Answer:
A
Explanation:
14. Red litmus paper turns ______ when it comes in touch with a(n) _______
A.blue, base
B.blue, acid
Answer:
Hello There!!
Explanation:
The answer is=>A.blue, base.
hope this helps,have a great day!!
~Pinky~
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]
A.blue, base.
ThanksHope it helps.4. Mr. G has found two rocks which he needs to classify. Classify both rocks correctly based on the knowledge stated below
list down the different phases of the Moon
Answer:
new Moon.
waxing crescent Moon.
first quarter Moon.
waxing gibbous Moon.
full Moon.
waning gibbous Moon.
last quarter Moon.
waning crescent Moon.
Explanation:
Answer:
NEW MOON
WAXING CRESCENT
FIRST QUARTER
WAXING GIBBOUS
FULL MOON
THIRD QUARTER
WANING GIBBOUS
WANING CRESCENT
Explanation:
HOPE IT HELPS
Can someone please help me with science.
Answer:
Yes
Explanation:
Yes I try to help you with science
2. The force between charges is 7 N. The distance between the charges is 4 x 10-6 m. If one of the charges is 2 x 10-8 C, what is the strength of the other charge?
3. A pair of equal charges are separated by .75 m. There's a 2500 N force acting on them. What is the strength of the charge?
Plz help!!!!!!
Answer:
2) 6.22 × 10^-13
3) 4.56 × 10^-4
Explanation:
Explain why a person cannot dive in the Mariana Trench in the Pacific Ocean to a depth of approx. 11,000 m without appropriate protective equipment
Answer:
Plzzzz answer fast......
Help!!! Please need it fast. If correct I’ll give b
Answer:
if bother parents have brown eyes but they carry the allele for blue eyes a quarter of the kids will have blue eyes and three quarters will have brown eyes. hope this help I'm sorry if it doesn't.
A rock with a mass of 6 grams has greater thermal energy than a rock with a mass of 7 grams. True or false?
Answer:
Explanation:
False
Earth's plates move slowly across its surface. What will result when two
plates carrying continental crust collide?
Mountains will fall
A valley will be created
All land faults on Earth will be affected.
One plate will be subducted back into the mantle.
A rod is given a charge of +16.7 UC, how many extra protons does It contain?
Answer:
We know that the electronic charge is 1.6 E-19 coulombs
Therefore 1 coulomb of charge contains 1.6 E19 electrons
A charge of 16.7 E6 coulombs therefore contains
N = 16.7 E6 * 1.6 * E-19 = 2.67 E-12 electrons
Also, the charge on the proton equals that on the electron
Choose the best scientific reasoning for how objects with different amounts of mass can influence the rate at which they slow down.
Answer:
The heavier something is, the harder it is to slow down. As such, higher amounts of mass result in a lower rate of slowing.
The star Betelgeuse is 6.1 x 10^18 m away from Earth. How old is the light we see from that star when it reaches us? There are 3.2 x 10^7 seconds in a year (1 point)
635 years old
481 years old
727 years old
559 years old
Answer:
635 years old
Explanation:
The light reaching the earth from the sun will travel at a speed called the speed of light, and this has a universal value of 3 × 10⁸ m/s. Bearing this in mind, let us calculate the age of the light reaching the Earth from the sun:
Distance of star from Earth = 6.1 × 10⁸m
Speed of light = 3 × 10⁸ m/s
We have distance and speed, let us calculate the time of travel of the light from the star to the earth.
Distance = speed × time
6.1 × 10⁸ = 3 × 10⁸ × time
[tex]time = \frac{6.1 \times 10^{18}}{3 \times 10^8}[/tex]
In order to do the division above, we will divide the whole numbers normally, then we will apply the law of indices to the power that says:
Xᵃ ÷ Xᵇ = X⁽ᵃ⁻ᵇ⁾
[tex]\therefore time = \frac{6.1 \times 10^{18}}{3 \times 10^8}\\= \frac{2.03 \times 10^{(18-8)}}{1} \\= 2.03 \times 10^{10}}\ seconds[/tex]
Next, we are told that there are 3.2 × 10⁷ seconds in a year.
∴ The number of years travelled by the light from the star:
[tex]3.2\ \times 10^7\ seconds = 1\ year\\1\ second = \frac{1}{3.2\ \times 10^7} \\\therefore 2.03 \times 10^{10}\ seconds = \frac{2.03 \times 10^{10}}{3.2\ \times 10^7}[/tex]
please note that:
2.03 × 10¹⁰ = 20300000000
3.2 × 10⁷ = 32000000
[tex]\therefore \frac{2.03 \times 10^{10}}{3.2\ \times 10^7}\\= \frac{20300000000}{32000000} \\\\= \frac{20300}{32} \\= 634.347\ years\\[/tex]
The closest answer in the option is 635 years, and we are short of this by some points due probably to approximations in the calculation.
. A little car has a maximum acceleration of 2.57 m/s2. What is the new maximum acceleration of the little car if it tows another car that has the same mass?
Answer:
[tex]a'=1.285\ m/s^2[/tex]
Explanation:
Let m be the mass of a little car and m' be the mass of another car.
We know that,
Force = mass × acceleration
ATQ,
m × a = 2m × a'
a = 2 × a'
[tex]a'=\dfrac{a}{2}\\\\a'=\dfrac{2.57}{2}\\\\a'=1.285\ m/s^2[/tex]
So, the acceleration of another little car is equal to [tex]1.285\ m/s^2[/tex].
Which electromagnetic waves have the longest wavelength and lowest frequencies?
O infrared waves
O ultraviolet rays
O radio waves
O gamma rays
Answer:
gamma rays
Explanation:
they have longer wave lengths than the others
define load distance and effort distance
Answer:
Distance a load moves when acted on by a load force. 8 Effort Force & Effort Distance Effort Force: Force exerted by a person (or motor) when using a machine to lift a load. Effort Distance: The distance over which the effort force acts in a simple machine.
Answer:
Load Distance: Distance a load moves when acted on by a load force. 8 Effort Force & Effort Distance Effort Force: Force exerted by a person (or motor) when using a machine to lift a load. Effort Distance: The distance over which the effort force acts in a simple machine
Explanation:
Load Distance: Distance a load moves when acted on by a load force. 8 Effort Force & Effort Distance Effort Force: Force exerted by a person (or motor) when using a machine to lift a load. Effort Distance: The distance over which the effort force acts in a simple machine
if you operate a 2.0 kilowatt for 2 hours how much energy do you use
Answer:
4 kWh/day
Explanation:
hope this helps!
~mina-san
define refraction of light
Answer:
Refraction is the slowing down of light waves as they pass into a different medium and speeding as they pass out.
hope it helps. plz mark me as brainliest.
The Sun is composed entirely of oxygen and helium.
True
False
(for astronomy)
Answer:
It's true.
And this makes the state of the sun to be "plasma"
Answer: It is False.
Explanation: I am on my final test for Astronomy. And I study really hard and I know its the right answer.
Explain how it is that you could have 2 parents with brown eyes, but you have blue eyes. Talk about the role chromosomes, genotypes, and alleles play in making something like that happen.
Help please will give b to the best one!
Answer:
If both parents had a recessive allele for blue eyes and they had a brown phenotype it is completely possible for the child to have blue eyes.
Explanation:
Chromosomes play the role of transfering the encoded strands of DNA to the child. Genotypes are the traits or groups of traits transferred and need to carry the trait of blue eyes in order for the child to have them. As long as the parents had a recessive allele for blue eyes they could have a blue eyed child.
(apologies for the incomplete answer, I accidentally hit send)
Give two environmental effects of using wood as an energy resource.
Answer:
Using wood also helps keep carbon out of the atmosphere, helping to mitigate climate change.
Deforestation.
Explanation:
Trees store carbon dioxide as they grow. After harvest, wood products continue to store much of this carbon. These benefits continue when wood is reclaimed to manufacture other products.
Extraction of wood within the supply areas clearly affects the forest and the environment. Some of these impacts can be seen in the study areas. The rainfall is increasingly irregular, biodiversity has been lost. Communities have experienced flooding and drought, which adversely affects the most important sector in the country's economy, that of agriculture. The local populations are concerned about these impacts, which affect not only the environment but the whole social economy.
As wood of the trees is made from the carbon and after burning its produces carbon again that adds to air. When you increase this carbon concertation in the air climate starts to change.
Wood as an energy resource is a neutral energy resource when put into fuel wood becomes a resource but when burnt to produce fire becomes resistant.It leads to respiratory problems and air pollution.
Learn more about the two environmental effects of using wood as an energy resource.
brainly.in/question/17875160.
Energy transfer when a moving toy car hits a tennis ball. Also, energy transfers when the tennis ball rolls and hits CDs, making the CDs fall like a domino.
Plz help me asap! I don't know the energy transfers... :(
Answer:
it would be conduction but i dont know the answer choices
Explanation:
and convection would be the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
what is the velocity of a ball right before it hits the ground if it falls from a 2.5 m bookshelf?
Answer:
vf = 7 m/s
Explanation:
The final velocity of the ball right before it hits the ground can be found by using the third equation of motion:
[tex]2gh = v_f^2 - v_i^2[/tex]
where,
g = acceleration due to gravity = 9.81 m/s²
h = height = 2.5 m
vf = final velocity = ?
vi = initial velocity = 0 m/s
Therefore,
[tex]2(9.81\ m/s^2)(2.5\ m) = v_f^2 - (0\ m/s)^2\\v_f = \sqrt{49.05\ m^2/s^2}\\[/tex]
vf = 7 m/s
The complementary color of blue is?
Answer:
I think it's red so yeah hdjjdbebe
Two small nonconducting spheres have a total charge of 94.0 μC . Part A
When placed 31 cm apart, the force each exerts on the other is 11.5 N and is repulsive. What is the charge on each?
Q1,Q2=
Part B
What if the force were attractive?
