Answer:
He won't stop on time, the distance his car traveled during the braking is greater than 45 m.
Explanation:
Given;
initial velocity of Billy's car, u = 32 m/s
his braking acceleration, -a = 20 m/s
his final velocity when the car stops, v = 0
Apply the following kinematic equation to determine the distance traveled by Billy's car during the braking acceleration;
v² = u² + 2as
0 = 32² + (2 x -9.8)s
0 = 32² - 19.6s
19.6s = 32²
s = (32²) / (19.6)
s = 52.25 m
The distance traveled is greater than 45 m, thus Billy's car will hit the cow.
When the units are smaller,
we need (more / less) of them.
Answer:
more..................
Answer:
If you are referring units to the metric system, I think the answer would be less.
(I'm not completely sure)
Explanation:
I say this because for example, if you have a prescription for 5,000 mg of medicine, and upon getting it filled, the dosage than decimeters (dm), so you expect there to be more than one dm in a km. (Since you are going from a larger unit to a smaller unit, you multiply). Meters is larger than centimeters, so you expect your answer to be less than 7,225.
Hope this helps and makes sense! :D
The weight of a box having a mass of 100 kg is blank N
Answer:980 N
Explanation:
Silicon slides are used in the manufacture of...........
Answer:
computer chips?
Explanation:
How far does a freely falling apple drop in 5.1 s after being released from rest?
Answer:
122.5 meters
Explanation:
g = 9.8 m/s^2 (standard value of g). so the freely falling body fall during the first 5 seconds will fall 122.5 meters if there is no external force work on it in an standard environment
The distance traveled by the apply after being released is 127.45 m.
The given parameters;
time of motion of the apple, t = 5.1 s
initial velocity of the apple, u = 0
The distance traveled by the apply is calculated by applying second kinematic equation as shown below.
Assuming downward motion to be positive.
[tex]s = ut + \frac{1}{2} gt^2\\\\s = 0 + 0.5\times 9.8 \times 5.1^2\\\\s = 127.45 \ m[/tex]
Thus, the distance traveled by the apply after being released is 127.45 m.
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A scientific law seeks to explain why an event ocurred
True or false
I thank it’s true hope u have a good day
How long will it take for a rock to fall 12 meters?
Answer:
1.56 seconds.
The rock will take 1.56 seconds to fall.
We have a rock.
We have to determine how long it will take for a rock to fall 12 meters.
State the second equation of motion.The second equation of motion is -
S = ut + 1/2 at²
According to the question -
initial velocity = u = 0 m/s
acceleration = a = 9.8 m/s²
distance = S = 12 meters
Using the second equation of motion -
S = ut + 1/2 at²
12 = 0 + 0.5 x 9.8 x t²
12 = 4.9t²
t² = 2.45
t = 1.56 seconds
Hence, the rock will take 1.56 seconds to fall.
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An astronaut is at rest in space while holding an asteroid. She pushes off the asteroid that has
more mass than she does. Which object will receive the greater impulse during the
separation?
A) the astronaut
B) the asteroid
C) they will both have equal but opposite impulses
D) they each will have zero impulse
why knowing how to graph movement can help you on a practical level?
When doing analysis of any kind, calculations can be assessed better using a graph.
What are the features of graph ?
A graph can be presented as pictorial form the of data of numeric values in an organized manner which helps the user to represent large amount of data in visual form.
There are two types of questions and the features of graphs are interpretation of given graphs or selecting a graph based on a verbal description.
The bar graphs are the most commonly used type of graph, other graphs are dot plots, histograms, line graphs and scatterplots.
A Bar Graph can be presented as the graphical display of data using rectangular bars of different parameters like heights, The structure can be represented in the y axis contains values, and the x axis contains categories or time periods.
A dot plot is a simple graphical representation which shows the frequency with which items appears in a data set and present data on the x axis.
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Adhesion is when forces of the molecules are more strongly drawn to each other than the molecules in other substances true or false
Answer:
False
Explanation:
that is cohesion. adhesion is force between dissimilar molecules of a body
to crossing over the flooded canal.
A. throwing
B. tossing
C. rolling
D. catching
E. running
F. jumping
G. hopping
(this are skills)
I need an answer ASAP
Answer:
F. jumping
Explanation:
you can't throw/toss yourself, you cant roll over water, catching?, you cant run over water, jumps are bigger than hops
Which of these is a chemical property of a substance?
a. color
b. melting point
c. reactivity
d. density
for any given motion the velocity is
Answer:
The velocity of an object refers to the rate at which the object's position changes. For any given motion, it is possible that an object could move very fast yet have an abnormally small
Formula:
velocity = distance travelled in a straight line/ time taken
True or False. When energy changes form, some energy is lost to heat.
