Explanation:
Because water has no uniform rate of expansion and it vaporizes easy when temperature increases that makes it difficult to read.
the energy carried by sound waves is called -
Answer:
kinetic mechanical energy
Answer:
Those sound waves are called kinetic mechanical energy
Explanation:
Sound energy is the result when a force, either sound or pressure, makes an object or substance vibrate. That energy moves through the substance in waves. Those sound waves are called kinetic mechanical energy.
when light bounces off a rough surface, in different directions, what is this called?
Which forces are acting on the shoe as you drag it across the floor?
friction and applied
friction, applied, and gravity
friction and gravity
friction, applied, gravity, and normal
Answer:
I put friction and applied
Explanation:
Một đoạn mạch gồm R1=8 ôm;R2=12 ôm.biết R1 nối tiếp với đoạn mạch gồm R2 song song với R3; R3=1/2 R2 cường độ dòng điện chạy qua mặt chính là 2A
a. Hãy vẽ sơ đồ mạch điện trên
b. Tính điện trở tương đương toàn mạch
c. tính cường độ dòng điện qua mỗi điện trở
Answer:
Explanation:
a.
b. R3= 1/2R2=6 ôm
R12= R1+R2=20 ôm
Rtđ=R12.R3/R12+R3= 4,62 ôm
c. U= I.Rtđ = 2.4,62=9,23 V
I1=I2= 9,23/20= 0,4615 A
I3= 2-0,4615=1,5385 A
an object is moving forward with a constant velocity. which statement about this object must be true?
Answer:
• Its acceleration is zero
Explanation:
from definition of acceleration:
[tex]{ \rm{acceleration = \frac{change \: in \: velocity}{time} }} \\ \\ { \rm{acceleration = \frac{ \delta \: (velocity)}{time} }}[/tex]
• since velocity is constant, change in velocity is zero
[tex]{ \boxed{ \rm{ \delta \: (velocity) = 0}}}[/tex]
• therefore:
[tex]{ \rm{acceleration = \frac{0}{time} }} \\ \\ { \boxed{ \tt{acceleration = 0 \: m {s}^{ - 2} }}}[/tex]
can a system have kinetic and potential energy at the same time
Answer:
yes
Explanation:
...........................
a spiral galaxy can be described as what type of shape
Spiral galaxies are also known as twisted collection of stars and gas that have often beautiful shape and are made up of hot young stars.
There are various types of galaxies based on their shapes such as spiral, elliptical, oval etc. The spiral shaped galaxies are called spiral galaxies.
What are galaxies?Galaxies are a groups of stars, dust and dark matter which are connected by the gravitational force. There are billions of galaxies in the universe and each containing trillions of stars. The galaxy nearest to earth is milky way.
The spiral structure that radiate from the galactic disc's core and give spiral galaxies their name. The central bulge, at the ends of which the spiral arms originate, is seen to have an additional component in the shape of a bar-like structure in about two-thirds of all spirals.
Nearly the course of the universe's history, the ratio of barred spirals to barless spirals has probably varied, going from only 10% approximately 8 billion years ago to about a quarter 2.5 billion years ago to over two-thirds of the galaxies in the observable universe at the present.
To find more about galaxies, refer the link below:
https://brainly.com/question/24836631
#SPJ5
A 100 kg physics teacher pushes a 1.0 kg physics textbook across a 222 kg physics demo table. The teacher applies 5.0 N of force to start the book sliding and 4.0 N to keep it sliding at a constant 0.30 m/s across the table.
Sketch a free body diagram showing all the forces acting on the book as the teacher pushes it.
1 . What is the magnitude of the weight of the book?
2. What is the magnitude of the normal force of the table on the book?
4. What is the coefficient of static friction between the book and the table?
5. What is the coefficient of kinetic friction between the book and the table?
6. If the teacher stops pushing the book, what is the magnitude of the net force on the book?
7. What acceleration does the book have after the teacher stopped pushing it?
8. How far does the book slide before coming to rest?
Answer:
1) 1kg
2) 9.81kg
4) 5N
5) 4N
6) 0N
7) 0N
8) 13
Explanation:
An arrow fired horizontally at 44m/s travels 23m horizontally before it hits the ground From what height was it fired?
