Answer:
6 seconds
Explanation:
18 divided by 3 is 6.
A statement made prior to an experiment, and based on little scientific evidence, is
called a(n)
a) hypothesis
c) theory
b) prediction
d) all of the above
What level of certainty do you have that the sun will rise tomorrow
my certainty is 99.999999% because the earth has been around for about 4 quadrillion years or more and the sun has risen on almost every single one of them, so the odds of the sun not coming up are very very low.
Answer:
100%
Explanation:
How do you test hydrogen gas
Explanation:
A splint is lit and held near the opening of the tube, then the stopper is removed to expose the splint to the gas. If the gas is flammable, the mixture ignites. This test is most commonly used to identify hydrogen, which extinguishes with a distinctive 'squeaky pop' sound.
Answer:
You can test for hydrogen gas by putting a burning splinter near the gas. The splinter will gives out a 'pop' sound (mini explosion) if it is hydrogen gas
A student walks 100 m East and 100 m North. What is their distance traveled?
-- The student's distance traveled is 200 meters.
-- The student's displacement is 141 meters Northeast.
A cyclist is travelling at 4 metres per second for 100 metres,
how long does it take?
Answer:
25 seconds!
Explanation:
I just had to find what number to multiply 4 to get 100 and it was 25
4x25=100
Or you could do the easier way by dividing 100 by 4 which has the same answer: 25
100÷4=25
When elements gain electrons (negative friends), they become more ________
A. positive
B. neutral
C. negative
What is the base number for the metric system of units? In other words, by what number do we multiply to move up in scale ? _____
Answer:
10
Explanation:
Each time you want to move up the scale, the number is multiplied by 10. The opposite is true when moving down; you must divide by 10.
Answer:
the answer is 10
Explanation:
............
Scientists have data for the density of gas particles at
different levels of the atmosphere. This diagram shows the
trend in that data.
Which statement describes the pattern in the density of gases in the
atmosphere?
A. They are evenly dense throughout the atmosphere.
B. They are less dense near the top of the atmosphere.
C. They are densest near the middle of the atmosphere.
D. They are least dense in the atmosphere near sea level.
Answer:B. They are less dense near the top of the atmosphere
Explanation:
If a boulder is shoved from the top of a cliff with a velocity of 45m/s, if the boulder travels a distance of 20m from the cliff, how long would it take for the boulder to hit the ground?
The time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
What is velocity?Velocity is defined as the speed at which an object's position changes in relation to time and a frame of reference.
It can also be defined as the direction of an object's motion as a measure of how quickly its position is changing as seen from a certain point of view and It is measured by a specific unit of time.
There are basically four types of velocity.
Uniform velocityNon uniform velocityAverage velocityInstantaneous velocityVelocity can be expressed as
Velocity = Distance / Time
Time = Distance / velocity
Time = 20 m / 45 m/s
Time = 0.44 m/s
Thus, the time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
To learn more about velocity, refer to the link below:
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Focus Question: What are SI units, and why are they used?
In 1999, NASA lost the Mars Climate Orbiter because one team used English units
(inches, feet, and pounds) while the other used metric units for a key spacecraft
operation. That was a $125 million dollar mistake... oops! Distance can be measured in
inches, feet, yards, miles, or meters. So, how do scientists know which to use?
Since there are different ways to measure things, scientists and engineers use the
International System of Units, known as Sl units, in order to stay on the same page. This
is important whether you are measuring speed, distance, temperature, or anything else!
To avoid confusion, always show what units of measurement you are using.
.
Answer:
a system of physical units ( SI units ) based on the metre, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
Explanation:
The problem here was not the error; it was the failure of NASA's systems engineering, and the checks and balances in our processes, to detect the error. That's why we lost the spacecraft.
1.
Which of the following process is /are evaporation process
HELP PLSSS
What is the momentum of A 200 kg shark swimming at 15 m/s? |
Answer:
3000 Kg.m/s
Explanation:
From the question given above, the following data were obtained:
Mass (m) of shark = 200 Kg.
Velocity (v) of shark = 15 m/s.
Momentum of shark =..?
The momentum of an object is simply defined as the product of the mass and velocity of the object. Mathematically, it is expressed as:
Momentum = mass (m) × velocity (v)
With the above formula, we can obtain the momentum of the shark as follow:
Mass (m) of shark = 200 Kg.
Velocity (v) of shark = 15 m/s.
Momentum of shark =..?
Momentum = mass (m) × velocity (v)
Momentum of shark = 200 × 15
Momentum of shark = 3000 Kg.m/s
Therefore, the momentum of the shark is 3000 Kg.m/s.
