Answer:
324 J
Explanation:
KE= 1/2 m*v^2
1/2*8*9^2
324 joules (=^w^=) woof woof
What is the momentum of a 4 kg object moving west at 4 m/s?*
O 12 kg*m/s (east)
O 1.33 kg*m/s (west)
O 16 kg*m/s (east)
16 kg*m/s (west)
Answer:
16kg*m/s west
Explanation:
P=M*V
Momentum= Mass time velocity, plug it into the formula,
M is 4 and V is 4, 4*4=16, and since the object is moving west its going to be west.
basically saying in simpler terms,
16=4*4
In the system shown above, the pulley is a uniform disk with a mass of .75 kg and a radius of 6.5 cm. The coefficient of friction between the 5.8 kg mass and the horizontal surface is .25, and the ropes does not slip on the pulley. They system is released from rest. Use work-energy principles to determine the kinetic energy of the (a) 2.8 kg mass and (b) the pulley after the 5.8 kg mass has moved 2.2 meters.
Answer:
i am answering the same question 3rd time
please find the answer in the images attached.
10. A jogger runs along a road for a distance of 2700 m. If it takes her 900 seconds
to run that distance, what is her speed?
Answer:
Speed = 3 m/s
Explanation:
Given the following data;
Distance = 2700m
Time = 900 s
To find the speed;
Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.
Mathematically, speed is given by the formula;
[tex]Speed = \frac{distance}{time}[/tex]
Substituting into the equation, we have;
[tex]Speed = \frac{2700}{900}[/tex]
Speed = 3 m/s
During sublimation and deposition, this state of matter is skipped:
A) Solid
B) gas
C) liquid
Which is one-dimensional
A.
acceleration
B.
all of them
C.
speed
D.
velocity
Answer:
B
Explanation:
They are all one-dimensional
calculate the magnitude of distance and displacement of a body moving in a complete circle
Answer:
Total distance = 2πr
Total displacement = 0
Explanation:
To Calculate the magnitude of distance and displacement of a body moving in a complete circle, we must come to these facts that:
The distance = circumference of the circle which is equal to the product of 2 ,pi and radius r
That is
Circumference = 2πr
Since velocity is changing and not constant, it is a vector quantity. Likewise displacement is a vector quantity.
The total displacement will be equal to zero.
Therefore, total distance is equal to the circumference of a circle while total displacement is equal to zero.
What are tectonic plate boundaries?
A areas where Earth’s core experiences a high amount of stress
B areas where Earth’s core experiences a low amount of stress
C areas where Earth’s crust experiences a high amount of stress
D areas where Earth’s mantle experiences a high amount of stress
Answer:
c
Explanation:
Answer:
Areas where earth crust experiences a high amount of stress
Explanation:
FCAT review question
is wooden blocks transparent,translucent or opaque
Answer:
opaque
Explanation:
Materials such as wood, stone, and metals are opaque to visible light.
Question 4 of 25
Which statement correctly compares nuclear fission with nuclear fusion?
A. Nuclear fission forms a larger nucleus, and nuclear fusion forms
smaller nuclei.
B. Nuclear fission uses a common isotope, and nuclear fusion uses a
rare isotope.
C. Nuclear fission reactions demonstrate the conservation of atomic
number, and nuclear fusion reactions do not.
D. Both nuclear fission and nuclear fusion produce energy from
matter
Help please
Answer:
Both nuclear fission and nuclear fusion produce energy from
matter
:D
Both nuclear fission and nuclear fusion produce energy from matter is the statement correctly comparing nuclear fission with nuclear fusion.
What is nuclear fusion?The process by which two or more tiny nuclei unite to generate a bigger nucleus is known as a nuclear fusion reaction.
The more energy it takes to liberate an electron from a smaller atom. This is referred to as binding energy.
As a result, when two little nuclei fuse together, there is more binding energy than when two big nuclei fuse together.
For example, the fusion of two hydrogen atoms produces more energy than the fusion of one helium atom, and surplus energy is expelled into space upon binding.
Both nuclear fission and nuclear fusion produce energy from matter is the statement correctly comparing nuclear fission with nuclear fusion.
Hence option D is correct.
To learn more about nuclear fusion refer to the link;
https://brainly.com/question/14019172
A car is traveling south at 70 miles per hour.
A.
acceleration
B.
velocity
C.
speed
D.
centripetal force
Answer:
velocity
Explanation:
velocity includes the direction taken by a person or object
You are adding sugar to a cup of tea. What could you do to make the sugar dissolve
faster? (Select all that apply)
Stir/agitate
Heat the tea
Break the sugar into smaller parts
Keep adding more sugar
Answer:
Stir/agitate and heat the tea
Answer:
Stir the tea, Heat the tea, and Grind the sugar
Explanation:
Heating and stirring both increase the energy of the tea molecules, which increases interactions with the sugar. Grinding sugar allows more sugar molecules to be exposed to the solvent particles that dissolve them.
A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?
The power used when a 100 N force is applied to move an object through a distance of 5 m at constant speed in 10 seconds is 50 W
We'll begin by calculating the energy. This can be obtained as follow:
Force (F) = 100 N
Distance (s) = 5 m
Energy (E) =?E = F × s
E = 100 × 5
E = 500 JFinally, we shall determine the power. This can be obtained as follow:
Energy (E) = 500 J
Time (t) = 10 s
Power (P) =?[tex]P = \frac{E}{t}\\\\P = \frac{500}{10}[/tex]
P = 50 WTherefore, the power used in moving the object is 50 W.
Learn more:
https://brainly.com/question/24817638
What is a mechanical advantage?
Answer:
B
Explanation:
A Mechanical Advantage is when you use a piece of machinery to help you do work, and it is an easy advantage.
