the person's speed?
Answer:
5
Explanation:
20/4
Balance the folowing equation.
S + 02
ws
SO:
Answer:
s+o2=so2
Explanation:
i hope it will help u
The ____________________ package and distribute materials to other parts of the cell.
how do we know that a chemical reaction occured
Answer: signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
Explanation:
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Which coefficient placed before HCl will balance the following
equation? Zn+HCI ZnCl2 + H2
Explanation:
Given chemical equation
Zn + HCL ➡ ZnCl2 + H2
Now balancing
Zn + 2HCL ➡ ZnCl2 + H2
Hope it will help :)❤
The coefficient placed before HCl which makes the equation to be balanced is 2.
To know which coefficient will be placed before HCl to balance the equation, we shall simply balance the equation given from the question.
Zn + HCl —> ZnCl₂ + H₂
The above equation can be balance as illustrated below:
There are 2 atoms of H on the right side and 1 atom on the left side. It can be balance by writing 2 before HCl as shown below:
Zn + 2HCl —> ZnCl₂ + H₂
Now, the equation is balanced.
From the balanced equation above, the coefficient written before HCl which makes the equation to be balance is 2.
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How are mixtures and solutions different from each other?
A. there are no differences
B. one combiner chemically the other combines electronically
C. They have more than one element in them
D. the mixture can be separated and the solution is not easily separated
Which elements are;
a)solids,
b)liquids
c)gases
at 25°C
How many moles are in 35.6 g of H2O
Answer:
Given
mass of H2O (m) =35.6g
molarmass (mr) = H2O ), 1x2+16=18g/mol
moles of H2O (n) =?
sln
n=m/mr
n=35.6g/18g/mol
n=1.978moles
the moles of H2O are 1.978moles
Need help answering these questions. Please show all work. Thank you so much.
Answer:
i dont know
Explanation:
Select the correct answer.
The elements beryllium, calcium, and strontium are all in group 2. What is the correct relationship of these elements regarding their ionization energy?
A.
Ca < Be < Sr
B.
Sr < Be < Ca
C.
Be < Ca < Sr
D.
Sr < Ca < Be
E.
Ca < Sr < Be
Answer:
d. The correct answer for your questions is Sr<Ca<Be
Answer:
Answer:- choice d is correct. Sr<Ca<Be .
Explanations:- Br, Ca, and Sr are all elements of same group as they all have 2 valence electrons. As we move down in a group, a new shell is being added that increases the size of the atom. As the size of an atom increases, it is easy to remove the electron from it's outer most shell in it's gaseous state. Since, Be is above Ca and Ca is above Sr. The size increases in the order, Be < Ca < Sr. It means Be is the smallest one of them and so it's hard to remove from it's outer most shell and hence it's ionization energy is higher.
Sr is largest one in these three elements and so it's easy to remove outer most electron from it that means the ionization energy is least. Ca is between Be and Sr.
So, an increasing order of ionization energy is Sr<Ca<Be . Choice D is correct.
What experiment did J. J. Thomson do?
A. He sent a cathode ray between electrically charged metal plates.
B. He suspended charged oil drops in a chamber.
C. He hit metal plates with light.
D. He shot alpha particles through gold foil
Answer:
A. He sent a cathode ray between electrically charged metal plates
Why is there a difference in the heating rates of land and water?
what are invertebrate? give any three example.
Answer:
Invertebrates are animals which do not have vertibral column. They do not debelop it also. For example: Arthropods , Crawfish and Sea Urchin.
what is the molar mass of Mg(NO2)2?
Answer:
116g/mol
Explanation:
Mg=24
NO2=46
multiple 46 by 2and then add 24
The molar mass of Mg(NO₂)₂ is 116.33 g/mol.
To calculate the molar mass of Mg(NO2)2, we need to determine the atomic masses of each element in the compound and multiply them by their respective subscripts.
The atomic masses of the elements involved are:
Mg (magnesium) = 24.31 g/mol
N (nitrogen) = 14.01 g/mol
O (oxygen) = 16.00 g/mol
The compound Mg(NO₂)₂ contains one magnesium atom (Mg), two nitrate ions (NO₂), and each nitrate ion contains one nitrogen atom (N) and two oxygen atoms (O).
Molar mass of Mg(NO₂)₂ :
Mg: 1 × 24.31 g/mol = 24.31 g/mol
N: 2 × 14.01 g/mol = 28.02 g/mol
O: 4 × 16.00 g/mol = 64.00 g/mol
Now, add up the individual masses:
24.31 g/mol + 28.02 g/mol + 64.00 g/mol = 116.33 g/mol
Therefore, the molar mass of Mg(NO₂)₂ is 116.33 g/mol.
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