Answer:
The final velocity of the second car is 57 m/s south.
Explanation:
This is an elastic collision between two train cars. In this case, the total kinetic energy between the two bodies will remain the same.
The formula to apply is :
[tex]m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f[/tex]
where ;
[tex]m_1=mass of object 1\\v_1i=initial velocity object1\\m_2=mass of object2\\v_2i=initial velocity object 2\\v_1f=final velocity object 1\\v_2f=final velocity object 2[/tex]
Given in the question that;
[tex]m_1=14650kg\\v_1i=18m/s\\m_2=3825kg\\v_2i=11m/s\\v_1f=6m/s\\v_2f=?[/tex]
Apply the formula as;
[tex]m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f[/tex]
{14650*18}+{3825*11} = {14650 *6} + {3825 * v₂f}
263700+42075=87900 + 3825v₂f
305775 =87900 + 3825v₂f
305775-87900 = 3825v₂f
217875=3825v₂f
217875/3825 =v₂f
56.96 = v₂f
57 m/s = v₂f { nearest whole number}
Answer:
35 m/s south
Explanation:
took the test
what is meant by heat energy
Answer:
thermal
Explanation:
I think.Heat and thermal are the same
Answer: The biggest example of heat energy in our solar system is the sun itself. The sun radiates heat to warm us up on the planet earth. When the burner of a stove top is very hot, it is a source of heat energy. ... Automobile fuels such as gasoline are sources of heat energy, as is the hot engine of a race car or a school bus.
Explanation: Here are some explainations
How much time is required for a 20 Coulombs charge to flow through a point if the current is 2 amperes? help plzzzzz
The time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
What is electric current?Electric current is defined as the ratio of the charge flow in a given time interval. It is denoted by I. It has the unit is ampere.
The given data in the problem is;
t is the time is required
q is the charge = 20 Coulombs
I is the current is= 2 amperes
The formulas for the elctric current are given as;
[tex]\rm I = \frac{q}{t} \\\\\ \rm t = \frac{q}{I} \\\\ \rm t = \frac{20}{2} \\\\ t=10 \ sec[/tex]
Hence the time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
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The time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
What is electric current?Electric current is defined as the ratio of the charge flow in a given time interval. It is denoted by I. It has the unit is ampere.
The given data in the problem is;
t is the time is required
q is the charge = 20 Coulombs
I is the current is= 2 amperes
The formulas for the electric current are given as;
[tex]I=\dfrac{q}{t}[/tex]
[tex]t=\dfrac{q}{I}[/tex]
[tex]t=\dfrac{20}{2}[/tex]
[tex]t=10 sec[/tex]
Hence the time required for a 20 coulombs charge to flow through a point if the current is 2 amperes will be 10 seconds.
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HELP ME !!!
A basketball has a mass of 1 kg and is traveling 12 m/s.
What would happen to the velocity if the momentum of the basketball were cut in half?
It would be doubled.
It would be cut in half.
It would be the same.
It would be tripled.
Answer:
It would be cut in half.
Explanation:
If the momentum of the ball is cut into half, the velocity will also be halved.
The momentum of a body is the amount motion a body possess.
Momentum is given as;
momentum= m x v
Given that;
mass = 1kg
velocity = 12m/s
Now find the momentum;
momentum = 1 x 12 = 12kgm/s
Halving the momentum = 6kgm/s
mass = 1kg
Momentum = 1 x v
6 = 1 x v
v = 6m/s
We see that the velocity reduces by half
Answer:
It would be doubled.
Explanation:
I'm in K12
What are the stages of sleep apnea, what is worse
Answer:
Moderate apnea. Moderate apnea is defined as 15 to 29 episodes of apnea or reduced airflow to the lungs every hour. Symptoms may include drowsiness or falling asleep during activities that require some attention, such as attending a concert or a meeting. These symptoms may cause moderate problems with work or social functioning. Severe apnea.
Explanation:
aluminium is metal or metalloid
Answer:
Aluminium is just on the metal side of the border between metals and metalloids, so it is not considered to be a metalloid
Explanation:
it is a metal
Answer:
Aluminum-(Al) is a metal
For a straight line on a position-time graph, the slope of the line represents:
Group of answer choices
velocity
displacement
acceleration
distance
calculate the value of net force acting on given body?5N acting towards right & 15N force acting towards left on the brick.(draw fbd)
Answer:
The net force acting on the body is 10N directed to the left.
Explanation:
Magnitude of force to the right = 5N
Magnitude of force to the left = 15N
Net force acting on the object and in what direction;
Solution:
It is the vector sum of all forces acting on a body. This net force is the single force that will replace the forces acting on a body;
For the problem;
Net force = Force to the left + Force to the right
Let us take left to be negative and right to be positive;
Force to the left = -15N
Net force = -15N + 5N = -10N
The net force acting on the body is 10N directed to the left.
