Answer:
B
Explanation:
A 2.2 kg rat floating in space pushes a piece of cheese away from himself at 10 m/s. The cheese has a mass of 1.1 kg. What is the velocity of the rat after he pushes the piece of cheese?
20 m/s
5 m/s
10 m/s
The rat doesn't move
Answer:
The velocity of the rat after he pushes the cheese is 5 m/s
Explanation:
The question relates to the Law of conservation of linear momentum, which states that the total momentum in an isolated system is constant
The given parameters are;
The mass of the rat, floating, m₁ = 2.2 kg
The velocity with which the rat pushes the cheese away from himself, v₃ = 10 m/s = The final velocity of the cheese
The mass of the cheese, m₂ = 1.1 kg
Assuming that the initial velocity of the rat, v₁ = The initial velocity of the rat, v₂ = 0 m/s
Let, 'v₄', represent the velocity of the rat after he pushes the cheese, by the law of conservation of linear momentum we have;
The total initial momentum = The total final momentum
The total initial momentum = m₁·v₁ + m₂×v₂ = 2.2 kg × 0 m/s + 1.1 kg × 0 m/s = 0 kg·m/s
The total initial momentum = 0 kg·m/s
The total final momentum = m₁·v₄ + m₂×v₃ = 2.2 kg × v₄ + 1.1 kg × 10 m/s = 2.2·v₄ kg·m/s + 11 kg·m/s
The total final momentum = 2.2·v₄ kg·m/s + 11 kg·m/s
By the equality of the total initial momentum and the total final momentum, we have;
0 kg·m/s = 0 = 2.2·v₄ kg·m/s + 11 kg·m/s
2.2·v₄ kg·m/s + 11 kg·m/s = 0
2.2·v₄ kg·m/s = -11 kg·m/s
v₄ = -11 kg·m/s/(2.2 kg·m/s) = 5 m/s
The velocity of the rat after he pushes the cheese = v₄ = 5 m/s.
Learning Task 2: Prepare a basin with half-filled water and stone. Drop a stone
into the basin and observe what will happen. Write your answers in your
answer sheet.
1. What happens when you drop the stone?
2. What causes the ripples to form?
3. How far does the ripple continue?
Answer:
1 . What happens when you drop the stone?
Depending on the weight from which the stone was dropped, the glass might well break
2 depending on the size and weight and shape on the stone the glass might well break
3 depending on the density on the stone the stone might when float on the water
Explanition :
GIVE ME BRAINLESS PLEASE !!
The experiments are performed to check the observation of the theory.
The basin is filled with water to check the following observation in the question.
The answers are as follow:-
When you dropped the stone in the water, the water comes out from the basin which is equal to the weight of the stone.2. The impact of stone created the ripple. The magnitude of the ripple depends on the height at which stone it was thrown.
3. The ripple goes far as the weight of the stones
These are the answer to the following.
For more information, refer to the link:-
https://brainly.com/question/2127750
8-30-2018 what phase change occurs as the substance at 0 degree c has its pressure dropped from 0.50 at to 0.25 atm
Answer:
at T = 0ºC the change of state is from the solid state to the gaseous state
Explanation:
In this exercise we are asked about the changes of state, from the data we will assume that the material is water.
Water can exist in three solid states, liquid and gas, in a graph of pressure ℗ against temperature (T) there is a point called triple at T = 0.01ºC, below this point the curve has two states at high pressure solid and low pressure gas.
As a result of the previous ones at T = 0ºC the change of state is from the solid state to the gaseous state
Increasing friction is necessary for which of the following?
A) free wheel of bicycle
B) Chain of bicycle
C) Bicycle handle bar
D) ball bearing in front wheel
Answer:
simple answer is C ok you
energy transformation in wound spring of a toy car?
give your own answrr
Answer:
The work done in winding the spring gets stored in the wound up spring in the form of elastic potential energy (i.e potential energy due to change in shape). ... During this process, the potential energy stored in it gets converted to kinetic energy. This turns the wheels of the toy car.
Explanation:
Answer:
Both elastic potential energy and kinetic energy at t initial are converted to internal energy t f.
