Answer:
μ = 0.49
Explanation:
For this exercise we can use Newton's second law
Y Axis
N - W = 0
N = W = mg
X axis
-fr = ma
the equation for the friction force is
fr = μ N
we substitute
-μ m g = ma
μ = -a / g
we calculate
μ = 4.8 / 9.8
μ = 0.49
A bus traveled at a constant speed of 80 km/h. How long did it take the bus to travel 40 km?
Answer:
1/2 hours
Explanation:
The formula for speed is given as;
s= d/ t -----where
s is speed , 80 km/h
d is distance , 40 km
t is time = ?
Making t is subject of the formula;
t= d/s
Using the values given
t= 40 / 80
t= 1/2 hours
How can we transfer a table of motion data into a line graph?
Answer:
A table of motion (for a moving object) usually is something like:
Time I Position:
0s 1m
1s 3m
2s 5m
etc...
Where time is the independent variable and position represents the position of the object at that given time.
We can think in these points as coordinate pairs, for example, we can wrote these 3 pairs as:
(0s, 1m)
(1s, 3m)
(2s, 5m)
Now that we have these points, we can go to a coordinate plane and find these points
(The time would be on the horizontal axis, and position in the vertical axis)
Once you found the points, to complete the graph you need to find a line that connects the points.
An example of this is shown below, where the points used are the ones above, and the line should be straight.
Gravity can be described as (2 points)
O a magnetic force found in nature
O the force that moves electrical charges
O the force that repels object with like charges
O the force of attraction between two objects
Which of the following determines and objects ability to float in water
Atomic number
Mass and volume
Displacement in a liquid
Mass and gravity
Which type of force is a noncontact force?
Answer:The answer is C: any fundamental force
Explanation:
A P E X
this is an area where two tectonic plates move towards each other with one going under the other plate?
Answer:Convergent boundaries are areas where plates move toward each other and collide. These are also known as compressional or destructive boundaries. Subduction zones occur where an oceanic plate meets a continental plate and is pushed underneath it. Subduction zones are marked by oceanic trenches.
pLS THANK ME AND VOTE ME BRAINLIEST ME
Explanation:
what reactions do catalytic converters catalyze
5. How much power is dissipated when 0.2 ampere of current flows through a 100-ohm resistor ?
Answer:
P=I*I*R
Where P is power
I is current
R is Resistance
P=2*2*100
P=400W
Explanation:
Power is the rate of doing work.
From the Ohm’s law V=IR
Power=I*I*R
A graph that plots the temperature of a star against its brightness.
A. Electromagnetic Radiation
B. Especstroscopy
C. HertzPrung Russel Diagram
Answer:
C. HertzPrung Russel Diagram
Explanation:
The Hertzsprung–Russell diagram, or H–R diagram, is a plot of stellar luminosity against surface temperature. Most stars lie on the main sequence, which extends diagonally across the H–R diagram from high temperature and high luminosity to low temperature and low luminosity.
a car covers at speed of 50m/s. how far it travels in 5 minutes
Answer:
15,000 m
Explanation:
[tex]speed = \frac{distance}{time} [/tex]
speed = 50 m/s
time = 5 minutes × 60
= 300 seconds
substitute the values into the formula
[tex]50 = \frac{distance}{300} [/tex]
[tex]50 \times 300 = distance[/tex]
[tex]15000 \: m = distance[/tex]
[tex]distance = 15000 \: m[/tex]
Can y’all help please
Answer:
advantages of using renewable energy resource
it is safer and cleaner
it does not produces green house gas and has 0 carbon emission
for producing electricity we use solar and wind power that does not harm the environment
advantages of using non renewable energy resource
they are abundant
they are affordable
easy to use
they are easily accessible and compatible
easy to store
Shuffling your feet across the floor as you walk is an example of
A) charging by friction
B) induction
C) static discharge
D) conduction
E) none of the above
Answer:
i think a
Explanation:
Shuffling your feet across the floor as you walk is an example of charging by friction. The correct option is A.
What is friction?The force preventing sliding against one another of solid surfaces, fluid layers, and material components is known as friction.
There are various kinds of friction: Two solid surfaces in touch are opposed to one another's relative lateral motion by dry friction.
Frictional force is the force produced when two surfaces slide against and touch each other.
The surface texture and amount of force needing them together have the biggest an impact on these forces. The amount of frictional force is influenced by the object's position and angle.
As an illustration of how charge is transferred via friction, consider walking over a carpet.
Thus, the correct option is A.
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Hiii :( this is the second question and not making sense to me at all please help <3 it’s due soon
Imagine a linear regression line that fits the data below on temperature and it’s correlation to clothes sales. What is the equation for your regression line?
Answer:
Socratic app
Explanation:
it will help you
PLEASE ANSWER, I HAVE 5 MINUTES!!!!