PLEASE HURRY
Which correctly lists three properties that are used to identify minerals?
A. luster, weight, streak
B. magnetism, size, weight
C. size, weight, luster
D. streak, luster, magnetism
Answer:
D.Streak,Luster,Magnetism
Explanation:
Answer:
D. streak, luster, mangnetism
Explanation:
Cuz i took test on edge
How do I find out where two cars intersect when I am given velocity for the red car 14.41cm/s and the starting point for the red car 0.6m. I am also given velocity for the blue car 41.32cm/s and the starting point at 0m.
Explanation:
Write equations for the position of each car as a function of time. (Make sure to convert units if they're different.)
The red car's position x at time t is:
x = (14.41 cm/s) t + 60 cm
The blue car's position x at time t is:
x = (41.32 cm/s) t
To find when they meet, set the equations equal to each other.
(14.41 cm/s) t + 60 cm = (41.32 cm/s) t
60 cm = (26.91 cm/s) t
t = 2.230 s
can anyone pls help me out in dis!!!!!
Answer:
C
Explanation:
The fume hood's ventilation system pulls fumes and fire away from you and the lab, it is safer.
What the relationship between buoyancy and density
An example of a hidden variable would be
Which statement about the physical change of liquid water boiling into steam is true? The heat added represents an energy change. The action cannot be reversed. The steam cannot conserve mass. The weight lost represents a mass change.
Answer:
The heat added represents an energy change.
Explanation:
In a physical change the heat added represents an energy change.
A physical change is a type of change in which a form of matter is affected, but not its chemical composition. That is no new substance is formed during this process.
This change is usually associated with change in energy of the substance.
Examples of these change include;
Melting an ice cube. Boiling of water into steam.Freezing of water, etcThus, in a physical change the heat added represents an energy change.
Learn more here: https://brainly.com/question/18300898
Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C. Round your answer to the nearest hundredth.
Given :
A constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C.
To Find :
The pressure change.
Solution :
By Gay-Lussac's Law :
[tex]\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\\dfrac{1}{30+273}=\dfrac{P_2}{40+273}\\\\P=\dfrac{313}{303}\\\\P=1.033\ atm[/tex]
Change in pressure,
[tex]\Delta \ P=P_2-P_1\\\\\Delta \ P=(1.033-1)\ atm\\\\\Delta \ P=0.33\ atm[/tex]
Therefore, the pressure change is 0.33 atm.
Hence, this is the required solution.
The change in pressure when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C is 0.033 atm and this can be determined by using the Gay-Lusac's law.
Given :
Pressure, [tex]\rm P_1 = 1\;atm[/tex]Gas heated from 30.0°C to 40.0°CGay-Lussac's law can be used in order to determine the pressure change when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C.
According to Gay-Lusac's law:
[tex]\rm \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Now, substitute the values of the known terms in the above expression.
[tex]\rm \dfrac{1}{30+273}=\dfrac{P_2}{40+273}[/tex]
Simplify the above expression in order to determine the value of [tex]\rm P_2[/tex].
[tex]\rm P_2 = \dfrac{313}{303}=1.033\;atm[/tex]
Now, the change in pressure is given by:
[tex]\rm \Delta P = P_2-P_1[/tex]
[tex]\rm \Delta P = 1.033-1=0.033\;atm[/tex]
Therefore, the change in pressure when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C is 0.033 atm.
For more information, refer to the link given below:
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A car capable of a constant acceleration of
3.72 m/s
2
is stopped at a traffic light. When
the light turns green, the car starts from rest
with this acceleration. At the very same moment, a truck traveling with constant velocity
13.8 m/s passes the car.
As the car’s velocity increases, it will eventually move faster than the truck and later
overtake it. How far from the light will the
car catch up with the truck?
Answer in units of m.
Answer:
sorry we don't understand what about of your question is
Explanation:
sorry we don't have a great weekend
A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the ball to reach its maximum height. Find (a) the ball’s initial velocity and (b) the maximum height it reaches.
Answer:
initial velocity is0m/s and final velocity is29.4m/s
Define what factors allow a population of a species to grow to a certain size and how they relate to carrying capacity
Answer:
Relationship between population size, carrying capacity, and limiting factors is described below.
Explanation:
1. There are four variables which govern changes in population size.
births
deaths
immigration
emigration
A population gains individuals by birth and immigration and loses individuals by death and emigration.
2. Populations vary in their capacity to grow. The maximum rate at which a population can increase when resources are unlimited and environmental conditions are ideal is termed the population's biotic potential.
3. There are always limits to population growth in nature. Populations cannot grow exponentially indefinitely. Exploding populations always reach a size limit imposed by the shortage of one or more factors such as water, space, and nutrients or by adverse conditions such as disease, drought and temperature extremes.
4. The factors which act jointly to limit a population's growth are termed the environmental resistance. The interplay of biotic potential and density-dependent environmental resistance keeps a population in balance.
5. Carrying Capacity
For a given region, carrying capacity is the maximum number of individuals of a given species that an area's resources can sustain indefinitely without significantly depleting or degrading those resources. Determining the carrying capacities for most organisms is fairly straightforward. For humans carrying capacity is much more complicated. The definition is expanded to include not degrading our cultural and social environments and not harming the physical environment in ways that would adversely affect future generations.
6. Population Impact
Homo sapiens is a species possessing a diversity of individual needs. Thus, sub-populations will have different requirements and different impacts on the environment. For example 100 million vegetarians will have a significantly different environmental impact than 100 million meat-eaters. This can be demonstrated by comparing the affect on water supplies by both sub-populations. About 1000 tons of water are needed to produce 1 ton of grain. Almost 40% of all grain is used in meat and poultry production. Add to this the amount of water that goes into the production of meat, and you can see that meat comsumption places more stress on global water supplies than grain consumption.
Hope this helps (: Mark me brainliest if its good to you.
What is the instantaneous velocity of B?
What is the instantaneous acceleration at F?
Answer:
B:0
F:1.33
Explanation:
velocity of B is 0 m/s
you can refer to the graph
acceleration of F =slope of F
4/3=1.33 m/s^2
A firework is fired from the ground straight up on a planet with an acceleration due to gravity of 10.56 m/s/s. The firework will not explode until the moment where it would have started to move back down again. The initial speed of the firework is 90.1 m/s. Use this information to find the height at which the firework explodes and the time it will be traveling upward.
Answer:
h = 384.4 m
t = 8.5 s
Explanation:
The firework will explode at the highest point. Because it would start to move downward at the highest point. Using 3rd equation of motion:
2ah = Vf² - Vi²
where,
a = acceleration due to gravity at that planet = -10.56 m/s²
h = maximum height = ?
Vf = Final velocity = 0 m/s (since, firework stops at highest point)
Vi = Initial Velocity = 90.1 m/s
Therefore,
2(-10.56 m/s²)(h) = (0 m/s)² - (90.1 m/s)²
h = 384.4 m
Now, we use 1st equation of motion:
Vf = Vi + at
0 m/s = 90.1 m/s + (-10.56 m/s²)(t)
t = 8.5 s
PLEASE HELP: Which of the following procedures describes how you could best test the hypothesis that a crumpled piece of paper falls faster than a piece of paper folded in fourths?
A. Drop both pieces of paper from the same height at the same time to see which hits the floor first.
B. Drop the crumpled piece of paper first and count how long it takes to hit the floor, and then repeat the procedure with the piece of paper folded in fourths.
C. Throw the crumpled piece of paper first into the air and count how long it takes to hit the floor, and then repeat the procedure with the piece of paper folded in fourths.
D. Find a partner. Both you and your partner throw the pieces of paper up in the air at the same time and see which piece of paper hits the ground first.
Answer:
A because it is the most affective way to do it
Explanation:
Who are people that you can go to for help name three?
Answer:
parent
teacher
peer
Explanation:
A. Shape the pot so that it has a wider base and the same size rim.
B. Shape the pot so that it has a wider base and a wider rim.
C. Shape the pot so that it has the same size base and a wider rim.
O D. Shape the pot so that it has a narrower base and the same size
rim.
Answer:
Answer =
Explanation:
Option A
Plz Mark as brainliest
define velocity and also write their mathematical expression
Calculate the velocity of an object thrown straight up with an initial velocity of 25 m/s at 1.0 seconds.
Answer:
15 m/s
Explanation:
Given:
v₀ = 25 m/s
a = -10 m/s²
t = 1.0 s
Find: v
v = at + v₀
v = (-10 m/s²) (1.0 s) + 25 m/s
v = 15 m/s
1.
If Jane runs a 6 km race, then the distance ran by her in miles is
a 9.6
b 96.6
C 37.3
d 3.73
Answer:
9.6
Explanation:
to convert km to miles multiply by 1.609
Answer: 3.73
Explanation:I used my head and converted 6km to miles and it was 3.73
