Answer:
heat?
Explanation:
Why are Physical changes Not represented by Equations
Physical changes are not represented by equations because it does not involve rearrangement of atoms.
WHAT IS A PHYSICAL CHANGE:A physical change is a change that does not involve formation of new substances. Since no new substances are formed, this means that the atoms of the substance is not broken or rearranged. Unlike chemical changes, physical changes involves a change in state of matter.Therefore, physical changes are not represented by equations because it does not involve rearrangement of atoms.
Learn more about physical change at: https://brainly.com/question/864557
Explain how do global winds impact weather in an area?
Answer:
As the warmer air over the equator rises, colder air from the poles rushes toward the equator to take its place. Global winds push air masses around Earth and bring changes in the weather. In the United States, global winds called the prevailing westerlies push air masses from west to east.
Explanation:
Answer:
As the warmer air over the equator rises, colder air from the poles rushes toward the equator to take its place. ... Global winds push air masses around Earth and bring changes in the weather. In the United States, global winds called the prevailing westerlies push air masses from west to east.
Explanation:
what is the speed of a horse in meters per second that runs a distance of 1.2 miles in 2.4 minutes
What current is used to power the Untied States power grid? O alternating current O direct current
Answer:
Alternating
Explanation:
It is alternating because it is easy to distribute long distance.
Direct current is found in batteries and have large voltage drop over distance.
Answer:
alternating
Explanation:
it was right on my quiz
A football is kicked at ground level with a speed of 17.0 m/s at an angle of 40.0º to the horizontal. How much later does it hit the ground and what is its maximum height?
Answer: well...
Explanation: Suppose you walk 18.0 m straight west and then 25.0 m straight north. Show that the order of addition of three vectors does not affect their sum . launched at ground level with an initial speed of 50.0 m/s at an angle . (b) What is the maximum height reached by the arrow along its .
PLEASE HELP ME
Which statement below accurately compares resistance and resistivity?
A. Resistance does not depend on size, shape, or amount of a material, while resistivity does.
B. Resistivity does not depend on size, shape, or amount of a material, while resistance does.
C. Resistance and resistivity both depend on size, shape, or amount of a material.
D. Resistance and resistivity are two words for the same physical property of a material and are measured in ohms.
The average force of a baseball is 18.9 N. Its mass is 0.145 kg.
Find the acceleration.
2.
a 130 m/s2
b
156 m/s2
С
75 m/s2
d
110 m/s2
Answer:
a
Explanation:
using f=ma
a=f/m
=18.9/0.145
=130.344
=130
Electrons have a mass of about _____.
A. 2,000 times that of a neutron
B. 1/2,000 that of a proton
C. the same as a neutron
D. the same as a proton
Answer:
B. 1/2,000 that of a proton
Explanation:
the mass of an electron is 9.1093837015 × 10−31 kg, this in only 1/2,000 that of a proton.
Answer:
D. the same as a proton
Explanation:
um just trust me lol
Which force keeps an object moving in a circle? centripetal force fluid friction inertia momentum
Answer:
Any object moving in a circle (or along a circular path) experiences a centripetal force. That is, there is some physical force pushing or pulling the object towards the center of the circle. This is the centripetal force requirement.
Explanation:
help ASAP
A golf ball is sitting still on the grass three feet from the hole. Which statement describes the golf ball's motion? * The golf ball has a constant velocity. The golf ball is accelerating.
Answer:
The golf ball has a constant velocity
Explanation:
Which strategies maximize recovery following an intense bout of resistance training?
(Select all that apply.)
replenishing low blood sugar with carbohydratesreplenishing low blood sugar with carbohydrates , ,
stretching muscle groups, holding each stretch for 30 seconds or morestretching muscle groups, holding each stretch for 30 seconds or more , ,
allowing muscle groups 8–12 hours of rest before training againallowing muscle groups 8–12 hours of rest before training again , ,
drinking 20–24 ounces of water for every pound of body mass lostdrinking 20–24 ounces of water for every pound of body mass lost , ,
Answer:
The answers are:
a) drinking 20–24 ounces of water for every pound of body mass lost,
b) stretching muscle groups, holding each stretch for 30 seconds or more, and
c) replenishing low blood sugar with carbohydrates
Explanation:
I just took the exam and got this correct.