Group of answer choices
False
True
False
Explantion: Energy is neither generated nor lost and can only be transferred from one form to another. But all energy is not transformed from one form to another. Some of the energy is radiated in the form of heat.
Answer:
Explanation:
True. It’s possible when energy changes form, some energy is lost to heat.
please help me ASAP..
Answer:
graph will be..
------------------------
What is the magnitude?
is my answer correct plz explain i don't understand it.
Answer:
yes that is correct
Explanation:
Oven mitts reduce which type of thermal energy transfer when you take a hot
pan out of an oven?
A. Conduction
B. Translation
C. Convection
D. Radiation
Answer:
A) Conduction
Explanation:
The mitt keeps the heat from reaching your hand through conduction
Answer: A.conduction
Explanation: i got it right on my test!
HURRY PLEASE!!
A car's horn emits a constant frequency as it accelerates away from a
stationary listener. Which of the following quantities appears to change for
the listener?
A. frequency only
B. frequency and pitch
C. pitch and loudness
D. amplitude and loudness
Answer:
answer is C
Explanation:
just did this
Answer:
Pitch and loudness
C.
Explanation:
HURRY PLEASE SHOW THE WORK TOO!! A truck and a motorbike are at rest and are 900 m apart. They start moving toward, the car accelerates at a rate of 3.2 m/s2 and the motorcycle accelerates at a rate of 5.1 m/s2. At what position will each object pass each other relative to the starting point?
Answer:
They pass each other at 2415.79 m relative to the starting point.
Explanation:
Let s represent the distance moved by the car.
Since they are 900 m apart, it starts from rest and the truck moves at an acceleration of a = 3.2 m/s², we use
s - s₀ = ut + 1/2at² u = initial velocity = 0 (since it starts from rest) and s₀ = 900
s = 900 + 1/2 × 3.2 m/s² × t²
s = 900 + 1.6t²
Let s' represent the distance moved by the motorcycle.
Since it starts from rest and the motorcycle moves at an acceleration of a = 5.1 m/s², we use
s' - s₀' = ut + 1/2at² u = initial velocity = 0 (since it starts from rest) and s₀' = 0 (the starting point of the motorcycle)
s' = 0 + 1/2 × 5.1 m/s² × t²
s' = 2.55t²
At the point where they pass each other, s' = s
2.55t² = 900 + 1.6t²
collecting like terms, we find the time which they meet each other
2.55t² - 1.6t² = 900
0.95t² = 900
t² = 900/0.95
t = √(947.37)
t = 30.78 s
Substituting t into s', we have
s' = 2.55t²
= 2.55(30.78)²
= 2.55(947.37)
= 2415.79 m
So, they pass each other at 2415.79 m relative to the starting point.
Ms. Reitman's scooter starts from rest and accelerates at 2.0 m/s2
What is the scooter's velocity after 2 s?
Answer: 4 m/s
Explanation:
The scooter's velocity after 2 seconds of its start will be 4 m/s.
State first equation of motion?
The first equation of motion is -
v = u + at
Given is Ms. Reitman's scooter that starts from rest and accelerates at
2 m/s².
We can write -
[a] = 2 m/s²
[t] = 2 s
Using the first equation of motion, we can write -
v = u + at
v = 0 + 2 x 2
v = 4 m/s
Therefore, the scooter's velocity after 2 seconds of its start will be 4 m/s.
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1. A plane travels a distance of 500
kilometers in 3600 seconds. What is the
average speed of the plane?
1.39 m/s
69.4 m/s
139 m/s
0.694 m/s
Answer:
Option C, 139 m/s
Explanation:
s = d/t
s = 500*10^3/3600
s = 138.8 = 139 m/s
How long it takes an object to move a certain distance if we know its average speed and the total distance it covers. As previously, it makes no difference whether the speed is constant or not; all that matters is the average distance travelled. Thus, option C is correct.
What average speed of the plane?The object's average speed is the total distance it travels in a predetermined amount of time. A scalar value represents the typical speed. It is characterized by the magnitude and lacks direction.
A body's average speed is its mean value over a given amount of time. Since a moving body's speed fluctuates over time and is not constant, an average speed formula is required.
Therefore, s = d/t s = 500×10^3/3600 s = 138.8 = 139 m/s. Distance travelled divided by time passed equals average speed.
