Answer:
s ≈ 35.8 m
Explanation:
Let's apply the uniform acceleration equation to find the vertical height travelled after 2.7 seconds.
[tex]s = ut + \frac{1}{2}at^2[/tex]
s = distance travelled
u = initial vertical velocity
t = time taken
a = gravitational acceleration
The gun is fired horizontally, hence there is no initial vertical velocity.
[tex]s = 0(2.7) + \frac{1}{2}(9.81)(2.7)^2[/tex]
[tex]s = 35.75745 m[/tex]
s ≈ 35.8 m
Point B on a wheel of radius 40 cm that is rotating at a constant 5.0 revolutions
per second is located 0.20 m from the axis of rotation. Pont A is just at the border
of the wheel. See the figure.
a) What is the angular velocity of the wheel in rad/s?
b) What point has a greater linear speed, A or B? Calculate both speeds and
compare the results.
c) What are the centripetal accelerations of points A and B due to the spin of the
wheel? Sketch the situation and represent the vectors linear velocity and
centripetal acceleration in points A and B. Assume the rotation of the wheel
to be clockwise.
(a) The angular velocity of the wheel is 31.42 rad/s.
(b) The linear speed of the wheel at point A is greater than point B.
(c) The centripetal accelerations of points A is 394.89 m/s² and point B is 197.44 m/s².
Angular velocity of the wheel
The angular velocity of the wheel is calculated as follows;
ω = 2π (5) = 31.42 rad/s
Linear speed of the wheel at point Av = ωr
v = 31.42 x 0.4
v = 12.57 m/s
Linear speed of the wheel at point Bv = ωr
v = 31.42 x 0.2
v = 6.28 m/s
Thus, the linear speed of the wheel at point A is greater than point B.
Centripetal acceleration at point Aa = ω²r
a = (31.42)² x 0.4
a = 394.89 m/s²
Centripetal acceleration at point Ba = ω²r
a = (31.42)² x 0.2
a = 197.44 m/s²
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which of the following statements is/ are true?
Answer:
2
Explanation:
because if both of them collided they have the same momentum
A turtle moves at a speed of 1.0 km/h. How fast is the turtle
moving in meters per second (m/s)?
Answer:
0.28 m/s
Explanation:
1.0km/h * (1000m / 1km) * (1h / 3600s) =
The speed of the turtle in meters per second is 0.28.
What is unit conversion?Multiplication or division by a numerical factor, selection of the correct number of significant figures, and unit conversion are all steps in a multi-step procedure.
Speed is defined as the ratio of the time distance traveled by the body to the time taken by the body to cover the distance. The speed is a scalar quantity and does not require any direction to represent it.
Given that the speed of the turtle is 1.0 km/h. The speed in meters per hour will be calculated as below:-
To calculate the speed in meters per second multiply the number by 1000 and divide it by 3600.
1.0 km/h. = 1 x 1000 / ( 3600 )
1.0 km/h. = 1000 / ( 3600 )
1.0 km/h. = 0.28 meter second.
Therefore, the speed of the turtle in meters per second is 0.28.
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Please help me
Write what you think a wave is and list two types of waves
you have seen or heard about.
Answer:
Waves come in two kinds, longitudinal and transverse
Explanation:
hope it helps hehe
Mars has two moons that are most similar in character to ________. Earth's Moon comets small asteroids particles in the rings of Saturn
Answer:
Small asteroids
Explanation:
Mars has 2 moons, Phobos and Deimos, that each have characteristics similar to small asteroids.
The magnetic field 0.02 m from a wire is 0.1 t. what is the magnitude of the magnetic field 0.01 m from the same wire? 0.01 t 0.05 t 0.1 t 0.2 t
The magnitude of the magnetic field is 0.01 m from the same wire will be 0.2 T.It is the type of domain where the magnetic force is received.
What is a magnetic field?It is the type of field where the magnetic force is obtained. With the help of a magnetic field. The magnetic force is obtained it is the field felt around a moving electric charge.
The given data in the problem is;
r is the radius= 0.02 m
I is the current = 10,000A
x is the position considered = 0.002 m
The value of the electric current is found as;
[tex]\rm B= \frac{\mu_0 Ix }{2 \pi r} \\\\ \rm I= \frac{B \times 2\pi r}{\mu_0} \\\\ \rm I= \frac{0.1 \times 2\times 3.14 \times 0.02}{4 \pi \times 10^{-7}} \\\\ \rm I= 10,000 \ A[/tex]
The megnetic field through the wire will be;
[tex]\rm B= \frac{\mu_0 I}{2 \pi r} \\\\\rm B= \frac{4 \pi \times 10^{-7} \times 10,000}{2 \times 3.14 \times 0.01} \\\\ \rm B= 0.2 \ T[/tex]
Hence the value of the megnetic field will be 0.2 T.
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Answer:
D
Explanation:
why does a balloon bursts if too much of air is blown into it
Answer:
it is due to the elastic rubber and the air pressure builds up and the rubber expands
PLEASE ANSWER AS FAST AS POSSIBLE! what property is the same for all electromagnetic waves?