How do positive and negative acceleration differ?
Positive acceleration represents an object speeding up; negative acceleration represents an object slowing down.
Positive acceleration moves north or east; negative acceleration moves south or west.
Positive acceleration occurs when there is more velocity than speed; negative acceleration occurs when there is less velocity than speed.
Positive acceleration occurs when an object changes its speed but not its direction; negative acceleration occurs when an object changes both its speed and direction.
Answer:
acceleration
Explanation:
acceleration determines whether you will be adding to or subtracting from the velocity. while negative acceleration means you will subtract from the current value of the velocity and a positive acceleration means you will add
Which of the following forces can change the motion of an object? A. push B. shove C. pull D. all of these
Answer: The answer is D all of these sorry if i am wrong
Explanation:
Explain how energy that comes from the outside of the Earth system drives the flow of water on surface currents.
Answer:
The ocean and atmosphere are connected. They work together to move heat and fresh water across the globe. Wind-driven and ocean-current circulations move warm water toward the poles and colder water toward the equator. ... The majority of the thermal energy at the Earth's surface is stored in the ocean.
Explanation:
The ocean and atmosphere are connected. They work together to move heat and fresh water across the globe. Wind-driven and ocean-current circulations move warm water toward the poles and colder water toward the equator. ... The majority of the thermal energy at the Earth's surface is stored in the ocean.
Why do we need satellites?
(There is no science colum)
Answer:
Because they provide information about clouds, oceans, land and ice.
A 1.50 kg cart moves in a circular path of 1.30 m radius at a constant speed of 2.00 m/s. (a) Calculate the magnitude of the centripetal acceleration of the cart.
(b) Calculate the magnitude of the centripetal force on the cart.
(c) Calculate the coefficient of friction between the tires and the ground
(d) Describe the direction of the centripetal force.
Answer:
the answer is 1500 because of the internet
how can we improve natural resources
Answer:
reduce, reuse, and recycle paper,plastic, electricity, glass, fiber
IF ITS RIGHT YOU WILL GET 5 STARS AND A BRAINLY WITH A LIKE
Answer:
DNA IS SMALLEST
NUCLEUS IS BIGGEST
PLEASE MARK BAiniRINIiEST
Two objects collide. One of the objects deforms upon collision. What type of collision is this?
Select one:
A: Elastic collision, because energy is used to defom the object.
B: Inelastic collision, because energy is conserved.
C: Inelastic collision, because kinetic energy was lost when the object was deformed.
D: Elastic collision, because momentum is conserved.
Answer:
D Elastic collision because momentum is conserved
Explanation:
this is the answer may i be marked brainliest?
What is potential energy?
Answer:
energy that is stagnant and cannot be changed
Answer:
Potential energy is a form of mechanical energy in which an object is at rest or it's not moving
A researcher is trying to identify whether household substances are basic. Which approach would BEST help the researcher
investigate whether substances are basic?
A. Test each substance with red litmus paper.
B. Test each substance with blue litmus paper.
C. Observe each substance and record its color.
D. Mix each substance with a weak base and record the results.
Answer:
a
Explanation:
because red litmus paper turn blues under base or alkaline condition
discuss impact of Newton's second law on roads
Answer:
The second law: When a force is applied to a car, the change in motion is proportional to the force divided by the mass of the car. This law is expressed by the famous equation F = ma, where F is a force, m is the mass of the car, and a is the acceleration, or change in motion, of the car
A hockey puck slides with a constant velocity across a frictionless ice surface. In one paragraph, using your own words, describe the net force on the hockey puck and the observation which allowed you to draw that conclusion.
Answer:
The net force on the hockey puck is zero because it's acceleration is zero due to constant velocity.
The hockey will remain in it's uniform motion unless compelled by an external force.
Explanation:
[tex]from \: vector \: mechanics \\ a = \frac{dv}{dt} \\ but \: at \: constant \: velocity \\ \frac{dv}{dt} = 0 \\ hence : \: \: a = \frac{0}{dt} \\ a = 0[/tex]
Which is an example of the cycling of matter from one sphere to another?
A a puddle of water evaporating and rising into the atmosphere
B animals obtaining energy from plants
C heat energy from the sun warming the land
D heat energy from the sun warming the oceans
a measuring cylinder contains water when put rock level rises what is volume of rock
Answer:
The volume displacement resulting from the action, minus the original volume.
In regions of the cardiovascular system where there is steady laminar blood flow, the shear stress on cells lining the walls of the blood vessels is about 20 N / M2. If the shear strain is about 0.008, estimate the shear modulus for the affected cells.
Answer:
Shear Modulus = 2500 Pa = 2.5 KPa
Explanation:
The shear modulus is defined as the ratio between the shear stress and the shear strain. Hence, the shear modulus, in this case, can be calculated by the use of the following formula:
[tex]Shear\ Modulus = \frac{Shear\ Stress}{Shear\ Strain}\\[/tex]
we have,
shear stress = 20 N/m²
shear strain = 0.008
Therefore,
[tex]Shear\ Modulus = \frac{20\ N/m^2}{0.008}\\\\[/tex]
Shear Modulus = 2500 Pa = 2.5 KPa
If the current in a wire which is placed perpendicular to a magnetic field increases the force on the wire
Answer:
The force on the wire increases
Explanation:
Since the force on the wire F = BILsinФ where B = magnetic field strength, I = current in wire, L= length of wire and Ф = angle between the magnetic field and the wire.
Given that the magnetic field and the wire are perpendicular, Ф = 90°
So, F = BILsin90° = BIL
Since B and L are constant, F ∝ I
So, if the current in the wire increases, the force on the wire also increases.
HELPPPP PLSSS I NEED HELP
Answer:
D. Pearl Harbor
Explanation: