Answer:
like fixing are car engine would be an example of a mechanical wave
examples of rectilinear motion
Answer:
Examples for Rectilinear Motion
1) The use of elevators in public places is an example of rectilinear motion.
2) Gravitational forces acting on objects resulting in free fall is an example of rectilinear motion.
3) Kids sliding down from a slide is a rectilinear motion.
4) The motion of planes in the sky is a rectilinear motion.
a plane took 3 hours and 33 minutes to finish a journey. if the distance of the journey was 2840 miles at what average speed did the plane travel
Answer:
The average speed was 800 miles/hour
Explanation:
Average Speed
If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the distance over the time:
[tex]\displaystyle V=\frac{d}{t}[/tex]
A plane took 3 hours and 33 minutes to travel d=2840 miles to finish its journey. We will calculate the average speed in miles per hour, thus the time needs to be expressed in hours, and it's given in a mixed unit:
t=3 hours+33 minutes
Since there are 60 minutes in an hour:
t=3 hours+33 /60 hours = 3 hours + 0.55 hours = 3.55 hours
Now calculate the average speed:
[tex]\displaystyle V=\frac{2840}{3.55}=800[/tex]
The average speed was 800 miles/hour
what is the magnitude of the average velocity of the hummingbird between 2 sec and t 4 sec
The MAIN function of political parties in the United States is to
Recruiting and nominating candidates.
Your boat departs from the bank of a river that has a swift current parallel to its banks. If you want to cross this river in the shortest amount of time, you should direct your boat If you want to cross this river in the shortest amount of time, you should direct your boat:_________
a. perpendicular to the current.
b. upstream.
c. downstream.
d. so that it drifts with the current.
Answer:
D.
Explanation:
Given that your boat departs from the bank of a river that has a swift current parallel to its banks. If you want to cross this river in the shortest amount of time, you should direct your boat: so that it drifts with the current.
If the boat moves perpendicular to the current, the current flow will be the resistance to the movement of the boat. So, it's better for the boat to drifts perpendicularly with the current.
The best answer is therefore option D.
Which of the following is the best prediction of what would happen if the distance across section 1 in the diagram were to decrease?
1. Frequency would increase
2. Energy would decrease
3. Wavelength would increase
4. Amplitude would decrease
Answer:
Option (1)
Explanation:
Relation between wavelength and frequency of a wave is,
Wavelength (λ) ∝ [tex]\frac{1}{\text{Frequency}}[/tex]
That means wavelength is inversely proportional to the frequency of a wave.
When the wavelength of the wave is decreased, frequency of the wave will increase.
Therefore, if the distance across section 1 is decreased in the given picture,
wavelength gets decreased.
As a result frequency of the wave will increase.
Option (1) will be the answer.
A 100 kg man stands on bathroom scale inside an elevator, on planet where free fall acceleration is 10 m.s^2. Elevator moves down with constant speed 5 m/s up. Reading of the scale is?
A.1500 N
B.1000 N
C.500 N
D.0 N
Answer: i think its A. Let me knows if its wrong so i can double check
Explanation:
The reading on the scale, if the 100 kg man standing inside the elevator, which is moving with a velocity of 5 m/s is 1000 Newtons, so option B is correct.
What is acceleration?Acceleration describes the speed and direction changes in velocity over time. Acceleration refers to the change in speed or direction of an item or points traveling straight forward. Even though the speed is constant, motion on a circle increases because of the constant change in direction.
Both effects add to the acceleration for all other types of motion. Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is a vector.
Given:
The mass of man, m = 100 kg,
The speed of the elevator, s = 5 m/s,
The reading is higher when the person is in a standing elevator (or one moving at a steady speed).
w = mg =100*10 = 1000 N
Now:
If the elevator is going down at 5 m/s and the weight will be
W = m(g -a)
W = 100 (10 -0)
Here the acceleration of lift is zero as it is moving with constant speed,
W = 1000 N
Therefore, the reading on the scale, if the 100 kg man standing inside the elevator which is moving with a velocity of 5 m/s is 1000 Newtons.
To know more about Acceleration:
https://brainly.com/question/3046924
#SPJ2
Measure What are the
most common units for
expressing the volume of
liquids?
Calculate Suppose an
object weighs 15 g and has
a volume of 5 cm. What is
the density of the object?
Question 2
If a rocket travels 9,684 km in 2.4 hours, what is its speed in km/hr?
Answer:
4,035 km/hr.Explanation:
velocity = distance / time
where distance = 9684 km
time = 2.4 hours
plugin values into the formula:
distance = 9,684 km
2.4 hours
= 4,035 km/hr.
