Answer:
tbh vector does not have any direction at all the answer is 0
I NEED ANSSWER IN THE NEXT 5 MINITES. OR NO BRAINLY REWARD.
a rock which has the mass of 25 kg is on a cliff 42 m high. Calculate the rocks potential energy. Given g = 10 m/s^2. NO FALSE ANSWERS ACCEPTED.
1,050 J
10,500 J
5,250 J
220,500 J
1050
Explanation:
you have to multiply 25kg time42m
Which of the objects have only potential energy?
Answer:
its all of the above.
Explanation:they all have potential energy but they get it in different ways.
Angelica has sprained her ankle and needs to stay off it for a few weeks, which is really frustrating because she is on the track team. She is worried that a prolonged period of inactivity will hurt her training. After about 10 days, she thinks that she can start working out gradually if she takes painkillers right before her workout. What is the BEST response to Angelica?
OPTIONS:
A.
She could really injure herself with this plan since she will not feel pain.
B.
Trying it once or twice and seeing how she feels is probably the best way to go.
C.
It is a common technique and lots of athletes practice injured so she will be fine.
D.
The damage from working out is probably less than the issue exercise will create.
PLEASE NO LINKS
Answer:
I think the answer is c
Explanation:
Because It is a common technique and lots of athletes practice injured so she will be fine.
By working on the given plan, Angelica can injure herself since she will not feel pain. The correct option is A.
What is ankle sprain?A sprain takes place when your ankle is compelled to move out of its regular place, causing one or more of the ligaments in your ankle to stretch, partially tear, or completely tear.
A sprained ankle can be caused by a fall that causes your ankle to twist. Landing on your foot awkwardly after jumping or pivoting.
You should avoid strenuous exercises, such as running, until the pain and swelling have subsided, but you should keep moving so that the muscles and ankle do not stiffen. Once your ankle is less painful, begin some gentle exercises.
As she is having ankle sprain, and she is planning to take pain killers and start to work out, this can cause her even more problem as she will not feel any pain.
Thus, the correct option is A.
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A person holds a bucket of weight 60N and climbs vertically the distance of 5m. What is the work done by gravity?
Answer:
300 J (Joules)
A Joule will measure "the amount of work done when a force of one newton is exerted through a distance of one meter"
Hope this Helps
Hey guys <3
I need some help with this performance task,, physics isn’t my strongest subject so help is much appreciated :)
(8/9 parts)
Answer:
8/9 parts
Explanation:
mark me as brainliest
Multiples of the fundamental frequency created by plucking a string very quickly, several times in a row is called__________.
a.
pitch
c.
scales
b.
overtones
d.
percussion
Answer:
overtones
Explanation:
object Travels 24 M with a speed of 4 metre per second and then another 32 with a speed of 8 metre per second the average speed of the object is
(a)6m/s (b)4m/s (c)5.6m/s (d)6.5m/s
Answer:
Total distance covered S=16+16=32 m
Total time t=4+2=6 s
Average speed V
avg
=
t
S
=
6
32
=5.33 m/s
If a plane travels 800 m south & 1500 m east, what is its distance &
displacement?
Answer:
2300 because 800 + 1500=2300
People who are exceptionally tall (like seven feet and over) often have a disorder that causes them to keep growing past the age most people do in their late teens. What gland would this disorder be associated with?
A.
adrenal
B.
thyroid
C.
pituitary
D.
pancreas
Answer:
C is the answer
Explanation:
The pituitary gland also known as the Master gland controls and regulates secretion of most hormones, when taller people usually grow past expected height this is normally due to the Pituitary gland not properly regulating and it secretes too many growth hormones causing "gigantism."
which of the following objects has no net force acting upon it
Answer:
D and object with constant velocity
A 1.35 kg block is pulled across a
flat, frictionless floor with a 3.07 N
force at 32.0° above horizontal.
What is the acceleration of the block?
Answer:
F=ma
3.07=1.35(a)
3.07/1.35 = a
a=2.27m/s^2
Explanation:
Since the question gives us both the force and mass of the object we can use the f= ma equation and just plug in both the force and mass and just solve for acceleration. I believe the degree listed in the question is just there to throw you off.
which of these animals is classified as an annelid.
STARFISH
MILLIPEDE
EARTHWORM
SNAIL
Answer:
earthworm is classified as an annelid
Answer:
earthworm
Explanation:
which scientist was the first one to use a telescope
Answer:
Galileo Galilei developed the first ever telescope
A cannon is fired with an initial horizontal velocity of 20 m/s and initial vertical velocity of 25 m/s. After 3s in the air, the canon hits it’s target. How far away(in meters) was the canon from its target? Answer:_____m
Answer:
60 m
Explanation:
After 3 seconds of travel at 20 m/s, the projectile is 3·20 = 60 meters horizontally from the cannon.
__
The vertical height after 3 seconds is 0.9 m, so the straight-line distance from cannon to target is √(60^2 +0.9^2) ≈ 60.007 meters.
An book fell from a shelf 1.5 meters from the ground. If it took the book 3 seconds to hit the ground, what was the velocity of the book?
The initial velocity of the book before its hits the ground is 14.2 m/s.
The given parameters;
height of the book above the ground, h = 1.5 mtime of motion of the book, t = 3 secondsThe initial velocity of the book is calculated as follows;
h = ut + ¹/₂gt²
where;
u is the velocity of the book1.5 = 3u + (0.5 x 9.8 x 3²)
1.5 = 3u + 44.1
3u = 1.5 - 44.1
3u = -42.6
[tex]u = \frac{-42.6}{3} \\\\u = -14.2 \ m/s\\\\u = 14.2 \ m/s \ downwards[/tex]
Thus, the initial velocity of the book before its hits the ground is 14.2 m/s.
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How is the diametre of a spherical body measured? Explain
Answer:
To measure diameter of a spherical body using Vernier Callipers.A small, movable auxiliary graduated scale attached parallel to a main graduated scale and calibrated to indicate fractional parts of the subdivisions of the larger scale.It is useful tool to measure spherical body.Diameter of a sphere=d = 2 * r , Surface area of a sphere: A = 4 * π * r² , Volume of a sphere: V = 4/3 * π * r³ , Surface to volume ratio of a sphere: A / V = 3 / r .
13 Henry Wadsworth Longfellow, John Greenleaf Whittier, Oliver Wendell Holmes, and James Russel Lowell were known as
Answer:
William Cullen Bryant, Henry Wadsworth Longfellow, John Greenleaf Whittier, Oliver Wendell Holmes, and James Russell Lowell. These five men made up a group of poets known as the Fireside Poets or the Schoolroom Poets.They were hugely popular in the second half of the 19th century, like the pop stars of their time.
Explanation:
hope this helps if not let me know
A steel projectile is shot horizontally at 54 m/s from the top of a 357 m tower. How far
from the base of the tower does the projectile hit the ground?
Hi there!
We can begin by solving for the time it takes the projectile to reach the ground.
Use the equation:
[tex]t = \sqrt{\frac{2h}{g}}[/tex]
Plug in the given height:
[tex]t = \sqrt{\frac{2(357)}{9.8}} = 8.536 s[/tex]
Use the equation:
d = vt, to solve for the horizontal distance:
d = (54)(8.536) = 460.944 m
Your car can brake with a deceleration of 6 m/s2. The car is initially going at 40 m/s.
a) How long will it take the car to come to a full stop?
b) If the car is 5 meters long, about how many car lengths should be kept between you and the car in front of you (assume the car in front of you comes to a stop immediately).
We have that for the Question "" it can be said that how long will it take the car to come to a full stop and the car lengths before a stop is
t=6.67L=27cars
From the question we are told
Your car can brake with a deceleration of 6 m/s2. The car is initially going at 40 m/s.
a) How long will it take the car to come to a full stop?
b) If the car is 5 meters long, about how many car lengths should be kept between you and the car in front of you (assume the car in front of you comes to a stop immediately).
Generally the equation for the Velocity is mathematically given as
[tex]v=u+at\\\\Therefore\\\\40=0+6t\\\\t=6.667s\\\\[/tex]
b)
s=ut+1/2at^2
Therefore
[tex]S=0+1/2(6)(6.7)^2\\\\S=134.67m[/tex]
Therefore
The car lengths before a stop is
L=134.67m/5
L=27cars
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What is final velocity
Answer:
Final velocity is the velocity which the body has at the end of the given time period.
l am so confused is it right?
Answer:
D
Explanation:
First,mg＞fv: It does a download acceleration,and the speed of the object increase.
Second,mg=fv: it hasn't a acceleration.
you can think the f is a constant.
What is the relationship between the temperature of a star and its luminosity?
A 1,336 kg car drives around a flat 199-m-diameter circular track at 22 m/s. What is the
magnitude of the net force on the car?
Hi there!
