Answer:
TRUE
Explanation:
9th grade science here, please help will mark brainliest
Answer:
positive. hope this helped
Explain how the law of conservation of energy applied to the energy transformations that occur from the outlet charger to the ringing phone
Answer: ELECTRICAL ENERGY to CHEMICAL ENERGY to SOUND ENERGY.
Explanation:
There are laws governing the conservation of energy in physics. The first law of thermodynamics states that in a closed system, energy can neither be created nor destroyed during transformation. With this, the total energy of a given system always remains constant.
This first law of thermodynamics which arouse from special relativity, says that changes in the energy of systems will also coincide with changes in a measure of its energy content.
The ELECTRICAL energy from the outlet charger is transformed and stored as CHEMICAL energy in the battery of the phone. This in turn is converted to SOUND energy when the phone rings.
Which unit of measurement is most appropriate for measuring the length of your computer screen?
Answer:
Inches or Centimeters
Explanation:
Inches or centimeters are the most appropriate units of measurement for the computer screen because they are in the form of whole figures that can be easily comprehended. Usually the width of computer screens span from 10 to 20 inches.
Conversion of a 15inches computer to meters;
1inch=0.0254meter
15inches= ?
15inches*0.0254/1
=0.381meters
The above is a very small figure which might be hard for most people to fathom or visualize.
Question 1 of 11
What are two ways space exploration can improve international relations?
DA By urging countries to compete to achieve goals
DB. By helping countries' economies grow weaker
DC. By encouraging countries to share scientific data
DD. By inspiring countries to work together to solve problems
AnswerC and D
Explanation:
Answer: C & D
Explanation: Aplex
Which is NOT a part of an electric motor?
a.
armature
b.
brushes
c.
commutator
d.
slip ring
Which of these force&mass pairs will result in the largest acceleration? *
50 N and 5 kg
60 N and 3 kg
30 N and 1 kg
25 N and 100 kg
10 N and 8 kg
Answer:
30N and 1 kg has largest acceleration
hope it helps youa catcher "gives" with the ball when he catches a 0.196 kg baseball moving at 31 m/s. if he moves his glove a distance of 5.32 cm, what is the average force acting on his hand?
Answer:
3540.5N
Explanation:
Step one:
given data
mass m= 0.196kg
speed v= 31m/s
distance r= 5.32cm = 0.0532m
Step two
The expression relating force, mass, velocity and distance is
F= mv^2/r
substitute we have
F=0.196*31^2/0.0532
F=0.196*961/0.0532
F=188.356/0.0532
F=3540.5N
A bungee jumper starts with 1000 J in their GPE store. After they jump they fall and are brought to a stop with the bungee cord. With the cord fully stretched what is the energy in the EPE store?
Answer:
energy is equal to 1000 J
Explanation:
When the jumper is in the tent, he has a given height, this height gives him a gravitational potential energy, which forms his initial mechanical energy of 1000 J. After jumping, this energy is converted into elastic energy of the rope plus a remainder of potential energy gravitational, it does not reach the ground, but as the friction is negligible the total mechanical energy is conserved, therefore its energy is equal to 1000 J
This is a case of energy transformation, but the total value of mechanical energy does not change
A force has both______ and _______. Question 3 options: Magnitude & Direction Direction & Motion Speed & Impact Speed and Direction
Answer:
A force has both Direction and Motion.
Explanation:
For example, when finding acceleration you take the time and divided it by distance. If the thing you are measuring is going in the positive direction, the acceleration will be positive and if it is going in the negative direction the acceleration will be negative.
Magnitude and Direction
Explanation:
Force is a Vector Quantity
As learned in an earlier unit, a vector quantity is a quantity that has both magnitude and direction. To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction.
What causes wind to follow patterns
Answer: Wind follows a pattern because the Earth is spinning in one motion. If we were spinning in one way then another we would have one day go by then the spinning cycle would change and we would have to go through that day all over again, it would not be logical because then we would be in the same season as well, we would be in one season for the rest of our lives until we died.
