Answer:
Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction—or change both.
If 30.45 grams of water is to be heated up 3.3 degrees to make baby
formula, how much heat must be added? The specific heat of water is
4.18 J/g °C.
A. 420 J
B. 281 J
C. 1604 J
D. 410 J
Answer:
A. 420 J
Explanation:
Given the following data;
Mass = 30.45 g
Specific heat capacity = 4.18 J/g °C.
Temperature = 3.3°C
To find the quantity of heat;
Heat capacity is given by the formula;
[tex] Q = mct [/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
t represents the temperature.
Substituting into the equation, we have;
[tex] Q = 30.45 * 4.18 * 3.3 [/tex]
Q = 420.03 ≈ 420 Joules
B 0.25 m A stone weighing 0.7 kilograms rolls down the inclined plane from position B to position A. Position A is located at sea level. The difference in the gravitational potential energy of the ball between positions A and B is about 9.8 N/kg. ) joules. (Use PE= mxgx h, where g
Answer:
-1.715J
Explanation:
B: (9.8)(0.7kg)(0.25m)=1.715J
A: (9.8)(0.7kg)(0)=0J
Calculate the distance between a 3.0 x 10^-5 charge and a 2.0 x 10^-6 2 points
C charge if the force between them is 1000 N.
Answer:
thanks for answer:)
Explanation:
how to calculate light year, minute and second?
Answer:
A light-year is the distance light travels in one year. How far is that? Multiply the number of seconds in one year by the number of miles or kilometers that light travels in one second, and there you have it: one light-year. It's about 5.88 trillion miles (9.5 trillion km).
Explanation:
Which material is colder in a room where all the objects are in for a long time?
A. all objects are the same temperature
B. wooden desk
C. a metal chair
D. a smart board
True or False: A higher vapor pressure (evaporates easily) corresponds to strong intermolecular forces. (dont answer)
anyways free p o i n ts...
Answer:
truuuuuuuuuuuuuuuuuuuuuuuuujuuuuuuuur
Answer:
true
Explanation:
I took a test this year and I know the answer
A 1.25 m long pendulum on Mars
has a period of 3.65 s. What is the
acceleration of gravity g on Mars?
(Unit = m/s^2)
Help please
Explanation:
[tex]period = 2\pi \sqrt{ \frac{length}{g} } [/tex]
[tex]3.65 \: s = 2\pi \sqrt{ \frac{(1.25 \: m)}{g} } [/tex]
Squaring both sides and solving for g, we get
g = 3.70 m/s^2
which is close to what is expected (3.71 m/s^2).
A ball sits on the table not moving. A child comes along and gives the ball a push. Which law is best described by this example?
A. Newton's First Law
B. Newton's Second Law
C. Newton's Third Law
D. Avagadro's Law
Answer:
A Newton's First law
Explanation:
In Newtons first law of motion it states that that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. Which mean the ball will not move until the force of the child come and pushes on the ball.
A 2800 kg truck moving at 12 m/s to the right hits a stopped 1100 kg car. What is the combined velocity the moment they stick together?
Answer:
The combined velocity is 8.61 m/s.
Explanation:
Given that,
The mass of a truck, m = 2800 kg
Initial speed of truck, u = 12 m/s
The mass of a car, m' = 1100 kg
Initial speed of the car, u' = 0
We need to find the combined velocity the moment they stick together. Let it is V. Using the conservation of momentum.
[tex]m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{(m_1+m_2)}\\\\V=\dfrac{2800\times 12+0}{2800+1100}\\\\V=8.61\ m/s[/tex]
So, the combined velocity is 8.61 m/s.
A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled's potential energy?
(Formula: PE = mgh)
Answer:
PE = 882 J
Explanation:
Through the International System we know that the gravity of the earth is 9.8 m/s², so...
Data:
m = 45 kgg = 9.8 m/s²h = 2 mPE = ?Formula:
[tex]\boxed{\bold{PE=m*g*h}}[/tex]Replace and solve:
[tex]\boxed{\bold{PE=45\ kg*\ 9.8\frac{m}{s^{2}}*2\ m}}[/tex][tex]\boxed{\boxed{\bold{PE=882\ J}}}[/tex]The potential energy of the sled is 882 Joules.
Greetings.
Wax, like all matter, comes in many phases. What are the three possible
phases?
A. Mixtures
B. Gas
C. Liquid
D. Solid
Multiple choice pls help
Answer:
A and d
Explanation:
Mixture and solid
for the following equation answer the following:
Al + O2+ heat -----> Al203
1. Balance this chemical reaction
2. What type of chemical reaction is this?
3. is this endothermic or an exothermic reaction
Answer:
4Al + 3O2 + heat ------> 2Al2O3
Explanation:
It is endothermic reaction.
LAST ONE NEED HELP.A car accelerates from rest to 20 m/s, in 5 seconds. The car exerts a force of 6000 N. What is the mass of the car?Single choice.
(2 Points)
1800 kg
1500 kg
1000 kg
900 kg
Answer:
1500kg
Explanation:
Initial velocity(u)=0m/s
Final velocity(v)=20m/s
Time taken=5s
Acceleration=v-u/t
Acceleration=20-0/5=4m/s^2
Force=6000N
Mass=?
Mass=Force/acceleration
= 6000/4
=1500kg
NEED HELP The main difference between kinetic energy and potential energy is thatSingle choice.
(2 Points)
kinetic energy involves position, and potential energy involves motion.
kinetic energy involves motion, and potential energy involves position.
although both energies involve motion, only kinetic energy involves position.
although both energies involve position, only potential energy involves motion.
Answer:
kinetic energy involves motion, and potential energy involves position.although both energies involve position, only potential energy involves motion.hope it is helpful to you ☺️☺️✌️
A man is driving his 1100 kg car at 36 km/h on a straight freeway. After accelerating for 30 seconds, the car
has a speed of 108 km/h. How much work did the engine do during the 30 seconds?
Answer:
W = 439998 J = 439.99 KJ
Explanation:
First, we will calculate the acceleration of the car by using the first equation of motion:
[tex]v_f = v_i + at\\\\a = \frac{v_f-v_i}{t}[/tex]
where,
a = acceleration = ?
vf = final speed = [tex]108(\frac{km}{h})(\frac{1000\ m}{1\ km})(\frac{1\ h}{3600\ s})[/tex] = 30 m/s
vi = initial speed = [tex]36(\frac{km}{h})(\frac{1000\ m}{1\ km})(\frac{1\ h}{3600\ s})[/tex] = 10 m/s
t = time = 30 s
Therefore,
[tex]a = \frac{30\ m/s - 10\ m/s}{30\ s}[/tex]
a = 0.67 m/s²
Now, we will calculate the force applied by the engine:
F = ma
where,
F = force = ?
m = mass = 1100 kg
Therefore,
F = (1100 kg)(0.67 m/s²)
F = 733.3 N
Now, we will calculate the distance covered by the car by using the second equation of motion:
[tex]s = v_it+\frac{1}{2}at^2\\\\s = (10\ m/s)(30\ s)+\frac{1}{2} (0.67\ m/s^2)(30\ s)^2[/tex]
s = 600 m
Now, the work done (W) by engine can be calculated as follows:
W = Fs
W = (733.3 N)(600 m)
W = 439998 J = 439.99 KJ
Why do you think fixed boundaries ""flip"" waves and loose boundaries do not?
Answer:
When the obstacle is fixed, the law of action and reaction, makes the reflected wave is inverted.
When the obstacle is mobile, he mobile point, it moves in the direction of the wave, therefore there is no inversion of it.
Explanation:
Waves when they reach an obstacle behave like a shock, therefore if we use the conservation of momentum the wave must reverse its speed, this explains that the speed changes sign, the wave is reflected.
When the obstacle is fixed, the wave when it reaches the obstacle exerts a force on the point, by the law of action and reaction the point exerts on the wave a force of equal magnitude but in the opposite direction, this reaction force which makes the reflected wave is inverted.
When the obstacle is mobile, this is without friction, when the wave arrives it exerts a force on the mobile point, it moves in the direction of the wave, reaching the maximum amplitude of the incident wave, when it is reflected the point begins to go down along with the wave, therefore there is no inversion of it.
Assignment
S
of
write the Symbol
Told, mercury and
Cooper, Iron,
Lead
Answer:
Check explanation
Explanation:
Gold - Au (Aurum)
Mercury - Hg (Hydrargyrum)
Copper - Cu (Cuprum)
Iron - Fe (Ferrum)
Lead - Pb (Plumbum)
These elements in the periodic table are some of the elements represented by letters not in line with their names.
This is because, these elements were known in ancient times and therefore, they are represented by letters from their ancient names.
Give details of aids in brief and explain how to protect yourself and prevent.
Answer:
(AIDS) is a chronic, potentially life-threatening condition caused by the human immunodeficiency virus (HIV). By damaging your immune system, HIV interferes with your body's ability to fight infection and disease. HIV is a sexually transmitted infection (STI). It can also be spread by contact with infected blood or from mother to child during pregnancy, childbirth or breast-feeding.
Explanation:
To help prevent the spread of HIV: 1. Use treatment as prevention (TasP). If you're living with HIV, taking HIV medication can keep your partner from becoming infected with the virus.
1. This force keeps an object floating _______________________ 2. When the force of gravity is stronger then the buoyant force an object will ___________ 3. When the buoyant force is the same as the force of gravity an object will ____________ 4. When the buoyant force is greater than the force of gravity an object will ____________ 5. Why does an aircraft carrier float
Answer:
1) Buoyant force, 2) sinks, 3) equilibrium, 4) fleet , 5) LIFT force
Explanation:
A body in a fluid is subjected to two forces, its weight and the thrust
sun F = B - W
the em
bid is always vertical and contrary to weight, let's analyze and complete the different situations presented
1) Buoyant force
2) sinks B <W
3) equilibrium B = W
4) fleet B> W
5) by the sum of two forces:
* Thrust, but the density of air is much less than the density of water, therefore the thrust in the air is less.
* The other force in airplanes the lift force given by the difference in the path of the air when the plane moves, which translates into a pressure difference between the upper part of the wing and the lower part, it is force is called LIFT force
what is the symbol end unit for electric charge
Answer:
The SI unit of electric charge is the coulomb and is represented by the symbol C.
[tex] \large\sf \leadsto\pmb{ Symbol \: Unit \: For \: Electric \: Charge}[/tex]
[tex] \sf \blue {The \: SI \: unit \: of \: electric \: charge \: is \: coulomb \: which \: is \: also \: represented \: as \: C!}[/tex]
Question 4
The diagram represents the motion of a sound wave. The distance between points A and C is 9 meters (m), and it initially takes the wave 3 seconds (s) to travel.
What will be the wavelength of the sound wave if the velocity of the wave remains constant but the pitch is tripled?
A 3 meters
B 6 meters
с 9 meters
D 18 meters
Answer:A
Explanation:
The wavelength of the sound wave will be 3 meters.
What is wavelength?
The wavelength of any wave is defined as the distance between two max adjacent amplitudes, or the distance between two successive troughs or crest.
Now it is given that:
Distance =9 meters
time = 3 seconds
pitch=1/3 seconds
The velocity of the sound will be
[tex]V=\dfrac{d}{t}=\dfrac{9}{3}=3\ \frac{m}{s}[/tex]
Now from the question the wavelength of the sound wave if the velocity of the wave remains constant but the pitch is tripled
so [tex]f=3\times \dfrac{1}{3}=1 herts[/tex]
Now the velocity of the sound will be
[tex]v=f\times \lambda[/tex]
[tex]\lambda=\dfrac{v}{f}=\dfrac{3}{1}=3\ m[/tex]
Thus the wavelength of the sound wave will be 3 meters.
To know more about wavelength, follow
https://brainly.com/question/10728818
Which of the following refers to a force of resistance that acts on an object
when the object moves against other matter?
O A. Balanced force
B. Inertia
C. Friction
D. Contact force
Can work ever be negative?
A)Yes, when force is negative
B)Yes, when displacement is negative
C)Yes, when cos(e) is negative
D)No, work can never be negative
Answer:
B yes when displacement is negative
ASAP!!!!!! I need help is my final
Answer:
bro the answer would be 15m/s north
Explanation:
;)
whats the definition of Light speed
Give three examples of how biotechnology affects our everyday lives.
Write and complete sentences
Site your sources
Answer: But what about beer-brewing, crop breeding, and the antibiotic penicillin? These processes and products – some of which have been around for thousands of years – are also examples of biotechnology.
Explanation:
Specifically, industrial biotechnology uses enzymes and micro-organisms to make bio-based products in sectors such as chemicals, food ingredients, detergents, paper, textiles and biofuels. ... Since that time, industrial biotechnology has produced enzymes for use in our daily lives and for the manufacturing sector.
Match each concept to the scientist who supported it.
Thomas Young
Light is a wave that has similar properties
as radio waves
Christiaan Huygens
Light is a wave made of electric and
magnetic fields.
James Clerk Maxwell
Light is a wave because this property can
explain interference.
Heinrich Hertz
Light is a wave because it bends when it
hits barriers and openings.
Isaac Newton
Light is made of particles because it travels
only in straight paths.
Answer:
1. Heinrich Hertz.
2. James Clerk Maxwell.
3. Thomas Young.
4. Christiaan Huygens.
5. Isaac Newton.
Explanation:
Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
However, the various definitions of light according to early scientists include the following;
1. Heinrich Hertz: Light is a wave that has similar properties as radio waves. Heinrich Rudolf Hertz was a German physicist born on the 22nd of February, 1857 in Hamburg, Germany. The unit of frequency ("Hertz") of an electromagnetic wave was named after him.
2. James Clerk Maxwell: Light is a wave made of electric and magnetic fields. James Clerk Maxwell was a Scottish physicist born on the 13th of June, 1831 in Edinburgh, United Kingdom. He was famously known for his work in the formulation of the classical theory of electromagnetic radiation.
3. Thomas Young: Light is a wave because this property can explain interference.
4. Christiaan Huygens: Light is a wave because it bends when it hits barriers and openings.
5. Isaac Newton: Light is made of particles because it travels only in straight paths.
Answer:
See image
Explanation:
Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
However, the various definitions of light according to early scientists include the following;
1. Heinrich Hertz: Light is a wave that has similar properties as radio waves. Heinrich Rudolf Hertz was a German physicist born on the 22nd of February, 1857 in Hamburg, Germany. The unit of frequency ("Hertz") of an electromagnetic wave was named after him.
2. James Clerk Maxwell: Light is a wave made of electric and magnetic fields. James Clerk Maxwell was a Scottish physicist born on the 13th of June, 1831 in Edinburgh, United Kingdom. He was famously known for his work in the formulation of the classical theory of electromagnetic radiation.
3. Thomas Young: Light is a wave because this property can explain interference.
4. Christiaan Huygens: Light is a wave because it bends when it hits barriers and openings.
5. Isaac Newton: Light is made of particles because it travels only in straight paths.
Two parallel plates have an area of
0.00100 m^2. How much charge
must you place on them to create a
1000 N/C field between the plates?
(The answer is *10^-12 C. Just fill
in the number, not the power.)
Answer:
8.85
Explanation:
The computation of the charge that must place on them in order to create 1000 N/C field between the plates is shown below:
We know that
E = (Q/A) ÷ E_o
1000 = Q ÷ 0.01×8.85× 10^-12
Q = 8.85 × 10^-12
So,
The answer is 8.85
The above formula should be applied so that the correct value could come
And, the same would be relevant
Answer:
8.85
Explanation:
acellus
Why is the EM important?
Answer:
It is important because it furnishes information about the composition, the temperature and maybe the mass or relative velocity of the body that emits or absorbs it.
Explanation:
Protons and neutrons are located in the nucleus of the atom.
Please select the best answer from the choices provided
T
F
Answer:
True
Explanation:
The nucleus contains all of the mass of the atom. Almost all of the mass of the atoms is made up of protons and neutrons.
Answer:
both the neutrons and protons are located in the nucleus of an atom.