Answer:
D. None of the the statements above are correct.
Explanation:
Microscopes and telescopes are major instruments that have contributed hugely to our current understanding of the micro- and macroscopic worlds. The invention of these devices led to numerous discoveries in disciplines such as physics, astronomy, and biology, to name a few. In this section, we explain the basic physics that make these instruments work.
Answer:
d. is the answer hope it helps
The amplitude of wave is
A) the distance the wave moves in one second
B) the distance between one crest and the next crest
C) half the distance from a crest to a trough
D) the distance equal to one wavelength
Answer:
A
Explanation:
what more to say.. :| it's the distance from x to a crest or trough
Answer:
The answer is A
Explanation:
The amplitude of wave is the distance the wave moves in one second
A net force of 15 N is applied to a cart with a mass of 2.1 kg. What is the acceleration of the cart?
PLEASE I NEED HELPPPPPP 20 POINTSSSS
Answer:
d
Explanation:
Fnet=m*a
algebra to rework = a = Fnet/m
so the force of the hand is divided by the mass of the object
Use the formula given below to calculate the force advantage of the crow-bar (lever) in the picture.
FA = Leffort / Llifting
Select one:
a. 60
b. 32
c. 15
d. 2
Answer:
c.15
FA = Leffort / Llifting
[tex] \frac{30}{2} [/tex]
=15
A stone is thrown upwards at 20m/s what is it Speed in 2s
Answer:
40
as it goes up 2second
20+20=40
The Sun produces 9.5 x 10^38 He atoms every second. Calculate the amount of energy produced by
the Sun each second.
Answer:
You need to look up the figure for the energy released in the formation of one He atom, and then multiply that by the number of He atoms formed each second, and the result will be the total energy release that you seek.
Explanation:
If a person runs 720m/minute for 15 minutes, how far will the person run?
Answer:
10800
Explanation:
if someone runs 720 miles every minutes they will run 10,800 miles in 15 minutes
It is dangerous to move towards the top of the branches of a tree why
[tex] \tt \: SOLUTION \leadsto[/tex]
It is dangerous to move towards the top of the branches of a tree because The exposed wood tissues begin to decay or either are too dilute. Due to which the branch can break and we can fall Down.
Answer:
Explanation:
It is dangerous to move towards the top of a tree because as we will move towards the top the branch gets thinner and thinner and we can fall down because of the breaking of the branch.
Light can escape a black hole eventually. Question 1 options: True False.
Answer:
False
Explanation: not even light can escape through the event horizon from the black hole. At its center, each black hole is thought to have a singularity, a point of infinite density, and zero volume.
A ball is launched at 5.5 m/s at 76 degrees above the horizontal. It starts and lands at the same distance from the ground. What are the maximum height above its launch level and the flight time of the ball?
The maximum height of the ball if A ball is launched at 5.5 m/s at 76 degrees above the horizontal is 1.45 meters.
What is distance?Distance, regardless of the direction of the travel, is the entire path that an object in motion has taken. Since the direction of motion is ignored while measuring distance, it is referred to as a scalar quantity. There is only one possible value for the distance: positive.
Given:
A ball is launched at 5.5 m/s at 76 degrees above the horizontal, It starts and lands at the same distance from the ground,
Calculate the maximum height as shown below,
Maximum height = [tex]v^2sin^2a / 2g[/tex]
Maximum height = 5.5² × sin²76° / 2 × 9.8
Maximum height = 30.25 × 0.97² / 19.6
Maximum height = 30.25 × 0.9409 / 19.6
Maximum height = 28.46 / 19.6
Maximum height = 1.45 m
Thus, the maximum height is 1.45 meters.
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Pls help I have to turn this in soon
If toner particles in a laser printer have a negative charge, then what charge do you think the surface of the paper in the printer has? How do you know?
Answer:
Explanation:
As it moves along, the paper is given a strong negative electrical charge by another corona wire. When the paper moves near the drum, its negative charge attracts the positively charged toner particles away from the drum.
The surface of the paper in the printer has a negative charge.