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True or false. The center of gravity and center of mass of an object need to be in the same spot.
Answer: this is true
Answer:
it is actually false, the center of gravity is; the unique point where the weighted relative position of the distributed mass sums to zero, thus the center of mass doesn't have to be in the same spot as the center of gravity
Explanation:
Also i took the test and got it right.
In a fruit basket there are 9 bananas, 4 apples, and 3 plums.
The ratio of plums to apples is _______
Answer:
3:4
Explanation:
A physics student is adjusting the settings of their projectile launcher. If the Vx =
28 m/s and the Vy = 15 m/s, what is the magnitude of its velocity?
32 m/s
13 m/s
43 m/s
1009 m/s
Answer:
32m/s
Explanation:
obtained from V=vx square roo+ vy square root but all terms are squared.
Which elements listed below are most likely to form anions? Select all that apply. Lithium (Li) Calcium (Ca) Sulfur (S) Fluorine (F)
Answer: Li, S, F
Explanation:
They are all non-metallic elements
According to the electronic configuration, elements which will most likely form anions sulfur and fluorine .
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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HELP!!!!
How long would it take Jesse with an acceleration of -2.50 m/s2 to bring his bicycle with an initial velocity of 13.5 m/s to a complete stop?
Answer:
5.4 seconds
Explanation:
use the formula v(final)= v(initial)+at
0=13.5-2.5t
-13.5=-2.5t
t=5.4
PLZ HELP :'3
How could you make a generator turn into a motor?
How could you make a motor turn into a generator?
Which one is more important, a motor or a generator? Defend your answer.
Which one would be more difficult to investigate, a motor or a generator? Defend your answer.
Answer:
1.Turn your DC motor into a generator by disconnecting your motor load and replacing it with a prime mover (probably a petrol engine), then disconnect your DC supply lines from the motor and connect them to your electrical load (lighting system, heating units, etc.), taking care to convert the shunt windings of your
2.Start the motor-generator turning by whatever means you have elected to use, such as a gasoline engine. The motor-generator must spin at 5 to 10 percent over its rated speed. Allow the motor-generator to run for 1 to 2 minutes.
Explanation:
2. Montesquieu's view of the separation of powers was later expressed in the United States Government through which document? A. The Declaration of Independence b. The United States Constitution c. The Two Treatises of Government d. The Social Contract
Answer: b. The United States Constitution
Explanation:
Montesquieu argued that the best form of government, was one where the legislative arm, executive arm, and judicial powers were separate. and in doing so helped kept each other in check to prevent any branch from becoming too powerful. Montesquieu’s separation of powers was not accurate when compared the government of England, But this was later adopted by Americans as the foundation of the U.S. Constitution.
2. How have human activities and natural processes influenced the gradual or sudden change in global temperature? (You need a minimum of 5 complete sentences.)
Answer:
Human activities and natural processes have influenced the change in the global temperature by the following processes
1) Green house gas such as carbon dioxide, methane, ozone, nitrous oxide and fluorinated gases produced by the combustion of fossil fuels the use of industrial chemicals, the production of coal, and natural gas
2) Deforestation which reduces the natural process of conversion of carbon dioxide to oxygen, thereby, increasing the greenhouse gases in the atmosphere
3) The accumulation of the greenhouse gases in the atmosphere results in the trapping of heat in the atmosphere, causing the atmospheric temperature to rise
4) Changes in the amount of energy produced by the Sun can result in an increase or decrease in the atmospheric temperature
5) Volcanic activity that occurs at a sufficiently large scale can produce sulfur dioxide that blocks the rays of the Sun from reaching the Earth, resulting in a change of atmospheric temperature.
Explanation:
Answer:
Green house gas such as carbon dioxide, methane, ozone, nitrous oxide and fluorinated gases produced by the combustion of fossil fuels the use of industrial chemicals, the production of coal, and natural gas
Explanation:
To do work, this truck uses energy stored in chemical
fuel and an electrical battery.
How much total energy does this truck put out?
O 50J
250
O 400
Input
energy
? J
Kinetic
energy
400 J
0800 J
Heat
250 J
Friction
150 J
800 J Got it right on edgenuity
"To do work, this truck uses energy stored in chemical
fuel and an electrical battery.
How much total energy does this truck put out?"
For your question "To do work, this truck uses energy stored in chemical fuel and an electrical battery. How much total energy does this truck put out?"
The answer would be 800 J
400 + 250 + 150 = 800