Answer:
pitched sound
Explanation:
The shrillness of sound is known as Pitched Sound
Please mark me as brilliant
plz plz plz
Answer:
pitch
Explanation:
What is the purpose of chloroplasts, and why do you think it is missing from the root hair cell?
Explanation:
Mitochondria are essential parts of many eukaryotes, but they are useless without oxygen. Therefore, chloroplasts are extremely important. They produce breathable air for life. Root hairs are seen to not have chloroplasts as their job is to collect water and nutrients.
BRAINILIEST PLEASEIf the current in a wire which is placed perpendicular to a magnetic field increases the force on the wire
Answer:
The force on the wire increases
Explanation:
Since the force on the wire F = BILsinФ where B = magnetic field strength, I = current in wire, L= length of wire and Ф = angle between the magnetic field and the wire.
Given that the magnetic field and the wire are perpendicular, Ф = 90°
So, F = BILsin90° = BIL
Since B and L are constant, F ∝ I
So, if the current in the wire increases, the force on the wire also increases.
What is potential energy?
Answer:
energy that is stagnant and cannot be changed
Answer:
Potential energy is a form of mechanical energy in which an object is at rest or it's not moving
science help please in le photo...........
can you please help me with this lab.
Answer: I really don’t know
Explanation:
HELPPPP PLSSS I NEED HELP
Answer:
D. Pearl Harbor
Explanation:
Question 4
1 pts
If you have a voltage of 120 volts entering your house and a light bulb with
0.625 amperes flowing through it, how many watts is your light bulb?
A. 50 watts
B. 150 watts
C. 25 watts
D. 75 watts
Answer:
D. 75 watts
Explanation:
brainliest please? i've just answered 3 of your questions and they were all correct! :) i hope i helped!
Answer:
(D) =75 WATTS
Explanation:
p(power)=i(current)×v(voltage)
p = 0.625 × 120
p =75 watts
An object with a mass of 10 kg is accelerated upward at 2 m/sec2. What force is required?
Answer:
Answer: Given m = 10 kg and . F = 20 N. Thus, the force required to accelerate the object upward direction is 20 N.
Explanation:
Answer: Given m = 10 kg and . F = 20 N. Thus, the force required to accelerate the object upward direction is 20 N.
is wooden blocks transparent,translucent or opaque
Answer:
opaque
Explanation:
Materials such as wood, stone, and metals are opaque to visible light.
Which of the following forces can change the motion of an object? A. push B. shove C. pull D. all of these
Answer: The answer is D all of these sorry if i am wrong
Explanation:
You are adding sugar to a cup of tea. What could you do to make the sugar dissolve
faster? (Select all that apply)
Stir/agitate
Heat the tea
Break the sugar into smaller parts
Keep adding more sugar
Answer:
Stir/agitate and heat the tea
Answer:
Stir the tea, Heat the tea, and Grind the sugar
Explanation:
Heating and stirring both increase the energy of the tea molecules, which increases interactions with the sugar. Grinding sugar allows more sugar molecules to be exposed to the solvent particles that dissolve them.
Why do we need satellites?
(There is no science colum)
Answer:
Because they provide information about clouds, oceans, land and ice.
How is a plant able to cycle matter through the processes of cellular respiration and photosynthesis?
The carbon cycle refers to the processes by which carbon in the biosphere is recycled. Photosynthesis sucks carbon dioxide out of the atmosphere, while cellular respiration releases it into the environment. Photosynthesis is the process by which solar energy reaches a plant and is converted into glucose.
How photosynthesis and cellular respiration are similar:
Photosynthesis is a method by which plants and other organisms transform light energy into chemical energy, which is then released to fuel the organism's metabolic activities through cellular respiration.
Of the following metals, which one is the BEST conductor of electricity?
Iron
Steel
Aluminum
Silver
Silver
Take a look at the chart attached for most conductive
a measuring cylinder contains water when put rock level rises what is volume of rock
Answer:
The volume displacement resulting from the action, minus the original volume.
how much force is required to accelerate a 50 kg mass at 2 m/s
Answer:
F = 100 Newtons
Explanation:
F = ma
F = (50 kg)(2 m/s)
F = 100 kg*m/s
If a balloon has 12 electrons on its surface but also 13 protons, what
is the net charge on the balloon?
Answer:
q = 1
Explanation:
Given that,
No. of electrons = -12
No. of protons = 13
We need to find the net charge on the balloon. We know that net charge is equal to the sum of proton and the electrons such that,
Net charge = No. of electrons + no. of protons
= -12 + 13
= 1
So, the net charge is equal to 1.
if when the sun comes out a road expands more than the dirt it is on it means
Answer:
the road has a larger coefficient of linear expansion than the dirt
A 1.50 kg cart moves in a circular path of 1.30 m radius at a constant speed of 2.00 m/s. (a) Calculate the magnitude of the centripetal acceleration of the cart.
(b) Calculate the magnitude of the centripetal force on the cart.
(c) Calculate the coefficient of friction between the tires and the ground
(d) Describe the direction of the centripetal force.
Answer:
the answer is 1500 because of the internet
Which is an example of the cycling of matter from one sphere to another?
A a puddle of water evaporating and rising into the atmosphere
B animals obtaining energy from plants
C heat energy from the sun warming the land
D heat energy from the sun warming the oceans
Which energy change is caused by an endothermic chemical reaction?
A. An increase in temperature
B. Absorption of thermal energy
C. Release of light
D. Production of thermal energy
The energy change caused by an endothermic chemical reaction is the absorption of thermal energy. So, option B.
What is meant by endothermic reaction ?Endothermic reactions are defined as, those reactions in which the reactants take in heat energy from the environment to create products.
Here,
The endothermic reactions lower the temperature of their surrounding area, thereby creating a cooling effect.
When bonds in the reactants are broken, more energy is absorbed than is released when new bonds are generated in the products. This is known as an endothermic reaction.
A drop in the temperature of the reaction mixture is a characteristic of endothermic reactions.
In endothermic reactions, the enthalpy of the products of the reaction is greater than that of the reactants. Energy is absorbed from the surroundings.
Hence,
The energy change caused by an endothermic chemical reaction is the absorption of thermal energy.
To learn more about endothermic reactions, click:
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How much kinetic energy does a 2 kg ball have if it is going 5 m/s ?
Explanation:
mass(m)=2 kg
velocity(v)=5m/s
Now,
Kinetic energy(K.E.)=1/2mvsq
=1/2×2×5sq
=25
where,sq=square(2)
A hockey puck slides with a constant velocity across a frictionless ice surface. In one paragraph, using your own words, describe the net force on the hockey puck and the observation which allowed you to draw that conclusion.
Answer:
The net force on the hockey puck is zero because it's acceleration is zero due to constant velocity.
The hockey will remain in it's uniform motion unless compelled by an external force.
Explanation:
[tex]from \: vector \: mechanics \\ a = \frac{dv}{dt} \\ but \: at \: constant \: velocity \\ \frac{dv}{dt} = 0 \\ hence : \: \: a = \frac{0}{dt} \\ a = 0[/tex]
A motorbike accellerates from 15m/s to 25m/s in 15 seconds. How far does thew motrobike trsavel in this time?
Answer:
300 m.
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 15 m/s
Final velocity (v) = 25 m/s
Time (t) = 15 secs
Distance (s) =?
The distance travelled by the motorbike can be obtained as follow:
s = (u + v)t / 2
s = (15 + 25) × 15 / 2
s = 40 × 15 / 2
s = 600 / 2
s = 300 m
Thus, the distance travelled by the motorbike is 300 m.
A positive charge moving with a constant velocity v enters a region
of a uniform magnetic field pointing to the top of the page. What
is the direction of the magnetic force on the charge?
A. Left.
B. Right.
C. To the bottom of the page.
D. To the t&p of the page.
E. There is no magnetic force on the charge.
There are some ways objects in motion are affected. _______________, or pushes and pulls, affect the motion of an object. _______________ is a force that pulls objects down to Earth. _______________ is a force that slows things down or can even make them stop. Did you know acceleration means more than the increase of an object’s speed? It also describes an object that is slowing down or changing _______________. Since acceleration is a change in speed or direction, that means, _______________ is a change in velocity
Answer:
Forces, Gravity, Friction, Direction, Acceleration.
The answers for the fill-in-the-blanks would be Force, gravity friction
direction and acceleration respectively.
What is gravity?It can be defined as the force by which a body attracts another body towards its center as the result of the gravitational pull of one body and another,
There are a few ways that moving objects are impacted. Pushes and pulls, or force, have an impact on how an object moves.
The force of gravity drags items toward the Earth.
Friction is a force that causes objects to move more slowly or even come to a stop.
It also applies to an item that is reversing course or slowing down. Since acceleration is a change in velocity, it can also be a change in speed or direction.
Thus, Force, gravity friction direction, and acceleration are the answers respectively.
Learn more about gravity from here,
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The _____ of a mechanical wave is a direct measure of its energy.
speed
frequency
amplitude
hertz
Calculate the weight(W) of a 40 Kg bowling ball?
W = m(Kg) x g (9.8 m/s2)
Answer:
392 N
Explanation:
Mass of the ball=40kg
g=9.8m/s^2
Weight(w)=40×9.8
=392N
What are two ways you can increase power by climbing the stairs?
Answer:
change the
timedistance force.Explanation:
P = W/time
W = F*d
You have control over how fast you go up the stairs.
You also have control over how far up the stairs you go.
Therefore the answer is
timedistanceIf you don't like distance as an answer, you can carry something up the stairs -- anything that increases F will do.
Imagine that you drop a shot put from a tower on the moon. How much
will the drop time change if the shot put is dropped from a tower on the
earth that is four times as high as the tower used on the moon? The
acceleration of gravity on earth is about 6 times the acceleration due to
gravity on the moon. An equation that may be of interest is found in the
image below.
y = yo + Vyot + ayt?
Answer: y = yo + Vyot + ayt = =2ay y− yo . 5. vy. 2. −voy. 2. =−2 g y− yo
Explanation: since both the displacement and acceleration are negative, they cancel each other when divided, so the result is positive. ... As you can see, as the height displacement (height) increases, the longer it takes for the robocopter to fall.