Why do patterns of earthquakes become deeper the farther the distance from a plate boundary?
Answer:
The result is that epicentres of earthquakes farther to the interior of the overriding plate will correspond to increasingly deep earthquakes.
I need help please
I’ll give BRAINLIST for correct answers!!
Answer:
1. the graph is showing the speed of the object at different times.
Explanation:
2. the object is slowing down
What is the density of an object that weighs 500 kg and has a volume of .4 cubic meters ?
Answer:
1250 for .4
125 for 4
Explanation:
[tex]p=\frac{m}{v}[/tex]
500/4 = 125
500/.4 = 1250
11. A roller coaster car is moving slowly up a long ramp to the very top of the roller coaster. It goes over the top and starts down a steep slope and it picks up speed rapidly as it rolls down an almost vertical slope. Four seconds later, at the bottom of the steep slope, its velocity is 28 m/s. The average acceleration during those 4 seconds was 6 m/s2 . What was the initial velocity of the roller coaster car as it started down the slope?
Answer:
a = (v2 - v1) / t
a t = v2 - v1
v1 = v2 - a t
v1 = 28 m/s - 6 m/s^2 * 4 s = 4 m/s
how to find the density of air?
newton’s law of gravity says the gravitational force between two objects is proportional to:
Answer:
Mass of the object or earth
A sodium atom has 11 electrons. How many orbitals in a sodium
atom contain electrons?
I NEED A 100% ACCURATE ANSWER FOR THIS QUESTION ASAP NO LINKS !!!
Answer:
B
Explanation:
sometimes when a chemical change ----------- occurs of a substance will change
shape
color
size
mass
Answer:
Chemical changes occur when a substance combines with another to form
Explanation:
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
1. When an apple falls towards the earth , the earth moves up to meet the apple. Is this true? If yes , why is the earth's motion not noticeable ?
2. An astronaut is said to be weightless when he/she travels in a satellite. Does it mean that the earth does not attract him / her ? Give reason.
3. What happens to the weight of a body when it is falling freely under the action of gravity ?
Help!! Random/Irrelevant / Plagiarised answers will be reported*
<3 Thanks! :)
Answer:
1.no because the apple fall towards the earth due to gravity.
2.Yes because when he/she is too far from earth the earth's gravity is not strong enough to pull them down and because there is no gravity in space.
3.It falls down and becomes much more heavy.
Explanation:
give brainliest
The table contains the planets in our solar system in order of their average distance from the Sun and their corresponding diameters. The first step in creating a model of the solar system is to scale these large diameters into smaller, more manageable numbers. Eventually, we’ll represent these numbers using circles drawn on paper. MercuryVenusEarthMarsJupiterSaturnUranusNeptune Diameter (km)487912,10412,7566792142,984120,53651,11849,528 Scaled Diameter (cm) 3.51.9 The ratio between Earth’s actual diameter and its scaled diameter can be used to find the scaled diameter of the other planets. Earth’s diameter of 12,756 kilometers is scaled to 3.5 centimeters as shown in the table. Now let’s find the scaled diameter of Mars as an example. Using the calculations shown, Mars’s diameter of 6,792 would be scaled to 1.9 centimeters. d × 12,756 = 6,792 × 3.5 d = 1.9 cm Use this same process to complete the table with the scaled diameters of the other planets. Round each answer to the tenths place. If you need additional math help, visit the Proportions section of the Math Review.
The scaled diameters of the missing planets are listed below:
Mercury 1.4 cm
Venus 3.3 cm
Mars 1.9 cm
Jupiter 39.2 cm
Saturn 33.1 cm
Uranus 14.0 cm
Neptune 13.6 cm
How to determine the scaled diameters of a planet
In this question we must use conversion factor to calculate the scaled diameters by means of the following direct relationship:
d = k · D (1)
Where:
D - Real diameter, in kilometers.d - Scaled diameter, in centimeters.k - Conversion factor, in centimeters per kilometer.The conversion factor is found by using the real and scaled diameter of the Earth:
k = 3.5 cm/12,756 km
k = 7/25512 cm/km
Then, we determine the scaled diameters of the rest of planets:
Mercury 1.4 cm
Venus 3.3 cm
Mars 1.9 cm
Jupiter 39.2 cm
Saturn 33.1 cm
Uranus 14.0 cm
Neptune 13.6 cm
Remark
The statement reports a table with numerous mistakes, the correct table is shown below:
Planet Diameter (km) Scaled Diameter (cm)
Mercury 4,879
Venus 12,104
Earth 12,756 3.5
Mars 6,792
Jupiter 142,984
Saturn 120,536
Uranus 51,118
Neptune 49,528
To learn more on scale factors: https://brainly.com/question/22312172
#SPJ2
What is the meaning of Rusting Of Iron
Plz help me
Answer:
an oxidation reaction i think that's the answer
Explanation:
Explanation:
Rusting of iron refers to the formation of rust, a mixture of iron oxides, on the surface of iron objects or structures. This rust is formed from a redox reaction between oxygen and iron in an environment containing water.
Hope this helps!!
Have a blessed day <33
Which elements belong to the family known as noble gases?
Answer:
Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn)
Explanation:
hope this helps
Why is the temperature of a normal healthy old man is less than that of a normal healthy young man?
Answer:
Normal body temperature does not change much with aging. But as you get older, it becomes harder for your body to control its temperature. A decrease in the amount of fat below the skin makes it harder to stay warm.
Which of the following is true statement about speed?
a) Speed has no magnitude and direction
b) Speed has magnitude but no direction
c) Speed has both magnitude and direction
D) speed has magnitude but no direction
B and D are both the same statement.
It's the correct one.
A student is given a red and a blue liquid. The two samples of liquids are
heated in identical beakers over identical Bunsen burners. The red liquid
shows a dramatically faster increase in temperature. Which of these is the
most likely explanation for this? *
O A) The red liquid has a greater mass.
O B) The blue liquid has a smaller mass.
O C) The red liquid has a greater specific heat.
OD) The red liquid has a smaller specific heat
When a substance has smaller specific heat it needs less heat to shows changes in it hence making the option D correct.
Answer:
option D) the red liquid has a smaller specific heat
Explanation:
Why is an element considered a pure substance?
Answer:
An element is a pure substance and is made of only one type of atom.
Explanation:
It cannot be broken down into a simpler substance.
What is the initial velocity of a moose who
accelerates uniformly at 1.5 m/s/s for 5 seconds and
finishes with a velocity of 7 m/s?
Answer:
- 0.5 m/s
Explanation:
(1) Acceleration = change in velocity / time
(2) Change in velocity = (Final velocity - Initial velocity)
We know:
acceleration = 1.5 m/s/s
time = 5 seconds
final velocity = 7 m/s
x = initial velocity)
1.5 = ( 7 - x ) / 5
1.5 x 5 = ( 7 - x )
7.5 = 7 - x
x = -0.5 m/s
You can check the answer by plugging in the values to equation (1).
A car drove 6 km east, turned 90° to the north, and drove 8 more km. What is the cars
displacement from where they began?
Answer:
14 km away and a turn of 90°
Explanation:
brailiest pls pls pls
What is the final monetum of the artist clay system immediately after the collision
Answer:
the total mass of the objects multiplied by their velocity.
3. A block is pushed with 30N of force this changes the velocity from 20m/s to
30m/s, after 2 seconds. What is the mass?
let's find the acceleration first :
[tex] \boxed{a = \frac{v - u}{t} }[/tex][tex]a = \dfrac{30 - 20}{2} [/tex][tex]a = \dfrac{10}{2} [/tex][tex]a = 5 \: \: ms {}^{ - 2} [/tex]now, we know that :
[tex]f orce= mass \times acceleration[/tex][tex]30 = m \times 5[/tex][tex]m = \dfrac{30}{5} [/tex][tex]m = 6 \: \: kg[/tex]hence, mass = 6kg