Answer: 7.27 m/s
Explanation:
Need help on on number 2
Answer:
3 m/s
For every 1 second it moves 3 positions. Hope that helps!
Explanation:For every 1 second it moves 3 positions. Hope that helps!
tell me if it's right
What is the power of an electric toothbrush if it can do 750 joules of work in 75 seconds?
Power = (work done) / (time to do the work)
Power = (750 joules) / (75 seconds)
Power = 10 joules/second
Power = 10 watts
Why do you think false sciences are so widespread?
Answer:
The Internet (social media to be precise)
Explanation:
False science are purported scientific conclusions drawn without any scientific data or procedures followed to arrive at such conclusions. These purported conclusions would have been irrelevant or not widespread without the internet or social media but the easy accessibility to social media globally has made "everyone" to be a scientist or even a publisher without scientific steps.
Some innocent individuals also help share (on the internet) these false science because of the inability to differentiate between the real scientific process and the ones done without any/some due scientific processes hence assisting in promoting these false science unknowingly. If there were no internet, these false sciences would not be this widespread as information will not travel this fast.
A mountain slope and a skier make up a closed system with 21,800 J J of energy. When the skier starts her descent down the mountain, the mechanical energy of the system is 19,500 J. By the time she reaches the bottom, the system's mechanical energy has fallen to 18,230 J. How much of the total energy is transformed into thermal energy?
A. 2,300 J
B. 3,570 J
C. 20,530 J
D. 1,270 J
Answer: 1,270 J
Explanation: APEX
Answer: 1,270 J
Explanation:
Just did it!!
The __ variable is sometimes called the “manipulative ” because
Answer:
Independent.
Explanation: The Independent variable is sometimes called the "manipulative" because it refers to a quantity that is changed by the experimenter.
Which quantity is a vector quantity A. Acceleration B. Mass C. Speed D. Volume
Answer:
Acceleration
Explanation:
A vector quantity has a magnitude and direction. Mass, Speed and Volume are all scalar quantities because they only have magnitude, and not direction.
was an American writer, poet, editor, and literary critic. Poe is best known for his poetry and short stories
Answer:
poet
Explanation:
what if your outgoing,fun,kind,and a bit loud and ppl still don't what to be your friend? What am I doing wrong?
Answer:
Maybe you're hanging out around the wrong crowd. The people you are probably choosing to be around are more quiet then you.
Explanation:
Which component of health-related fitness is developed by performing a wall sit?
A, Body composition
B, Muscular endurance
C, Reaction time
D, Coordination
Answer:
The answer is Muscular endurance
Explanation:
It is this because your seeing how long your muscles can with stand. I answered by guessing lol.
If a car has an initial velocity of 20 m/s and accelerates at 2.0 m/s2 for 100 m, what is its final velocity?
Answer:
28.28 ms-1
Explanation:
v² = u² + 2as
v² = 20² + 2×2×100
v²= 800
v = 28.28 ms-1
7.
You run from your house to a friend's house that is 3 miles away in 30 minutes. You then
immediately walk home, taking 1 hour on your return trip.
Your House
Friend's House
West East
v=d/t
--
v=6mi = 7
-3 miles
a. What was the average speed (in mi/hr) for the entire trip? ,07
b. What was the average velocity (in mi/hr) for the entire trip?
Answer:
a. The average speed is 4 mi/hr
b. The average velocity is 0 mi/hr
Explanation:
a. The average speed is given by the following formula;
[tex]Average \ speed = \dfrac{Total \ Distance}{Total \ Time}[/tex]
The given information are;
The time it took for one friend to run to his friend's house = 30 minutes
The distance between the two houses = 3 miles
The time it took for the friend to walk home = 1 hour
Therefore, the distance the friend ran going to his friend's house = 3 miles and the distance the friend walked going back his house = 3 miles
The total distance travelled = 3 + 3 = 6 miles
The total time taken = 1 hour + 30 minutes = 1 hour 30 minutes = 1.5 hours
Therefore;
[tex]The \ average \ speed = \dfrac{Total \ Distance}{Total \ Time} = \dfrac{6 \ miles }{1.5 \ Hours} = 4 \ miles \ per \ hour[/tex]
The average speed for the entire trip = 4 mi/hr
b. The average velocity is the total change in position divided by the total time taken to make the change or total displacement divided by the total time for the displacement
Mathematically, average velocity is given as follows;
[tex]The \ average \ velocity = \dfrac{Final \ location - Initial \ location}{Time \ taken \ for \ the \ change \ in \ location}[/tex]
[tex]The \ average \ velocity = \dfrac{Total \ displacement}{Time \ taken \ for \ the \ change \ in \ location}[/tex]
[tex]The \ average \ velocity = \dfrac{Total \ change \ in \ location}{Time \ taken \ for \ the \ change \ in \ location}[/tex]
Given that the friend changed his location to his friend's house, a distance of 3 miles he we have;
Initial change in location of the friend = 3 miles
After which the friend then relocates back to his house (and we know that it is the same journey but in opposite direction, he we have;
Final change in location of the friend = -3 miles
We are given that he ran to his friend's house and walked back home in a total time of 1 hour + 30 minutes = 1.5 hours, therefore, we have;
[tex]The \ average \ velocity = \dfrac{Sum \ total \ of \ change \ in \ location}{Time \ taken \ for \ the \ change \ in \ location} = \dfrac{3 + (-3) }{1.5}[/tex]
[tex]The \ average \ velocity = \dfrac{3 \ miles + (-3) \ miles }{1.5} = \dfrac{0 \ miles }{1.5} = 0 \ mi/hr[/tex]
The average velocity = 0 mi/hr.
What is the meaning of life
Answer:
The meaning of life, or the answer to the question: "What is the meaning of life?", pertains to the significance of living or existence in general. Many other related questions include: "Why are we here?", "What is life all about?", or "What is the purpose of existence?"
the unit of pressure is derived unit, why?
Answer:
I hope you understand it.
I had presented answer very clearly would you mark brainliest
A water-balloon launcher with a mass of 1.75 kg is suspended on a wire. It fires a 1.25 kg balloon to the east at a velocity of 12.0 m/s. What is the resulting velocity of the launcher if the net force on the launcher is equal to the reaction force? O A. 6.1 m/s east B. 16.8 m/s west C. 7.6 m/s west D. 8.6 m/s west
Answer:
8.6 to west
Explanation:
The initial momentum of the system is given by the sum of the momentum of the launcher and the momentum of the balloon. The correct answer is option C. 7.6 m/s west.
To solve this problem, we can apply the principle of conservation of momentum. According to this principle, the total momentum before an event is equal to the total momentum after the event, assuming no external forces act on the system.
The momentum of an object is calculated by multiplying its mass by its velocity.
Initial momentum = (mass of launcher × velocity of launcher) + (mass of balloon × velocity of balloon)
Let's substitute the given values into the equation:
Initial momentum:
[tex](1.75 kg * 0 m/s) + (1.25 kg * 12.0 m/s)[/tex]
Initial momentum = 15 kg·m/s
Since the net force on the launcher is equal to the reaction force, we can assume no external forces act on the system. Therefore, the total momentum before firing the balloon is equal to the total momentum after firing the balloon.
Final momentum = (mass of launcher + mass of balloon) × final velocity of the launcher
Let's solve for the final velocity of the launcher:
Final momentum:
[tex](1.75 kg + 1.25 kg)[/tex] × Final velocity of the launcher
15 kg·m/s = 3 kg × final velocity of the launcher
Dividing both sides of the equation by 3 kg gives us:
The final velocity of the launcher = 15 kg·m/s / 3 kg
The final velocity of the launcher = 5 m/s
Since the initial velocity of the balloon is to the east, the final velocity of the launcher will be to the west. Therefore, the correct answer is option C. 7.6 m/s west.
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Please Help!!!! What is the momentum of a 0.01 kg toy car moving at 5.0 m/s? (2 points) 500 kgm/s 50 kgm/s 0.5 kgm/s 0.05 kgm/s
Answer: 0.05 kgm/s
Explanation:
A student will study german at last 3 years
Answer:
i don't understand
Explanation:
Which SI units are combined to describe force
Answer:
the newton (N)
the pascal (Pa)
Explanation:
Combinations of base and derived units may be used to express other derived units. For example, the SI unit of force is the newton (N), the SI unit of pressure is the pascal (Pa)—and the pascal can be defined as one newton per square metre (N/m2).
12 g … _____________________kilograms
Answer:
0.012
Explanation:
21) Y=2+3 solve for y
Answer:
This must be harder than it appears or I'm missing something, but as far as I know y=5
Explanation:
What trend does the reactivity of nonmetals show in a periodic table? a) random changes without any trends on the periodic table b) changes according to trends on the periodic table c) increases from left to right across the periodic table d) decreases from left to right across the periodic table
Answer:
The answer is C. increases from left to right across the periodic table
Explanation:
I took the test
The reactivity increases as we move from left to right in the nonmetals sector of the periodic table. For instance, phosphorus is less reactive than chlorine. The reactivity does, however, diminish as we descend a column of nonmetals.
What reactivity of nonmetals show in a periodic table?Across a period, responsiveness declines as you move from left to right. Higher reactivity results from simpler electron transfer or removal as you move further to the left and down the periodic chart.
The reactivity of non-metals decreases as we move down a group. This is due to: An increase in the quantity of valence shells. The nucleus can no longer hold the electrons with the same force.
Therefore, In a period, the reactivity of non-metals rises from left to right; however, as we move down a group, the reactivity falls down because the tendency to take electrons declines.
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A train travels at a speed of 30mph and travel a distance of 240 miles.How long did it take the train to complete its journey?
Answer:
8hours
Explanation:
240/30 = 8
PLS HELP!!! The quarter back runs 75 meters down a football field in 12 seconds to score a touchdown. How fast did he run? A. 0.2m/s B. 6 m/s C. 26 m/s D. 87 m/s
Answer:
B.6
Explanation:
speed = distance / time
= 75m / 12s
= 6.25 m/s
The closest answer is b. 6 m/s
heart plz
7. How long would it take for you to reach the cafeteria, which is 100 m away, if
you were running at a speed of 20 m/s?
Time = distance / speed
Time = 100m / 20 m/s
Time = 5 seconds
But trust me ... You're not running at 20m/s.
An egg is dropped from a building that is 61 m high. What is the velocity when it hits the ground and how long did it take?
Answer:
the velocity is 10.6m/s
the time taken is 1.5sec
Explanation:
height (h)=61m
from,
[tex] {v}^{2} = 2gh[/tex]
v^2 = 2 (10)(61)
v^2 = 1220
v^2 = 10.6m/s
for time
[tex]v = \frac{1}{2} g {t}^{2} [/tex]
v=10.6
10.6=1×10t^2/2
10.6=5t^2
10.6/5=5t^2/5
t^2=2.12
t=1.5sec
mark me as brainliest pllyyzz
What is good people?
Answer:
a good person is somebody who is not bad who is good nice good humanity
A ____________ is a condition or behavior that may threaten an individual's well-being
Answer:
yeah it may be a risk factor
Explanation:
Which situation describes the best example of rotational motion?
A. Craig sent the pool ball spinning toward the side pocket.
B. The skater repeated the figure eight on the ice.
C. Sara spun the dreidel on its pointed end.
D. The mouse ran in circles around the mousetrap.
yeah i kinda need help ;w;
The answer is C
! I took the test lol :)
The rotation is a circulatory motion of an object around the axis and maybe for infinite time and pass internally by the body's own center of mass then the body is said to be spinning.
Revolution is used synonym for rotation. Such as planet earth rotates around the sun on its axis. Another example of this motion can be that of dreidel spinning on its pointed edge.Hence option C is correct.
Learn more about the describes the best example of rotational motion.
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hey can yall help me out in dis
Answer:
Scientific method
Explanation:
PLS HELP ANSWER QUICK
An astronaut sets off on a space mission to visit The Moon and Mars. When leaving Earth she weighed herself on a set of scales, and she weighed 70kg. When she was on Mars she weighed herself again and it read 26.3kg. When she got back to Earth she weighed herself again, and it read 70kg. Why was there a difference when she was on Mars?
Skid Marx set the world record for acceleration as he went from zero to 10 m/s in 3 seconds. How far did he travel in that time?
Answer:
12000 miles per hour
Explanation:
If skid Marx went from zero to 10 miles in 3 seconds the his speed would have been 12000 miles per hour.