A dog barks to alert his owner. What is the medium for the sound waves produced by the dog barking?
Answer:
The medium for the sound waves produced by the dog barking is the air
Explanation:
Sound waves are a form of mechanical waves such that it moves from one point to another by the vibration, back and forth of the medium particles from one layer to the next, thereby the particles of the medium remain in the same location and only the wave energy is propagated
The medium which has particles that vibrate back and forth in order to transmit the barking of the dog is the air.
Show the mathematical equation for
calculating the number of Neutrons an
atom has using its Atomic Number and
Atomic Mass
Answer:
ysyywhwywywyyeueueuwieheheuhrr9
a man of mass 50 kg climbs up stairs each of height 0.2 m in 20 seconds .calculate the power of the man
A fast car (Car A) and a slow car (Car B) both travel the same distance. Which car takes more time to do this? Explain.
Answer:
Input work is the work done on a machine as the input force acts through the input distance. This is in contrast to output work which is a force that is applied by the body or system to something else. Output work is the work done by a machine as the output force acts through the output distance.Jan 15, 2020 whhdbd dhd dvd s bs sbs shs shs sh s
Explanation:
avsvsyxsgzvs zvx shs dhx xbx dhd dvd dj
A girl and her bicycle have a total mads of 42 kg. At the top of the hill her speed is 4 m/s. The hill is 14.3m high and 112m long. If the force of friction as she rides down the hill is 20N, what us the speed at the bottom.
Answer:
13.78 m/s
Explanation:
Given that:
The mass of the girl & her bicycle = 42 kg
The speed at the top of the hilll= 4 m/s
The height of the hill = 14.3 m
The length of the hill (distance) = 112 m
The frictional force = 20 N
To find the speed at the bottom of the hill; we need to carry out the following processes.
The workdone by gravity = mass × acceleration due to gravity × Δh
= 42 × 9.8 × ( 14.3 - 0 )
= 5885.88 joules
The workdone by the friction = Force × distance = - 20 × 112 (since she is riding down the hill)
The workdone by the friction = -2240 Joules
The initial Kinetic friction = 1/2 mv²
= 1/2 × 42 × 4²
= 336 Joules
The final kinetic energy = Initial Kinetic energy + total work
The final kinetic energy = (336 + 5885.88 - 2240) Joules
The final kinetic energy = 3981.88 Joules
Using the final kinetic energy = 1/2 mv²
3981.88 = 1/2 × 42 × v²
3981.88 = 21 v²
v² = 3981.88/21
v² =189.61
v = [tex]\sqrt{189.61}[/tex]
v = 13.78 m/s
Therefore, the speed at the bottom = 13.78 m/s
What must happen to the electric current in power lines before it can safely enter your home?
It passes through a step-up transformer.
It passes through a turbine.
It passes through a generator.
It passes through a step-down transformer.
Answer: use the step down transformers to reduce these voltages in the power lines before they are supplied to the users.
Explanation:
Answer:
It passes through a step-down transformer.
Explanation:
Electric current in power lines must be stepped down before they enter our homes because they carry a very high voltage.
The voltage can destroy appliances that have very low voltage.
In this regard, a step down transformer is used to achieve this effect. The transformer brings the voltage to a level fit to consumers to use. When voltage is stepped down, appliances can work perfectly.What would be the cause of bubbles appearing on the surface of a leaf? A.Photosynthesis is occurring and bubbles of oxygen gas are being absorbed into the plant leaf from the water. B.Photosynthesis is occurring and bubbles of oxygen gas are being released into the surrounding area.
Can someone plz check if what I typed is good :)
An Earthquake has caused this, I know this because of the rubble. I know it's not a tornado or something similar because this building has collapsed, not blown away neither has it been lifted a few feet from where it used to be and the building next to it is damaged but still standing. Many earthquakes that are violent enough have the power to make buildings collapse, because of the vibration of the ground. Earthquakes are usually caused when rock underground suddenly breaks along a fault. So an earthquake is actually the result of sudden releases of high energy that take place from the crust of Earth. Since an earthquake leads to travelling waves of high intensity, such waves can easily give a jolt or shock to any building. So in conclusion I think an earthquake caused this in the picture because many earthquakes that are violent enough have the power to make buildings collapsed, because of the vibration of the ground.
Answer:
Explanation:
(v) Which of the following is
responsible for wearing out of bicycle
tires?
(a) Muscular force
(b) Magnetic force
(c) Frictional force
(d) Electrostatic force
a car travels 15 miles in 30 minutes . calculate the average speed
Answer:
15/30 = .5 miles/m
Explanation:
v = d/t
velocity = 15 / 30
An Ewok accelerates (at a light jog) at 5 m/s/s with only 20 newtons of force. What is the mass of our furry friend?
Answer:
4 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{20}{5} \\ [/tex]
We have the final answer as
4 kgHope this helps you
Answer:
XD
Explanation:
XD furry friend
Furry's muck eachother
A canoe accelerates 3 m/s/s when a force of 6 newtons is applied to it. What is the mass of the canoe and passengers?
Anna is sitting in a moving cart and throws a ball straight up. Theoretically, the ball should land in the cart, but it lands on the ground a little before the cart. What is the reason for the difference in the ranges of the ball and the cart?
Answer:
Reason for the difference in the ranges of the ball and the cart:
"the average speed of the cart is less than the instant speed of the cart at the time of throwing the ball".
Explanation:
Assuming that the air friction is negligible.
Given that the ball lands on the ground a little before the cart.
So, the range of the ball is more than the range of the cart in the same time interval.
Let the instant speed of the cart is v m/s at the time of throwing the ball in the vertically upward direction, so the speed of the ball in the horizontal direction = v m/s.
Let t be the total time of flight of the ball.
As the gravitational force is acting in the downward direction so it will not change the horizontal velocity of the ball.
So, the range covered by the ball [tex]= vt[/tex] m.
Let u be the average speed of the cart for the time t s (same as the time of flight of ball).
So, the distance by the cart [tex]= ut[/tex] m
As the range of the ball is more than the range of the cart in the same time interval, so
[tex]vt > ut \\\\\Rightarrow v>u.[/tex]
So, the reason for the difference in the ranges of the ball and the cart is "the average speed of the cart is less than the instant speed of the cart at the time of throwing the ball".
What changes and challenges have you noticed in your relationship with your friends? Write a paragraph
explaining your answers.
Answer:
While in a relationship, friends can influence you to love your partner in different ways, sometimes because of how they also relate with their partners or what they say to you about your partner or the advice they give about and in your relationship.
Explanation:
PLEASE HELP COME UP WITH 5 MULTIPLE CHOICE QUESTIONS FROM HEALTH RELATED FITNESS AND SKILL RELATED QUESTIONS
Answer:
1. What is not considered a cardiovascular workout?
A. Jogging
B. Sit ups
C. Jump Ropes
D. Burpees
Explanation:
I am sorry, I am in middle school and I only have one question.
Which statement best describes the importance of joints in the roadways of Bridges ?
a. Joints strengthen the roadway to support cars and trucks
b. Joints allow the roadway to expand and
contract with varying outside temperatures
c. Joints allow the roadway to expand and contract as cars put force on the bridge
d. Joints allow the bridge to be built in smaller, easier to assemble pieces.
Can you help me with this pls
Answer:
Can you help me with this pls
SOMEONE PLEASE PLEASE HELP PLEASE PLEASE HLEP
What is the equation for work?
Work = force + distance
Work = force / distance
Work = force - distance
Work = force * distance
Answer:
I believe it's work=force*distance
In a series circuit, an ammeter shows the current leaving the positive end of a cell is 0.5A. What current flows into the negative end of the cell?
Answer:
0.5A as in a series circuit the current is the same everywhere
Explanation:
