Answer:
Energy in the campfire originates from the potential chemical energy of the wood, before it is burnt to warm and give light around the campfire.
Explanation:
For a camp fire, the energy input is in the form of the potential chemical energy, stored up in the firewood used to fuel the flame.
The energy output is in the form of heat energy that the campfire radiates all around, light energy given off from the flame, and a little bit of sound energy, heard in the cracking of the firewood as they burn in the flame.
chemical energy ⇒ heat energy + light energy + sound energy
A box with a mass of 2 kg is pushed by a 10 N force. The
acceleration is_m/s2
Answer:
5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{10}{2} = 5 \\ [/tex]
We have the final answer as
5 m/s²Hope this helps you
Using the Arc length formula s = r θ, find the missing variable. Find r when s = 26.4 and θ = 3π/2.
A) 39.6/ π
B) π /17.6
C) 17.6/ π
Answer:The solution is in the attached file below
Explanation:
The value of r is approximately 0.56. The closest option is D) π / 0.56, which is equal to approximately 5.6 when π is approximated to 3.14.
Using the arc length formula, s = rθ, we can rearrange it to find the missing variable r:
r = s / θ
Given that s = 26.4 and θ = 3π/2, we can substitute these values into the formula:
r = 26.4 / (3π/2)
To divide by a fraction, we can multiply by its reciprocal:
r = 26.4 * 2 / (3π)
Now, we simplify:
r = 52.8 / (3π)
To express r in terms of π, we divide:
r ≈ 52.8 / (3 * 3.14)
r ≈ 5.6
Therefore, option D) is the correct answer.
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--The complete Question is, Using the Arc length formula s = r θ, find the missing variable. Find r when s = 26.4 and θ = 3π/2.
A) 39.6/ π
B) π /17.6
C) 17.6/ π
D) 0.56
A space ship travels 234500000 kilometers in 15 hours. What was the average speed of the space ship in m/s?
Answer:
4,342,592.59
Explanation:
234500000/15= 15,633,333.33
15,633,333.33*5/18=4,342,592.59
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Laquita is a competitive diver. She made it to the semi-final round of Olympic tryouts but did not make the team. How should she interpret this loss?
A.
as a sign that her hard work has been wasted and she should find a new sport
B.
as an indication that she should fire her coach and find someone more competent
C.
as an indication that she will definitely win if she comes back again
D.
as a sign that she is an exceptional athlete with a great deal of potential
PLEASE NO LINKS
Answer:
D!!! im sure of it!
Explanation:
its correct in plato
A red car travels 400 m in 20s. A blue car travels 660m in 30s. Which car has the greater average speed?
Answer:
The Blue Car has a greater average speed at 22 m/s.
Explanation:
Red car average = 400 / 20 = 20 m/s
Blue car average = 660 / 30 = 22 m/s
How much force is required to accelerate a .6 kg object at 5 m/s^2
Answer:
[tex].[/tex]
» 30 N
Explanation:
Given :
Mass → m → 6kg
Acceleration → a →
[tex]5 {ms}^{ - 2} [/tex]
To find :
The formula for force
F = m • a
F = 6 • 5
F = 30 N
A baseball batter hits an incoming 40-m/s fastball. The ball leaves the bat at 50 m/s after a ball-on-bat contact time of 0.030 s. What is the force exerted on the 0.15-kg baseball? a. 450 N b. 1250 N c. 90 N d.50N
A block of mass 0.244 kg is placed on top of a light, vertical spring of force constant 4 975 N/m and pushed downward so that the spring is compressed by 0.097 m. After the block is released from rest, it travels upward and then leaves the spring. To what maximum height above the point of release does it rise
As the spring returns to it's equilibrium position, it performs
1/2 (4975 N/m) (0.097 m)² ≈ 23 J
while the gravitational force (opposing the block's upward motion) performs
-(0.244 kg) g (0.097 m) ≈ -2.3 J
of work on the block. By the work energy theorem, the total work done on the block is equal to the change in its kinetic energy:
23 J - 2.3 J = 1/2 (0.244 kg) v² - 0
where v is the speed of the block at the moment it returns to the equilibrium position. Solve for v :
v² = (23 J - 2.3 J) / (1/2 (0.244 kg))
v = √((23 J - 2.3 J) / (1/2 (0.244 kg)))
v ≈ 44 m/s
After leaving the spring, block is in free fall, and at its maximum height h it has zero vertical velocity.
0² - (44 m/s)² = 2 (-g) h
Solve for h :
h = (44 m/s)² / (2g)
h ≈ 2.3 m
Describe how energy changes on a swing.
Answer:
while moving up from the perigee, the swing converts kinetic energy to potential energy, and when coming back down it is transferred back to kinetic energy.
also friction converts energy to heat
Explanation:
yes
Kahalagahan ng diagram
Answer:
Diagrams are essential to provide a clear, unambiguous picture. They can be put together in meetings, can make discussions easier than lots of text and are quicker and easier to do iterations and re-work.
Explanation:
Diagrams play an important role in statistical data presentation. Diagrams are nothing but geometrical figures like lines, bars, circles, squares, etc. Diagrammatic data presentation allows us to understand the data in an easier manner.
A box that has a mass of 4 kg is on a shelf at a height of 4 meters. Calculate the potential energy due to gravity:
Joules
Explanation:
P. E = mgh
P. E = 4x10x4 = 160Joules
NEED HELP!!!!
Elsa has been spending a lot of time on the stair machine at her gym. She is starting to feel really sore in her knees, but she figures that it is not a big deal since exercise often makes people ache. What is the BEST advice for Elsa?
A.
She is right to think that soreness is part of working out.
B.
She is probably using the stair machine wrong if she is sore.
C.
The soreness means that the concentric exercises are doing their job.
D.
Concentric exercise can be hard on joints, so she should be very careful.
Answer:
The correct choice is D. Concentric exercise can be hard on joints, so she should be very careful.
The best advice for Elsa is she is probably using the stair machine wrong if the soreness resides for a long time. Therefore, option (B) is correct.
What do you mean by Exercise?Exercise can be described as the body activity that enhances or maintains physical fitness, wellness, and overall health.
Exercise can be performed for various reasons, to aid growth, develop muscles, improve strength, and the cardiovascular system, honing athletic skills, weight loss or maintenance, and simply for enjoyment.
Many people choose to exercise outdoors where they socialize and improve their well-being as well as their mental health.
The amount of recommended exercise depends upon the type of exercise, goal, and age of the person in terms of health benefits, Even doing a small exercise can be healthier than doing nothing.
Any exercise causes soreness, but if soreness resides for a long time, it can be time to analyze your exercise and modifies it in an appropriate way.
Therefore, if the soreness resides for a long time, then Elsa is probably using the stair machine wrong.
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Animals which only consume other animals are called
Answer:
Carnivores
Explanation:
A carnivore is an organism that mostly eats meat, or the flesh of animals. Sometimes carnivores are called predators. Organisms that carnivores hunt are called prey.
Carnivores are a major part of the food web, a description of which organisms eat which other organisms in the wild. Organisms in the food web are grouped into trophic, or nutritional, levels. There are three trophic levels. Autotrophs, organisms that produce their own food, are the first trophic level. These include plants and algae. Herbivores, organisms that eat plants and other autotrophs, are the second trophic level. Carnivores are the third trophic level. Omnivores, creatures that consume a wide variety of organisms from plants to animals to fungi, are also the third trophic level.
A rescue pilot drops a survival kit while her plane is flying at an altitude of 2000.0 m with a forward velocity of 100.0 m/s. If air friction is disregarded, how far in advance of the starving explorer's drop zone should she release the package?
Answer:
H = 1/2 g t^2 no original vertical velocity
t = (2 * 2000 / 9.8)^1/2 = 20.2 s
Sx = 100 m/s * 20.2 s = 2020 m
A rescue pilot drops a survival kit while the plane is flying at an altitude of 2000 m then the distance travelled by the package after the drop will be 2020 meters.
What is Friction?A force that prevents two solid objects from smoothly sliding or rolling over one another is known as friction. While frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion. To overcome frictional forces in the moving parts, automotive engines use about 20% of their total power.
The main contributor to friction between metals appears to be adhesion, or the forces of attraction, between the contact regions of the surfaces, which are always microscopically uneven.
According to the question,
H = 1/2 g t²
2000 = 1/2(9.8) t²
t² = 4000/ 9.8
t = 20.2 seconds.
So the distance travelled by the package will be :
Distance = s × t
Distance = 100 m/s × 20.2 s
Distance = 2020 meters.
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what is imformashion
Answer:
facts provided or learned about something or someone.
The following are connected in parallel circuit at home EXCEPT:
A. TV
B. light bulbs
C. refrigerator
D. Christmas lights
A ball is thrown horizontally from the top of a tower at 30m high, and lands 15m from its base. What is the ball's initial speed?
Answer:
This question requires gravitational acceleration,t=（2h/g）^ 1/2,Level the initial speed is 15/t.
ANSWER THIS QUESTION!!!! PLSSSSS!!! NEED HELP!!!!! 10 POINTS
Why would oxygen levels make a difference in athletic performance?
A.
Muscles need oxygen to function well.
B.
It is just one biometric that is studied.
C.
Oxygen is important for everyone, not just athletes.
D.
Athletes require less oxygen than those who are less active.
PLEASE NO LINKS (ONLY ANSWER)
Answer:
A. it's the only answer that makes sense. if I'm wrong sorry
A man, moving at 3 km/hr along a
straight line, finds that the rain drops are
falling at 4 km/hr in vertical direction.
Find the angle with which rain drop hits
the ground.
A man, moving at 3 km/hr along a
straight line, finds that the rain drops are
falling at 4 km/hr in vertical direction.
Find the angle with which rain drop hits
the ground.
Answer:
tan
Explanation:
A tractor can apply a force of 15000 Newtons to get out of a mud pit. The
mud is resisting the tractor with a force of 11250 Newtons. The tractor
manages to accelerate out of the mud with a rate of 1.25 m/s^2. What is
the mass of the tractor?
Do electromagnetic waves travel with speed of light?
Answer:
Yes
Explanation:
Especially the Seismic waves which travel faster than the others.
A diver has a mass of 90 kg. If he climbs ip a diving platform 12m high, how much potential energy does he have.
Answer:
10,584 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 90 × 9.8 × 12 = 10,584
We have the final answer as
10,584 JHope this helps you
Plot the line for the equation on the graph.
y−2=−2(x+4)
Compared to the amount of radiation received from the Sun, about how much radiation does the surface of the earth receive from the atmosphere
Answer:
https://earthobservatory.nasa.gov/features/EnergyBalance#:~:text=The%20atmosphere%20absorbs%2023%20percent,surface%20radiates%20only%2012%20percent.
Explanation:
an object is moving east with a constant speed of 20m/s for 4 seconds.What is the object's acceleration
The objects acceleration is 6m/s.
What is the centripetal force exerted on a 3.21 kg mass that is orbiting at a speed of 4.57 m/s around a circle, radius 0.68 m?
Question 6 options:
1)
9.98 N
2)
30.7 N
3)
21.6 N
4)
316 N
5)
98.6 N
Answer:Centripetal acceleration = v²/r = 8²/0.50 = 64/0.50 = 32
Centripetal force = mass * acceleration = 3 * 32 = 96 Newton
So, your answer is 96 Newton
Explanation:
What is the dissolved substance in a solution? A.particles B. solute C.solvement D.water
Answer:
Solute
Explanation:
a solute is dissolved into a solvent to make a solution
Answer:
the answer is solute
because solutes are what are to be dissolved in solvents to form solutions
A body is under the action of two forces 7N and 10N. Find the resultant of the two forces if the forces are parallel and act in opposite directions
Answer:K;O9KGVB
Explanation:
công thức tính điện trường
IM SORRY IF ITS WRŌÑG BUT I HOPE IT HELPS
A spaceship fires a missile toward a second spaceship at 0.950c; the missile approaches the second ship at 0.750c. Describe how the ships are moving with respect to one another.
Answer:
the missile approaches the second ship at 0.750c. Describe how the ships are moving with respect to one another.
Explanation:
