The focus of community psychology is to improve the quality of one’s life through prevention and second order change.
Explanation:
Community psychology travels beyond an individual approach and integrates “social, cultural, environmental and international influences” to promote positive change. Additionally, it makes health and personal responsibility at the individual and system levels. It uses different psychological and external perspectives to address the attitudes and behavior of communities, their relationships and the people involved.
Community psychologists try to promote healthy and empowering groups and communities. They use concepts and knowledge from various disciplines, such as social, ecology, and intercultural psychology. Second-order change means paying attention to the system and structures that are involved in the problem to suit the human-environment good.
A ball of mass 0.16 kg is moving forwards at a speed of 0.50 m/s. A second ball of mass 0.10kg is stationary. The first ball strikes the second ball. The second ball moves forwards at a speed of
0.50 m/s.
What is the speed of the first ball after the collision?
Answer:
0.19 m/s
Explanation:
Momentum before collision = momentum after collision
m₁ u₁ + m₂ u₂ = m₁ v₁ + m₂ v₂
(0.16 kg) (0.50 m/s) + (0.10 kg) (0 m/s) = (0.16 kg) v₁ + (0.10 kg) (0.50 m/s)
0.08 kg m/s = (0.16 kg) v₁ + 0.05 kg m/s
0.03 kg m/s = (0.16 kg) v₁
v₁ ≈ 0.19 m/s
Final answer:
After applying the conservation of momentum principle to the collision, the final velocity of the first ball after the collision with the second stationary ball is calculated to be 0.1875 m/s.
Explanation:
The subject of this question is Physics, specifically the conservation of momentum during collisions. When analyzing collisions, we use the principle of conservation of momentum, which states that the total momentum of a closed system before the collision is equal to the total momentum after the collision, provided no external forces act on the system. In the scenario given, a 0.16 kg ball moving at 0.50 m/s hits a stationary 0.10 kg ball which afterwards moves forward at 0.50 m/s. To find the speed of the first ball after the collision, we can set the total initial momentum equal to the total final momentum:
Initial momentum = (0.16 kg * 0.50 m/s) + (0.10 kg * 0 m/s)
Final momentum = (0.16 kg * v) + (0.10 kg * 0.50 m/s)
By solving the equation, we can find the final speed v of the first ball. The solution involves isolating v on one side of the equation.
Calculation:
0.08 kg·m/s = (0.16 kg * v) + 0.05 kg·m/s
0.08 kg·m/s - 0.05 kg·m/s = 0.16 kg * v
0.03 kg·m/s = 0.16 kg * v
v = 0.03 kg·m/s / 0.16 kg
v = 0.1875 m/s
The final velocity of the first ball after the collision is therefore 0.1875 m/s.
An aircraft travelling at 600 km/h accelerates steadily
at 10km/h per second. Taking the speed of sound as
1100 km/h at the aircraft's altitude, how long will it take to
reach the 'sound barrier'?
Answer: 50.14 s
Explanation:
We can solve this problem by the following equation:
[tex]V=V_{o}+at[/tex] (1)
Where:
[tex]V=1100\frac{km}{h} \frac{1000 m}{1 km} \frac{1 h}{3600 s}=305.55 m/s[/tex] is the final velocity of the aircraft.
[tex]V_{o}=600\frac{km}{h} \frac{1000 m}{1 km} \frac{1 h}{3600 s}=166.66 m/s[/tex] is the initial velocity of the aircraft
[tex]a=2.77 m/s^{2}[/tex] is the acceleration of the aircraft (taking into account 10 km/h=2.77 m/s and acceleration is \frac{2.77 m/s}{1 s})
[tex]t[/tex] is the time it takes to the aircraft to reach the sound barrier
Isolating [tex]t[/tex] from (1):
[tex]t=\frac{V-V_{o}}{a}[/tex] (2)
[tex]t=\frac{305.55 m/s-166.66 m/s}{2.77 m/s^{2}}[/tex] (3)
Finally:
[tex]t=50.14 s[/tex] (4)
Is 02 a compound???????????????
Answer:
No' no its not
Explanation:
Oxygen in the atmosphere is a molecule because it contains molecular bonds. It is not a compound because it is made from atoms of only one element - oxygen.
No, 02 is not a compound. It represents the element oxygen (O) in its diatomic form. Diatomic molecules are formed when two atoms of the same element combine.
Explanation:No, 02 is not a compound. It represents the element oxygen (O) in its diatomic form. Diatomic molecules are formed when two atoms of the same element combine. In the case of oxygen, two oxygen atoms combine to form O2. So, 02 represents a molecule, not a compound.
Use the drop-down menus to complete each statement.
The amount of matter in an object is its
An action that has the ability to change an object's state of motion is
The rate at which velocity changes over time is
Answer:
mass , force , acceleration
Explanation:
edge 2021
The quantum of matter in an object is its mass.
An action that has the capability to change an object's state of stir is force.
The rate at which haste changes over time is acceleration.
The quantum of matter in an object is its mass. Mass is a measure of the volume of matter in an object.
An action that has the capability to change an object's state of stir is force. Force is defined as a drive or a pull on an object. It can beget an object to start moving, stop moving, speed up, decelerate down, or change direction.
The rate at which haste changes over time is acceleration. Acceleration is a measure of how snappily an object's haste changes. It can be positive, negative, or zero. However, it has positive acceleration, If an object's haste is increasing. However, it has negative acceleration, If its haste is dwindling. And if its haste isn't changing, it has zero acceleration.
Know further about acceleration,
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Why is graphite magnetic
Answer:
Graphite is actually diamagnetic. Pyrolytic graphite is commonly used with neodymium magnet cube arrays to float above it due to the graphite becoming a magnet with the same polarity as the field facing it so it repels.
Explanation:
please help please please please please
Answer:
Your answer would be B.
Explanation:
Ionic bonding involves transfer of electrons to complete the octet valence shell.
Please mark Brainliest if this helps!
Answer:
I think it is B
Explanation:
Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.
A wheelbarrow full of soil is being pulled to the right. Below the wheelbarrow is a free body diagram with 4 force vectors. The first vector is pointing downward, labeled F Subscript g Baseline = negative 800 N. The second vector is pointing left, labeled F Subscript f Baseline = negative 400 N. The third vector is pointing upward, labeled F Subscript N Baseline = 800 N. The fourth vector is pointing right labeled F Subscript t Baseline = 250 N. The up and down vectors are the same length. The vector pointing right is shorter than the vector pointing left.
Based on the free-body diagram, the net force acting on this wheelbarrow is
N.
The net force acting on this wheelbarrow is 250 N to the right.
Explanation:In the given free body diagram, we observe four force vectors acting on the wheelbarrow. The downward force (F subscript g) is -800 N, representing the gravitational force pulling the wheelbarrow downward. The leftward force (F subscript f) is -400 N, likely due to friction opposing the direction of motion. The upward force (F subscript N) is 800 N, corresponding to the normal force supporting the wheelbarrow against gravity. Finally, the rightward force (F subscript t) is 250 N, indicating the applied force pulling the wheelbarrow to the right.
To determine the net force, we consider both horizontal and vertical components. In the horizontal direction, the rightward force (F subscript t) is opposed by the leftward force (F subscript f), resulting in a net force of 250 N - 400 N = -150 N. This negative sign indicates the direction is to the left. In the vertical direction, the downward force (F subscript g) is balanced by the upward force (F subscript N), yielding a net force of 800 N - 800 N = 0 N.
The overall net force is a vector sum of the horizontal and vertical components. The horizontal net force of -150 N to the left combines with the vertical net force of 0 N, resulting in a net force of -150 N overall, directed to the left. Therefore, the net force acting on the wheelbarrow is 150 N to the left.
Which are examples of projectile motion?
Check all that apply.
A. An apple rolling across the grown in the northeast direction.
B. A skateboard sliding across a horizontal floor.
C. An arrow flying toward a target.
D. A football kicked into the air.
I'm pretty sure it's more than one answer to this question.
Answer:
C and D
Explanation:
an object that is projected at an angle where gravity is the only force acting on the object
There always are when it says "check all that apply".
For this one, C and D are the ones that apply.
List 3 different things a bus driver can do while driving to make the bus accelerate.
This is for a physics class for 9th grade.
Answer:
Step on the gas pedal (increase in speed).
Step on the brakes (decrease in speed).
Turn the steering wheel (change in direction).
A bus driver can make the bus accelerate by pressing the gas pedal, releasing the brakes, or changing to a higher gear.
To make the bus accelerate, a bus driver can perform several actions. Three ways a bus driver can cause the bus to accelerate are:
1. Pressing down on the gas pedal, which increases the engine's output and propels the bus forward, increasing its speed.
2. Releasing the brakes, if they were partially engaged, reducing the force opposing the bus's forward motion and allowing it to speed up.
3. Changing the gear ratio, if applicable, by shifting to a higher gear in vehicles with a manual transmission, which can increase acceleration at different speeds.