Answer:
4
Explanation:
i think
need answers for 1-15
I need these before 12:30 am please
Answer:
1.b
2.c
3.a
4.a
5.d
6.false
Explain the bond between Mg2C12 and also what type of bond will it be ionic or covalent?
SOMEONE HELP ME PLEASE!!! ILL GIVE BRAINLY
Physical properties behave identically for all matter under the same conditions.
Physical properties cause atoms and molecules to change structure when substances are mixed.
Physical properties can be observed without changing the identity of a substance.
Physical properties are observed by seeing how a substance reacts with other substances.
Answer:
the answer is c
Explanation:
My reasoning is that its most likely
Which sequence represents the relationship between temperature and volume as explained by the kinetic-molecular theory?
higher temperature, more kinetic energy, more space between particles, higher volume
higher temperature, less kinetic energy, less space between particles, higher volume
higher temperature, more kinetic energy, less space between particles, lower volume
higher temperature, less kinetic energy, more space between particles, lower volume
Answer:
higher temperature, more kinetic energy, more space between particles, higher volume
This is true because increase in temperature kinetic energy increase so molecules move apart and increase volume
Explanation:
An object is located 360 millimeters from a converging lens. The image formed is 150 millimeters high, at a distance of 90 millimeters from the lens. What’s the height of the object?
The height of the object : 600 mm
Further explanationGiven
d object=360 mm(object distance)
d image=90 mm(image distance)
Required
h object
Solution
focal length = f :
[tex]\tt \dfrac{1}{f}=\dfrac{1}{d_o}+\dfrac{1}{d_i}\\\\\dfrac{1}{f}=\dfrac{1}{360}+\dfrac{1}{90}\rightarrow f=72~mm[/tex]
The magnification :
[tex]\tt M=\dfrac{d_i}{d_o}=\dfrac{90}{360}=0.25[/tex]
[tex]\tt M=\dfrac{h_i}{h_o}\\\\0.25=\dfrac{150}{h_o}\rightarrow h_o=600~mm[/tex]
What is this called? it might be sideways but it show look like a Y
Answer:
I'm thinking it might be Element 39: Yttrium, as this is Chemistry.
Explanation:
Differentiate between acids and bases on the basis of their pH values.
Answer:
acid; there ph value is mostly 7
base: there ph value can be more than 7 or less than 7
Answer:
The more towards 0 a pH value is, the increasingly acidic. Conversely, the more towards 14 a pH value is, the increasingly alkaline. Some examples of bases are lye, ammonia, and seawater. Some examples of acids are vinegar, lemon juice, and battery acid. To determine the pH of a liquid, you can use pH strips. Depending on the color (the redder the more acidic, the bluer the more alkaline), you can determine the pH of whatever you are trying to measure.
What is the charge of a beta particle?
Answer:
Beta particles have a charge of minus 1.
Explanation:
Hope this helps!
Answer:
MARK AS BRAINLIEST ANSWER
PLZ FOLLOW ME
Explanation:
Beta particles have a mass which is half of one thousandth of the mass of a proton and carry either a single negative (electron) or positive (positron) charge. As they have a small mass and can be released with high energy, they can reach relativistic speeds (close to the speed of light)
HOPE IT HELPS YOU
These elements most likely belong to which group?
Question are you smart well if you are then ANSWER THIS
whats in the middle of April and march?
What do you have to do to make a nut eating animal to like you?
AND why are you reading this?
Answer:
to get more points and to i have no clue what that answer is
Answer:
R is in the middle of March and April, feed it nuts right?? I'm reading this because I needed points to do my math homework.
Explanation:
A small windmill is to be built at a science competition. A large floor fan is used to power each windmill The task
is to lift a bucket filled with the most number of pennies possible from a height of one meter in one minute.
Which change in decision would most likely increase the weight that the windmill could lift?
A)
Make the fan blades smaller.
B)
Make the arms of the windmill longer,
C)
Make the arms of the windmill shorter
D)
Make the fan blades out of a lighter material.
Answer:
D
Explanation:
I'm doing USA test prep and I got it right
Answer:
Explanation:
It is D
Make the fan blades out of a lighter material.
Need help! Don’t understand
Based on the reading, what can you infer about
aspirin's ester group?