This is an example of Uniform Circular Motion, thus:
Net Force = Centripetal force
∑F = mv²/r
Plug in the given values. Remember to convert from diameter to radius, first.
d = 199m
r = d/2 = 199/2 = 99.5 m
∑F = 1336(22²)/99.5 = 6498.73 N
stephen schwartz created the musical godspell as well as __________.
Answer:
Stephen Lawrence Schwartz (born March 6, 1948) is an American musical theater lyricist and composer. In a career spanning over five decades, Schwartz has written such hit musicals as Godspell (1971), Pippin (1972), and Wicked (2003).
Explanation:
I have worked with so many writers who worry their
inconsistent memory is not sharp enough, exact enough, or
reliable enough for them to capture childhood moments with
any authority, and, of course, science had proven the fallibility
of memory time and time again.
O NO CHANGE
O has proven
O had proved
O proved
Help
Answer:
has proven had proved proved no change
Answer:
I believe it's the second option "has proven"
Explanation:
It just sounds like it fits better.
Sorry if it's wrong btw.
what is the initial velocity of an object thrown straight up that takes 5 seconds to reach its highest point?
Answer:
50 [m/s].
Explanation:
1) formula is: V-V₀=g*t, where V₀ - final velocity (it is 0), V - required initial velocity, g≈10 [m/s²] and t - elapsed time.
2) according to the formula above:
V=g*t; ⇒ V=5*10=50 [m/s].
In star wars, john williams used the __________ concept of romantic opera in which a character is assigned a short melody. so, famous characters like darth vader, princess leia, and han solo all have their own melody.
In Star Wars, John Williams used the Leitmotif concept of romantic opera in which a character is assigned a short melody.
It is used for famous characters like Darth Vader, Princess Leia, and Han Solo all have their melody.
Leitmotif is generally described as a recurring theme shown or appears over musical or literary composition.
Leitmotif is more common in operas and symphonic poems. It is attributed to a specific person, idea, or situation.
Hence, in this case, it is concluded that in the movie Star Wars, John Williams used the Leitmotif concept of romantic opera.
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If the activity of a source is 70 Bq after 2 years, and 35 Bq after 15 years. How long will be until the activity is 8.75 Bq?
Answer:
So if the half-life is two days, four half-lives is 8 days. Suppose a sample has a count rate of 3,200 Becquerel (Bq) at the start, then its count rate after 8 days would be 1/16th of 3,200 Bq = 200 Bq.
NEED HELP!!!! 10 POINTS!!!
When you feel short of breath, what is actually going on in your body?
A.
Your lungs are full to capacity.
B.
Your muscles are about to collapse.
C.
Your heart stops beating just for a second.
D.
Your body is not getting enough oxygen throughout.
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Which statement explains whether or not a person should use an experiment of a ball rolling down a hill as evidence that the force of gravity pulls objects straight down?(1 point) They should use it. Any experiment on Earth involving natural motion will provide direct evidence that gravity pulls objects straight down. They should use it. Any experiment on Earth involving natural motion will provide direct evidence that gravity pulls objects straight down. They should not use it. The experiment has several dimensions of motion, including one parallel to the ground, so the motion of the ball does not directly test the force of gravity. They should not use it. The experiment has several dimensions of motion, including one parallel to the ground, so the motion of the ball does not directly test the force of gravity. They should use it. The experiment shows the ball falls toward the bottom of the hill, so it provides direct evidence that gravity pulls an object downward. They should use it. The experiment shows the ball falls toward the bottom of the hill, so it provides direct evidence that gravity pulls an object downward. They should not use it. Gravity should be tested in space, and this experiment could only be tested on Earth.
The ball raised up the hill is given gravitational potential energy, which
causes it to roll spontaneously down the hill.
The statement that explains whether the ball rolling down the hill
experiment should be used is; The experiment shows the ball falls toward
the bottom of the hill, so it provides direct evidence that gravity pulls an
object downward. They should use it.
Reason:
The equation for the velocity of a ball falling down a hill is [tex]v = \sqrt{\dfrac{10}{7} \cdot g \cdot h}[/tex]
Therefore, by increasing the height from which the ball rolls down the hill,
the velocity of the ball increases, which indicates that the ball is
accelerating, and therefore, being acted on by a force, the force of gravity.
Therefore;
Given that the ball falls or moves with increasing speed towards
the bottom of the hill, which shows that the motion is due to Earth's pull
known as the gravitational force, the experiment should be used.
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