Answer: find the answer in the explanation.
Explanation:
Before the truck driver sees a dog running into the road, The mechanical energy state of the truck will be kinetic energy at maximum.
Immediately he applied the brakes, the mechanical energy of the truck will be combination of kinetic energy and potential energy.
The kinetic energy will gradually decrease as potential energy continue to increase till it reaches maximum potential energy.
The truck will come to a stop at maximum potential energy
Which of these statements describes a constraint imposed on scientific
researchers by the Antarctic Treaty System?
A. The safety of scientists is ensured.
B. Facilities are inspected for compliance.
c. Some areas are protected from human activity.
D. Scientific knowledge is not shared.
Answer:
The answer is C.
Explain the concept of "charge" and how it relates to electricity?
Answer:
An Electric "charge" is a property of matter that causes a force to repel or attract when placed into a magnetic field. These charges can be replicated into positive and negative electrons when made from a chemical reaction.
Answer:
an electri
Explanation:
What is torque in physics ?
Answer:
Torque is a measure of the force that can cause an object to rotate about an axis.
Answer:
Torque is a measure of how a force acting on an object causes that object to rotate.
A body oscillates with 25hz what is its time period
Answer:
4 seconds
Explanation:
The frequency of a body is the number of oscillations in one second. It is the number of cycles per unit time. The S.I unit of frequency is the Hertz (Hz).
The period of a body is the time taken to complete one oscillation. The period is inversely proportional to the frequency of the body. It is the reciprocal of frequency and the S.I unit is second (s).
A body oscillates with 25hz. Therefore the frequency (f) = 25 Hz.
The period (T) is given as:
[tex]Period (T)=\frac{1}{frequency(f)} \\T=\frac{1}{f} =\frac{1}{0.25}=4\\T=4\ seconds[/tex]
A 17-tooth spur pinion has a diametral pitch of 8 teeth/in, runs at 1016 rev/min, and drives a gear at a speed of 508 rev/min. Find the number of teeth on the gear and the theoretical center-to-center distance.
9. [03.03]
When comparing two circuits, you note that circuit one has twice the voltage and half the resistance of circuit two.
Answer:
Circuit one will have more current than circuit two
Explanation:
I am assuming that you have to see which circuit has the greater current in this case. Well, this is the perfect example of Ohm's Law, which states the following -
V = IR,
where V = voltage / potential difference, I = current, and R = resistance
If one circuit has twice the voltage and half the resistance of the second circuit, as voltage is directly proportional to the resistance -
2V = I( 1 / 2R ),
4V = IR,
I = 4V / R
Whereas in the second circuit -
V = IR,
I = V / R
As you can note, voltage is directly proportional to the current ( I ) as well as the resistance. The only difference between the two formulas I = 4V / R, and I = V / R is the difference in the voltage. With the voltage being 4 times greater in the first circuit, and current is 4 times greater in the first circuit as well.
Hence, circuit one will have more current than circuit two
That's a very interesting observation. When you notice that, does it stimulate any questions in your mind due to your natural curiosity ?
For example, do you walk away wondering, perhaps, how the current in the two circuits might compare ? If so, you've come to the right place. Read on:
Take the form of Ohm's Law for current . . . I = V / R . . . and apply it to both circuits:
For the second circuit: I₂ = V / R
For the first circuit:
I₁ = (2V) / (R/2)
Multiply numerator and denominator by 2 :
I₁ = (4V) / R
I₁ = 4 (V / R)
I₁ = 4 I₂
Provide an example of a model that would show the relationship between 2 objects interacting with an electric field.
Answer:
See attached file for model
Explanation:
A ball moving at a velocity of 10 meters/second has a momentum of 8.0 kilogram meters/second. What is its mass?
Answer:
0.8 kilogram
Explanation:
Mass:This can be defined as the quantity of matter a body contained. The S.I unit of mass if kg.
From the question,
M = mv................. Equation 1
Where M = momentum, m = mass. V = velocity
make m the subject of the equation
m = M/v.............. Equation 2
Given: M = 8.0 kilogram meters/second, v = 10 meters/second
Substitute these values into equation 2
m = 8.0/10
m = 0.8 kilogram
A train moving at a constant speed on a surface inclined upward at 10.0° with the horizontal travels a distance of 400 meters in 5 seconds. Calculate the vertical velocity component of the train during this time period. A. 41.10 meters/second B. 19.23 meters/second C. 13.89 meters/second D. 41.70 meters/second E. 78.78 meters/second
Answer:
C. 13.89 meters/second
Explanation:
If the velocity of the train is v=s/t, where s is the distance and t is time, then v=400/5=80m/s. To get the vertical component of the velocity we need to multiply the velocity v with a sin(α): Vv=v*sin(α), where Vv is the vertical component of the velocity and α is the angle with the horizontal. So:
Vv=80*sin(10)=80*0.1736=13.888 m/s.
So the vertical component of the velocity of the train is Vv=13.888 m/s.
Answer:
C.
13.89 meters/second
Explanation:
HELP NEEDE ASAP!!!!!!!! How do you understand by the longitudinal wave? Describe the longitudinal nature of sound waves
Answer:
Sound as a Longitudinal Wave
For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport.
Answer:
Hey!
Here is your answer!
Explanation:
LONGITUDINAL WAVES:
These are waves where the transferral of energy is PARALLEL to the direction it travels in...For Example...Sound Waves are Longitudinal as they move in a series of COMPRESSIONS and RAREFACTIONS (typical of all Longitudinal Waves)...
The compressions are known in diagrams to be an area of a dense collection of PARTICLES where the energy (or sound in this case) is being transferred in the same direction as the movement...
The rarefactions are shown as almost empty area of particles where the medium (the matter of which the wave travels in) is moving...
Hope this helps!
*here's a diagram*
A 900 kg car is traveling at 20 m/s along the road. What force must be applied to the car to stop it in a distance of 30 m2 Assume a
constant change in velocity.
A. 6000 N
B. 12,000 N
C. 7000 N
D. 18,000 N
h
Answer:
A. 6000 N
Explanation:
Set Up: Let the origin be at the location of the car when the force is applied & the +x direction be in the direction the car is traveling.
List the known & unknown quantities:
mass of the car m = 900 kg
υx = 0 since the force stops the car
υ0x = 20 m/s
x – x0 = 30 m
Fx = force = ?
Solve: First find the acceleration of the car, ax:
υx2 = υ0x2 + 2ax(x – x0)
ax= υx2⎯ υ0x2/2(x⎯x0) = (0 m/s)2⎯(20 m/s)2/2(30 m) =⎯6.67 m/s2
Now find the force using Newton’s second law.
∑Fx=max=(900 kg) (⎯6.67 m/s2)=⎯6000 N
A car of weight 900 kg which is travelling at speed of 20 m/s on a road then the force applied to stop the car will be 6000 N in opposite direction of moving car.
What is Force?A force is an impact that has the power to alter an object's motion. A motion of an object with weight to accelerate when it changes its velocity, for, as when it moves away from rest. An obvious way to describe force is as a pushing or a pull. A force is a vector quantity, since it has both size and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F.
The net force acting on an object being equal to the speed at which it's momentum varies over time, according to Newton's second law in its original formulation.
According to the data given in the question,
υ(x)2 = υ0(x)2 + 2a(x) × (x – x₀)
a(x)= υ(x)2- υ0(x)2/2 (x⎯x₀) .
= (0 m/s) 2- (20 m/s)2/2(30 m)
= -6.67 m/s2
By newton's second law, let's find the force,
∑F (x)=max
=(900 kg) (⎯6.67 m/s2)
= -6000 N
Therefore, the force must apply to stop the car is 6000 N in the opposite direction.
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taking a rest one or two days in between training sessions helps your body blank much faster
Answer:
Recover
Explanation:
Got it right on the quiz
The kicker now kicks the ball with the same speed as in the number of 4,but at 60.0°from the horizontal or 30.0° from the vertical. a.What is the time the ball is in the air? b.What is the distance the balls travel before it hits the ground? c.What is the maximum height?
Answer:
Explanation:
1) The time of flight equation for projectile motion can be used here to find total time in air.
t = 2vsin∅ / g
where v is speed, Ф is launch angle
t = 2×4×sin 60 / 9.8
t = 0.71 seconds
2) Distance where it hit the ground is called as range and has the following standard equation
D = v² sin2Ф/g
D = 4²sin 2×60 / 9.8
D = 1.41m
3) Maximum elevation is maximum time reached
h = v² sin²Ф / 2g
h = 4²sin² 60 / 2*9.8
h = 0.61 m
La física moderna se encarga del estudio de: a) Las interacciones que conducen a un cambio de movimiento b) Los fenómenos luminosos considerando a la luz como un movimiento ondulatorio electromagnético c) Las interacciones debidas a cargas eléctricas d) Los comportamientos de las partículas que forman la materia y las fuerzas que las rigen
Answer:
corrct are a and d
Explanation:
La denominada Física moderna se desarrollo a principios del siglo XX, en respuesta a la imposibilidad de la física clásica de Newton de explicar una serie de fenómenos.
En es física moderna se desarrollo un modelos para explicar el movimiento de los cuerpo que toma como base que la velocidad máxima de un cuerpo es la velocidad de la luz en el vació, esta parte es denominada relatividad especial.
En consecuencia la afirmación correcta es a
En un segunda partee la fiscal moderna se desarrollo un explicablemente intercalación de las partículas que forman la materia ( átomos) y la fuerzas (potenciales ) con que interactúan, esta segunda parte se denomina Mecánica cuántica.
Por lo cual la otra respuesta correcta es la d
Traslate
The so-called modern physics was developed at the beginning of the 20th century, in response to the impossibility of Newton's classical physics to explain a series of phenomena.
In modern physics, a model was developed to explain the movement of the body based on the fact that the maximum speed of a body is the speed of light in vacuum, this part is called special relativity.
Consequently the correct statement is to
In a second part of the modern prosecutor, an explanatory intercalation of the particles that make up matter (atoms) and the (potential) forces with which they interact is developed, this second part is called Quantum Mechanics.
So the other correct answer is d
give two disadvantage of hydroelectric power
Explanation:
damming of water which changes water flow, in turn could/does cause road/ property flooding
directly being related to water usage, if we have droughts(lack of rain) there we have less water to use for the power.
Environmental consequences
Limited Reservoirs
what is called gratational force
Answer:
Gravitational force can be seen as the pull that the earth has on an piece of matter. Everything on earth has a force acting on it which is gravity. It tries to pull two object closer to each other but never apart. The numerical value for gravitational force is 9.8 m/s^2 for free falling objects
I NEED HELP PLEASE, THANKS! :)
The electric field around a positive charge is shown in the diagram. Describe the nature of these lines.
Answer:
They move outwards.
They don't intersect each other at any point.
They show the electric field.
Explanation:
Answer:
Please read the answer below
Explanation:
the nature of these lines refers to the fact that positive charges generate field lines that are directed out of the positive charges, and in turn are directed towards some negative charge present somewhere in the universe.
By consensus, the electric field lines leave the positive charges and enter the negative charges. That is the reason why in a scheme like the shown in the image, is considered implicitly the existence of a negative charge, in some place of the universe.
if the input force on a wheel and axle is 2 N and the output force is 20N what is its mechanical advantage
Mechanical Advantage is always (Output Force) / (Input Force) .
MA = (20 N) / (2 N)
MA = 10
Generate a description of the right-hand rule for finding the magnetic field around a current carrying wire and tell how it is used to determine the direction of a magnetic field around a straight, current carrying wire.
Answer:
Right Hand Rule:
The direction of the magnetic field is governed by the direction of the current flowing through the conductor. Right Hand Grip Rule is a simple method of finding the direction of current flowing through the Conductor.
Method:
Grasp a wire with your right hand in such a way that your thumb is pointed in the direction of current. Then curling fingers of your hand will point in the direction of magnetic field.
The cartoon of the roadrunner and the coyote usually has rockets going at around 8 kilometers per minute. How much is this in miles per hour? (1m = .00062 miles)If we have a terrain with a square house in the middle, the walls of the square house are 50.0 yards long and has 10 yards high ceilings. What is the volume of the interior of the house in cubic meters and cubic centimeters? (1 yard = 3 feet, 1 meter = 3.28 foot)The acceleration of an object is given by 314,000 Hectometers per hour squared. Convert the units to Meter per second square and miles per second square.
