Answer:
TRUE. so is breathing, sweating
hope this helped :)
Besides the USA what is another country that does not use the metrio system?
Answer:
The USA, Liberia, and Myanmar (Burma) are the only countries that do not use the metric system
Which of the following element has seven total valence electrons? Your answer: argon helium oxygen bromine
Answer:
bromine
Explanation:
Any element in the halogen group will have seven valence electrons. These elements include fluorine, chlorine, bromine, iodine, and astatine
Question 3 (1 point)
Which of the following is a vector quantity?
a) 16.5 seconds
b) 18.5 m/s west
c) 25 m/s
d) 12 meters
Answer:
B) 18.5 m/
s west
Explanation:
Scalar quantity has MAGNITUDE only
Vector quantity has MAGNITUDE and DIRECTION
Hope this is correct and helpful
HAVE A GOOD DAY!
A small metal sphere has a mass of 0.19 gg and a charge of -23.0 nCnC. It is 10.0 cmcm directly above an identical sphere that has the same charge. This lower sphere is fixed and cannot move. If the upper sphere is released, it will begin to fall.What is the magnitude of its initial acceleration?
Answer:
a = -7.29 m / s²
Explanation:
For this exercise we must use Newton's second law,
F -W = m a
Force is electrical force
F = k q₁ q₂ / r²
k q₁ q₂ / r² -mg = m a
indicate that the charge of the two spheres is equal
q₁ = q₂ = q
a = (k q² / r² - m g) / m
a = k q² / m r² - g
Let's reduce the magnitudes to the SI system
m = 0.19 g (1kg / 1000 g) = 1.9 10⁻⁴ kg
q1 = q2 = q = -23.0 nC (1C / 10⁹ nC) = -23.0 10⁻⁹ C
r = 10.0 cm (1m / 100cm) = 0.1000 m
let's calculate
a = 9 10⁹ (23.0 10⁻⁹)² / (0.1000² 1.9 10⁻⁴) - 9.8
a = -7.29 m / s²
The negative sign indicates that the direction of this acceleration is downward
Help me plz science middle school
The correct answer is A. He created a way of naming organisms based on genus and species
Explanation:
Carl Linnaeus created a simple but precise system for naming organisms of any species and kind. This system was known as binomial nomenclature and the names of organisms depend on two main elements: the genus and the species. The first element is a broad category that covers species with a common origin, and the second one is the species, which describes organisms that can reproduce and share many common features including DNA sequence. According to this, the correct answer is A.
NET FORCE ( PLEASE ANSWER ASAP )
First picture (black background): 50 Newtons UP
Second picture (white background): 30 Newtons RIGHT
The classification and collection of data that are in the form of numbers is called
Answer:
Statistics
Explanation:
what is relation of acceleration of a body to its mass and applied force
What is the acceleration of a car that goes from zero to 60m/s in 15s?
Answer:What is the acceleration of a car that moves from rest to 15.0 m/s in 10.0 s? Vi=0, vf= 15.0 m/s,t=10.0s, a=? a= vf =vi/tA=15.0m/s-0m/s/10.0s = 15.0s/10.0s m/s*1/s =1.50 m/s^2 11.
Explanation:
which scenario is an example of a scientific way of thinking?
Answer:
A example of a scientific way of thinking is making observations, forming questions, making hypotheses, doing an experiment, analyzing the data, and forming a conclusion.
A test car carrying a crash test dummy accelerates from 0 to 30 m/s and then crashes into a brick wall. Describe the direction of the initial acceleration vector and compare the initial acceleration vector’s magnitude with respect to the acceleration magnitude at the moment of the crash. [*** DRAW A DIAGRAM ***]
Answer:
the direction of acceleration of the vehicle is the same direction of its velocity of car
s acceleration has the opposite direction to the car speed.
Explanation:
The initial acceleration of the car can be calculated with
v = v₀ + a t
a = (v-v₀) t
indicate that the initial velocity is zero (v₀ = 0 m / s)
a = v / t
a = 300 / t
the direction of acceleration of the vehicle is the same direction of its acceleration movement.
When the car collides with the wall, it exerts a force in the opposite direction that stops the vehicle, therefore this acceleration has the opposite direction to the car speed. But your module must be much larger since the distance traveled to stop is small
what are the 5 native elements?
Answer:
platinum, iridium, osmium, iron, zinc
Under what circumstances does distance traveled equal magnitude of displacement? What is the only case in which magnitude of displacement and distance are exactly the same?