I don't know if this was helpfull or not but I hope it was somewhat close to helpful? If it is not then please do not report this, I am sorry if this was the least bit helpful.
HAVE A NICE DAY! :)
30 Joules of energy enter a light bulb. 20 joules of energy are transformed into light; how much energy is dissipated as heat?
A clock's hour hand goes through 1.5 revolutions in 90
minutes.Calculate the angular displacement of the minute hand in
degrees
Answer:
Explanation:
how far around a circle is once around in degees?
1.5 * 360 = 540°
A golfer hits a golf ball upwards at an angle. We can ignore air resistance on the ball.
Which diagram best describes the velocity vectors and trajectory of the golf ball's motion?
Answer:
Check the diagram from the photo
Explanation:
What is the relationship between the frequency of light and refraction?
Answer:
The refractive index of a medium is dependent (to some extent) upon the frequency of light passing through, with the highest frequencies having the highest values of n. It also changes the wave speed, frequency, and wavelength.. Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases
Explanation:
Answer:the higher the frequency the greater the index of refraction
Explanation:The index of refraction of any material besides vacuum varies slightly with the frequency of light too soo basically the more or higher the frequency the greater the refraction (index of refraction)
For example
Say you have green or red light which they have lower frequency that blue or purple
So the index of refraction will be lower
a wagon has a mass of 100 kg an acceleration of 2m/s/s. What is the force on the wagon?
Answer:
200N
Explanation:
Given parameters:
Mass of wagon = 100kg
Acceleration = 2m/s²
Unknown:
Force on the wagon = ?
Solution:
From Newton's second law of motion:
Force = mass x acceleration
Now insert the parameters and solve;
Force = 100 x 2 = 200N
PLEASE HURRY What is "a section of a chromosome that typically contains the code for a particular protein, which determines a specific trait" called?
heterozygous
genetics
species
gene
Answer:
It is a gene!!
Explanation:
It is because RNA is referred to as a gene. Genes are contained in chromosones.
identfy the parts of he atom that are labeied in the
dagram
Label A:
Label B
NEED THE ANSWE ASAP!
Answer :
Label A - nucleus.
Label B- electron cloud.
Explanation :
An atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.
The protons and the neutrons are located inside the nucleus or the center of the nucleus where the mass of the an atom is concentrated.
The electrons are located around the nucleus.
The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.
In the picture, label A shows the nucleus.
Electrons has the ability to revolve around the nucleus in a fixed circular orbit. Electron cloud represents the spreading of the electrons energy.
In the picture, label B shows the electron cloud.
Hence, the label A - nucleus and label B- electron cloud.
Required
Which of these is called a meteor? *
1: a chunk of metallic or stony matter found in space
2: a chunk of metallic or stony matter found on Earth's surface
3: a streak of light caused by something entering Earth's atmosphere
What is the answer?
Answer:
lk
Explanation:
2
Select the correct answer.
What happens when a negatively charged object A is brought near a neutral object B?
OA. Object B gets a negative charge.
OB. Object B gets a positive charge.
OC. Object B stays neutral but becomes polarized.
OD. Object A gets a positive charge.
O E.Object A loses all its charge.
Answer:
Option C.
Polarization takes place!
why is g called the universal gravitational constant
Explanation:
Hey there!
Universal gravitation constant (g) is the force of gravitation produced between two bodies of unit mass each separated by unit distance between their centers. The value of universal gravitation constant (g) is 6.67 Nm²/kg², which is constant all over the world. So, that's why it is called universal gravitation constant.
Hope it helps....
What is always true about the light ray that emerges from the right side of the lens?
what happens when two forces at same direction
Answer:
Explanation:
· If two forces are in the same direction, then one adds them to find the net force, which is the vector sum of these forces. However, when two forces act in opposite direction, one has to subtract the lesser force from the larger one to find the resulting force. The resultant is the direction of the larger of these two forces.