It provides aspirin's pain-killing ability.
It makes the compound more digestible.
It reduces fevers.
Answer:
it makes the compound more digestable
Explanation:
Answer:
B.it makes the compound more digestible
Explanation:
edg 2020 just got it right
brainliest please?
are particles in gas close together
Answer:
Solid particles are close together not gas particles
what is the value of log1.004?
Answer:
−0.60205999
Explanation:
When force are ____ the object does not move
when forces are balanced the object does not move.
Explanation:
if you and your friend push both sides of the chair at the same time with the same amount of strength the chair wouldn't move.
If a 50kg car is pulling a 30kg car, how much force would be required to accelerate the cars at 2m/s/s?
Answer:
160N
Explanation:
The force required to accelerate the two cars can be calculated thus:
F = m × a
Where;
F = force (Newton)
m = mass (kg)
a = acceleration (m/s²)
However, according to the question, a 50kg car is pulling a 30kg car, which means that the mass of the two cars is 50kg + 30kg = 80kg.
a = 2m/s²
F = ma
F = 80 × 2
F = 160N
A science teacher asked students to calculate the density of a toy block. The mass of the block was 110 grams and the volume of the block was 8 cubic centimeters. What was the density of the toy block in cubic centimeters?
Answer:
13.75
Explanation:
Density is equal to mass divided by volume. 110/8 = 13.75
If 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L, the concentration of the resulting solution is A0.025 M B 0.050 M C 0.10 M D 0.50 M E 1.0 M M
Answer: The concentration of the resulting solution is 0.025 M
Explanation:
According to the dilution law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of concentrated [tex]NaOH[/tex] solution = 1.0 M
[tex]V_1[/tex] = volume of concentrated [tex]NaOH[/tex] solution = 50 ml
[tex]M_2[/tex] = molarity of diluted [tex]NaOH[/tex] solution = ?
[tex]V_2[/tex] = volume of diluted [tex]NaOH[/tex] solution = 2.0 L = 2000 ml (1L=1000ml)
Putting in the values we get:
[tex]1.0\times 50=M_2\times 2000[/tex]
[tex]M_2=0.025M[/tex]
Therefore, concentration of the resulting solution is 0.025 M
The concentration of the resulting solution if 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L is 0.025M
HOW TO CALCULATE FINAL CONCENTRATION:
The concentration of a solution can be calculated by using the following formula:C1V1 = C2V2
Where;
C1 = initial concentration (M)C2 = final concentration (M)V1 = initial volume (L)V2 = final volume (L)According to this question;
C1 = 1.0MV1 = 50mLC2 = ?V2 = 2000mL = 2L1 × 50 = C2 × 200050 = 2000C2C2 = 50 ÷ 2000C2 = 0.025MTherefore, the concentration of the resulting solution if 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L is 0.025M.Learn more at: https://brainly.com/question/17329736?referrer=searchResults
3. What is the energy of a photon whose frequency is 5.2 x 1015 Hz? Use the equation: E = hxv
h= 6.626 10-34 J xs
4. What is the frequency of radiation whose wavelength is 2.40 x 105 cm? v=c+X
C= 3 x 108m/s
Answer:
3. 3.45×10¯¹⁸ J.
4. 1.25×10¹⁵ Hz.
Explanation:
3. Determination of the energy of the photon.
Frequency (v) = 5.2×10¹⁵ Hz
Planck's constant (h) = 6.626×10¯³⁴ Js
Energy (E) =?
The energy of the photon can be obtained by using the following formula:
E = hv
E = 6.626×10¯³⁴ × 5.2×10¹⁵
E = 3.45×10¯¹⁸ J
Thus, the energy of the photon is 3.45×10¯¹⁸ J
4. Determination of the frequency of the radiation.
Wavelength (λ) = 2.4×10¯⁵ cm
Velocity (c) = 3×10⁸ m/s
Frequency (v) =?