Answer: Please find the answer in the explanation
Explanation:
Under what circumstances does distance traveled equal magnitude of displacement?
When a body's motion is linear in one direction. Or a body moving in a straight line without turning back.
What is the only case in which magnitude of displacement and distance are exactly the same?
When the body is moving in a straight line with without changing direction or without turning back.
A hummingbird beats it’s wings up and down 60 times a second what is the frequency and period
Answer:
Period = 0.0167 seconds
Frequency = 60 Hz
Explanation:
Period: This can be defined as the time take by a wave to complete on cycle. The S.I unit is (s)
Frequency: This is the number of cycle completed by a wave. The S.I unit is (Hz)
From the question,
T = t/n................................... Equation 1
Where T = period, t = time take to complete n oscillation, n = number of oscillation.
Given: t = 1 seconds, n = 60.
Substitute these values into equation 1
T = 1/60
T = 0.0167 seconds.
Also,
F = 1/T........................... Equation 2
Where F = frequency
Given: T = 0.0167 seconds,
Substitute these value into equation 2
F = 1/0.0167
F = 60 Hz
An egg falls out of a nest of a tree. It freefalls for 1.5 seconds, and then hits the ground. From how high up did the egg fall?
Answer:
11.025m
Explanation:
Using kinematics,
u = Initial velocity = 0.
t = Time taken = 1.5sec.
a = Acceleration from gravity = 9.8m/s^2
Distance = s
= ut + 1/2 * a * t^2
= 0 + 1/2 * 9.8 * (1.5)^2
= 11.025m
The egg fall from the nest of a tree is 11.025 m.
To find height from where the egg fall, the given values are:
Time taken t = 1.5 seconds.
What is the distance of the egg fall? The egg was falling from the nest of a tree.By knowing the concept of Kinematics,
For a particle moving with a constant acceleration, its displacement after a time period is given by
s = ut +1/2 at²
where, u - initial velocity,
t - Time,
a - acceleration.
As u is the Initial velocity = 0.
t = 1.5s
Acceleration from gravity = 9.8m/s²
Here, Distance = s
Substituting all the values in the formula,
s = ut + 1/2 ( a × t²)
= 0 + 1/2 × 9.8 × (1.5)²
Distance s = 11.025m
So, the distance the egg fall from a nest of a tree is s = 11.025 m.
Learn more about Kinematics,
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A straw is placed in a cup of water. The straw has a diameter of 5 mm, the contact angle is 60 degrees and the surface tension of water is 0.073 Nm. Calculate the change in elevation between the water surface in the cup and that in the straw.
Answer:
The change in elevation is 0.0029mmExplanation:
This problem is on the capillary action of water and tube
we are going use the formula below for the rise in liquid level
h= 2Tcos∅/rgρwhere h= height of liquid level in the capillary tube
T= surface tension = 0.073 Nm
∅= angle of contact = 60 degrees
r= radius of bore of capillary tube = 5/2= 2.5 mm to m= 2.5/1000=
2.5*10^-3
g= acceleration due to gravity = 9.81 m/s^2
ρ= density of the liquid (assume water 1000 kg/m³)
we can now substitute to solve for h
[tex]h=\frac{2*0.073cos60}{ 2.5*10^-^3*9.81*10^3} \\\\h=\frac{2*0.073*0.5}{ 2.5*9.81}\\\\h=\frac{0.073}{ 2.5*9.81}\\\\h=\frac{0.073}{ 24.525}\\\\h=\frac{0.073}{ 24.525}\\\\h= 0.0029\\h= 2.9*10^-^3mm[/tex]
3. A bus accelerates at 25 m/s/s. This allows the bus to speed up from 16 m/s to 172 m/s. How long
did this take?
9.18 seconds
-9.18 seconds
-6.24 seconds
6.24 seconds
Answer:
time taken will be 6.24sec.
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Why is a thermos considered a (mostly) closed system?
thermoses come in different shapes and sizes
different types of liquids
stayhot
matter and energy cannot enter or leave the system when the thermos lid is on
tightly
different types of hot or cold items can be stored in a thermos
Answer:
The answer is C. Matter and energy cannot enter or leave the system when the thermos lid is on tightly.
Hope this helps
Thermos considered a closed system as matter and energy cannot enter or leave the system when the thermos lid is on tightly. The correct option is C.
What is a physical system?Any artifact or part of an object that can be evaluated using physics laws is referred to as a physical system.
Physical systems include atoms and bodies of water. The environment is everything outside the system, and it is overlooked in the assessment except for its impacts on the system.