Select the correct answer.
Which diagram represents an object in equilibrium?
ОА.
applied
force = 20 N
force due to
friction = 15 N
OB.
applied
force = 20 N
force due to
friction = 20 N
OC.
applied
force = 15 N
force due to
friction = 25 N
OD.
applied
force = 30 N
force due to
friction = 20 N
ОЕ.
applied
force = 30 N
force due to
friction = 15 N
Reset
Next
My
Answer:
B
Explanation:
The force and friction cancel each other.
20N - 20N = 0N acting on the object.
Jeff uses a solar cell to run a small motor. What energy transformation occurred?
(A) Light to electric to potential
(B) Light to electric to kinetic
(C) Electric to solar to kinetic
(D) Kinetic to electric to mechanical
Please help as fast you can
Answer:
d a
Explanation:
A source charge generates an electric field of 1236 N/C at a distance of 4 m. What is the magnitude of the source charge?
A. 2.2 ɥC
B. 680 ɥC
C. 2.2 C
D. 680 C
can someone explain this in detail because im having a hard time understanding these type questions...thank you!!
Answer:
A. 2.2 ɥC
Explanation:
Given;
electric field strength, E = 1236 N/C
distance of the source charge, r = 4 m
Electric field strength is calculated as;
[tex]E = \frac{kQ}{r^2}[/tex]
where;
Q is the magnitude of the source charge
k is Coulomb's constant = 9 x 10⁹ Nm²/C²
[tex]E = \frac{kQ}{r^2} \\\\kQ = Er^2\\\\Q = \frac{Er^2}{k} \\\\Q = \frac{(1236)(4^2)}{9 \ \times \ 10^9} \\\\Q = 2.197 \ \times \ 10^{-6} \ C\\\\Q = 2.197 \ \mu \ C[/tex]
Therefore, the correct option is A. 2.2 ɥC
You serve a volleyball with a mass of 1.4 kg. The ball leaves with a speed of 13 m/s. Calculate KE
Answer:
118.3 J
Explanation:
Givens:
m = 1.4 kg
V = 13 m/s
Formula for kinetic energy:
KE = (1/2)*(m)*(v)^2
KE = .5*(1.4 kg)*(13 m/s)^2
KE 118.3 J
J = Joules
Dexter Eius is running through the cafeteria when he slips on some mashed potatoes and falls to the floor. (Let that be a lesson for Dexter.) Dexter lands in a puddle of milk and skids to a stop with an acceleration of -4.8 m/s/s. Dexter weighs 780 Newtons. Determine the coefficient of friction between Dexter and the milky floor.
Answer:
μ = 0.49
Explanation:
For this exercise we can use Newton's second law
Y Axis
N - W = 0
N = W = mg
X axis
-fr = ma
the equation for the friction force is
fr = μ N
we substitute
-μ m g = ma
μ = -a / g
we calculate
μ = 4.8 / 9.8
μ = 0.49
Can the distance coverd by a body ever be negative? What about its distance and displacement
answer in photo enjoy
A 15 kg block is sliding along a frictionless surface and strikes a 10 kg ball at rest. What is the collision of the blocks after the collision if it is an inelastic collision?
Answer:
v = 0.6 v₁
Explanation:
This is an exercise in collisions, let's start by defining a system formed by the two bodies, so that the forces during the collisions have been internal and the momentum is preserved.
Instant starts. Before the crash
p₀ = M v₁ + m 0
Final moment. After the crash
[tex]p_{f}[/tex] = (M + m) v
how momentum is conserved
p₀ = p_{f}
M v₁ = (M + m) v
v = [tex]\frac{M}{M+m} v_{1}[/tex]
let's calculate
v = [tex]\frac{15}{15+10} v_{1}[/tex]
v = 0.6 v₁