Explanation:
Apply the principle of Conservation of Energy to the system, where friction is present. Between t i and t f, the elastic potential energy in the spring and the kinetic energy of motion are being transformed into internal energy.
(I can't put t and f together because it got censored so that's why there is a space. Usually they are together.)
Please help me on this
Answer:
2nd option is the correct answer
In your own words, explain what a field is in science. Use specific examples to support your explanation.
Answer:
Field, In physics, a region in which each point is affected by a force.
Explanation:
A vehicle travels a distance of 300km. It took the vehicle 6 hours to make the trip.
What is the speed of the vehicle?
Answer:
50 kmph
Explanation:
300 / 6 = 50
Which three characteristics do mechanical waves and electrocmagnetic
waves share?
O A. The waves and their energy can travel through empty space.
B. The waves transfer energy from its source.
O C. The waves begin with a disturbance.
O D. The waves and their energy move outward from the source.
a body has weight 20N how much force is required to move it vertically upwards with an acceleration of 2m/s
Given :-Weight = 20 NAcceleration = 2 m/sTo Find :-Force applied=?Solution :-
As we know that,
F = maF is the Force appliedM is the MassA is the AccelerationAccording to the question,
F = 20 × 2
F = 40 N
Hence :-Force applied is 40 N
Know More :-First equation of motionv = u + atSecond equation of motions = ut + ½at²Third Equation of motionv² - u² = 2as[tex]\begin{gathered} \\ \end{gathered}[/tex]
An object raised above the ground is an example of which type of potential
energy?
A. Gravitational
B. Elastic
C. Magnetic
D. Mechanical
Answer:
Mechanical????????????
What is the net force on the block shown above?
Fapp =25N, FG =60N
Fapp =95N, FG =60N
Fapp =60N, FG =25N
Fapp =60N, FG =95N
Answer:
What is the net force on the block shown above?
★F(app) =25N, F(G) =60N
★F(app) =95N, F(G)=60N✓
★F(app) =60N, F(G) =25N
★F(app) =60N, F(G) =95N
Explanation:
Net Force 60N Right
→F(app) = 60+F(frict) = (60+35) = 95 N
→F(N)= F(G) = 60 N
In which direction of the wave motion do longitudinal waves transfer energy?
perpendicular
parallel
close
equal
Answer: definitely parallel !
Explanation: Hope This helps!
Answer:
B:parallel
Explanation:
just finished cumulative exam and this was a question
3. A cannon with a 200 cm long barrel applies a constant force of 120 N
over the length of the barrel. If a monkey shoots the 2.7 kg cannonball
straight up, what is the maximum height it reaches?
Answer:
the answer is 9.07m.
Explanation:
First you need to find the velocity of the ball leaving the cannon.
F=MA
F due to gravity = -2.7*9.8 if the cannon is pointed straight up
120-2.7*9.8=2.7*A
What is not a common feature of both the MMPI-2 and CPI?
what is acceleration?
Answer:
Acceleration is the rate of change of velocity.
•when there is no temperature difference between a substance and its surroundings, no net energy is transferred as heat
A.true
B.false
Answer:
A. True
Explanation:
It is true that when there is no temperature difference between a substance and its surrounding, no net energy is transferred as heat.
The term used for this is thermal equilibrium. Thermal equilibrium occurs when two substances or even places are at the same temperature.
For heat to flow a gradient must be set up. The gradient implies that one part is at a higher temperature than the other. So, the system then works till thermal equilibrium is attained. Heat generally moves from a hotter to a colder body. When both bodies are at even or equal temperature, then heat stops moving.Physical quantity are measurable quantities
Answer:
yeah physical quantities are the quantities which can be meaured
fill in the blanks.
1. The process of weathering
depends on the rock.........
Climate.