Q1,Q2=
Answer:
Part A;
The charges are;
Q₁ = 1.32687 μC and Q₂ = 92.67313 μC
Part B
Q₁ = 95.29042 μC, Q₂ = -1.29042 μC
Explanation:
Part A
The total charge on the two nonconducting spheres = 94.0 μC
The force exerted by each on the other when placed 31 cm apart = 11.5 N
Let Q₁ = x represent the charge on one of the spheres and let Q₂ represent the charge on the other sphere
The force, 'F', exerted by a charge is given as follows;
[tex]F = k \times \dfrac{\left | Q_1 \right | \cdot \left | Q_2 \right | }{d^2}[/tex]
Where;
d = The distance between the spheres = 31 cm = 0.31 m
k = 8.9875 × 10⁹ N·m²/C²
Where F = 11.5 N
Q₁ + Q₂ = 94.0 μC
∴ Q₂ = 94.0 - Q₁ = 94.0 - x
We get;
[tex]F =11.5 = 8.9875 \times 10^9 \times \dfrac{x\times (94.0-x) \times 10^{-12}}{0.31^2}[/tex]
Therefore;
94·x - x² - 122.965 = 0
x² - 94·x + 122.965
x = (94 ± √((-94)² - 4×1×122.965))/(2 × 1)
Solving gives;
x ≈ 1.32687 × 10⁻⁶ C or x = 92.67313 × 10⁻⁶ C
Therefore, the charges are;
Q₁ = 1.32687 × 10⁻⁶ C and Q₂ = 92.67313 × 10⁻⁶ C
Q₁ = 1.32687 μC and Q₂ = 92.67313 μC
Part B
For attractive force, we have;
Q₁ + Q₂ = 94 × 10⁻⁶...(1)
[tex]11.5 = 8.9875 \times 10^9 \times \dfrac{-x\times (94.0-x)}{0.31^2} = 8.9875 \times 10^9 \times \dfrac{-Q_1\times Q_2}{0.31^2}[/tex]
-Q₁ × Q₂ = 11.5 × 0.31²/(8.9875 × 10⁹) = 1.2296523 × 10⁻¹⁰...(2)
∴ Q₂ = -1.2296523 × 10⁻¹⁰/(Q₁)
Q₁ + Q₂ = Q₁ - 1.2296523 × 10⁻¹⁰/(Q₁) = 94 × 10⁻⁶
Q₁² - 94 × 10⁻⁶·Q₁ - 1.2296523 × 10⁻¹⁰ = 0
∴ Q₁ = (94 × 10⁻⁶ ± √((-94 × 10⁻⁶)² - 4 × 1 × 1.2296523 × 10⁻¹⁰))/(2×1)
Q₁ = 9.529042 × 10⁵ C or -1.29042 × 10⁻⁶ C
Therefore, Q₁ = 9.529042 × 10⁵ C and Q₂ = -1.29042 × 10⁻⁶ C
Q₁ = 95.29042 μC and Q₂ = -1.29042 μC
Which direction will thermal energy flow if you pick up a snowball with your bare hand? Thermal energy will flow from the snowball to your hand. Thermal energy will flow from your hand to the snowball. Thermal energy will not flow between your hand and the snowball.
Answer:
b. Thermal energy will flow from your hand to the snowball.
Explanation:
Answer:
B
Explanation:
Two harmonic waves moving in the same direction are described by y1(x,t)=10.2sin(4x-700t) and y2(x,t)=10.2sin(4x-700t-7.9). What is the amplitude of the resultant wave at interference
Answer:
14.42 units
Explanation:
The waves are given as follows :
[tex]y_1(x,t)=10.2\sin(4x-700t)\\\\y_2(x,t)=10.2\sin(4x-700t-7.9)[/tex]
We need to find the amplitude of the resultant wave at interference. Let it be A. So,
[tex]A=\sqrt{10.2^2+10.2^2} \\\\=14.42\ units[/tex]
So, the amplitude of the resultant wave is equal to 14.42 units.
As current intensity increases, the strength of the magnetic field around both a current-carrying wire and solenoid decreases.
Explanation:
The magnetic field around a wire is given by :
[tex]B=\dfrac{\mu_o I}{2\pi r}[/tex] .......(1)
Where
I is current
r is the distance from wire
The magnetic field around the solenoid is given by :
[tex]B=\mu_o NI[/tex] .....(2)
Where
N is the no. of turns per unit length
From equation (1) and (2), it is clear that the strength of the magnetic field in both current-carrying wire and the solenoid is directly proportional to the current. So, as current intensity increases, the strength of the magnetic field around both a current-carrying wire and solenoid increases. The given statement is false.
anyone know the answer?
Answer:
Elasticity
Elasticity is the ability of rubber, for example to return to it's natural shape after being bent and forced in different directions.
Answer:
Elasticity
Explanation:
just gooooooooogle search it
1. What is the pressure caused on the ground by an elephant of weight 20000N
if each foot has an area of 0.2m??
Answer:
2000 pascal
Hope it helps
what is input and output in science physics
Answer:
Input work is the work done on a machine as the input force acts through the input distance .Other ways it would be the work done on a body or system, that is, forces that are applied to the body or system. This is in contrast to output work which is a force that is applied by the body or system to something else. Output work is the work done by a machine as the output force acts through the output distance. The machine does to the object to increase the output distance.
Explanation: