Answer:
Control Variable
Explanation:
A control variable is a variable that is held constant throughout the cause of an experiment, in order to test accurately the relationship between the dependent and the independent variables. The control variable, which is amount of water needed by the plants in this case, has the property of affecting the growth of the daisies, hence if it is not held constant, the result of the experiment might not be accurately attributed to the light source alone.
Therefore, to say with certainty that the difference seen in both categories of plants was from the difference in lighting alone, other variables (amount of water, type of soil, temperature etc.) has to be held constant
A car with a mass of 1500 kg is traveling down the interstate at 25 m/s. What is the kinetic energy of the car, measured in Joules?
Answer:
The answer is
468 , 750 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]KE = \frac{1}{2} m {v}^{2} [/tex]
where
m is the mass of the object
v is the speed or velocity
From the question
m = 1500 kg
v = 25 m/s
The kinetic energy of the object is
[tex]KE = \frac{1}{2} \times 1500 \times {25}^{2} \\ = 750 \times 625[/tex]
We have the final answer
468 , 750 JHope this helps you
WILL GIVE BRAINLIEST! QUICK PLEASE HELP!!!
In addition to how much force Earth exerts on the object, which features of an object affect its weight?
mass and location of the object shape and location of the object location of the object and how much energy the object has mass of the object and how much energy the object has
Answer:
I am pretty sure the answer is A
Explanation:
I know its not C
I hope this helps and I'm sorry if it does not.
The features of an object which affect its weight are the mass and location which is denoted as option A.
What is Weight?This is defined as the force acting on the object due to gravity and the formula is W = mg where m is mass and g is acceleration due to gravity.
This is why the weight features of an object is affected by its mass and then location.
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what kind of material is associated with new technology
Answer:
Silicon was touted as the revolutionary material that can do wonders in the tech industry.
Explanation:
The velocity of a car increases from 2.0 m/s to 16.0 m/s in a time period of 3.5 s. What was the average acceleration?
Answer:4.0m/s^2
Explanation:
what are the factors on which pressure exerted by a liquid depend
[tex]\huge\mathfrak\red {Answer:}[/tex]
Pressure within a liquid depends only on the
density of the liquid, the acceleration due to gravity, and the depth within the liquid.The pressure exerted by such a static liquid increases linearly with increasing depth.
[tex]\mathfrak\purple {Hope\: this\: helps\: you...}[/tex]
A ball rolling down a ramp accelerates from 0 m/s to 40 m/s in 10 seconds. What is its acceleration?
Answer:
4
Explanation:
you have to divide the velocity by time so 40 divided by 10 and the answer should be 4
Answer:
Its acceleration is 4 m/s^2.
A car slows down from a velocity of 25 m/s to rest in 5.0 seconds. How far did the car travel during that time?
Answer:
[tex] \boxed{\sf Distance \ travelled = 62.5 \ m} [/tex]
Given:
Initial velocity (u) = 25 m/s
Final velocity (v) = 0 m/s (Rest)
Time taken (t) = 5 seconds
To Find:
Distance travelled by car (s)
Explanation:
From equation of motion of object moving with uniform acceleration in straight line we have:
[tex] \boxed{ \bold{s = (\frac{v + u}{2} )t}}[/tex]
By substituting value of v, u & t in the equation we get:
[tex] \sf \implies s = ( \frac{0 + 25}{2} ) \times 5 \\ \\ \sf \implies s = \frac{25}{2} \times 5 \\ \\ \sf \implies s = 12.5 \times 5 \\ \\ \sf \implies s = 62.5 \: m[/tex]
[tex] \therefore[/tex]
Distance travelled by car (s) = 62.5 m
The distance car travel during that time is 62.5 meter.
What is acceleration?
Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
Initial velocity (u) = 25 m/s
As the car becomes rest, final velocity (v) = 0 m/s (Rest)
Time taken (t) = 5 seconds.
The deceleration of the car: a = (initial speed - final speed)/time interval
= ( 25 m/s - 0 m/s)/5 second
= 5 m/s²
The distance car travel during that time = ut - at²/2
= 25 × 5.0 meter - (5×5²/2) meter
= 62.5 meter.
Hence, the distance car travel during that time is 62.5 meter.
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How much force is generated when a 200 kg block is accelerated at a rate of 25 m/s?
Answer:
F= 5000 N
Explanation:
This problem is related to force on a body, and to tackle it we need to apply newtons first law of motion which states that "a body will continue to be at rest or uniform motion except acted upon by an external force greater than the force keeping the body at rest or uniform motion"
given
mass m= 200kg
acceleration a= 25 m/s
we know that
F= ma
F= 200*25
F= 5000 N
If you increase the amount of energy in an
ice cube, what would happen to the ice
cube?
A. It would change color.
B. It would become a liquid.
C. It would decrease in volume.
D. It would get harder.
What is the acceleration if a car slows down from 30 m/s to 15 m/s in 4 seconds?
Answer:
11.25
Explanation:
acceleration =v-u/t
=-30-15/4
=-45/4
=11.25
hope it helps
Answer:
[tex] \boxed{\sf Acceleration \ (a) = -3.75 \ m/s^2} [/tex]
Given:
Initial velocity (u) = 30 m/s
Final velocity (v) = 15 m/s
Time taken (t) = 4 seconds
To Find:
Acceleration (a) of the car
Explanation:
From equation of motion we have:
[tex] \boxed{ \bold{v = u + at}}[/tex]
By substituting value of v, u & t in the equation we get:
[tex] \sf \implies 15 = 30 + 4a \\ \\ \sf \implies 4a + 30 = 15 \\ \\ \sf \implies 4a = 15 - 30 \\ \\ \sf \implies 4a = - 15 \\ \\ \sf \implies a = - \frac{15}{4} \\ \\ \sf \implies a = - 3.75 \: m {s}^{ - 2} [/tex]
[tex] \therefore[/tex]
Acceleration (a) of the car = -3.75 m/s²
If a car travels 400m in 20 seconds how fast is it going? 20 m/s
Answer:
20m/s
Explanation:
Speed = distance / time
Speed = 400/20
Speed = 20
Running, swimming, and biking are what type of exercise aerobic or anaerobic
Answer:
aerobic is the correct answer
How can rocks reveal a places history
Answer:
the rocks have different layers to them which can contain fossils and different kinds of rocks
Need help with number 1
A jogger runs at a constant rate of 10.0 m every 2.0 seconds. The jogger starts at the origin and runs in the positive direction for 3600.0 seconds. Hint: Draw a position- time graph.
a. Where is the runner at time t= 5.0 s?
b. Where is the runner at time t= 15.0 s?
Answer:
(a) 25 m
(b) 75 m
Explanation:
Given that the jogger runs at a constant rate of 10.0 m every 2.0 seconds.
So, the speed of the jogger,
[tex]v=\frac{10}{2}=5m/s\;\cdots(i)[/tex]
Let d be the distance covered by him in time, t s.
As distance=(speed) x (time)
So, [tex]d=vt[/tex]
From equation (i)
[tex]\Rightarrow d=5t\;\cdots(ii)[/tex]
As the jogger starts from origin, so, the distance, [tex]d[/tex], also represents the position of the jogger at the time [tex]t[/tex] s.
The position-time graph has been shown.
(a) From equation (ii), for t=5.0 s
[tex]d=5\times 5=25 m[/tex]
So, the jogger is at a distance of 25 m from the origin.
(b) Similarly, for t=15.0 s
[tex]d=5\times 15=75 m[/tex]
So, the jogger is at a distance of 75 m from the origin.
a car left skid marks 78 m long on a road as it slid to a stop. If the car’s acceleration was -3.9 m/s, why was its velocity before it began to skid
Answer:
-0.05
Explanation:
-3.9/-3.9= o and -3.9/78= -0.05
Which of the following processes puts carbon from a forest
floor back into the atmosphere?
Answer:
earth process meaning subduction
How is a vector represented in symbol form?
Calculate the volume of a 5-g sample of pure gold
≈ 0.26 cm³
Explanation:Hi there !
Gold is a metal with a very high density.
The density of gold is higher than that of lead.
Density(gold) = 19300 kg/m³ = 19.3 g/cm³
19.3 g ............ 1 cm³
5 g ..................x cm³
x = 5g×1cm³/19.3g = 0.2590 cm³ ≈ 0.26 cm³
Good luck !
A line is represented by one point true or false
what is a synonym for motion
Answer:
there are a lot so imma just say a few movement,moving,shifting,to and from
Explanation:
Hope this helps
A soccer ball is kicked straight up in the air with an initial velocity of 17 m/s and rises to a height
of 14.7 m before beginning to fall back down. How long (in total) is the soccer ball in the air?
Answer:
3.4 s
Explanation:
Given:
Δy = 0 m
v₀ = 17 m/s
a = -10 m/s²
Find: t
Δy = v₀ t + ½ at²
0 m = (17 m/s) t + ½ (-10 m/s²) t²
0 = 17 m/s − (5 m/s²) t
t = 3.4 s
Write 3,800 seconds in hours, minutes, and seconds
Explanation:
3,800 seconds in hours is 1.055556
3,800 seconds in minutes is 63.33333
3,000 seconds in seconds is the same.
Calculating density help me illl give brainliest
Answer:
1. 0.2 g/cm³.
2. 1 g/cm³.
3. 0.72 g.
Explanation:
1. Determination of the density of the bread.
Volume (V) = 2270 cm³
Mass (m) = 454 g
Density (D) =?
The density of a substance is simply defined as the mass of the substance per unit volume of the substance. It is represented mathematically as:
Density (D) = mass (m) /volume (V)
D = m/V
With the above formula, we can calculate the density of the bread as follow:
Volume (V) = 2270 cm³
Mass (m) = 454 g
Density (D) =?
D = m/V
D = 454/2270
D = 0.2 g/cm³
Therefore, the density of the bread is 0.2 g/cm³.
2. Determination of the density of water.
Volume (V) = 1 L
Mass (m) = 1000 g
Density (D) =?
Next, we shall convert 1 L to cm³. This can be obtained as shown below:
1 L = 1000 mL
1 mL = 1 cm³
1000 mL = 1000 cm³
Therefore,
1 L = 1000 mL = 1000 cm³
Therefore, 1 L is equivalent to 1000 cm³.
Finally, we shall determine the density of water as follow:
Volume (V) = 1000 cm³
Mass (m) = 1000 g
Density (D) =?
D = m/V
D = 1000 / 1000
D = 1 g/cm³
Therefore, the density of water is 1 g/cm³.
3. Determination of the mass of the block of wood.
Density (D) = 0.6 g/cm³
Volume (V) = 1.2 cm³
Mass (m) =...?
D = m/V
0.6 = m/1.2
Cross multiply
m = 0.6 × 1.2
m = 0.72 g
Therefore, the mass of the block of wood is 0.72 g.
What is 645 g to kg?
Answer:
0.645 kg
Explanation:
because 1 kg = 1000 g
so 1 g = 1/1000 kg = 0.001 kg
645 g = (645 x 0.001) kg = 0.645 kg
Explain what major mistake producers made when editing the battle scenes for the movie Star Wars
Answer: Air
Explanation:
Roffns dn b bdd
give two examples of vernier calliper
Answer:
Example 1, if a vernier caliper output a measurement reading of 2.13 cm, this means that: The main scale contributes the main number(s) and one decimal place to the reading
E.g. 2. 1 cm, whereby 2 is the main number and 0.1 is the one decimal place number
Explanation:
plz mark as brainliest and hope it helps you
Given no air resistance, all objects near the Earth's surface – regardless of
size and weight – fall with the same acceleration because of gravity.
True or False ?
Answer:
True
Explanation:
Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?
elliptical
irregular
barred spiral
normal spiral
The type of galaxy which has arms that contain sites of active star formation and start close to a bulge in the center is: D. normal spiral.
A star can be defined as a giant celestial (astronomical) object that is made up of a luminous sphere of plasma bounded together by its own gravitational force.
Generally, a star comprises two (2) main interstellar hot gases and these include:
I. Hydrogen (H).
II. Helium (He).
A galaxy refers to a collection of billions of stars, which are existing independently.
This ultimately implies that, the greatest number of stars are found in a galaxy.
According to astronomers, the galaxy is classified into four (4) main categories and these are:
Elliptical galaxy.Irregular galaxy.Peculiar galaxy.Spiral galaxy.Furthermore, spiral galaxies are divided into two (2) major groups such as:
I. Barred spiral.
II. Normal spiral.
A normal spiral is typically made up of arms containing sites of active star formation and it start close to a bulge in the center.
Find more information: https://brainly.com/question/17934476
Answer:
D) normal spiral
Explanation:
Whoever answered it practically wrote a life story. There's no need for an explanation; just get to the point and tell us the answer. But anways, the answer is D.
How can Climate Change impact the formation of Hurricanes?
A hurricane is just like any other low-pressure system.
But it gets bigger, and stronger, and picks up a lot of rain, by passing over warm, tropical ocean water.
If anything like climate change or hot fish were to come along and make that water warmer, then there would be more energy for the low pressure system to absorb from the warmer water. Then it would get even bigger and stronger, and it would pick up even more rain on its way over.
Also, normal-size low-pressure systems over the ocean that could never become tropical storms or hurricanes before, COULD do it now that the ocean is warmer. (Notice how this year, 2020, there have been so many hurricanes and tropical storms that NOAA ran out of names for them, and had to start using Greek letters. This has only happened once before.)