What is a laser printer?A laser printer is a common form of computer printer that uses quasi photocopier technology. A color laser printer is up to ten times more costly than a monochrome laser printer.
The steps in which the laser printer work is;
1. When a document is transmitted to the printer, a laser beam uses electrical charges to "draw" the document on a selenium-coated drum.
2. After the drum has been charged, it is rolled in toner, a sort of dry powder ink. The charged picture on the drum is adhered to by the toner.
3. The toner is applied to a piece of paper and fused to it using heat and pressure.
4. After the document has been printed, the electrical charge on the drum is released and the surplus toner is collected.
Hence the surface of the paper in the printer has a negative charge
To learn more about the laser printer refer to the link;
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Four people return home from work and walk up the stairs to their own apartments
in the same building. Which person has gained the most gravitational potential
energy upon arriving at the door of their apartment?
A 50kg person who lives on the second floor
A 50kg person who lives on the third floor
A 100kg person who lives on the second floor
A 100kg person who lives on the third floor
Answer:
A 100 kg person who lives on the third floor
Explanation:
its ^ the answer above
The location of the earth in the milky way galaxy is.
Answer:
local group
Explanation:
Earth is in the second largest galaxy of the Local Group - a galaxy called the Milky Way. The Milky Way is a large spiral galaxy. Earth is located in one of the spiral arms of the Milky Way (called the Orion Arm) which lies about two-thirds of the way out from the center of the Galaxy.
Please mark as Brain list.
The location of the earth in the milky way galaxy is local group.
What is milky way?Milky way is the largest galaxy in the universe. It consists of large group of stars along with interstellar gases, dust, or dark matter.
Earth is occupying the second largest place in galaxy of the Local Group. Earth is one of the spiral arms of the Milky Way.
Thus, location of the earth in the milky way galaxy is local group.
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A 6 gram ball is held 5 meters from the ground.calculate
Answer:
0.3J
Explanation:
pe = mgh = 0.006 x 10 x 5 = 0.3j
PLEASE HELP ME ANSWER THIS QUESTION!!!
Answer:
1. as initial speed is 0 and acceleration is g=9.8 m/s^2 velocity at any time
2. 15m
3. gravity and force
4. the flower pot would break from impact
Explanation:
Using the clues in the photo and reading the questions this should be the best answer. Good Luck!
1. The term that describes where the supply curve intersects the demand curve is known as
O price floor
price ceiling
surplus.
equilibrium
PLEASE HELP!!!!!
Isaac Newton discovered the three laws of motion. Which example BEST illustrates Newton's third law of motion, which describes action and reaction forces?
A. a rocket takes off the ground
B. a book slides forward on a seat when the car stops
C. a heavier ball falls at the same speed as the lighter ball
D. a vehicle rounds a curve and changes its acceleration
Answer:
The answer is A
Explanation:
When a rockets thrusters push on the ground the ground pushes back on the rocket with equal force in the opposite direction. Hence the rocket takes off.
Newtons third law of motion states, for every action there is an equal and opposite reaction.
1. What net force is required to accelerate a car at a rate of 2 m/s2 if the car has a mass of 3,000 kg?
F=______
m=______
a= ______
Answer:
Net force required to accelerate the car is 6000 N
Explanation:
Force is calculated by the equation, F = Mass × Acceleration
This is based on Newton's Second Law of Motion which states that the force acting on an object is its mass times the acceleration of the object.
Here, mass = 3000 kg and acceleration = 2 m/s²
⇒ Force = Mass × Acceleration
= 3000 × 2 = 6000 N
⇒ F = 6000 N
⇒ M = 3000 kg
⇒ a = 2 m/s²
A rod 7.0 m long is pivoted at a point 2.0 m from the left end. A downward force of 50 N acts at the left end, and a downward force of 200 N acts at the right end. At what distance to the right of the pivot can a third force of 300 N acting upward be placed to produce rotational equilibrium?
If the rod is in rotational equilibrium, then the net torques acting on it is zero:
∑ τ = 0
Let's give the system a counterclockwise orientation, so that forces that would cause the rod to rotate counterclockwise act in the positive direction. Compute the magnitudes of each torque:
• at the left end,
τ = + (50 N) (2.0 m) = 100 N•m
• at the right end,
τ = - (200 N) (5.0 m) = - 1000 N•m
• at a point a distance d to the right of the pivot point,
τ = + (300 N) d
Then
∑ τ = 100 N•m - 1000 N•m + (300 N) d = 0
⇒ (300 N) d = 1100 N•m
⇒ d ≈ 3.7 m
[HELPPPPP HELP ME HELP ] Current carrying conductor AB is placed in a magnetic field shown below. If the conductor AB moves away from the magnet, what will be the direction of the current in the conductor?
Answer:
B is directed from N to S (upwards at the open end)
Let the magnet be oriented with the open end at the north
F = q * v X B
A positive charge would be deflected towards the East using v X B
This is the direction of the "conventional" current which is B to A
Actual charges flow from A to B but the sign of the charge is -q
How do microwaves help heat frozen food?
A.
The waves filter ice from food
B. The waves block coldness in food.
C. The waves block coldness in food.
D. The waves are absorbed by water in food. I’m
You look at a rope coiled on a beach and are able to perceive it as a single strand because of the law of.
You are able to perceive it as a single strand because of the principle of : Good continuation
Principle of good continuationPrinciple of Good continuation states that objects with very smooth edges are easily seen as been continuous ( i.e as a single strand ) rather than objects or materials with rough edges.
The rope coiled on a beach has very smooth edges therefore can be seen as a continuous strand and this is possible due to the principle of good continuation.
Hence we can conclude that You are able to perceive it as a single strand because of the principle of : Good continuation.
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Frosted glass is an example of which type of material?
Answer:
it is an example of a translucent object
A charge is divided q1 and (q-q1)what will be the ratio of q/q1 so that force between the two parts placed at a given distance is maximum?
Answer:
[tex]q / q_{1} = 2[/tex], assuming that [tex]q_{1}[/tex] and [tex](q - q_{1})[/tex] are point charges.
Explanation:
Let [tex]k[/tex] denote the coulomb constant. Let [tex]r[/tex] denote the distance between the two point charges. In this question, neither [tex]k[/tex] and [tex]r[/tex] depend on the value of [tex]q_{1}[/tex].
By Coulomb's Law, the magnitude of electrostatic force between [tex]q_{1}[/tex] and [tex](q - q_{1})[/tex] would be:
[tex]\begin{aligned}F &= \frac{k\, q_{1}\, (q - q_{1})}{r^{2}} \\ &= \frac{k}{r^{2}}\, (q\, q_{1} - {q_{1}}^{2})\end{aligned}[/tex].
Find the first and second derivative of [tex]F[/tex] with respect to [tex]q_{1}[/tex]. (Note that [tex]0 < q_{1} < q[/tex].)
First derivative:
[tex]\begin{aligned}\frac{d}{d q_{1}}[F] &= \frac{d}{d q_{1}} \left[\frac{k}{r^{2}}\, (q\, q_{1} - {q_{1}}^{2})\right] \\ &= \frac{k}{r^{2}}\, \left[\frac{d}{d q_{1}} [q\, q_{1}] - \frac{d}{d q_{1}}[{q_{1}}^{2}]\right]\\ &= \frac{k}{r^{2}}\, (q - 2\, q_{1})\end{aligned}[/tex].
Second derivative:
[tex]\begin{aligned}\frac{d^{2}}{{d q_{1}}^{2}}[F] &= \frac{d}{d q_{1}} \left[\frac{k}{r^{2}}\, (q - 2\, q_{1})\right] \\ &= \frac{(-2)\, k}{r^{2}}\end{aligned}[/tex].
The value of the coulomb constant [tex]k[/tex] is greater than [tex]0[/tex]. Thus, the value of the second derivative of [tex]F[/tex] with respect to [tex]q_{1}[/tex] would be negative for all real [tex]r[/tex]. [tex]F\![/tex] would be convex over all [tex]q_{1}[/tex].
By the convexity of [tex]\! F[/tex] with respect to [tex]\! q_{1} \![/tex], there would be a unique [tex]q_{1}[/tex] that globally maximizes [tex]F[/tex]. The first derivative of [tex]F\![/tex] with respect to [tex]q_{1}\![/tex] should be [tex]0[/tex] for that particular [tex]\! q_{1}[/tex]. In other words:
[tex]\displaystyle \frac{k}{r^{2}}\, (q - 2\, q_{1}) = 0[/tex].
[tex]2\, q_{1} = q[/tex].
[tex]q_{1} = q / 2[/tex].
In other words, the force between the two point charges would be maximized when the charge is evenly split:
[tex]\begin{aligned} \frac{q}{q_{1}} &= \frac{q}{q / 2} = 2\end{aligned}[/tex].
SKILL LEVEL:
Proficient
The Doppler effect is a change in the
of sound
waves that occurs wipen the source of the sound waves is
moving relative to a stationary listener.
Check it
2 SCRATCHPAD
^ Improve this question
Answer:
The Doppler effect is a change in the frequency of sound waves that occurs when the source of the sound waves is moving relative to a stationary listener. Sound waves that are closer together have a higher frequency, and sound waves that are farther apart have a lower frequency.
Explanation:
hope it helps you
what are the two factors that affect the force of gravitation?
Answer:
important – mass, and distance.
A 2 kg ball is dropped from a height of 60 m. Find its speed just before it hits the ground. Assume no friction. Answer
Answer:
-34.3m/s
Explanation:
first lets find the time befor it hit the ground by using free fall equation and we know we use that in one condition which is a constant acceleration in this case its a gravitational acceleration which is -9.8
[tex]h = \frac{1}{2} g {t}^{2} [/tex]
[tex]t = \sqrt{ \frac{2 \times 60}{9.8 } } = 3.5s[/tex]
now we know that the initial velocity its zero :
so applu the another kinematic equation which is
[tex]v = u - gt[/tex]
v is final velocity and u is the initial velocity and its equal zero.
v = - 9.8 × 3.5 = - 34.3
[tex]\huge\sf\red{A}\pink{N}\orange{S}\green{W}\blue{E}\gray{R}[/tex]
Given,
mass of the ball, m=2 kg ;
height of the ball, h=60 m
The initial potential energy of the ball,
[tex]{\boxed{\underline{\sf{E_{p}=m g h=(2)(10)(60)=1200 \mathrm{~J}}}}[/tex]
When the ball reaches the ground, its potential energy becomes zero as it is entirely converted into its kinetic energy ( [tex]{\sf{E_{K}[/tex] ), i.e.,
[tex]{\Rightarrow{\sf{E}_{\sf{k}}=1200 \mathrm{~J}}}[/tex]
If v is the velocity attained by the ball just before reaching the ground,
[tex]{\Rightarrow{\sf{E}_{\sf{k}}=\frac{1}{2}{mv}^{2}}}}[/tex]
[tex]{\sf\Rightarrow{v=\sqrt{\frac{2 \sf{E}_{\sf{k}}}{\sf{m}}}=\sqrt{\frac{2 \times 1200}{2}}}[/tex]
[tex]{\Large{\mid{\underline{\overline{\Rightarrow{\sf{34.64\:m/s}}}}\:{\mid}[/tex]
What is the wavelength of the sound you hear as a train
blowing its whistle is coming towards you?
a
The wavelength is shorter than the sound of the
whistle at rest
b You will not hear anything
С
There is not enough information to answer this
question
d
The wavelength is longer than the sound of the
whistle at rest
e
The wavelength is the same as the sound of the
whistle at rest
As the train blows its whistle towards you, the wavelength is shorter than the sound of the whistle at rest.
What is wavelength?Wavelength is the distance traveled by a wave in a given period of time.
Relationship between wavelength, speed and frequency of sound
v = fλ
where;
v is the speed of the soundf is the frequency of the soundλ is the wavelength of the soundAs the frequency of the sound increases, the wavelength of the sound decreases.
Thus, as the train blows its whistle towards you, the wavelength is shorter than the sound of the whistle at rest.
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what is the impulse applied to the block
Answer:
i do not know can i get brainliest im broke
Explanation: