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 HURRY
Which correctly lists three properties that are used to identify minerals?
A. luster, weight, streak
B. magnetism, size, weight
C. size, weight, luster
D. streak, luster, magnetism
Answer:
D.Streak,Luster,Magnetism
Explanation:
Answer:
D. streak, luster, mangnetism
Explanation:
Cuz i took test on edge
HELP PLSSS
What is the momentum of A 200 kg shark swimming at 15 m/s? |
Answer:
3000 Kg.m/s
Explanation:
From the question given above, the following data were obtained:
Mass (m) of shark = 200 Kg.
Velocity (v) of shark = 15 m/s.
Momentum of shark =..?
The momentum of an object is simply defined as the product of the mass and velocity of the object. Mathematically, it is expressed as:
Momentum = mass (m) × velocity (v)
With the above formula, we can obtain the momentum of the shark as follow:
Mass (m) of shark = 200 Kg.
Velocity (v) of shark = 15 m/s.
Momentum of shark =..?
Momentum = mass (m) × velocity (v)
Momentum of shark = 200 × 15
Momentum of shark = 3000 Kg.m/s
Therefore, the momentum of the shark is 3000 Kg.m/s.
A cyclist is travelling at 4 metres per second for 100 metres,
how long does it take?
Answer:
25 seconds!
Explanation:
I just had to find what number to multiply 4 to get 100 and it was 25
4x25=100
Or you could do the easier way by dividing 100 by 4 which has the same answer: 25
100÷4=25
Why do some clothes stick together when they come out of the dryer?
Answer:
they stick to each other due to static electricity
Explanation:
Why does your head hurt when you go deep underwater?
Answer:
The pressure under water . It presses against your head
Explanation:
What is the acceleration of the object in the graph?
A. -0.8 m/s^2
B. 1.25 m/s^2
C. -1.25 m/s^2
D. -0.4 m/s^2
Answer:
-0.8 m/s²
Explanation:
Acceleration is the slope of a velocity vs. time graph.
a = Δv / Δt
a = (0 m/s − 12 m/s) / (15 s − 0 s)
a = -0.8 m/s²
Can anyone pls help me out in dis i am struggling in dis!
Answer:
Last option - E
Answer:
The obvious answer would be letter E
Explanation:
Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? plsss help me i need help
Answer:
no they can't talk to each other bcoz of the lack of atmosphere.
Explanation:
l hope it helps you
Which of the following statements about density is true.
there is nothing there
What the relationship between buoyancy and density
A child is pushing a shopping cart at a constant speed of 3.0 m/s. How long will it take this child to push the cart down an aisle with a length of 18.0m?
Answer:
6 seconds
Explanation:
18 divided by 3 is 6.
i don’t know the answer to 4395g=________kg
Answer:
4.395kg
Explanation:
1kg=1000g
Therefore, 4395g/1000g=4.395kg
What is the base number for the metric system of units? In other words, by what number do we multiply to move up in scale ? _____
Answer:
10
Explanation:
Each time you want to move up the scale, the number is multiplied by 10. The opposite is true when moving down; you must divide by 10.
Answer:
the answer is 10
Explanation:
............
A graph can be described as:
a. a mathematical diagram.
b. a scientific model.
c. a way to show relationships between variables.
d. All of the above
Which statement about the physical change of liquid water boiling into steam is true? The heat added represents an energy change. The action cannot be reversed. The steam cannot conserve mass. The weight lost represents a mass change.
Answer:
The heat added represents an energy change.
Explanation:
In a physical change the heat added represents an energy change.
A physical change is a type of change in which a form of matter is affected, but not its chemical composition. That is no new substance is formed during this process.
This change is usually associated with change in energy of the substance.
Examples of these change include;
Melting an ice cube. Boiling of water into steam.Freezing of water, etcThus, in a physical change the heat added represents an energy change.
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define velocity and also write their mathematical expression
Need Help on this image is below thanks.....
Answer:
Mass , this is the answer because mass allows objects of any size to be moved depending on the force of the impact , push or turn
Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C. Round your answer to the nearest hundredth.
Given :
A constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C.
To Find :
The pressure change.
Solution :
By Gay-Lussac's Law :
[tex]\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\\dfrac{1}{30+273}=\dfrac{P_2}{40+273}\\\\P=\dfrac{313}{303}\\\\P=1.033\ atm[/tex]
Change in pressure,
[tex]\Delta \ P=P_2-P_1\\\\\Delta \ P=(1.033-1)\ atm\\\\\Delta \ P=0.33\ atm[/tex]
Therefore, the pressure change is 0.33 atm.
Hence, this is the required solution.
The change in pressure when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C is 0.033 atm and this can be determined by using the Gay-Lusac's law.
Given :
Pressure, [tex]\rm P_1 = 1\;atm[/tex]Gas heated from 30.0°C to 40.0°CGay-Lussac's law can be used in order to determine the pressure change when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C.
According to Gay-Lusac's law:
[tex]\rm \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Now, substitute the values of the known terms in the above expression.
[tex]\rm \dfrac{1}{30+273}=\dfrac{P_2}{40+273}[/tex]
Simplify the above expression in order to determine the value of [tex]\rm P_2[/tex].
[tex]\rm P_2 = \dfrac{313}{303}=1.033\;atm[/tex]
Now, the change in pressure is given by:
[tex]\rm \Delta P = P_2-P_1[/tex]
[tex]\rm \Delta P = 1.033-1=0.033\;atm[/tex]
Therefore, the change in pressure when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C is 0.033 atm.
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A statement made prior to an experiment, and based on little scientific evidence, is
called a(n)
a) hypothesis
c) theory
b) prediction
d) all of the above
PLS HELP ASAP What was most likely a question that inspired Leeuwenhoek, Koch, and Petri as they developed new technologies while exploring germ theory? a.How can broken bones be healed more quickly? b.How can scientists see germs more clearly and easily? c.What makes some foods more dangerous? d.What is the one medicine that can heal all diseases?
Answer:
B
Explanation:
Answer:
your answer is B hope this helped!
Explanation:
PLEASE HELP: Which of the following procedures describes how you could best test the hypothesis that a crumpled piece of paper falls faster than a piece of paper folded in fourths?
A. Drop both pieces of paper from the same height at the same time to see which hits the floor first.
B. Drop the crumpled piece of paper first and count how long it takes to hit the floor, and then repeat the procedure with the piece of paper folded in fourths.
C. Throw the crumpled piece of paper first into the air and count how long it takes to hit the floor, and then repeat the procedure with the piece of paper folded in fourths.
D. Find a partner. Both you and your partner throw the pieces of paper up in the air at the same time and see which piece of paper hits the ground first.
Answer:
A because it is the most affective way to do it
Explanation:
If a boulder is shoved from the top of a cliff with a velocity of 45m/s, if the boulder travels a distance of 20m from the cliff, how long would it take for the boulder to hit the ground?
The time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
What is velocity?Velocity is defined as the speed at which an object's position changes in relation to time and a frame of reference.
It can also be defined as the direction of an object's motion as a measure of how quickly its position is changing as seen from a certain point of view and It is measured by a specific unit of time.
There are basically four types of velocity.
Uniform velocityNon uniform velocityAverage velocityInstantaneous velocityVelocity can be expressed as
Velocity = Distance / Time
Time = Distance / velocity
Time = 20 m / 45 m/s
Time = 0.44 m/s
Thus, the time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
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A firework is fired from the ground straight up on a planet with an acceleration due to gravity of 10.56 m/s/s. The firework will not explode until the moment where it would have started to move back down again. The initial speed of the firework is 90.1 m/s. Use this information to find the height at which the firework explodes and the time it will be traveling upward.
Answer:
h = 384.4 m
t = 8.5 s
Explanation:
The firework will explode at the highest point. Because it would start to move downward at the highest point. Using 3rd equation of motion:
2ah = Vf² - Vi²
where,
a = acceleration due to gravity at that planet = -10.56 m/s²
h = maximum height = ?
Vf = Final velocity = 0 m/s (since, firework stops at highest point)
Vi = Initial Velocity = 90.1 m/s
Therefore,
2(-10.56 m/s²)(h) = (0 m/s)² - (90.1 m/s)²
h = 384.4 m
Now, we use 1st equation of motion:
Vf = Vi + at
0 m/s = 90.1 m/s + (-10.56 m/s²)(t)
t = 8.5 s
Focus Question: What are SI units, and why are they used?
In 1999, NASA lost the Mars Climate Orbiter because one team used English units
(inches, feet, and pounds) while the other used metric units for a key spacecraft
operation. That was a $125 million dollar mistake... oops! Distance can be measured in
inches, feet, yards, miles, or meters. So, how do scientists know which to use?
Since there are different ways to measure things, scientists and engineers use the
International System of Units, known as Sl units, in order to stay on the same page. This
is important whether you are measuring speed, distance, temperature, or anything else!
To avoid confusion, always show what units of measurement you are using.
.
Answer:
a system of physical units ( SI units ) based on the metre, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
Explanation:
The problem here was not the error; it was the failure of NASA's systems engineering, and the checks and balances in our processes, to detect the error. That's why we lost the spacecraft.
1.
If Jane runs a 6 km race, then the distance ran by her in miles is
a 9.6
b 96.6
C 37.3
d 3.73
Answer:
9.6
Explanation:
to convert km to miles multiply by 1.609
Answer: 3.73
Explanation:I used my head and converted 6km to miles and it was 3.73
Write the importance of international bureau of weights and measurement.
Answer:
The importance of international bureau of weights and measures are;
1. to bring unification of measurement system.
2. to establish and preserve fundamental international prototypes.
3. to verify national standards, etc.
The bottom of a box has a surface area of 31.4cm2. The mass of the box is 47.1 kilograms. Acceleration due to gravity at s3a level is 9.80 m/s2. What pressure is exerted by the box where it rests ?
Answer:
The correct answer to the physics problem in pressure given above would be 1.5 N.
First, I converted the cm^2 to m^ 2 (31.4 cm^2 = .00314 m^2).
Then I computed for the force (F= mg = (47.1kg)(9.8m/s^2) = 461.58 N)
Consequently, I used the equation of pressure (P = Force/Area).
P = 461.58 N / .00314 m^2
P = 1.47 or 1.5 N
Explanation:
a crowbar having the length of 1.75 metres is used to balance a load of 500 Newton if the distance between the fulcrum and the load is 0.5 metre, calculate .(fiction is neglected ) i. effort applied to balance the load
Answer:
200 N
Explanation:
Assume that counterclockwise is positive and clockwise is negative.
The 500 N load is 0.5 m from the fulcrum, so the effort force F on the other end is 1.25 m from the fulcrum.
Sum of the torques about the fulcrum equal 0.
∑τ = Iα
(500 N) (0.5 m) − F (1.25 m) = 0
F = 200 N
How long will it take if you travel at 4 m/s for 100m?
10 s
20 s
O
04s
25 s
An example of a hidden variable would be