Discuss the changes in potential energy, kinetic energy, and total energy for a
skateboarder going up and down on a half-pipe (U-shaped) ramp. Specifically address
the energies when the skater is at the highest point (A), half-way down the ramp (B),
and at the lowest point (C).
Answer:
I HAD THE SAME QUESTION AND SEARCHED IT UP AND GOT THE ANSWERS.
Explanation:
What conclusion can you draw from the information shown in the graph?
O A. Global temperatures are increasing due to human activity.
B. Earth is currently experiencing a period of global warming.
O C. Temperature is the only aspect of climate that is changing.
O D. Global temperatures are increasing due to natural causes.
Answer:
The correct option is;
B. Earth is currently experiencing a period of global warming
Explanation:
From the graph, we have;
1) From 1880 to 1900 the temperature anomaly (°C) averages a few degrees below the average surface temperature
2) The decrease below the average surface temperature is larger from 1900 to 1920
3) The surface temperature rises more steadily from below average to a little above average from 1920 to 1940
4) Between 1940 to 1980, the temperature hovers around the average surface temperature
5) The Earth's surface temperature is more or less steadily increasing from 1960 to present
Therefore, the Earth is experiencing a period of global warming
When wax is heated, it turns into a liquid. How are the wax molecules affected by this change of state?
The molecules gain energy
The molecules lose energy
The molecules move closer to one another
The space between the molecules increase
The space between the molecules decrease
Answer:
the CORRECT answer is the "molecules gain energy" because with heating comes energy transferring into the wax molecules. and "the space between the molecules increases" because the molicules will want to space apart because of the heat
Explanation:
Answer: the molecules gain energy, The space between the molecule increases
Explanation:
i got the sauce (plato)
What current passes through a 1 kW heater with 25 V across it?
Answer:The voltage V in volts (V) is equal to the current I in amps (A) times the resistance R in ohms (Ω): V (V) = I (A) × R (Ω) The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): P (W) = V (V) × I (A) AC Ohm's law calculator.
Explanation:
40 ampere current passes through a 1 kW heater with 25 Voltage across it.
What is voltage?The difference in electric potential between two places is known as voltage, often referred to as electric pressure, electric tension, or potential difference. It relates to the amount of labor required to transfer a test charge between two places in a static electric field.
Given that power of the source is 1 kW and voltage is 25 V
current is given as,
Power = Voltage*Current
1kW = 25*Current
Current = 1000/25 = 40 ampere.
40 ampere current passes through a 1 kW heater with 25 Voltage across it.
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A rocket ship starts from rest and turns on its forward booster rockets causing it to have a constant acceleration of 4 meters per second rightward
Complete question is;
A rocket ship starts from rest and turns on its forward booster rockets, causing it to have a constant acceleration of 4 m/s² rightward. After 3s, what will be the velocity of the rocket ship?
Answer:
v = 12 m/s
Explanation:
We are given;
Initial velocity; u = 0 m/s (because ship starts from rest)
Acceleration; a = 4 m/s²
Time; t = 3 s
To find velocity after 3 s, we will use Newton's first equation of motion;
v = u + at
v = 0 + (4 × 3)
v = 12 m/s
please help me!! will mark brainliest
Which tool can easily separate sand and iron filings?
O oil
O magnet
O water
Answer:
A magnet would be the answer
All of the following processes are the ones that lead directly to the formation of sedimentary rock EXCEPT-
deposition of rock fragments.
O
freezing of water in cracks in rock.
o
melting of rock deep underground.
movement of wind that carries earth material.
Answer:
melting of rock deep underground.
Explanation:
The melting of rocks deep underground does not produce sedimentary rocks. Most igneous rocks are produced by this process.
When molten rocks underground called magma is solidified in the subsurface, it results into the formation of igneous bodies.
Sedimentary rocks forms by the accumulation of sediments. Inside the basin where the sediments are deposited, they are compacted, cemented and lithified. Chemical and physical weathering of rocks produces sediments.Your best friend comes to you with a problem: He is not doing well in school because he has too much going on after school. He wants to improve his grades without giving up his after-school activities. What are the three general time-management techniques that you can suggest to him?
Answer:
1. Schedule your activities
2. Prioritize the more important tasks
3. Avoid procrastination
Explanation:
Time-management techniques are strategies or methods developed by people to help them effectively manage their time. My best friend in the scenario above cannot effectively manage his time because he has a lot of activities crowding up his time.
To get better in his grades, he should strike a balance between school work and extracurricular activities. He should make a workable schedule where only the most important tasks are prioritized. He should also learn to execute these tasks on time without postponing them.
Answer:
Sample Response: He should decide on a study time that works best for him, create a study schedule, and manage his study sessions by using a daily to-do list
Explanation:
got it right on edge 2021
A wire of resistance R is cut into ten equal parts which are then connected in parallel. The equivalent resistance of the combination is
Answer:
The equivalent resistance of the combination is R/100
Explanation:
Electric Resistance
The electric resistance of a wire is directly proportional to its length. If a wire of resistance R is cut into 10 equal parts, then each part has a resistance of R/10.