A physical system is a combination of parts or elements that exhibit behavior that the constituents do not. Physical systems are made up of matter and energy.
In physics, chemistry, or engineering, a closed system is a purely natural system that does not permit the transmission of matter into or out of the system, but does allow the transfer of energy.
Thus, C is the correct answer.
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what is machine
and type of machine
Answer:
A machine is a mechanical structure that uses power to apply forces and control movement to perform an intended action.
Explanation:
Example: Elevator
The model below shows a calcium atom. An image has a mix of red and blue balls in its center and 4 concentric black rings around the center. The first ring from the center has 2 small green balls on it. The second ring has 8 small green balls on it. The third ring has 8 small green balls on it. The outermost ring has 2 small green balls on it. How many electrons are in the third energy level?
Answer:
8 electrons in the third energy level
Explanation:
From the description,the third energy level has 8 electron (represented by the small green balls you describe)
Answer:
8
Explanation:
I gotcha fam
HEY CAN ANYONE PLS HELP ME IN DIS! Which prefix represents a unit that is larger than "centi-" ? a. "nano-" b. "pico-" c. "milli-" d. "deci-" e. "micro-"
Tor F
Science and technology
are
mutually beneficial.
Answer:
I believe that it's True.
In descriptive scientific investigations, scientists often make observations to understand the interacting parts of a complex .
Answer:
system
Explanation:
I js took the test
A person holding a lunch bag is moving upward in a hot air balloon at a constant speed of 7.7 m/s . When the balloon is 21 m above the ground, she accidentally releases the bag. Part A What is the speed of the bag just before it reaches the ground
Answer:
The speed of the bag just before it reaches the ground is 21.71 m/s.
Explanation:
The speed of the bag can be found using the following equation:
[tex] v_{f}^{2} = v_{0}^{2} - 2gy [/tex]
Where:
[tex]v_{f}[/tex] is the final speed =?
[tex]v_{0}[/tex] is the initial speed = 7.7 m/s
g: is the gravity = 9.81 m/s²
y: is the height = 21 m
[tex]v_{f}^{2} = v_{0}^{2} - 2gy = (7.7 m/s)^{2} - 2*9.81 m/s^{2}*(-21 m) = 471.31 m^{2}/s^{2}[/tex]
[tex]v_{f} = 21.71 m/s[/tex]
Therefore, the speed of the bag just before it reaches the ground is 21.71 m/s.
I hope it helps you!
Which structure is represented by the letter D? Choose 1 answer: (Choice A) A Chloroplast (Choice B) B Vacuole (Choice C) C Mitochondria (Choice D) D Nucleus
Answer:
vacuole
Explanation:
Remember vacuoles in plant cells are a lot bigger than there animal cell counterparts.
Which scientist created the most modern classification that we use today
Answer:
A. Aristotle
Explanation:
Answer:
A: Aristotle
Explanation:
There is no explanation
Select the correct answer.
Matthew uses the combine harvester to harvest his crops. Which PPE should Mathew use?
А. сар
B.
earmuffs
C. gloves
D. respirator
E. safety glasses
Answer:
Matthew should use the safety glasses as his PPE.
Explanation:
An ant can travel approximately 30 meters per minute. How many meters could an ant move in 45 minutes.
Answer:
From what I see, it's saying that every minute, the ant can move 30 meters. So how many meter would it move in 45 minutes?
30 meters = 1 min
x meters = 45 min
1 min x 45 = 45 min
30 meters x 45 = 1,350 meters
So, I believe the answer would be 1,350 meters.
hope this helps. :>
exlpain the process of harvesting
Answer:
harvesting is a proscess of gathering a ripe crop from the fileds
Explanation:
Using the equation E = mc2, calculate how many joules of energy would be produced by converting 6.8 × 10-6 kg of matter into energy in this fusion reaction. Use c = 3 × 108 m/s.
Answer:
Explanation:
Using the formula : E = mc²
Where m = mass = 6.8 × 10^-6 kg
c = speed of light = 3 ×10^8 m/s
The amount of joules of energy that would be produced equals :
Plugging in our values :
E = mc²
E = (6.8 × 10^-6) kg × (3 ×10^8)²m/s
E = (6.8 × 10^-6) kg × 9 × 10^16 m/s
E = 61.2 × 10^(-6 + 16)
E = 61.2 × 10^10 J
Answer:
E = 6.12 × 1011 kg × m2/s2
Explanation: