Answer:
In a nutshell, a scientific law predicts what happens while other laws devised by people usually proposes why certain things happen.
Explanation:
A scientific law is one that predicts the results of certain initial conditions. In order words, it predicts what will happen when certain conditions are fulfilled. A very good example is Newton's 3 laws of motion where like the third law which says to every action, there is an equal and opposite reaction or like in the first law which says a body at rest will remain at rest unless it is acted upon by an external force.
Whereas, other laws devised by people usually provides the most logical explanation as to why things happen the way they do. For example explaining why some children develop certain peculiar health issues when they are newly born.
In a nutshell, a scientific law predicts what happens while other laws devised by people usually proposes why certain things happen.
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
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.
Position-Time Graph
30
Position (m)
10-
8)
Time (s)
The graph above represents the motion of a car. Based on the graph, the car is most
likely-
A) driving up a steep hill
B) speeding up
C) driving at constant speed
D) decelerating
Answer:
Option (C)
Explanation:
From the graph attached,
Position of a car is changing with time.
Let the two points (1, 5) and (2, 10) define the positions of a car at the different moment of time.
Since, speed = [tex]\frac{\text{Distance traveled by the car}}{\text{Time taken}}[/tex]
= [tex]\frac{10-5}{2-1}[/tex]
= 5 meter per second
Speed of the car = slope of the line on the graph
Since slope of the line is constant, speed of the car will be constant.
Therefore, Option (C) will be the answer.
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:
The law of____suggests that the orbit of planets is not circular but____.
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
Running, swimming, and biking are what type of exercise aerobic or anaerobic
Answer:
aerobic is the correct answer
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.
Explain what major mistake producers made when editing the battle scenes for the movie Star Wars
Answer: Air
Explanation:
Roffns dn b bdd
Which of the following did the doll experiment not suggest?
A. African Americans attributed more positive characteristics to the white dolls.
B. African Americans had feelings of inferiority because of school segregation.
C. African Americans preferred to play with the white dolls when given a choice.
D. African Americans felt more secure and positive because of school segregation.
Answer: I do believe the answer is D if not then sorry and let others know in the comment section
The doll experiment did not suggest the African Americans felt more secure and positive because of school segregation. The correct option is D.
What is school segregation?School segregation in the United States is the segregation of students based on their colors and caste. An institution can be predominantly owned by the black and only black students can study into it.
The Americans who are black belonged to the African continent. They felt more safety and secure by studying into this segregated school.
Thus, the correct option is D.
Learn more about school segregation.
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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.
Learn more about acceleration here:
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This protects the surrounding environment, human beings, and the
reactor itself from radiation,
Answer:
renewable sources
Explanation:
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.)
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.
WHO CAN ANSWER BOTH 14 and 15 WITH UNITS ILL PUT U AS BRAINLEST!
Answer:
14. V=8
15. V=40
Explanation:
simplifying:
14. 4 32/8
V=8
15. 20 1000/50
V=40
Why is the handle made of a different material than the rest of the pot?
Answer:
Hi there!
Your answer is:
The handle is made from a different material than the rest of the pot because you want to be able to safely move & touch the handle without getting burnt. The pot is made of conductors, like metal, to help it get hot quickly and cook evenly. You need to be able to touch the handle without being in danger, so the handle is made of an insulator, like wood, which doesn't get hot easily
I hope this helps!
Answer: the handle is made up of different material than the rest of the pot because the handle can conduct heat into your hand if its the same material.
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
7
Select all the correct answers.
The distance from Earth to the moon is 384.400 kilometers. What is this distance expressed in scientific notation?
Answer:
3.844 x 10 to the 5th power
Explanation:
How can rocks reveal a places history
Answer:
the rocks have different layers to them which can contain fossils and different kinds of rocks
How is a vector represented in symbol form?
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
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 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
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
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.
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.
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 !
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
Select ALL that apply.The displacement method of measuring volume:
A. is the only way to measure volume.
B. can be used to measure the volume of solids.
C. can yield inaccurate results.
D. is always accurate.
E. is not affected by solubility.
Answer:
Explanation:
C. Can be used to measure the volume of solids
If I was of help mark as brainliest I am 1 short
Answer:
is not always accurate and may yield incorrect results if the matter is soluble in liquid.
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:
