1: C
2: C
3: A
4: B
there you go
An object is moving east, and its velocity changes from 66 mvs to 26 mvs in 10 seconds. Which describes the
acceleration?
negative acceleration of 4 mvs
positive acceleration of 4 ms
positive acceleration of 9 m/a
negatlveo acceleration of 9 m/s
Answer:
negative acceleration of 4m/s²
Explanation:
Given parameters:
Initial velocity = 66m/s
Final velocity = 26m/s
Time taken = 10s
Unknown:
Description of the acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time.
It is mathematically expressed as;
acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
Now insert the parameters and solve;
Acceleration = [tex]\frac{26 - 66}{10}[/tex] = -4m/s²
So, we see a negative acceleration of 4m/s²
SOMEONE PLEASE HELP
Body composition analysis can accurately show changes in
O Fat mass
O Muscle mass
O Body fat %
O All of the above
Answer: all of the above
Explanation: Give brainliest please (first)
Point-source pollution enters water
A. from many different sites
B. from a specific location
C. slowly seeping through soil along pipelines
D. from unknown sources
A ray of light travelling obliquely from a rarer medium to a denser medium goes _______
Explanation:
towards the normal
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Formulas
Speed = distance / time
Time = distance / speed
Distance = speed x time
A bowling ball rolls 30 meters in 4 seconds. What speed did it travel?
distance = 30m
time = 45
speed = ?
Using s= d/t
7.5 m per second
which two things does force depend on?
Answer:
Mass and Gravity
Explanation:
Objects with mass exert forces on each other via the force of gravity. This force is proportional to the mass of the two interacting objects and is inversely proportional to the square of the distance between them.
What would happen if i build a bomb and destroy Pluto
Answer:
a what
well it wouldn't matter because it's not counted a planet anyway
Explanation:
Using the picture above, which ball has the greatest potential energy?
Ball 1 has the greatest amount of potential energy inside it because it has the maximum height among all the balls shown in the graph.
What is Potential energy?Potential energy is the stored energy which depends upon the relative position of various parts of a system. A spring has more potential energy when it is compressed or stretched due to external force.
Potential energy is not affected by the environment outside of the object or its system, such as the air or height. On the other hand, kinetic energy is the energy of an object or a system's particles in motion.
The potential energy of an object depends on the force acting on the two objects. For the gravitational force, the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity and h is the height in meters.
The object 1 has maximum height hence, it has greatest potential energy.
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The snow fell on me is my excuse so my mom won’t know that I’m getting bullied
Answer:
Aaaaw noooo. :(
Explanation:
what did they say to u and what state do u live in. I will help u stand up to them. I have taken down many bullies before by using words. in fourth grade, my friend was getting bullied by the class, then yelled and stood up for her. they all fell silent and never bullied her, or any of my friends again. For whatever reason they bully u is probably d.u.m.b. which means they r really d.u.m.b. Also, U should try finding out a lot of personal info about them that they dont want anyone to know. also tell the principal. Is ur mom nice, or mean? if shes nice, she'll support u and fight for u, which means u should address
Answer:
You should stick up for yourself because if you don't then no one else will but im always here to talk to you if you need someone
Explanation:
plzzzz help it for civics
Answer:
A : the colonists dumped tea in Boston Harbor
You have a 100 N object with a normal force of 100 N. You apply a 50 N push to the right, but a friend is hiding on the other side of the object and is also pushing with a force of 60 N. What is the net force on the object?
Answer:
100.49N
Explanation:
First we must know that the normal force acts in the vertical direction;
The force required to push to the right and left acts in the horizontal direction;
Sum of force along the horizontal Fx = 50N - 60 N = -10N
Force along the vertical Fy = 100N
The net force on the object is calculated as;
F = √(Fx)² + (Fy)²
F = √(-10)² + (100)²
F = √100 + 10000
F = √10,100
F = 100.49N
Hence the net force on the object is 100.49N
You are in a plane, and hit a bird as your flying, how can this impact produce a large impulse, despite the plane being much bigger
It effects the balance of the plane, and slows it. Also you are likely moving faster than the bird, and it would be almost as if you are hitting a brick. However when it makes the plane impulse then it means the sudden loss of speed (even if it is a small bird) that is keeping the plane in the air causes the planes engines to struggle for a short amount of time, while it tries to recover the little amount of speed it has lost (the engines HAVE to regain full speed or the plane will turn to the ground, maybe not ALL the way but it still will lower the nose.
Hope this helps,
Miri
what is a nuclear energy?
Answer:
Nuclear Energy is the energy released during nuclear fission or fusion, especially when used to generate electricity.
Hope this helped! Give me Brainiest
Which of the following objects in motion has the highest inertia?
A.) A 5.0 kg mass moving at 2.0 m/s
B.) A 8.0 kg mass moving at 9.0 m/s
C.) A 6.0 kg mass moving at 10. m/s
D.) A 15 kg mass moving at 2.0 m/s
Answer:
D.) A 15 kg mass moving at 2.0 m/s
Explanation:
The inertia of an object is most directly related to its mass and not the magnitude of the velocity.
So, the higher the mass of an object, the more its inertia.
According to Newton's first law of motion "an object will remain in its state of rest or of constant motion unless it is acted upon by an external force".
Inertia is the tendency of a body to remain in a state of rest either by virtue of its static position of constant motion. The larger the mass, the more this tendency. An object with a large mass will take more force to bring it from rest or change its motion.I WILL MAKE U BRAINLIEST PLEASE ANSWER !!!!!!!!
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Question: If you are traveling by train and the trip is 125 miles and takes 2 hours winding through the mountains, a) whats average speed? b) how would this be different if the train in each of the following situations- Train at rest, Train traveling at constant speed in a straight line, and the Train with a braking force (the train in the middle of coming to a stop)
PLEASE ANSWER ALL ASAP
Answer:
Average speed 62.5 miles an hour. If the train was traveling at a constant speed in a straight line it would be much faster on getting to its destination
Explanation:
please help asdfghjkll
Answer:
B
Explanation:
Its B because hurricanes are caused by hot water and and cold winds.
Earthquakes, tsunami's, and volcanoes are cause with something that is happening underground, with the mantle
where does reduction occur in an electrolytic cell
a. cathode
b. salt bridge
c. anode
d. wire
Answer:
The answer is actually a. Cathode
Explanation:
Just took the quiz
In an electrolytic cell, the reduction occurs at the cathode. So, the correct option is a.
What is meant by reduction ?Reduction is defined as the process through which a reactant gain electrons during a chemical reaction.
Here,
An electrolytic cell is an equipment that uses electric current to drive a redox reaction.
Redox reactions are the type of reaction that involves the transfer of electrons between the reactants. That means, in redox reactions, both oxidation and reduction occurs. The reactant that gains the electrons is said to be reduced and the one that losses the electrons is said to be oxidized.
In an electrolytic cell, cathode is the positively charged electrode. So, electrons are attracted towards it, and as a result, the cathode gets reduced.
Hence,
In an electrolytic cell, the reduction occurs at the cathode.
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An 80.0 kg fisherman jumps into a 37.5kg boat that is at rest. If the velocity of the fisherman is 5.60m/s when he jumps from the dock, what will be the velocity of the boat and fisherman after he lands in the boat?
Answer:
The velocity of the boat and fisherman after he lands in the boat is 3.812m/s
Explanation:
We will solve this question on the general Derivation for general case of a man jumping n the boat
m = Mass of the man = 80kg
M= mass of the boat 37.5kg
V(m, g) = Velocity of man with respect to ground = 5.6m/s
V(b , g) = Velocity of boat with respect to ground = Vo = 0m/s ( rest)
velocity of the boat and fisherman after he lands in the boat = V1
As there is no external force acting on the man then we can apply conservation of the Linear Momentum.
m*V(m, g) + M*Vo = (M+m)V1
[tex]V1 = \frac{ m*V(m, g) + M*Vo}{M+m}[/tex]
On substituting the values we get
V1 = [tex]\frac{80*5.6 + 37.5*0}{80+ 37.5}[/tex]
V1 = [tex]\frac{448}{117.5}[/tex] = 3.812 m/s
Therefore the velocity of the boat and fisherman after he lands in the boat is 3.812m/s.
In baseball/softball how many players play in the field at one time?
Answer:
10 players
Explanation:
the stolen valor act
Answer:
The Stolen Valor Act of 2005, signed into law by President George W. Bush on December 20, 2006, was a U.S. law that broadened the provisions of previous U.S. law addressing the unauthorized wear, manufacture, or sale of any military decorations and medals. The law made it a federal misdemeanor to falsely represent oneself as having received any U.S. military decoration or medal. If convicted, defendants might have been imprisoned for up to six months, unless the decoration lied about is the Medal of Honor, in which case imprisonment could have been up to one year. In United States v. Alvarez, the U.S. Supreme Court ruled that the Stolen Valor Act was an unconstitutional abridgment of the freedom of speech under the First Amendment, striking down the law in a 6 to 3 decision.
Explanation:
Plz di all plz i will give brainest and thanks to best answer do it right
1. Spring force is proportional to stretch distance, F=kd. Do you expect doubling the stretch distance double the force?
Yes
No
Answer:
Yes
Explanation:
The spring force is given as:
F = kd
F is the spring force
K is the spring constant
d is the magnitude of the stretch
Since k is a constant, therefore, doubling the stretch distance will double the force.
Both stretch distance and force applied can be said to be directly proportional to one another.
Answer:
Yes!
Explanation:
Descibe energy transtormations in your own words
Which of these is an example of electrical energy being converted to mechanical energy?
Group of answer choices
Sunlight used by plants in photosynthesis
Ceiling fan
Lightning striking the ground
Answer:
Ceiling fan
Explanation:
A ceiling fan is an example of electrical energy being converted to mechanical energy.
The blades of the fan are driven by motor within the system.
Energy in a system is converted from one form to the other. Energy is neither created nor destroyed as we know from the law of conservation of energy. In this regard, the electrical energy from the outlet powers the motor. As the motor inside the fan spins, the blade in turn begins to rotate. The motion of the blade is the expression of mechanical energy.HELP ASAP!!! How many electrons fit into each electron shell?
K
L
M
N
Answer:
k = 2
L = 8
M = 18
N = 32
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A person on a merry-go-round makes a complete revolution in about 3.17 s.
The radius of the ride is about 3.1 m, and the rider has a mass of 50 kg. What is the centripetal force on the rider?
1. 12.18 N
2. 245.0 N
3. 490.0 N
4. 608.9 N
Answer:
second one
Explanation:
HOPE THIS helps
A car travelling along a highway must uniformly reduce its velocity to 15 m/s in 3.5 s. The displacement during that time is 70m. What is the car's initial velocity? m/s (answer in 2 sig figs) What is the car's average acceleration? m/s2 (answer in 2 sig figs)
Answer:
a) What is the car’s average acceleration?
5.33 m/s^2 [Backward]
b) What is its initial velocity?
27.99 m/s [Foreward]
What is the thermal energy least to greatest
A cup of coffee
An ocean
An ice cube
A cooked turkey
A huge iceberg
Answer:
A huge ice berg
An ice cube
An ocean
A cup of coffee
A cooked turkey
A pendulum swings back and forth. Is there energy in the system?
Answer:
yes
Explanation:
A pendulum should be able to contain enough energy to constantly be moving
David is running laps around his apartment complex. Each lap is 1000 m. Starting from his front door and ending at his front door, David completes 4 laps of his complex. What is David's displacement?
Answer:
Displacement = 4000 m
Explanation:
Given that,
Each lap is 1000 m.
David completes 4 laps of his complex
We need to find David's displacement. In n laps, the net displacement is n time of distance covered.
Displacement = 4 × 1000
= 4000 m
Hence, Davis's displacement is 4000 m.