Next, we shall convert 2.4×10¯⁵ cm to metre (m). This can be obtained as follow:
100 cm = 1 m
Therefore,
2.4×10¯⁵ cm = 2.4×10¯⁵ cm × 1 m /100 cm
2.4×10¯⁵ cm = 2.4×10¯⁷ m
Thus, 2.4×10¯⁵ cm is equivalent to 2.4×10¯⁷ m
Finally, we shall determine the frequency of the radiation by using the following formula as illustrated below:
Wavelength (λ) = 2.4×10¯⁷ m
Velocity (c) = 3×10⁸ m/s
Frequency (v) =?
v = c / λ
v = 3×10⁸ / 2.4×10¯⁷
v = 1.25×10¹⁵ Hz
Thus, the frequency of the radiation is 1.25×10¹⁵ Hz.
Which of the following does not describe a physical property of iron?
A
Iron is silvery-white or gray in color.
B
Iron has a boiling point of about 3,000°C.
C
Iron is a magnetic element.
D
Iron and sulfur react to form iron sulfide.
Answer:
B
Explanation:
Iron becomes liquid when we heat it to a temperature of 1535° C this is it's melting point. If we further heat the liquid to 3,000° C it boils; iron is a gas above this temperature.
If you leave your home at noon, and the speed limit is 50 km/h on the highway, what is the approximate time will you get to Atlantic City if Atlantic City is 150 km away? (obeying the speed limit of course)
Answer:
The time you will get to Atlantic City is 3 pm
Explanation:
Given;
speed limit, v = 50 km/h
distance to be traveled, d = 150km
The time of the motion is given as;
time = distance / speed
t = (150 km) / (50 km/h)
t = 3 hours
Thus, if you leave your home at noon, the time you will get to Atlantic City is given as;
time to get home = 12 pm + 3hours = 3 pm
Therefore, the time you will get to Atlantic City is 3 pm
what makes one of your cells you ?
The sum of the atomic masses of all the atoms in a compound is called the
The only nonmetal in Group 14 is
A carbon.
B. oxygen.
C. nitrogen.
D. fluorine.
Answer:
carbon
Explanation:
i just googled it
Help with the questions ^
Answer:
The arrows are moving in the same direction so you will add the two forces 50N and 30N
Net force = 50 N + 30 N = 80N
and the box will move in the direction of arrow (ie, the same direction of force applied)
What are the flocculation basins?
Answer:
The flocculation basin often has a number of compartments with decreasing mixing speeds as the water advances through the basin. ... This compartmentalized chamber allows increasingly larger floes to form without being broken apart by the mixing blades.
A loop of wire turns between two permanent magnets in a generator. What is
the effect of this motion?
OA. A current of electricity flows from one magnet to the other.
OB. Current stops flowing through the loop of wire.
OC. Mechanical energy transforms into electrical energy.
O
D. The permanent magnets quickly reverse poles, reversing the
current's direction.
Answer:
a current flows through the loop of wire.
Explanation: my answers were worded diffrently
A loop of wire turns between two permanent magnets in a generator and the effect of this motion is conversion of Mechanical energy transforms into electrical energy.
What is generator?Generator is a device which is used to convert mechanical energy to electrical energy.
In generator between the two poles of magnet a loop of wire rotate by the mechanical force which produces magnetic field which in turn convert into the electric field.
Hence, option (c) is correct.
To learn more about generator, visit the below link:
https://brainly.com/question/24487261
In a molecule of calcium sulfide, calcium has two valence electron bonds, and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium sulfide? Also, state why.
A. one
B. two
C. three
D. four
E. none
There are 2 lone pairs
Further explanationGiven
a molecule of calcium sulfide
two valence electron of Calcium(Ca)
six valence electrons of Sulfur(S)
Required
number of lone pairs of electrons
Solution
Lewis structure shows the form of bonds that occur in the valence electrons of an element or compound
Valence electrons are electrons used in a chemical bond
To achieve stability, the element S needs 2 more electrons which are obtained from 2 electrons from the Ca element,
A lone pair electrons means refers to an unshared pair of electrons(not bonding to the other atoms)
Do I use molar mass when the problem gives me grams? (Yes or No), Right answer gets brainliest.
(Stoichiometry Review)
Answer:
yes
Explanation:
yes because the molar mass is an intensive property of the substance, that does not depend on the size of the sample. In the International System of Units (SI), the base unit of molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.
Answer:
Yes, if your calculating from grams to moles.