Parallel connection of resistances: If R1, R2, R3,...., Rn are connected in parallel, the equivalent resistance is calculated as follows:
[tex]\displaystyle \frac{1}{R_e}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+...+\frac{1}{R_n}[/tex]
If we have 10 wires of resistance R/10 each and connect them in parallel, the equivalent resistance is:
[tex]\displaystyle \frac{1}{R_e}=\frac{1}{R/10}+\frac{1}{R/10}+\frac{1}{R/10}...+\frac{1}{R/10}[/tex]
This sum is repeated 10 times. Operating each term:
[tex]\displaystyle \frac{1}{R_e}=\frac{10}{R}+\frac{10}{R}+\frac{10}{R}+...+\frac{10}{R}[/tex]
All the terms have the same denominator, thus:
[tex]\displaystyle \frac{1}{R_e}=10\frac{10}{R}=\frac{100}{R}[/tex]
Taking the reciprocals:
[tex]R_e=R/100[/tex]
The equivalent resistance of the combination is R/100
Patrick passes a soccer ball 6.0m directly across the field to Vanessa who then kicks the ball 14.5m directly down the field to Claudia. What is the balls total displacement as its travels between Vanessa and Claudia
Answer:
8.5m bcs you subtract 6.0m and 14.5m.
Using the information given, find the number of Electrons of the unknown element: 6 PROTONS, 6 NEUTRONS, 12 ATOMIC MASS
Answer:
the answer is 24 you are correct
Explanation:
A tractor trailer truck traveling at a speed of 105 feet/second skids to a stop in 12 seconds. Determine the skidding distance of the truck.
Please help.
Answer:
1260ft
Explanation:
Given parameters:
Speed = 105ft/s
Time = 12s
Unknown:
Skidding distance of the truck = ?
Solution:
To solve this problem:
Distance = speed x time
Now insert the parameters and solve;
Distance = 105 x 12 = 1260ft
Which diagram has a greater gravitational force
Answer:
2
Explanation:
Due to the fact that the gravitational force is inversely proportional to the mass of the two interacting objects, heavier objects will be drawn together by a stronger gravitational attraction. As a result, the gravitational pull between two objects grows as their respective masses rise.
What mass has a greater gravitational force?Since the gravitational force is exactly proportional to the mass of both interacting objects, heavier items will be attracted by stronger gravitational forces. Therefore, the gravitational attraction between two objects grows as their respective masses do as well.
The attraction created by gravity is between masses. The gravitational force, commonly known as the gravity force, increases with the size of the masses. With an increase in the distance between masses, the gravitational pull rapidly lessens.
Therefore, second have greater gravitational force.
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4. What factors contribute to a random distribution pattern? Why do animals
not maintain this distribution pattern year round?
1
Answer:
Random distribution may result when resources are equally distributed and are not scarce. As breeding brings individuals together, random distribution is not maintained year round.
When resources are readily available and evenly distributed, random distribution may occur. The random dispersion of individuals is not maintained year-round, since breeding brings people together.
What contribute random distribution pattern in animals?In environments with stable resources and environmental circumstances, random dispersion typically occurs. This pattern of dispersion is unique in that there are no substantial social contacts between species.
On land and in the water, animals are not equally dispersed. Climate zones or in all the confinements is known as Continuous Distribution, and such species of animals are known as Eurytopic Animals.
They are constrained to certain locations by a number of criteria such as food, shelter, and climate.
Therefore, The absence of any significant social interactions between species is what distinguishes this pattern of dispersion.
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starting from rest has and acceleration 0.3 m/s , calculate the velocity and distance travelled by a car after 2 minutes.
Answer:
[tex]v(t=120)=36m/s\\\\d(t=120)=2160 m[/tex]
Explanation:
t=2minutes = 120 seconds:
t=120s
a=0,3m/s²
The cart starting from rest, then: vo=0m/s
We know that:[tex]v(t)=vo+at[/tex]
[tex]v(t)=0,3t[/tex]
After t=120 s the velocity are:
[tex]v(120)=0,3*120\\v(120)=36m/s[/tex]
We know that:[tex]d(t)=do+vo*t+\frac{a}{2}*t^{2}[/tex]
vo=0m/s
do=0m/s
The distance after t=120s are:
[tex]d(120)=0,3*\frac{120*120}{2} \\d(120)=36*60\\d(120)=2160 m[/tex]
Diffferentiare between atmospheric pressure and liquid pressure
Hydrostatic pressure is the pressure exerted by an incompressible fluid (a liquid) at a given point, due to the weight of the fluid above it. Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere (a compressible fluid) above it.