Answer/Explanation:
A timeline of atomic models
Atomic model (1808)Plum-pudding model (1904)Nuclear model (1911)Planetary model (1913)Quantum mechanical model (1926-present)A horse pulls a wagon that weighs 10 times more than the horse. The horse pulls with a force of 500N to move the wagon forward. How much force does the wagon exert on the horse? *
a. More than 500N
b. It depends on the size of the horse
c. Less than 500N
d. 0N because a wagon cannot exert a force
e. 0N because the wagon is moving
f. 500N
Answer:
f. 500N
Explanation:
The force exerted by the wagon on the horse is 500N directed in the opposite path .
This is premised on the Newton's third law of motion which states that "action and reaction forces are equal and opposite in direction".
So, as the action force of 500N is used by the horse to drag the wagon, the wagon also exerts an oppositely directed force of 500N on the horse.
This way, the acceleration can continue.
How many half lives will it take for 300 grams of Carbon-14 to decay to 18.75 grams?
Answer:
16
Explanation:
300/18.75
How does energy move in relation to the medium in a longitudinal wave?
Answer:
In a transverse wave.ok now u know
if the police are chasing a runaway car why is knowing the velocity of the car important
If you only know its speed, that's not enough information to catch it. You could even chase it at DOUBLE that speed, and you'd never catch it if you were chasing in the wrong direction.
You also have to know the DIRECTION the runaway car is going, so that you can chase in the same direction.
Now that you know its speed AND direction, you know its velocity. You need that information to have any chance of catching it.
Conservation of energy says the kinetic energy and the potential energy for each trial should be equal. true or false answer fast
Answer:
true
Explanation:
this is because potienal energy is energy that is stored, and kinetic is energy being used, as kinetic is used, potential is also being used.
What does psychophysics study?
unusual discoveries in laboratory experimentations
the laws of physics and how believable they are
people's reactions and perceptions to stimuli
Answer:
people's reactions and perceptions to stimuli.
Explanation:
Psychophysics can be defined as the scientific study of people's reactions and perceptions to stimuli.
Stimulus can be defined as an obvious change in either the chemical or physical structure of an organism' environment (either external or internal). Thus, all living organisms (humans) respond to changes in their environment and consequently, an appropriate response or reaction is made. Also, stimulus arising from within the organism is known as internal stimulus while those from its environment are known as the external stimulus.
In organisms, the specialized cells that detect stimulus are generally known as sensory receptors while a group of these receptors is referred to as sense organ.
Hence, psychophysics is a branch of psychology and it is typically focused on determining the effects of stimuli on the mental health or processes of humans.
Answer:
study of people's reactions and perceptions to a stimulus.
Explanation:
Before the emergence of psychology, psychophysics was the more common practice. Psychophysics is the study of people's reactions and perceptions to a stimulus. For example, when you hear a bell ring, do you act startled, blink your eyes, turn your head, or do nothing? Psychophysicists were interested in people's five senses and how those senses responded to stimulation from elsewhere. Tests were administered to people to try to understand mental phenomena.Psychophysicists wanted to know what people's reactions would be. For example, if a bell rang twenty times, how well did a person hear that sound and did the person find that sound pleasant?
17. A ball falling from a building has a kinetic energy of 2000 J and potential
energy of 2376 J. What is the mechanical energy of the ball?
Imc
Answer:
C. 4736J
Explanation:
The mechanical energy of ball is the sum of its kinetic energy and potential energy at any point;
Mechanical energy = kinetic energy + potential energy
Given:
kinetic energy = 2000J
potential energy = 2376J
So;
Mechanical energy = 2000J + 2376J = 4736J
The speed of light is 3 x 10^8 m/s. If its frequency is 4.11 x 10^4 Hz, what is its wavelength?
Answer:
21'8
Explanation:
What is the speed of a baseball that travels 49 meters in 2.8 seconds?
(I will mark first answer Brainliest!)
Answer:
49 meter per second is the speed of the baseball
Explanation:
thank me later
Which are characteristics of electromagnetic waves? Check all that apply.
They travel only through matter.
Waves with a higher frequency have a shorter wavelength.
Waves with a higher frequency have a longer wavelength.
They all move at the same speed.
They can travel through space.
Answer:
2,4,5
Explanation:
Answer:
2,4,5
Explanation:
I got it right on edge 2021
2) A bully is pushing a boy against a locker as shown with a force of
500N. The angle between his arms and the ground is 40°. Draw a free-body diagram of
the boy and then find the normal force between the boy and the wall.
HELP
Answer:
pull out the 9
Explanation:
What would happen to the tides of the moon was twice as massive it is currently?
Answer:
the tides would be twice as big as they are now and the world would flood
Explanation:
The tides would be twice as massive as currently if moon was twice as massive it is currently.
What is tidal force?The tidal force is a gravitational effect that stretches a body along a line towards the center of mass of another body due to a gradient in the gravitational field from the other body.
A body stretches as a result of this disparity. As a result, in addition to being a byproduct of the gravitational field, the tidal force is also referred to as the differential force.
The nearest side is pulled more strongly than the farthest side because the gravitational field imposed on one body by another is not consistent across its portions.
As tidal force is a kind of gravitational force, it linearly depends on the mass of the moon. So, the tides would be twice as massive as currently if moon was twice as massive it is currently.
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what consist of a body wave
if the mass of the object is tripled and the speed is doubled then the kinetic energy will change by a factor of
Answer:
New kinetic energy = 12 times of the initial kinetic energy.
Explanation:
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
Where
m is mass of the object
v is speed of the object
ATQ,
If the mass of the object is tripled, m' = 3m
Speed is doubled, v' = 2v
New kinetic energy will be:
[tex]K'=\dfrac{1}{2}m'v'^2\\\\K'=\dfrac{1}{2}\times 3m\times (2v)^2\\\\=\dfrac{1}{2}\times 3m\times 4v^2\\\\=12\times \dfrac{1}{2}mv^2\\\\K'=12\times K[/tex]
So, the new kinetic energy will become 12 times of the initial kinetic energy.
PLEASE HELP 100 POINTS
If the simple machine reduces the amount of force, what must be increased? (Think of using an inclined plane)
the size of the simple machine
the speed of the input force
the work the simple machine performs
the distance over which the force is applied
If the simple machine reduces the amount of force, what must be increased the size of the simple machine.
What is force?A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
An object that transfers and alters force is a machine. Machines come in a variety of forms, such as incline planes, levers, wheel and axles, pulleys, and gears. • The mechanical advantage provided by a machine is the same as the output force. divided by the input force (load)
If the simple machine reduces the amount of force, what must be increased the size of the simple machine.
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Which of the following is an example of potential energy?
o The energy a baseball has because of its motion,
The energy a spring has by being compressed
The energy an object gains by increasing its temperature,
The energy of an electromagnetic.
Answer:
The energy a spring has by being compressed.
Explanation:
Potential energy is stored energy, whereas kinetic energy is the energy of moving things.
What are some ways to deal with stress? HELP
Answer:
dear the other side is the hardich the value that indicates that the other hand if one of triangle ABC news and information or have any further information on the value of x the ki friend my dear the ki aadami you are girl or by phone
Answer:
play games
do meditation
take a long breath
be calm and relax
share your stress
get help from elders
the waves that heat a cup of water in the microwwave are an example of electromagnetic waves. True or False
Classify the following situations into contact and non-contact forces.
(a) Applying brakes in a vehicle
(b) a coconut falling from a coconut tree
(c ) the planets revolving around the sun
(d) a ball is rolling on ground.
Answer: Contact force
a. Applying break in a vehicle.
d. The speed of ball rolling on ground is reduced
Non contact force
b. A coconut falling from a coconut tree.
c. The planets revolving around the sun.
Explanation:
The contact force is the force which exerts when one object or entity comes in contact with other object or entity. For example, on application of break the vehicle stops, the force is applied on the breaks to stop the vehicle. The ball rolling on the ground the speed reduces so the application of force on the ground also reduces.
The non contact force is the force one object exerts on the other without coming in direct contact with the other object. The force exerted by one object on other due to gravity is a non contact force. The coconut falling on the ground and planets revolving around the sun are examples of non contact force due to gravity.
In modified PE football, the quarterback can only run with the ball if
A The quarterback has no open receivers
B Time runs out
C Another player on the offense touches the ball before the play starts
D it is 4th down
Answer:
its c i just did the test
Explanation:
A 50.0 kg driver is riding at 35.0 m/s in her red sports car when she must suddenly slam on the brakes to avoid
hitting a deer crossing the road. She strikes the air bag, which brings her body to a stop in 0.500 s.
What average force does the seat belt exert on her?
Answer:
3500N
Explanation:
Given parameters:
Mass of driver = 50kg
Speed = 35m/s
Time = 0.5s
Unknown:
Average force the seat belt exerts on her = ?
Solution:
The average force the seat belt exerts on her can be deduced from Newton's second law of motion.
F = mass x acceleration
So;
F = mass x [tex]\frac{change in velocity }{time}[/tex]
F = 50 x [tex]\frac{35}{0.5}[/tex] = 3500N
At time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis. As the puck slides, a constant acceleration acts on it that has the following components: a = - 2 0.360 m/s and da, = -0.980 m/s. What is the velocity of the puck at time t = 1.50 s? 2 0
The velocity of the punk at time t = 1.5 s is equal to 2.47 m/s.
What are the components of velocity?The object will have two velocities during the projectile motion, one is horizontal velocity and the other is vertical velocity. The horizontal velocity of the object is constant throughout the projectile motion but the vertical velocity is changed in the projectile motion.
Given that the velocity vector is making an angle θ with a horizontal table, θ = 35°
The vertical component of the velocity of the puck can be determined as:[tex]u_x = u Sin 35^o = 3.60 \times 0.573 =2.06 m/s[/tex]
The horizontal component of the velocity of the puck can be determined as:
[tex]u_y = u cos 35^o = 3.60 \times 0.82=2.95 m/s[/tex]
Given the acceleration aₓ = -0.360 m/s² and a y = -0.980 m/s²
The final vertical components of the velocity of the punk are:
[tex]v_x = u_x + a_xt[/tex]
[tex]v_x = 2.95 - (0.360) (1.5)\\v_x = 2.41 m/s[/tex]
and, the horizontal velocity of the punk is:
[tex]v_y = u_y +a_yt\\v_y = 2.06 - (0.980) (1.5)\\v_y = 0.59 m/s[/tex]
The velocity of the punk can be determined as:
[tex]v = \sqrt{v_x^2 + v_y ^2}\\ v =\sqrt{(5.80)^2 + (0.35)^2}\\ v = 2.47 m/s[/tex]
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3. Canopus is 313 light years from Earth. How old is the light that we are currently seeing?
Answer:
lícita; de navegar y comerciar; de peticionar a las autoridades; de entrar, permanecer, transitar y salir del territorio argentino; de publicar sus ideas por la prensa sin censura
The equation most often associated with Newton's Second Law of Motion is
Answer here
Answer: F=ma
Explanation:
If you cut a apple and leave it in the open air and it turns brown what kind of chemical change is that
Answer:
Oxidation
Explanation:
The browning of the apple after you cut it undergoes a natural chemical change called oxidation, wherein the apple's enzymes react with the oxygen in the environment.
Help plz I’ll mark brainliest
Answer:
concave
Explanation:
the middle of the concave lens is narrow and the edges are flattened.
What centripetal force is needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s
Answer:
We conclude that the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s is 393.75 N.
Explanation:
Given
Mass m = 7 kgRadius r = 4 mVelocity v = 15m/sTo determine
We need to determine the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s.
We know a centripetal force acts on a body to keep it moving along a curved path.
We can determine the centripetal force using the formula
[tex]F_c=\frac{mv^2}{r}[/tex]
where
[tex]m[/tex] is the mass[tex]v[/tex] is the velocity[tex]r[/tex] is the radius[tex]F_c[/tex] is the centripetal forcesubstitute m = 7, r = 4, and v = 15 in the formula
[tex]F_c=\frac{mv^2}{r}[/tex]
[tex]F_c=\frac{7\left(15\right)^2}{4}[/tex]
[tex]F_c=\frac{1575}{4}[/tex]
[tex]F_c=393.75[/tex] N
Therefore, we conclude that the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s is 393.75 N.
the total linear momentum of a truck of mass 6000 kg that is moving at a speed of 40 m/s and a car of mass 1000 kg that is moving at a speed of 10 m/s is __ kg • m/s
Answer:250,000
Explanation:
The phrase 10 m per second squared describes the what
Answer:
acceleration that is caused by gravity
Explanation:
Look at the graph. How many minutes is the sample COMPLETELY a liquid?
Answer:
2 minutes
Explanation:
From the graph, it takes 2 minutes for the piece of ice to go to the completely liquid phase.