Answer:
1 feet
Explanation:
1 feet = 1 feet so its one feet
What is matter made of ? Will mark as brainliest to answer
Answer:
Explanation:
All matter is made up of atoms, which are turned up of protons, neutrons and electrons.
They bond together to make up matter
Answer:
Atoms
Explanation:
All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons. Atomess come togetheer to forms molecules, which are the building blocks for all types of matter
a boy runs from his house to school at speed 5m/s on a straight road and returns with speed of 10m/s.The distance between the house and school is 100m. Find his average velocity.... with explaination please
Explanation:
time spent to run from house to school=100/5=20s
time spent to return from school=100/10=10s
average velocity=200m/(10+20)
=6.66m/sShow that a light ray that strikes two mutually perpendicular reflecting surfaces is reflected back exactly parallel to the direction from which it came.
Take a look at the attachment below. As you can see, the figure demonstrates a 90 degree angle such that the surfaces are perpendicular, and hence are independent of the angle of incidence. You could say that this forms a part of a parallelogram -
Using the letters for the seven colours and starting with R (Red), what is the correct order for the colours in a rainbow? Your answer should be in the form RXXXXXX Which of these seven colours has the shortest wavelength?
Answer:
Red
Orange
Yellow
Green
Blue
Indigo
Violet
shortest wavelength: violet (380 nanometers)
¯\(°_o)/¯
Answer:
Red Orange Yellow Green Blue Indigo Violet
violet has the shortest wavelength
happy to help :)
In which direction of the wave motion do longitudinal waves transfer energy?
A-perpendicular
B- parallel
C- close
D-equal
Answer:
B, Parallel.
Explanation:
Mark as brainliest pls!
The wave motion does longitudinal waves transfer energy in the direction Parallel to the wave motion. Hence, option B is correct.
What is a Wave?Waves are disturbances that move regularly and orderly from one location to another. Although sound, lighting, and the movement of elementary particles all have wave-like characteristics, surface waves that move on water are the most well-known.
The disturbance periodically oscillates with a set frequency and wavelength in the simplest waves (see periodic motion). In contrast to electromagnetic waves, which do not require a medium to travel and may move through a vacuum, mechanical waves, like sound, need a medium to go through. A medium's characteristics determine how a wave will travel across it. Seismic wave is also seen.
Therefore, option B is correct.
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which type of bond is found between the atoms of a molecule?
Answer:
Covalent Bond is found between the atoms of a molecule.
An airplane starts at rest and accelerates down the runway for 25 s. At the end of the runway, its final velocity is 75 m/s east. What is its acceleration?
Answer
3m/s²
Explanation
u=o
t=25s
v=75m/s
from Newton's first law of motion,
v=u+at
75=0+a(25)
75=25a
a= 75/25
a=3m/s²
The acceleration of the airplane is 3m/s².
What is acceleration?Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).
Given parameters:
Initial velocity of the airplane: u=o.
Time taken: t=25s.
Final velocity of the airplane: v=75m/s.
We have to find acceleration of the plane: a = ?
We know that for accelerating motion of the air plane; final velocity can be expressed as:
v=u+at
⇒ 75=0+a(25)
⇒ 75=25a
⇒ a= 75/25
⇒ a= 3m/s².
hence, acceleration of the airplane is 3m/s².
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If I travel 100 m N in 5 seconds, what is my average velocity?
Answer:
Explanation:
[tex]Average- velocity = \frac{displacement }{time} \\A.V = \frac{100}{5} \\A.V = 20[/tex]
Modifiable strength improvement factors include all of the following except...??
Answer:
Muscle size and training specifiicty
Explanation:
It depends on all other factors such as anatomy and psychology, muscle fiber recruitment, motor pattern development and muscle memory but to increase modifiable strength, size plays no big role.
Why does time slow down the closer you get to a black hole, I know that time slows down the faster you move through space and the closer you get to the speed of light, but how does being near a black hole slow time down even futher?
Answer:
Near the black hole, The gravitational pull is so strong and the black hole has a lot of stress energy. This causes the clock to tick slower than usual and due to this , Time slows down to a great extent.