Momentum is a product of mass and....?
Answer:
Momentum is a product of mass and velocity.
Explanation:
Hope this helps you
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can anyone solve this?
Carol pushes down at an angle of 30 degrees from the vertical on a 10.0 kg wood crate causing the crate to move across a wood floor at a constant velocity of 2.0 m/s. How much force does Carol exert on the crate? (μs = 0.5 and μk = 0.2)
Answer:
F = 39.2 N
Explanation:
Since, the object is in uniform motion. Therefore, the frictional force on object will be:
Frictional Force = μk N = μk mg
where,
μk = coefficient of kinetic friction = 0.2
m = mass of crate = 10 kg
g = 9.8 m/s²
Therefore,
Frictional Force = (0.2)(10 kg)(9.8 m/s²)
Frictional Force = 19.6 N
The horizontal component of force must be equal to this frictional force to continue the uniform motion:
F Sin 30° = 19.6 N
F = 19.6 N/Sin 30°
F = 39.2 N
It will take 3000 Joules of energy to push a large moving box up a ramp and into the back of a truck in 10 mins. If the length of the ramp is 15 meters, how much force will be required to accomplish this task?(include the units)
Answer:84
Explanation:
To solve this we must be knowing each and every concept related to force. Therefore, 200N is the force that will be required to accomplish this task.
What is force?When applied, force is described as an external source that alters or tends to modify the condition of the body. If indeed the body is moving this should come to rest, but if it is at rest, it will move. It can also induce changes in the body's orientation, form, size, and so on.
One example is pushing or shoving a door with force. Vector quantity, which means it has a magnitude as well as a direction. Newton's second law states that force is defined as the "product of such a body's acceleration and mass.
energy = 3000 Joules
time=10 mins
length = 15 meters
work= energy=force ×length
force ×15= 3000
force =200N
Therefore, 200N is the force that will be required to accomplish this task.
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Question 1
What are the parts of Earth's mantle?
-Inner core, asthenosphere, lithosphere
-Lithosphere, asthenosphere, mesosphere
-Crust, lithosphere, asthenosphere
-Mesosphere, asthenosphere, troposphere
Question 2
Two students below described a type of Earth's outermost layer:
Student A: 5–12 kilometers deep
Student B: Makes up the sea floor
Which type of outermost layer did the students describe?
-They both described the oceanic type.
-They both described the continental type.
-Student A described the oceanic type and Student B described the continental type.
-Student A described the continental type and Student B described the oceanic type.
Question 3
If Earth was like a hardboiled egg, which part of Earth would the egg shell represent and why?
-Crust, as its depth is up to 3,000 kilometers
-Mantle, as its depth is up to 3,000 kilometers
-Mantle, as its depth is less than 100 kilometers
-Crust, as its depth is less than 100 kilometers
Question 4
What forces the inner core of Earth to remain solid?
-Lack of water
-Low temperature
-Low density
-High pressure
Answer:
1.- the lithosphere, asthenosphere, and mesosphere.
2.- They both described the oceanic type.
3.- Crust, as its depth is less than 100 kilometers
4.- High pressure
☺️
A chemical change can be represented by ____________ changing into _____________ in a ________________.
A. Products, reactants, chemical reaction
B. Chemical reaction, reactants, products.
C. Chemical reaction, products, reactants
D. Reactants, products, chemical reaction
Answer:
I don't know but I explain some of it as best as I can
Explanation:
Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products can be elements or compounds. Bonds break in the reactants and new bonds form in the products.
The weight of an object is determined by it X
. ?
Mass
Gravity
Height
Both A&B
Answer:
gb tbbyeyb
Explanation:
what will you always find in ALL atoms?
Answer:
All atoms have a dense central core called the atomic nucleus. Forming the nucleus are two kinds of particles: protons, which have a positive electrical charge, and neutrons, which have no charge. All atoms have at least one proton in their core, and the number of protons determines which kind of element an atom is.
Explanation:
Inside a car that was at 273 K, a bottle with a pressure at 100,000 pascals warms up to
350 K. If the volume of the bottle remains constant, what is the pressure, in pascals,
inside the hot water bottle?
Answer:
P2 = 128,205 pascal.
Explanation:
Given the following data;
Original Pressure, P1 = 100,000 pascals
Original Temperature, T1 = 273K
New Temperature, T2 = 350K
To find new pressure P2, we would use Gay Lussac' law.
Gay Lussac's law states that when the volume of an ideal gas is kept constant, the pressure of the gas is directly proportional to the absolute temperature of the gas.
Mathematically, Gay Lussac's law is given by;
[tex] PT = K[/tex]
Where;
P represents pressure. T represents temperature. K is the constant of proportionality.[tex] \frac{P1}{T1} = \frac{P2}{T2}[/tex]
Making P2 as the subject formula, we have;
[tex] P_{2}= \frac{P1}{T1} * T_{2}[/tex]
Substituting into the equation, we have;
[tex] P_{2}= \frac{100000}{273} * 350[/tex]
[tex] P_{2}= 366.3004* 350[/tex]
P2 = 128205.13 ≈ 128205 pascal.
Therefore, the pressure inside the hot water bottle is 128,205 pascal.
What is the equivalent resistance of the circuit?
Answer:
5.5Ω
Explanation:
The circuit diagram shown is a parallel arrangement. To solve this problem for the equivalent resistance,
R1 = 10Ω
R2 = 20Ω
R3 = 30Ω
For circuits in parallel, equivalent resistance is ;
[tex]\frac{1}{Rt}[/tex] = [tex]\frac{1}{R1} + \frac{1}{R2} + \frac{1}{R3}[/tex]
Now insert the parameters and solve;
[tex]\frac{1}{Rt}[/tex] = [tex]\frac{1}{10} + \frac{1}{20} + \frac{1}{30}[/tex]
[tex]\frac{1}{Rt}[/tex] = [tex]\frac{6 + 3 + 2}{60}[/tex]
[tex]\frac{1}{Rt}[/tex] = [tex]\frac{11}{60}[/tex]
Rt = 5.5Ω
If a water balloon is launched with an initial velocity of 30.1 meters per second, at an angle of 24 degrees above horizontal, how much time will it take the balloon to reach the ground again?
Please provide an explanation as well.
Answer:
t = 24.48/10 will = 2.45 sec
The time taken to reach the ground if, a water balloon is launched with an initial velocity of 30.1 meters per second, at an angle of 24 degrees above horizontal is 2.5 seconds.
What is velocity?When an item is moving, its velocity indicates how quickly its location is changing as seen from a specific point of view and as measured by a specific unit of time.
If a point travels a specific distance along its path in a predetermined amount of time, its average speed throughout that time is equal to the traveled distance divided by the travel time. For instance, a train traveling 100 km in two hours is moving at an average speed of 50 km/h.
Given:
The initial velocity, v = 30.1 m/s
The angle of projection, a = 24°,
Calculate the time taken to reach the ground as shown below,
Time = 2vsina / g
Time = 2 × 30.1 × sin24 / 9.8
Time = 60.2 × 0.406 / 9.8
Time =24.485 / 9.8
Time = 2.499 or 2.5
Thus, the time taken to reach the ground is 2.5 seconds.
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which other element is most likely to be a non-reactive gas
A. Na, number 11
B. F, number 9
C. Cs, number 55
D. Xe, number 54
Answer:
C
Explanation:
What would happen if the compass were moved to the location of the black X
in the diagram?
Me Magnets
O A. The arrows on the magnetic field lines would point in the opposite
directions.
B. The locations of the magnet's north and south poles would switch.
C. The red part of the compass needle would point toward the
magnet's south pole.
D. The red part of the compass needle would point in the opposite
direction
Answer:
It is C
Explanation:
The red part of the compass needle would point toward the magnet's south pole.
What is compass?A compass is a tool used for geographic orientation and navigation that displays the cardinal directions. It typically consists of a magnetized needle or other component that may pivot to line up with magnetic north, like a compass card or compass rose.
Compass is a device used to find the direction north and south it is aligned with direction of magnetic field of earth.
The red part of the compass needle would point toward the magnet's south pole.
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What is the value of the initial horizontal velocity?
Initial Velocity is the velocity at time interval t = 0 and it is represented by u. It is the velocity at which the motion starts.
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What are the most important methods and instruments used to predict volcanic eruptions?
How do I learn the basics of physics
The car's initial speed was 15 m / s and the distance the car travels before it comes to a complete stop after the driver applies the brakes is 63m. What is the magnitude of the car's acceleration?
Initial speed of the car (u) = 15 m/s
Final speed of the car (v) = 0 m/s (Car comes to a complete stop after driver applies the brake)
Distance travelled by the car before it comes to halt (s) = 63 m
By using equation of motion, we get:
[tex] \bf \longrightarrow {v}^{2} = {u}^{2} + 2as \\ \\ \rm \longrightarrow {0}^{2} = {15}^{2} + 2 \times a \times 63 \\ \\ \rm \longrightarrow 0 = 225 + 126a \\ \\ \rm \longrightarrow 126a = - 225 \\ \\ \rm \longrightarrow a = - \dfrac{225}{126} \\ \\ \rm \longrightarrow a = - 1.78 \: m {s}^{ - 2} [/tex]
[tex] \therefore [/tex] Acceleration of the car (a) = -1.78 m/s²
Magnitude of the car's acceleration (|a|) = 1.78 m/s²
A student hangs the south pole of a bar magnet near the north pole of
another hanging bar magnet. What do the magnets do?
A. They move away from each other.
B. They move away from each other, then toward each other.
C. They move toward each other.
O D. They do not move.
When the south pole of a bar magnet is near the north pole of another bar magnet, they move toward each other. Therefore, option (C) is correct.
What is a magnet?A magnet can be described as a substance that creates a magnetic field and this magnetic field is the reason for the considerable properties of a magnet. The magnetic force pulls ferromagnetic materials, such as iron, cobalt, etc., and attracts or repels other magnetic substances.
A permanent magnet is composed of a material that is magnetized and produces its own magnetic field such material can be magnetized, and strongly attracted towards a magnet, is known as ferromagnetic, and contain the elements iron, and cobalt.
Each bar magnet possesses a set of North and South poles within them. The south pole of one magnet brings closer to the north pole of another magnet they attract each other and move toward each other.
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When a toy car is moving down a ramp, what forces are acting on it (gravity, tension, spring, friction, air, normal, applied)?
A construction crew must use a lever to lift a boulder. The mechanical advantage of the lever is 6 and the lever applies a force of 1600 N to the rock. What is the force that the construction crew must apply to the lever?
Answer:
The force the construction crew must apply to the lever is 266.67 N
Explanation:
Mechanical advantage is the measure of the ratio of output force to input force in a system. Hence, mechanical advantage (MA) is given by the formula
[tex]MA = \frac{F_{o} }{F_{i} }[/tex]
Where MA is the mechanical advantage
[tex]F_{o}[/tex] is the output force
and [tex]F_{i}[/tex] is the input force
From the question, the mechanical advantage of the lever is 6
That is, MA = 6
and the lever applies a force of 1600 N to the rock
That is, Output force, [tex]F_{o}[/tex] = 1600 N
To determine the force the construction crew must apply to the lever, that is the input force, [tex]F_{i}[/tex]
From
[tex]MA = \frac{F_{o} }{F_{i} }[/tex]
We can write that
[tex]F_{i} = \frac{F_{o} }{MA}[/tex]
Then,
[tex]F_{i} = \frac{1600N}{6}[/tex]
[tex]F_{i} = 266.67 N[/tex]
Hence, the force the construction crew must apply to the lever is 266.67 N.
The force that the construction crew must apply is 266.67 N.
A machine is a device in which the effort applied at one end is used to overcome a load at another end. The mechanical advantage is the ratio of load to effort of a machine.
We have the following information;
Mechanical advantage (MA) = 6
Load = 1600 N
Effort = ?
Substituting values;
6 = 1600N/Effort
Effort = 1600N/6
Effort = 266.67 N
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Un cuerpo viaja con una velocidad de 10 m/sg luego incrementa hasta 15 m/sg, este incremento fue durante 0 sg a 10 sg, ¿Cuál es la aceleración del cuerpo?
Answer:
Acceleration, [tex]a=0.5\ m/s^2[/tex]
Explanation:
The question says " A body travels with a speed of 10 m / s then increases to 15 m / s, this increase was during 0 s to 10 s, what is the acceleration of the body? ".
Initial speed, u = 10 m/s
Final speed, v = 15 m/s
Time interval, t = 10 s
We need to find the acceleration of the body. It is equal to the rate of change of velocity. It can be given by the formula as follows :
[tex]a=\dfrac{15-10}{10}\\\\a=0.5\ m/s^2[/tex]
So, the acceleration of the body is [tex]0.5\ m/s^2[/tex].
What is energy saving..Write any three methods of saving energy..
Answer:
Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service. This can be achieved either by using energy more efficiently (using less energy for a constant service) or by reducing the amount of service used (for example, by driving less).
Explanation:
23 POINTS
Sally and Ann are trying to move a box across the floor. Sally is pushing the box to the right with a force of 100N and Ann is pulling the box with a force of 50N to the right. What is the magnitude and direction of the box?
50N to the left
150N to the right
50N to the right
The box is balanced and will not move
Answer: 150N to the right...
Force acting on the box applied by Sally, F1= 100 N (right side)
Force acting on the box applied by Ann, F2= 50 N (right side)
It is clear that the two forces are acting on same direction. Let right side is positive direction. So, F= F1 + F2
F= 100+50
F=150 N
The direction of the box is towards the right side. So, the correct option is 150 N to the right... Hope this helps... Plz mark me brainliest.... Stay safe and have a great weekend!!! :D
why people bleed from nose while climbing uphill rapidly
Answer:
Explanation:
Nosebleeds can be caused by being up in a very high altitude. As you climb higher, the amount of oxygen in the air decreases. This makes the air thinner and dryer, which can in turn cause the inside of your nose to crack and bleed.
