Answer:
24000kgm/s
Explanation:
Given parameters:
Mass of car = 1200kg
Velocity = 20m/s
Unknown:
Momentum = ?
Solution:
Momentum is the amount of motion a body possesses.
Momentum = mass x velocity
Now insert the parameters and solve;
Momentum = 1200 x 20 = 24000kgm/s
[04.04] Which best describes the current atomic theory?
A patient arrives at an emergency room complaining of pain in her ankle. The nurse examines the patient’s ankle, looking for skin discoloration or swelling. The nurse is relying mostly on his knowledge of
Answer:
Superficial anatomy.
Explanation:
Superficial anatomy can be defined as the physical examination of the external parts of a living organism such as ankle, nose, skin, knee, toes, fingers, cornea etc.
Hence, superficial anatomy is also popularly referred to as surface anatomy.
In this scenario, a patient arrives at an emergency room complaining of pain in her ankle. The nurse examines the patient’s ankle, looking for skin discoloration or swelling. The nurse is relying mostly on his knowledge of superficial anatomy by studying or examining the patient's ankle for any sign of decoration or swelling on the skin.
2200 kg semi truck driving down the highway has lost control. The truck rolls across the median and into oncoming traffic. The truck collides with a 2000 kg car that is traveling north at 45 m/s. The two vehicles stick together creating a single wreck that travels south at 15 m/s. what was the initial speed and direction of the semi truck?
Answer:
The semi truck travels at an initial speed of 69.545 meters per second downwards.
Explanation:
In this exercise we see a case of an entirely inellastic collision between the semi truck and the car, which can be described by the following equation derived from Principle of Linear Momentum Conservation: (We assume that velocity oriented northwards is positive)
[tex]m_{S}\cdot v_{S}+m_{C}\cdot v_{C} = (m_{S}+m_{C})\cdot v[/tex] (1)
Where:
[tex]m_{S}[/tex], [tex]m_{C}[/tex] - Masses of the semi truck and the car, measured in kilograms.
[tex]v_{S}[/tex], [tex]v_{C}[/tex] - Initial velocities of the semi truck and the car, measured in meters per second.
[tex]v[/tex] - Final speed of the system after collision, measured in meters per second.
If we know that [tex]m_{S} = 2200\,kg[/tex], [tex]m_{C} = 2000\,kg[/tex], [tex]v_{C} = 45\,\frac{m}{s}[/tex] and [tex]v = -15\,\frac{m}{s}[/tex], then the initial velocity of the semi truck is:
[tex]m_{S}\cdot v_{S} = (m_{S}+m_{C})\cdot v -m_{C}\cdot v_{C}[/tex]
[tex]v_{S} = \frac{(m_{S}+m_{C})\cdot v - m_{C}\cdot v_{C}}{m_{S}}[/tex]
[tex]v_{S} = \left(1+\frac{m_{C}}{m_{S}} \right)\cdot v - \frac{m_{C}}{m_{S}} \cdot v_{C}[/tex]
[tex]v_{S} = v +\frac{m_{C}}{m_{S}}\cdot (v-v_{C})[/tex]
[tex]v_{S} = -15\,\frac{m}{s}+\left(\frac{2000\,kg}{2200\,kg} \right) \cdot \left(-15\,\frac{m}{s}-45\,\frac{m}{s} \right)[/tex]
[tex]v_{S} = -69.545\,\frac{m}{s}[/tex]
The semi truck travels at an initial speed of 69.545 meters per second downwards.
Identify the state of matter.
A)The molecules are a great distance apart, moving
very rapidly, with negligible interaction. The
substance occupies all the space available.
B)The molecules are only able to vibrate rapidly about
fixed positions. The substance does not need a
container to maintain its shape.
C)The molecules move about amongst each other,
with attractive forces between them. The substance
does not necessarily fill its container
Answer:
Gases
Solids
Liquids
Explanation:
A)The molecules are a great distance apart, moving very rapidly, with negligible interaction. The substance occupies all the space available.
Gases
The state of matter described above is for gases. The distances between gases are far apart and they have very weak intermolecular attraction. They have no fixed volume as they occupy any volume of space they are introduced into.
B)The molecules are only able to vibrate rapidly about fixed positions. The substance does not need a container to maintain its shape.
Solids
Solids have fixed shape and volume. They are held together in their fixed lattice and are only able to rapidly vibrate about their fixed positions.
C)The molecules move about amongst each other, with attractive forces between them. The substance does not necessarily fill its container.
Liquids
The state of matter described here are the liquids. Liquids flow amongst each other. The attractive force between them is greater than that of gases but lesser than those of solids.
A student pushed a box 27.0 m across a smooth, horizontal floor using a constant force of 113 N. If the force was applied for 9.00 s, how much power was developed, to the nearest watt? Round your answer to the nearest whole number.
The power is a dependent parameter on work done for a given interval of time. The magnitude of power developed due to the applied force is 339 W.
What is power?The rate of doing work is known as Power. Mathematically, the power is equal to the ratio of work and time interval.