Answer:
4,035/kmph
Explanation:
I just found the unit rate by dividing 9684 by 2.4
CHANGING STATES OF MATTER
As substances gain or lose energy their state, or phase, of matter changes,
STATE OF MATTER
Sublimation
Deposition
Condensation
Answer:
condensation and deposition
Explanation:
when something gets cooler it's molecules lose kinetic energy and that applies only in condensation and depostion
A block of mass m = 4.80 kg is suspended as shown in the diagram below. Assume the pulley to be frictionless and the mass of the strings to be negligible. If the system is in equilibrium, what will be the reading of the spring scale in newtons?
Answer:
W = 47.04 N
Explanation:
It is given that,
A block of mass 4.8 kg is suspended by the pulley and it is assumed that it is frictionless and the mass of the strings to be negligible.
We need to find the reading of the spring scale if the system is in equilibrium.
At this position, the scale reading is equal to the weight of the block such that,
W = mg, where g is the acceleration due to gravity
W = 4.8 kg × 9.8 m/s²
W = 47.04 N
So, the reading of the spring scale is 47.04 N.
why do crumple zones reduce the force in a collision.
New evidence does not change what scientists already believe to be true. Group of answer choices True False
How are temperature and average kinetic energy related? Explain.
Answer: When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles.
Explanation: Increase in temperature means an increase in Kinetic energy.
is a penny a conductor or insulator
It's a conductor aaaaaaaaaaaaaaaaaaaaaaa
Answer:
Conductor because pennies are made of copper, which is a conductor. Hope this helps and good luck on your assignment.
Describe Eddington's experiment to prove Einstein's theory.
Answer:
i
Explanation:
Gravity causes objects to be attracted to one another. This attraction keeps our feet firmly planted on the ground and causes the moon to orbit the earth. The force of gravitational attraction is represented by the equation
F=Gm1m2r2
where F is the magnitude of the gravitational attraction on either body, m1 and m2 are the masses of the bodies, rrr is the distance between them, and GGG is the gravitational constant. In SI units, the units of force are kg⋅m/s^2, the units of mass are kg, and the units of distance are m. For this equation to have consistent units, the units of G must be which of the following?
a. kg3m⋅s^2
b. kg⋅s2m^3
c. m3kg⋅s^2
d. mkg⋅s^2
Answer:
C. the units of G is m³/kg.s²
Explanation:
Given;
magnitude of gravitational force, [tex]F = \frac{Gm_1m_2}{r^2}[/tex]
From the equation above, gravitational constant G is given as;
[tex]F = \frac{Gm_1m_2}{r^2} \\\\G = \frac{Fr^2}{m_1m_2}\\\\G = (F)(\frac{1}{m_1m_2})(r^2) \\\\G = (\frac{kg.m}{s^2})(\frac{1}{kg^2} )(m^2)\\\\G = \frac{m^3}{kg.s^2}[/tex]
Thus, the correct option is "C" G = m³/kg.s²
An unhealthy diet is to cardiovascular disease as______
is to cancer.
1. obesity
2. smoking
3. poor hygiene
Answer:
2- smoking
because smoking caused lung cancer.
Answer:
Obesity
Explanation:
Obesity the condition of being grossly fat or overweight mostly causes cardiovascular diseases such as coronary heart disease (CHD)
A car of mass M
= 1200 kg
traveling at 65.0 km/hour
enters a banked turn covered with ice. The road is banked at an angle θ
, and there is no friction between the road and the car's tires as shown in image. Use g
= 9.80 m/s2
throughout this problem.
What is the radius r
of the turn if θ
= 20.0 ∘
(assuming the car continues in uniform circular motion around the turn)?
A car with a mass of 1200 kg enters a banked turn covered with ice at a velocity of 65.0 km/h. The road is banked at an angle of 20°. The radius of the turn is found to be 91.9 m using the equation r = v²/gtanθ.
The banked turn covered with ice A banked turn is a turn or curve in which the vehicle follows a circular path. The car of mass M=1200kg traveling at 65.0 km/h enters a banked turn covered with ice. There is no friction between the road and the car's tires. Use g=9.80m/s² throughout this problem. The road is banked at an angle of θ=20°. We have to find the radius r of the turn. Assuming the car continues in uniform circular motion around the turn, the centripetal force required to keep the car moving in a circle is given by the equation:Centripetal force, Fc = mv²/r, where, m is the mass of the car, v is the velocity of the carand,r is the radius of the turn. Since the car is moving in uniform circular motion, we can equate the centripetal force to the gravitational force. This is because the gravitational force is acting downwards, towards the centre of the circle, which is also the direction in which the centripetal force is acting. Hence we can say that Fc = mg, where,m is the mass of the car and, g is the acceleration due to gravity.Substituting the above equations for Fc and mg, we getmv²/r = mgtanθMultiplying both sides by rm, we getv² = grtanθTherefore,r = v²/gtanθwhere,v is the velocity of the car and, g is the acceleration due to gravity.Substituting the given values, we getv = 65.0 km/hour = 18.1 m/sθ = 20.0°g = 9.80 m/s²Therefore,r = (18.1 m/s)² / (9.80 m/s² × tan 20.0°) = 91.9 mSummary: The banked turn is a turn or curve in which the vehicle follows a circular path. A car of mass M = 1200 kg traveling at 65.0 km/hour enters a banked turn covered with ice. The road is banked at an angle θ = 20.0 ∘. We have to find the radius r of the turn. Assuming the car continues in uniform circular motion around the turn, the radius r can be found by using the equation r = v²/gtanθ. Substituting the given values, the radius r is 91.9m.For more questions on velocity
https://brainly.com/question/80295
#SPJ8
A car accelerates from rest to 31.8 m/s in 6 sec. What is the
acceleration?
See this solution.
Click on the picture to view full solution.
Hope it helps
In hiking, what fitness component is required of you
Wat is the volume of a marble in mL?
Need help with both questions FAST. Please actually help
Answer:
the first one is oil and water and the second one I am between homogeneous mixture and compound
Jordan wants to know the difference between using a 60-W and 100-W lightbulb in her lamp. She calculates the energy it would take to use each bulb for 30 s by using this equation:
Power = Energy transferred (J)/time (s)
What is the difference in the amount of energy transferred by the two bulbs during this time?
A. 40 J
B. 1200 J
C. 1800 J
D. 3000 J
Answer:
B. 1200 J
Explanation:
Hello.
In this case, given the powers, we compute the energy transferred as shown below:
[tex]E=P*t\\\\E_1=60J/s*30s=1800J\\\\E_2=100J/s*30s=3000J\\\\Difference=3000J-1800J\\\\Difference=1200J[/tex]
Therefore, answer is B. 1200 J .
Best regards.
If a radioactive substance has a half-life of 262 years, and I have 2 grams of that substance initially, how much would I have left after 262 years? I
Do you think people used energy before modern times? why or why not?
Answer:
Explanation:
yes because they relied on the sun and burned wood, straw, and dried dung when the sun failed them
why cant we always see the stars that are all around us
1. How are each of Newton’s Laws of motion demonstrated
in the flight of an airplane?
Newton’s Law of Inertia:
Newton’s Law of Acceleration:
Newton’s Law of Action / Reaction:
Answer:
Newton's law of inertia - His first law states that every object remains at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... This is the first part cited in Newton's first law; "there is no net force on the airplane and it travels at a constant velocity in a straight line."
Newton's law of acceleration - "a net external force changes the velocity of the object. The drag of the aircraft depends on the square of the velocity. So the drag increases with increased velocity."
Newton's law of Action/Reaction - "As a plane flies, the force of the air hitting the plane is always equal and opposite to the force of the plane pushing against the air. The force generated by the engine pushes against air while the air pushes back with an equal and opposite force."
Hope this helps! god bless :)
Please give me brainliest!
How are temperature and average kinetic energy related? Explain.
Answer:
Explanation:
Suppose you have a box filled with all sorts of molecules that won't react with each other.
Suppose further that these molecules move. What formula are they obeying? the answer is Ke = 1/2 m v^2.
Now the mass is not going to change, but what about v, the velocity. It certainly can change.
Suppose further, that the molecules are in a closed container. Suppose that the box is heated up. What will happen? The molecules can't escape. All they can do is move faster (remember that they are trapped inside the box). Their mass won't change.
So if you put a thermometer inside a cork into a whole where the cork will seal the hole, what will the thermometer record. Those fast moving molecules will hit the thermometer and make the molecules of the thermometer move faster. The liquid inside the thermometer will measure the Ke of the molecules. So temperature is related to Ke.
The more heat, the faster the molecules are moving. The more they move, the more Ke is being transferred to the thermometer. The more heat transferred to the thermometer, the more the liqiuid in the thermometer will expand, and the higher the temperature.
So shortly temperature is the measurement of Ke inside the closed container that is filled with gas molecules.
