Answer:
15 m/s
Explanation:
Given:
F = 0.7N m = 0.25g = 0.0025kg x = 40cm = 0.4m [tex]v_{0}[/tex] = 0
Since F = ma, a = F/m = 0.7N/0.0025kg = 280m/[tex]s^{2}[/tex]
Using the Big Five, [tex]v ^{2} = v_0^{2} + 2ax[/tex], [tex]v = \sqrt{0 + 2*280m/s^2*0.4m} = \sqrt{216} m/s= 15m/s[/tex]
We have that for the Question it can be said that the speed of the marshmallow as it leaves the pipe is most nearly
v=15m/s
From the question we are told
A 2.5 g marshmallow is placed in one end of a 40 cm pipe, as shown in the figure above. A person blows into the left end of the pipe to eject the marshmallow from the right end. The average net force exerted on the marshmallow while it is in the pipe is 0.7 N. The speed of the marshmallow as it leaves the pipe is most nearly
Generally the equation for the acceleration is mathematically given as
[tex]a=\frac{Force}{mass}\\\\a=\frac{F}{m}\\\\Therefore\\\\a=\frac{0.75}{0.0025}\\\\a=280m/s^2\\\\[/tex]
Using Newtons
V^2=u^2+2as
V^2=2(280)*0.4
v=15m/s
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A black hole's gravitational field is unchanged
True
False
Answer:
false
Explanation:
Bob Beamon's 1968 Olympic long jump set a world record which remains unbroken to this day. This amazing jump resulted from an initial velocity of 9.5 m/s at an angle of 40 degrees from the horizontal.
1. Calculate the initial horizontal velocity (V_ix) to two significant figures:
2. Calculate the initial vertical velocity (V_iy) to two significant figures:
3. Calculate the time needed to reach the highest point of the jump (t_1/2) to two significant figures:
4. Calculate the total time (t_TOT) needed to complete the jump to two significant figures:
5. Calculate the maximum height (h) reached during the jump to two significant figures:
6. Calculate the range (total horizontal distance) of his jump to two significant figures:
Answer:
40x+9.5=1/2 of t
Explanation:
Un bat de beisbol ejerce una fuerza promedio de 50n sobre una pelota durante 0.40s.¿ que impulso recibio la pelota tras ser bateada una pelota? De beisbol de 0.11 kg se separa de bat con una rapidez horizontal de 36m/s si el bat esta en contacto con la pelota or 0.5 s ¿cual es el valor de la fuerza horizontal promedio que ejerce el bat en la pelota?
Answer:
A) I = 20 N s
, B) F = 7.92 N
Explanation:
A) The momentum is
I = F Δt
calculate
I = 50 0.40
I = 20 N s
B) The momentum is related to the change of the moment of the system
I = Δp
F Δt = m [tex]v_{f}[/tex] - m v₀
in this case we must assume that the initial velocity is very small, vo = 0
F = m v_{f} / Δt
calculate
F = 0.11 36 / 0.5
F = 7.92 N
billy bob joe's truck has a mass of 3,800 g and an acceleration of 4.5 m/s^2. what is the force of the truck? (you will have to convert your grams first)
Answer:
17.1 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question
3800 g = 3.8 kg
We have
force = 3.8 × 4.5
We have the final answer as
17.1 NHope this helps you
Does anyone know this or done it? It’s for life skills and about MyPlate:)
I don’t have a question
Answer:
Um okay? thank you for the points have a good say and be careful out there!
Explanation:
Answer:
hello
Explanation:
Someone says, "When we burn coal, we are using the energy of ancient sunlight." Write a scientific explanation of what this means.
UNIT 4 EXAM ALL WORK SHOULD BE SHOWN FOR FULL CREDIT.
14.S1 - I can solve for and describe the relationship between the factors involved in momentum and impulse.
1. During a water balloon fight, Eric throws his balloon at Nick, who dodges like a ninja and the balloon hits a
brick wall and explodes. Nick tosses his balloon towards Eric, who cradles the balloon to a stop and the balloon
remains unbroken. Eric claims his secret is soft hands. Is he right? Justify your answer in terms of impulse.
Answer:
ballon is hot
Explanation:
cause of temaputure go iam tecaher of mask school go admission there i will give each and every answer
a lost puppy of 5 kg is 25 m away from his owner of 90 kg. What is the gravitional attraction between the two
Answer:
The gravitational attraction 50 m
Which resultant force is NOT possible if 50 N force and a 60 N force act concurrently?
Answer:
The options are not shown, so i will answer in a general way.
Suppose the case where the forces act in opposite directions, then we need to subtract the forces, and we know that the magnitude of the resultant force will be:
60N - 50N = 10N
Now, suppose the case where both forces act in the exact same direction, in that case, we will add the forces to get:
60N + 50N = 110N
Then the only range of forces that we can get in this system, are the forces such:
10N ≤ F ≤ 110N
Any resultant force outside that range is not possible in this situation.
The distance between two crests of a wave is called 'wavelength*
true
false
Two men pull a 31 kg box with forces 11.6 N and 7.6 N in opposite directions. Find the resultant
acceleration of the box. (Hint: Find the net force first)
Answer:
0.13 m/s².
Explanation:
Mass (m) of box = 31 kg
Force 1 (F1) = 11.6 N
Force 2 (F2) = 7.6 N
Acceleration (a) of box =?
Next, we shall determine the net force acting on the box. This can be obtained as follow:
Force 1 (F1) = 11.6 N
Force 2 (F2) = 7.6 N
Net force (Fn) =?
Fn = F1 – F2
Fn = 11.6 – 7.6
Fn = 4 N
Thus, the net force acting on the box is 4 N.
Finally, we shall determine the acceleration of the box as follow:
Mass (m) of box = 31 kg
Net force (Fn) = 4 N
Acceleration (a) of box =?
Force (F) = mass (m) × acceleration (a)
4 = 31 × a
Divide both side by 31
a = 4 / 31
a = 0.13 m/s²
Therefore, the resultant acceleration of the box is 0.13 m/s².
After three half lives what fraction of the original sample would remain? Explain
Answer:
1/2^3 or 1/8
Explanation:
A rock tumbles straight down from a cliff, it is moving at 20 m/s when it hits. What is the height of the cliff? The mass of the rock is 8 kg.
A. 400 m
B. 160 m
C. 2.5 m
D. 20.4 m
Answer:
D. 20.4m
Explanation:
assuming there is no initial velocity, where v=final velocity, g=acceleration due to gravity, and t=time
v = g*t
20 = 9.8*t
t =2.03 s
y = (1/2) g t^2 where y=vertical distance, g=acceleration due to gravity, and t=time
y = 4.9 (2.03)^2
y = 20.4 meters
A chunk of ice with a mass of 1.2 kg melts and absorbs 3.33 x 10³J of energy. Which best describes what has happened in this system?
Answer:
- Its entropy increases.
Explanation:
Entropy is defined as a 'measure of the amount of energy in a physical system that cannot be used to do work.' It is also employed to denote randomness, disorder, or uncertainty of the arrangement/system. In the given system, the melting of ice denotes the 'increase in entropy' as the amount of energy unavailable to do work increases('absorbs 3.33 x 10³J of energy'). Thus, this signifies that the entropy increases with a rise in temperature as it allows the substance to have greater kinetic energy.
Please match word and definition
Question 10 options:
flow of an electrical charge in a circuit
Prevents electrons from moving
provides a path for electrons to flow
electrons and electric current move easily
1.
electric current
2.
insulator
3.
electric circuit
4.
conductor
Answer:
__4__
electrons and electric current move easily
__3__
provides a path for electrons to flow
__2__
Prevents electrons from moving
__1__
flow of an electrical charge in a circuit
Explanation:
I NEED THIS FAST!
This is the variable that you control in an experiment.
A) Independent Variable
B) Dependent Variable
Answer:
Independent variable
Explanation:
A
A diver jumps off a 60 m cliff with an initial horizontal velocity of 3m/s. Find
the time needed to reach water? *
Answer:
20s
Explanation:
S=vt
t = S/v
t= 60/3
t=20s
What's a Delphinus Delphis niche
Answer:
Delphinus Delphis is a black and white dolphin that leaps high out of the water
Explanation:
Can I get brainliest? plzzz
Which of the following pressure graphs matches the simulation snapshot shown below?
A. Graph A
B. Graph B
C. Graph C
D. Graph D
Answer:
The answer to this question is D
Explanation:
Also all the answers are..
1. B
2. D
3. B
4. D
5. B
what is the name of the database that Tim Berners Lee built??
Answer:
ENQUIRE is the answer
Explanation: google....internet browser-.. .-.
Enquire was a software project written in 1980 by Tim Berners-Lee at CERN, which was the predecessor to the World Wide Web
Can I have some help please :)
Answer:
I don't see
Explanation:
What would you need to do to find the number of neutrons in an atom?
Answer:
You subtract the atomic number from the atomic mass to find the number of neutrons alone
Explanation:
The atomic number is the number of protons OR electrons. They are both equal thus making the atom have a neutral charge. The relative atomic mass is the number of protons AND neutrons.
What is the approximate momentum of a car with a mass of 1200 kg and a velocity of 30 - km/hr(8.33 m/s) ?
Answer:
9996kg.m/s
Explanation:
∆p=mv. 1200kg*8.33m/s
The approximate momentum of this car is 9,996 Kgm/s.
Given the following data:
Mass = 1200 kg Velocity = 8.33 m/s
To determine the approximate momentum of this car;
Momentum refers to the product of the mass possessed by an object and its velocity.
Mathematically, momentum is giving by the formula;
[tex]Momentum = mass \times velocity[/tex]
Substituting into the formula, we have;
[tex]Momentum = 1200 \times 8.33[/tex]
Momentum = 9,996 Kgm/s.
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Which graph of motion shows the motion of an object in equilibrium?
Answer:
The graph line that doesn't change in amounts.
Explanation:
Meaning if its a straight line horizontally across it is in equilibrium. If you don't know what I mean, search up equilibrium graph, and it will show you what I am talking about.
HELPPPPPPP!!!!!!!!!!!!!!!!
2
1 point
Which of the following is an example of an allele?
axial flowers
all of the above
1
a
2
ОО
AA
3
Previous
Answer:
AA
Explanation:
This is flower which is the example of allele
a rope is used to pull a 2.89kg bucket of water out of a deep well. what is the acceleration of the bucket when the tension in the rope is 30.2N?
Answer:
Explanation:
Tension in the rope in upward direction = 30.2 N .
weight of bucket in downward direction = mg
net force in upward direction = 30.2 - mg
30.2 - 2.89 x 9.8
= 1.878 N
acceleration = net force / mass
= 1.878 / 2.89
= .65 m /s² .
= 65 cm /s²
The acceleration of the bucket will be "65 cm/s²".
Tension and acceleration:Whenever the rope, thread, or cable is expanded underneath an applied force, a force is created in that as well, is a tension force.
Tension acts anywhere along the lengths of the string throughout the opposing directly proportional to the force acting upon that.
According to the question,
Tension in the rope = 30.2 N
Mass of bucket, m = 2.89 kg
Acceleration due to gravity, g = 9.8
Now,
The net force will be:
= Tension - mg
= [tex]30.2-(2.89\times 9.8)[/tex]
= [tex]1.878[/tex] N
hence,
The acceleration of the bucket be:
= [tex]\frac{Net \ force}{Mass}[/tex]
By substituting the values,
= [tex]\frac{1.878}{2.89}[/tex]
= [tex]0.65[/tex] m/s²
or,
= [tex]65[/tex] cm/s²
Thus the above approach is correct.
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23. What is the total resistance of the combination of two resistors in the diagram?
A. 0.03
B. 0.15
C. 6.67
D. 30
A body at rest will remain at rest unless acted on by a(an) _____.
Question 1 options:
A. external, unbalanced force.
B. external, balanced force.