A. the length of each wave
B. the amount of energy each wave transmits
C. the speed of each wave
D. the number of waves that occur each second
Answer:
i believe the answer is C. the speed of each wave
Answer:
the speed of each wave
Explanation:
a p e x :))
what are the two properties of a vector?
Answer:
magnitude and direction
Want in own words please
What determines whether something is solid or liquid or gas
Answer:
An object could be determined as solid:
-It doesn't change shape easily.
-when lots of heat applied till melting point, it would melt or thaw (basically turn into liquid).
-turn to pieces or bent when enough force applied to it.
-the molecules attached with each other by strong forces, creating strong bonds.
An object could be determined as liquid:
-It changes shaped based on the container.
-when lots of heat applied till boiling point, it would vaporize
-the molecules have weak bonds, creating a lot of spaces.
-when heat extracted from the liquid till freezing point, it would freeze/hardened (turn into solid)
An object could be determined as gas:
-it doesn't have any shape or form.
-if fills in the container.
-if lots of heat applied, its molecules are going to move, vibrate,and transist faster; increasing pressure and volume.
-The molecules have very weak bonds, creating spacious space.
-when the heat are being extracted till certain freezing point, it is going to turn into liquid, then solid.
Which tools would Sara use to find an irregularly shaped object’s mass and volume?
a meter stick, a ruler, and water
a meter stick, a balance, and water
a balance, water, and a ruler
a balance, water, and a beaker
Answer:
D. a balance, water, and a beaker
Hope this helps!
Answer:
Explanation:
D. a balance, water, and a beaker
Which element is a noble gas?
Answer:
Elements that are noble gases are helium, argon, xenon, krypton, neon and radon.
A mountain climber has a mass (with all of their equipment) of 95, point, 0, k, g,95.0kg. If they were perfectly efficient, and ate 500, g,500g of chocolate (providing 11, point, 1, M, J,11.1MJ of chemical energy), how high could they climb?
Answer:
11900 meters
Explanation:
Use the Potential energy = mgh formula, substituting these in to get 11.1x10^6 = 95 x 9.81 x h.
Rearrange to make h the subject and the answer given is 11900 (3sig.fig.)
The maximum height to which he can climb will be 1.168 x 10⁴ meters.
What is potential energy?
The potential energy of a body is the energy of the body due it position. The potential energy always exist for two bodies which are in mutual interaction with each other for example by a force. For body a on earth, the potential energy of the body - earth system is -
E[P] = mgh
Given is a mountain climber that has a mass of 95 kg.
We can write -
Mass of climber = [M] = 95 kg
Energy gained by eating the chocolate = [E] = 11.1 MJ = 1.11 x 10⁷ joules
Assume that the height achieved achieve by the climber is [h] meters
Therefore, the potential energy gained at that height will be equal to 11 MJ
Therefore -
mgh = 1.11 x 10⁷
95 x 10 x h = 1.11 x 10⁷
95 x 10 x h = 1110 x 10⁴
h = (1110 x 10⁴)/950
h = 1.168 x 10⁴ meters
Therefore, the maximum height to which he can climb will be 1.168 x 10⁴ meters.
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Which is NOT a fossil fuel?
A)Coal
B)Oil
C)Wood
D)Natural gas
Answer:
wood because, Coal, oil and natural gas are examples of natural gas. Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen, usually consisting of certain quantities of methane and other constituents. therefore wood is not a fossil fuel
state and explain the structure of ear?
Answer:
The ear has external, middle, and inner portions. The outer ear is called the pinna and is made of ridged cartilage covered by skin. Sound funnels through the pinna into the external auditory canal, a short tube that ends at the eardrum (tympanic membrane).
The function of the outer ear is to collect sound waves and guide them to the tympanic membrane. The middle ear is a narrow air-filled cavity in the temporal bone. It is spanned by a chain of three tiny bones—the malleus (hammer), incus (anvil), and stapes (stirrup), collectively called the auditory ossicles.
Action and reaction forces are described by which of Newton's laws of motion?
first
second
third
fourth
Answer:
Newtons Third Law
Explanation:
Please give me brainliest much appreciated
Answer:
3rd
Explanation:
Physics. 40 points.
Help please :) (View attached image)
Answer:
1) 10 m/s 2) 14.1 m/s 3) 6.7 m 4) 11.25 m 5) 4.5 m/s 6) 12 joules
Explanation:
Need help with the second one!
This question is based on the movie “Interstellar”
Nah we don't need a new planet
Explanation:
will can still manage our planet
In a healthy body, the heart pumps blood efficiently. When the heart has a problem, heart failure can occur. Heart failure can happen on one side of the heart or on both sides. What would happen if a person had right-sided heart failure?
The heart would fail to receive oxygenated blood from the lungs.
The heart would fail to efficiently pump oxygenated blood to the body.
The heart would fail to efficiently pump blood to the lungs.
The heart wouldn’t be able to pump blood to or receive blood from the lungs or the body.
Answer:
the heart would fail to efficiently pump oxygenated blood to the body and lungs
Answer:
the heart is hard to pump
How are gravity and air resistance the same?
Answer:
because baconeggandcheese
Explanation:
peepa pug
Vocabulary
Define each term below and use it in a sentence. Then choose two additional terms from the movie.
there are 11 steps one should follow when shooting
true or false
(Archery)
Answer:
true
Explanation:
1. Stance
2. Nock
3. Set Draw Hand
4. Set Bow Hand
5. Pre-Draw
6. Draw
7. Anchor
8. Aim
9. Shot Set Up
10. Release
11. Follow-Through & Reflect
Is it possible for only one type of force to be present in a setup? How?
Yes, unless its not a main source.
what is the difference between sky and space?
Answer:
The sky is the region in which sunlight is scattered in the Earth's atmosphere,
while space is everything beyond that.
subtract 14/3 from 5
[tex]subtact14 \3 from5[/tex]
is the difference the point of origin and the point of destination?
Answer:
point of origin is the starting point while point of destination is the ending point
How are Neptune and Uranus allke?
Answer:
The methane gives Neptune the same blue color as Uranus.
Explanation:
Answer:
Uranus and Neptune are the two most distant planets in our solar system
Both are different from the larger gas giants Jupiter and Saturn, and from smaller rocky worlds like Earth
Uranus and Neptune have similar masses and internal compositions
Explanation:
During photosynthesis, plants transform the energy in sunlight into chemical
energy by converting molecules of carbon dioxide and water into sugar and
oxygen molecules. A scientist wants to share what she has learned about this
process. What are two reasons the scientist might use models to help
represent her findings?
A. The process is very complex.
B. Scientists need to replicate her experiments.
C. The molecules are too small to show the actual molecules in her
report.
D. Photosynthesis cannot be carried out in a laboratory
B and D
Explanation:
The scientists need to replicate her experiment and to do that you need actual sunlight,it can't be carried out in a laboratory
Hope this helped
What are nebulas, and how are they affected by gravity?.
gravity could slowly begin to pull together a bit of clumps of gas and dust but as the clumps get more big the gravity for them gets more and more stronger
Vector A has a magnitude of 27 m and
points in a direction 32° above the positive x axis. Vec-
tor B has a magnitude of 35 m and points in a direction
55° below the positive x axis. Sketch the vectors A, B,
and C = A + B. Estimate the magnitude and the
direction angle of from
your
sketch.
Answer:
The magnitude of the resultant is 55.0 m
The angle of resultant is 18.4° below the x axis
Explanation:
Given that,
Magnitude of vector A = 27 m
Angle = 32° above the x axis
Magnitude of vector B = 35 m
Angle = 35° blow the x axis
We need to calculate the angle between the vectors
Using given angle
[tex]\theta=32-(-55)[/tex]
ptex]\theta=87^{\circ}[/tex]
We need to calculate the sum of vector A and B
Using formula of sum of vector
[tex]C=\sqrt{A^2+B^2+2AB\cos\theta}[/tex]
Put the value into the formula
[tex]C=\sqrt{27^2+35^2+2\times27\times35\cos87}[/tex]
[tex]C=55.0\ m[/tex]
We need to calculate the direction angle
Using formula of angle
[tex]\tan\theta=\dfrac{B\sin\theta}{A+B\cos\theta}[/tex]
Put the value into the formula
[tex]\tan\theta=\dfrac{35\sin87}{27+35\cos87}[/tex]
[tex]\tan\theta=1.21[/tex]
[tex]\theta=\tan^{-1}(1.21)[/tex]
[tex]\theta=50.4[/tex]
We need to calculate the angle of the resultant vector makes with vector A
Using formula of angle
[tex]\phi=32-50.4[/tex]
[tex]\phi=-18.4^{\circ}[/tex]
Negative sign shows that the direction of resultant is below the x axis
Hence, The magnitude of the resultant is 55.0 m
The angle of resultant is 18.4° below the x axis
The magnitude of the sum of the vectors, C, can be obtained using the
parallelogram method.
The magnitude of the resultant vector, C, is approximately 45.3 meters.The direction of the resultant vector, C, is approximately 18.6° below the horizontal.Reasons:
The given parameters are;
Magnitude of vector A = 27 m
The direction of vector A = 32° above the horizontal
Magnitude of vector B = 35 m
The direction of vector B = 55° above the horizontal
By drawing, using the parallelogram resolution of vectors on MS Word, and
taking extension of the resultant in the x and y-direction, we have;
C = A + B = 42.92·i - 14.48·j
The magnitude of the resultant vector is therefore;
|C| = √((42.92 m)² + (14.48 m)²) ≈ 45.3 m
The direction is given as follows;
[tex]\theta = arctan \left(-\dfrac{14.48}{42.92} \right) \approx -18.6^{\circ}[/tex]
Verifying, we get;
Vector A = 27×cos(32°)·i + 27×sin(32°)·j ≈ 22.9·i + 14.31·j
Vector B = 35×cos(-55°)·i + 35×sin(-55°)·j ≈ 20·08·i - 28.67·j
C = A + B = ( 22.9·i + 14.31·j) + (20·08·i - 28.67·j) = 42.98·i - 14.36·j
Therefore, the vector obtained by sketch is correct approximately.
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