Answer:
the answer is dry region climate
Explanation:
I hope it will help you
Answer:
the answer is dry region climate
Explanation:
hope it helps
Please select the word from the list that best fits the definition
Choose the correct process for the description given:
Process that breaks down glucose to create two molecules of pyruvic acid (pyruvate)
1) Glycolysis
2) Lactic Acid Fermentation
3) Alcoholic Fermentation
4) The Krebs Cycle
5) Electron transport chain
Answer:
glycolysis is the answer to the question
8. Fig. 4.1 shows a heavy ball B of weight W suspended from a fixed beam by two ropes P and Q.
P and Q are both at an angle of 45° to the horizontal. The tensions in P and Q are each 30 N.
a. In the space below, draw a scale diagram to find the resultant of the tensions
in P and Q. Use a scale of 1.0cm to represent 5.0 N. Label the forces and show
their directions with arrows.
Answer:
The resultant tension of the two ropes is approximately 42.4 N
The length of the line representing the resultant tension is approximately 8.48 cm
Please find included with the answer the scale drawing created with Microsoft Word
Explanation:
The given parameters are;
The tension in rope P, [tex]T_P[/tex] = 30 N
The tension in rope Q, [tex]T_Q[/tex] = 30 N
The angle the rope, 'P', makes with the horizontal = 45°
The angle the rope, 'Q', makes with the horizontal = 45°
The scale factor of the scale diagram, S.F. = 5.0 N/cm
By the resolution of forces at equilibrium, we have;
The sum of the vertical forces, [tex]\Sigma F_y[/tex] = [tex]T_P_y[/tex] + [tex]T_Q_y[/tex] + W = 0
∴ W = -([tex]T_P_y[/tex] + [tex]T_Q_y[/tex])
W = -(30 × sin(45°) + 30 × sin(45°)) = -42.4264068712
The weight of the heavy ball, W ≈ 42.4 N acting downwards
The sum of the horizontal forces, [tex]\Sigma F_x[/tex] = [tex]T_P_x[/tex] + [tex]T_Q_x[/tex] = 0
The length of the resultant force, W = W/(S.F.) ≈ 42.4 N/(5.0 N/cm) = 8.48 cm
The drawing of the vectors using the scale factor of 5.0 N/cm is created using Microsoft Word is included
In which situation are waves transmitted?
Answer:
In electromagnetic waves.
Explanation:
Energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. In water waves, energy is transferred through the vibration of the water particles.
Answer:
It's C 100% accurate.
Explanation:
A cart was allowed to roll down a ramp from rest. It reached the bottom of the ramp
with a speed of 25 cm/s. A student could conclude that the cart -
a.gained mass
b.accelerated down the ramp
c.lost energy
d.moved at a constant speed
Answer:
accelerated down the ramp
Explanation:
It can be concluded that the cart accelerated down the ramp is the correct choice.
Acceleration is the rate of change of velocity with time.
We see that as time increases, the velocity of the car also increase.
Initially, the car is at rest with a velocity of 0cm/s. With the passage of time, as it slides down the ramp, the velocity increases to 25cm/s.
Since acceleration is the rate of change of velocity with time, it is glaring that the acceleration of the body greatly increased as it moves down the ramp
URGENT‼
Physics Angled Projectile
Answer:
5. 0.5 m/s
6. 2.06 m/s
7. 0.22 m
Explanation:
From the question given above, the following data were obtained:
Horizontal range (Rₓ) = 0.21 m
Time of flight (T) = 0.421 s
Time (t) to reach the top = 0.2105 s
5. Determination of the horizontal velocity of the ball.
Horizontal range (Rₓ) = 0.21 m
Time of flight (T) = 0.421 s
Horizontal velocity (vₓ) =?
Rₓ = vₓ × T
0.21 = vₓ × 0.421
Divide both side by 0.421
vₓ = 0.21 / 0.421
vₓ = 0.5 m/s
Thus, the horizontal velocity is 0.5 m/s.
6. Determination of the initial vertical velocity of the ball.
Time (t) to reach the top = 0.2105 s
Final vertical velocity (vբᵧ) = 0 m/s
Acceleration due to gravity (g) = 9.8 m/s²
Initial vertical velocity (vᵢᵧ) =?
vբᵧ = vᵢᵧ – gt (ball is going against gravity
0 = vᵢᵧ – (9.8 × 0.2105)
0 = vᵢᵧ – 2.06
Collect like terms
0 + 2.06 = vᵢᵧ
vᵢᵧ = 2.06 m/s
Thus, the initial vertical velocity of the ball is 2.06 m/s.
7. Determination of the maximum height reached by the ball.
Time (t) to reach the top = 0.2105 s
Acceleration due to gravity (g) = 9.8 m/s²
Maximum height (h) =?
h = ½gt²
h = ½ × 9.8 × 0.2105²
h = 4.9 × 0.2105²
h = 0.22 m
Thus, the maximum height reached by the ball is 0.22 m
Calcula la aceleracion de un cuerpo que genera una fuerza de 230N si consideramos que tiene una masa de 17kg
Answer:
the acceleration is 13.53m/s^2
Explanation:
The computation of the acceleration is given below:
As we know that
Total force = Mass × acceleration
where
Total force is 230 N
And, the mass is 17 kg
So, the acceleration is
= 230 ÷ 17
= 13.53 m/s^2
hence, the acceleration is 13.53m/s^2
Behaviors never come back once they have been extinguished. Please select the best answer from the choices provided T F
Answer:
False.
Explanation:
Behavior modification is a therapeutic process that is focused on changing any undesirable negative behavior in an individual through the use of positive or negative consequence and biofeedback.
This simply means that, behavior modification typically involves the process in which a desired behavior is reinforced while withholding reinforcement for any undesired behaviors.
Behavior modification is typically based on operant conditioning principles, through negative or positive reinforcement, undesirable behaviors developed by an individual are mainly replaced with more desirable ones.
Hence, behavior modification can be used to correct human behaviors or disorders such as enuresis (bed-wetting), Obsessive-Compulsive Disorder (OCD), generalized anxiety disorder, Attention-Deficit/Hyperactivity Disorder (ADHD), phobias, etc.
However, behaviors can still come back or be exhibited by an individual even if they have been extinguished through operant conditioning.
Operant conditioning can be defined as an associative learning process which involves reinforcing the strength of a behavior.
Answer:
Flase
Explanation:
edge2021
An object with a mass of 40 kg is acted on by a net force of 680 N.
Determine the acceleration of the object.
Answer:
The acceleration of the object is [tex]17\ m/s^2[/tex]
Explanation:
Force
Newton's second law states the net force exerted by an external agent on an object of mass m is:
F=m.a
Where a is the acceleration produced on the object. The acceleration can be calculated by solving for a:
[tex]\displaystyle a=\frac{F}{m}[/tex]
We have an object with a mass of m=40 kg that is acted on by a net force of F=680 N.
Calculate the acceleration:
[tex]\displaystyle a=\frac{680\ N}{40\ kg}[/tex]
Calculating:
[tex]a = 17\ m/s^2[/tex]
The acceleration of the object is [tex]17\ m/s^2[/tex]
Which is easier for a beginner? (This is for archery)
O long bow
O recurve bow
Answer:
The recurve bows
Explanation:Vote brainliest plz
1 A ball is rolling along the floor with a constant velocity of 8 m/s. How far will it have gone after
56 seconds?
Answer:
448 meters
Explanation:
every second it moves 8 meters, so all you have to do is multiply 56x8 or 8x56 either way it is the same thing and you will get the same answer
The ball would have covered a distance of 448 m in 56 seconds.
We know the following;
Velocity of the ball = 8 m/s
time taken = 56 seconds
Also;
velocity = distance (m)/ time(s)
We now have to substitute the values into the equation hence;
8 m/s = distance/ 56 seconds
Distance = 8 m/s × 56 seconds
Distance = 448 m
Learn more about velocity: https://brainly.com/question/862972
How long does it take a car traveling at 45km/h to travel 100 m
Explanation:
[tex]45 \frac{km}{hr} \times \frac{1000m}{1km} = 45000 \frac{m}{hr} \\ \frac{100m}{45000 \frac{m}{hr} } = \frac{1}{450} hr \\ \frac{1}{450} hr \times \frac{60mins}{1hr} = \frac{2}{15} mins = 0.133mins[/tex]