Given data -
The distance covered by the box is, d = 27.0 m.
The magnitude of the constant force is, F = 113 N.
The time interval for the application of force is, t = 9.00 s.
The expression for the power developed is given as,
P = W/t
here, W is the work done and its value is, W = F × d.
Solving as,
P = F × d/t
Solving as,
P = 113 × 27.0/9.0
P = 339 W
Thus, we can conclude that the magnitude of power developed due to the applied force is 339 W.
Learn more about power output here:
https://brainly.com/question/13937812
An airplane is traveling at a speed of 200 m/s relative to the Earth. A person walks toward the front of the plane at a speed of 1 m/s. How fast is that person traveling in reference to the other people on the plane?
Answer:
1 m/s
Explanation:
This is because, everybody in the plane including the person walking is moving at the speed of the plane which is 200 m/s. Now, when the person starts to walk with a speed of 1 m/s, his relative velocity to the other passengers is 1 m/s since he is already moving at the speed of the plane before starting to walk.
His velocity relative to the ground V' = velocity of plane relative to ground, V + velocity of person relative to plane, v
V = 200 m/s and v = 1 m/s
So, V' = 200 m/s + 1 m/s = 201 m/s
Since the velocity of the other passengers is the velocity of the plane, V = 200 m/s. The velocity of the person traveling in reference to the other people on the plane is V" = V' - V = 201 m/s - 200 m/s = 1 m/s
If an object undergoes a change in velocity, then it also undergoes a change in:
Answer:
acceleration
Explanation:
If the velocity is not constant, then there must be a beginning and ending of its velocity. If that is so and there is also a change in time (which there must be) then there is a change in acceleration.
The formula for that is a = (vf - vi)/t
Answer:
probably acceleration
Explanation:
acceleration is the change in velocity
Why does a concave lense always form a virtual image?
Answer:
Concave lens spreads out light rays that are then refracted through it.: A concave mirror or a converging lens will only produce a virtual image at a point if the image is located beyond the focal point. By the focal point, we define the point that is more than one focal length away.
If a 1000 kg car is traveling at 3
meters per second, what is its
kinetic energy?
A solar panel gives our 250 Watts
of power in 2 seconds. How much
work did the solar panel do?
A cart falls from a track with an acceleration of 10 m/s2 (which is always the acceleration due to gravity). If it falls for 9 seconds before hitting the ground, what is it’s velocity at impact? (show work plz)
Answer:
90m/s
Explanation:
Given parameters:
Acceleration = 10m/s²
Time of fall = 9s
Unknown:
Final velocity = ?
Solution:
We can assume that the cart falls from rest.
Initial velocity = 0m/s
Using
v = u + gt
v is the final velocity
u is the initial velocity
g is the acceleration due to gravity
t is the time
v = 0 + 10 x 9 = 90m/s
Answer:
90m/s
Explanation:
please help, i only need help with 2,5, and 7
Answer:
2. Galaxy
5. Electromagnetic radiation
7. Particle Accelerator
Hi!! Does anyone know this answer? :D
Answer:
Im not fully corrrect but I would say C
Explanation:
What are the properties of photon
Answer:
I know they are stable, have no electrical charge, have interactions with electrons.
Explanation:
What must happen to an object in order to accelerate it?
Answer:
For an object to accelerate, appropriate force must be applied to the object to cause it to change it’s velocity if it’s already in motion. However, to cause it to overcome static friction if it is at rest, and cause it to change it’s velocity
Explanation:
Which type of matter is likely to absorb the most sound waves? A. Metal door B. Loudspeaker C. Hot air O D. Foam wall
Answer:
its either A or D
Explanation:
They use foam walls in like asylums but in the movies all the bad guys say "They can't hear you the metal is too thick" so its either one of those, hope it helped
Sound absorbing foams are typically softer and more lightweight than their sound blocking counterparts. This open and flexible cell structure acts as a natural soundwave absorber and prevents noises from reverberating off hard surfaces like walls, floors and ceilings.
What are sound waves ?"A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium (such as air, water, or any other liquid or solid matter) as it propagates away from the source of the sound. The source is some object that causes a vibration, such as a ringing telephone, or a person's vocal chords."
What is sound ?"Sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain."
What is noise ?Sound is defined as vibrations that travel through air or another medium that can be heard when they reach a person's or animal's ears. Noise is defined as unwanted sound. In engineering, noise has the additional connotation of signals varying over time without meaning, whereas sound connotes meaningful signals.
Know more about sound wave here
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You blow up a balloon but don't tie it. When you let it go, it flies around the room.
Which of Newton's Laws does the scenario describe?
1st Law
2nd Law
3rd Law
Answer:
3rd law beacuse there a flies
Please answer the following question (in image).
We are given:
Mass of object 1(m₁) = 3000 kg
Mass of object 2(m₂) = 4500 kg
Distance between their centers(r) = 1.5 m
Gravitational Attraction between the objects:
We know the formula:
g = G(m₁)(m₂) / r² ,where G is the universal Gravitational Constant and g is the force of attraction
g = (6.67 * 10⁻¹¹ * 3 * 10³ * 4.5 * 10³) / (1.5)²
g = [(6.67 * 3 * 4.5) * (10³⁺³⁻¹¹)] / 2.25
g = (90 * 10⁻⁵) / 2.25
g = 40 * 10⁻⁵ N
A hiker walks 5.0 kilometers due north for twenty minutes. He turns due west and travels 12 kilometers in 60 more minutes. Then he walks 7.0 kilometers due north in forty minutes. What is the average speed of the hiker when traveling north?
Answer:
The hikers average speed due north is 0.2 km per minute.
Explanation:
Speed is the ratio of distance moved by a body to the time taken.
i.e speed = [tex]\frac{distance}{time}[/tex]
Since the hiker walks due north and due west, then his average speed due north can be determined by;
Average speed = [tex]\frac{total distance due north}{total time taken}[/tex]
Total distance due north = 5.0 + 7.0
= 12.0 km
Total time taken = 20 + 40
= 60 minutes
= 1 hour
Average speed due north= [tex]\frac{12}{60}[/tex]
= [tex]\frac{1}{5}[/tex]
= 0.2
Average speed due north = 0.2 km/minute
The hikers average speed due north is 0.2 km per minute.
Questions
1 A stone falls from rest from the top of a high tower. Ignore
air resistance and take g = 10 m/s2
a What is its velocity after
() 15
(ii) 25,
(iii) 35,
(iv) 5s?
b How far has it fallen after
(i) 15,
(ii) 2s,
(iii) 35,
(iv) 5s?
2 An object falls from a hovering helicopter and hits the
ground at a speed of 30 m/s. How long does it take the
object to reach the ground and how far does it fall? Sketch
a velocity-time graph for the object (ignore air resistance).
Answer:
I am sorry i don't do physics
Which of these pairs of atoms are isotpoes? (Physical Science) Pair A Pair B Pair C # protons 6 8 5 2 12 12 # neutrons 8 8 5 3 13 14
Answer:
I guess that the atoms are:
Protons: 6 8 5 2 12 12
Neutrons: 8 8 5 3 13 14
Now, two atoms are isotopes if they share the same number of protons (so both atoms are the same element) but they have a different number of neutrons.
From the given options, the only two that have the same number of protons but a different number of neutrons are:
Protons 12, neutrons 13
and
Protons 12, neutrons 14.
These two are isiotopes.
Match each term with the appropriate definition.
mass
the amount of matter in an object
balance
the downward pull on an object due to
gravity.
weight
a tool used to measure weight
scale
a tool used to measure mass
Answer:
mass- the amount of matter in an object
balance- tool used to measure mass
scale- a tool used to measure weight
weight- the downward pull on an object due to gravity
If an object of 10kg has gained 300J of GPE, what height has the object gained
Planet Beta has two times a gravitational field strength and two times the mass of the Earth. How does the radius of planet beta compared with the radius of Earth
Answer:
rbeta=rearth
Explanation:
khan
Planet Beta has 2 times the gravitational field strength and 2 times the mass of the Earth.
How does the radius of planet Beta compare with the radius of Earth?
Answer: CORRECT (SELECTED
rBeta = rEarth
I need help please I will give points
Answer:
-5 N of force
Explanation:
Hope it helps!
What is a consequence that makes the behavior happen more frequently?
Punishment
Reinforcement
Reflex
Extinction
punishment is a consequence that makes the behavior happen more frequently.
please mark as brainleiest and follow me
Answer:
The correct answer on Grad Point is —Reinforcement
Explanation: I just got it WRONG from the above answer
What is the distance traversed by the particle between 0 seconds and 6 seconds?
Answer:
I dont know to be honest
Explanation:
i dont know to be honest
A solution is...
A. a mixture of two or more substances of the same state
B. a mixture of two or more substances. It is heterogeneous at the molecular level
C. a mixture of two or more substances. It is homogeneous at the molecular level
D. a mixture of two or more substances, one of which is water.
Answer:
C. a mixture of two or more substances. It is homogeneous at the molecular level
Can someone please help me?
Answer:
acceleration...............
Answer:
speed
Explanation:
wanna see some real speed betch
An astronaut sitting on the launch pad on Earth's surface is 6,400 kilometers from Earth's center and weighs 400 newtons. Calculate her weight when she reaches an altitude of 6,400 kilometers above the surface of Earth.
Answer:
weight at height = 100 N .
Explanation:
The problem relates to variation of weight due to change in height .
Let g₀ and g₁ be acceleration due to gravity , m is mass of the object .
At the surface :
Applying Newton's law of gravitation
mg₀ = G Mm / R²
At height h from centre
mg₁ = G Mm /h²
Given mg₀ = 400 N
400 = G Mm / R²
400 = G Mm / (6400 x 10³ )²
G Mm = 400 x (6400 x 10³ )²
At height h from centre
mg₁ = 400 x (6400 x 10³ )²/ ( 2 x 6400 x 10³)²
= 400 / 4
= 100 N .
weight at height = 100 N