Answer:
3200 seconds
Explanation:
If he ran at 3 m/s for 28.5 seconds, he would have run 85.5 meters
29 seconds would be 87 meters run not 9.5 km
A 55 kg boy is throwing a 0.23 kg baseball up in the air. He decides to see how high he can throw it and uses a timer to see how long the ball stays in the air. He throws the ball as hard as he can straight up in the air and finds that it takes 5.5 seconds to come back to him. How long did it take for the ball to reach its highest point? (half the time it was in the air)
Answer:
2.75 s
Explanation:
From the question given above,
Total time (T) spent by the ball in air = 5.5 s
Time taken (t) to reach the greatest height =...?
Thus, we can obtain the time taken (t) for the ball to reach the greatest height as follow:
T = 2t
Where:
T is the total time spent by the ball in air.
t is the time taken to reach the greatest height
Total time (T) spent by the ball in air = 5.5 s
Time taken (t) to reach the greatest height =...?
T = 2t
5.5 = 2 × t
Divide both side by 2
t = 5.5/2
t = 2.75 s
Therefore, the time taken (t) to reach the greatest height is 2.75 s.
An object weighs 530.0 Newton. It is being pushed along a horizontal surface by a 340.0-
Newton force. Determine the mass of the object. Enter a numerical answer.
Answer:
54.08 kg
Explanation:
The weight of an object is the force of gravity acting on the object and is related to the mass of the object as;
Weight = mass x acceleration due to gravity (g), where g = 9.8 m/s.
Hence, the weight of the object is only dependent on its mass and g, not on any other force. Now, if the weight is 530.0 N,
530 = m x 9.8
m = 530/9.8
= 54.08 kg
Therefore, the weight of the object is 54.08 kg.
If a substance has a density of 2.7g/cm3 and a mass of 86.4g, what is its volume?
Answer:
32cm³
Explanation:
Given parameters:
Density of substance = 2.7g/cm³
Mass of substance = 86.4g
Unknown:
Volume of substance = ?
Solution:
Density is the mass per unit volume of a substance.
Density = [tex]\frac{mass}{volume}[/tex]
Since the unknown is volume we solve for it;
mass = density x volume
86.4 = 2.7 x volume
volume = [tex]\frac{86.4}{2.7}[/tex] = 32cm³
You throw a ball straight up into the air at a velocity of 15 m/s. You want to know how high above your hand the ball will be at exactly 2.5 sec after you released it. You must SHOW ALL WORK to receive credit!!! Of the 5 motion variables - Vi, Vf, a, ΔX, and T, identify which one you are solving for and the magnitudes and directions of all of the others that are known: Which of the motion equations is best to use to determine the height of the ball? How high is the ball above your hand at 2.5 sec after you throw it?
Answer:
6.875mExplanation:
Given
Velocity = 15m/s
Time = 2.5secs
Required
Distance above your hand the ball will be at exactly 2.5secs
using the equation of motion:
ΔX = ViT + 1/2aT²
ΔX is the distance
Vi is the velocity of the ball in air
a is the acceleration due to gravity
T is the time taken
Since the ball is thrown straight up, a = -g
ΔX = ViT - 1/2gT²
Substitute
ΔX = 15(2.5) - 1/2(9.8)(2.5)²
ΔX = 37.5-30.625
ΔX = 6.875m
Hence the ball will be 6.875m above your hand at 2.5secs after you throw it.
How does a simple machine facilitate our work
Answer:
Simple machines are useful because they reduce effort needed for people to perform tasks beyond their normal capabilities.
Explanation:
Answer:
Simple machines are useful because they reduce effort needed for people to perform tasks beyond their normal capabilities.
Explanation:
A spray gun, used to apply paint, uses Bernoulli's principle to function. It contains two tubes inside of it: one tube comes up from the supply of paint and one supplies a flow of compressed air that blows across the top of the paint tube. This rush of air creates ____, which sucks the paint up the tube and into the stream of air.
Answer:
Low pressure
Explanation:
Take two nearby points at the junction of both the tube, let point 1 be in the air tube while point 2 be in the paint tube.
According to Bernoulli's principle, the air at point 1 is moving with some speed which causes the pressure drop inside tube 1, while at point 2 there is no velocity, so there is no pressure drop at that point. In fact, the pressure at point 2 approximately equals the atmospheric pressure.
As both the points are taken is nearby at the junction, to the pressure drop in the flow air pipe causes the suction of fluid from the relatively high-pressure tube (paint tube).
Hence, this rush of air creates low pressure, which sucks the paint up the tube and into the stream of air.
Help please and thank you =D
Answer:
Explanation:
Biomass is the total quantity or weight of organisms in a given area or volume.
In photosynthesis, solar energy undergoes a _______________ when it changes from light energy to chemical energy.
Answer:
chemical change
Explanation:
A force of 49N causes a box to move with an acceleration of 7m/s2. Find the mass of the object
Answer:
The answer is 7 kgExplanation:
To find the mass of the object given the force and acceleration we use the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
f is the force
a is the acceleration
m is the mass
From the question
f = 49 N
a = 7 m/s²
We have
[tex]m = \frac{49}{7} \\ [/tex]
We have the final answer as
7 kgHope this helps you
When a body like earth is moving in a circular path the work done in that case is zero because: (a) Centripetal force acts in the direction of motion of the body (b) Centripetal force acts along the radius of circular path (c) Gravitational force acts along the radius of circular path (d) Centrifugal force acts perpendicular to the radius of circular path
Answer:
(b) Centripetal force acts along the radius of circular path
Explanation:
Centripetal force is a force experienced by a body moving in a circular path. It is expressed mathematically ad F = mv²/r
m is the mass of the body
v is the velocity
r is the radius of the circular path
When a body moves in a circular path, work dome is zero because Centripetal force acts along the radius of circular path and the force is at right angle with the motion of body.
Which statement correctly compares meteoroids, meteors, and meteorites? * Meteors float in space, meteoroids move through the atmosphere, and meteorites have landed on the surface. Meteorites float in space, meteors move through the atmosphere, and meteoroids have landed on the surface. Meteors float in space, meteorites move through the atmosphere, and meteoroids have landed on the surface. Meteoroids float in space, meteors move through the atmosphere, and meteorites have landed on the surface.
Answer:
D.
Explanation:
A meteoroid is a piece of stony debris that float in space and move around the sun in different orbits and speeds.
Meteoroids enter into Earth's surface with a high speed as shooting stars and called meteors. Meteors move through the atmosphere and landed on the surface and it is called a meteorite.
Hence, the correct answer is "D."
what is one second time ?
Answer:
one second is defined au1/86400th the part of a solar day
what is a force that always resists the relative motion of objects or surfaces?
Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
A. 2kg
B. 6kg
C. 8kg
D. 14kg
Answer:
A
Explanation:
We know the force is (16N-12), which is 4N, and we know the acceleration is 2 m/s^2. Meaning, we can solve the formula m = F / a (mass equals force divided by acceleration), and we get 2kg.
calculate the pressure on the ground by a box of mass lokg when
corresponding area of contact w 2 m? (g = 10 ms?)
When a television is turned on, it converts electrical energy into many other forms of energy. Choose all that correctly lists most of these forms.
Sound
Light
Heat
Electricity
Answer:
sound energy and electricity energy
difference between simple machine and complex machine?
Answer:
a simple machine has way less parts than a complex machine like just one pulley or lever. A complex machine has multiple different parts that lead up to one thing being done in the long run.
Explanation:
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Answer:
ok
Explanation:
If you added 5 x more mass into a wheelbarrow, how much greater would
your net force need to be to keep the acceleration the same? *
Answer:
5 x biger
Explanation:
becuze if it ia 5× more it nids 5×more force to be =
please can i have help with this question
A baseball player practicing popups tosses a ball straight up into the air. If the ball is tossed with an initial velocity of 15.78
m/s, how long does it take
to go up and back down?
(I would appreciate it and if possible put the process of solving it )
you should get atheist 10 to 15 seconds
When you push a 1.85-kg book resting on a
tabletop, you have to exert a force of 2.10 N to
start the book sliding. Once it is sliding, however,
you can use a force of only 1.01 N to keep the
book moving with constant speed.
What is the coefficient of static friction between the book and the laptop?
What is the coefficient of kinetic friction between the book and the tabletop?
Answer:
Given:
mb=2.05 kgmb=2.05 kg Mass of the book
fs=2.45 Nfs=2.45 N Static friction
fk=1.50 Nfk=1.50 N Kinetic friction
Which of the statements below is true?
An object’s weight and mass are equal.
An object’s weight is proportional to its mass.
An object’s weight is inversely proportional to its mass.
An object’s weight is always twice its mass.
Answer:
An object’s weight is proportional to its mass.
Which bulb produces a wave with the highest frequency?
Answer:
UV Light I think, sorry if I'm wrong
I need a correct answer plzzzzzzzzzzzzzzzzzzzz
Answer:
option 1
Explanation:
i just used the SOH CAH TOA, and since the given is tan=opposite/adjacent, that should be the answer
1. Which of the following provides a correct answer for a problem that can be solved using the kinematic equations?
A A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
position is 32 m.
B A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
velocity is 16 m/s
C A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's travels a
distance of 16 m
A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
velocity is 24 m/s
E A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
position is 30 m.
1 of 14
2
3
5 6 7 8
9
Answer:
12
Explanation:
12
Match these items.
1. alpha rays
2. plasma
3. fission
4. beta rays
5. gamma rays
6. radioactive
7. fusion
a. splitting/dividing
b. joining together
c. release of atomic particles
d. high-energy light
e. helium nuclei
f. electrons
g. ions and free electrons
Answer:
Alpha Rays - Helium Nuclei
Gamma Rays - High-Energy Light
Fusion - Joining Together
Radioactive - Release of Atomic Particles
Beta Rays - Electrons
Fission - Splitting/Dividing
Plasma - Ions and Free Electrons
Explanation:
The correct match for the given terms:
1. alpha rays -Helium nuclei
2. plasma - ions and free electrons
3. fission - splitting/dividing
4. beta rays - electrons
5. gamma rays - high-energy light
6. radioactive - release of atomic particles
7. fusion - joining together
What is radioactivity?The nucleus of an atom exhibits the phenomenon of Radioactivity due to its instability. Energy will be lost due to the emission of radiation from the unstable nucleus of an atom.
The electrostatic force of repulsion and the powerful forces of attraction keep the nucleus together. The instability increases as the size of the nucleus increases because the mass of the nucleus increases when concentrated. Therefore, Plutonium, Uranium is extremely unstable and undergoes radioactivity.
The emitted radiation from radioactivity always consists of alpha, beta, and gamma particles. Gamma Decay is photons having high energy, Beta Decay consists of Electrons while Alpha Decay consists of a Helium nucleus.
Learn more about radioactive decay, here:
https://brainly.com/question/1770619
#SPJ2
HOW LONG WILL IT TAKE SHINTA TO REACH HIS BROTHERS LOCATION? PLS HELP
Answer:
2 minutes or 120 seconds
Explanation:
The answer is 2 minutes or 120 seconds because 36 km is 36000 m and 36000 divided by 300 is 120, so the answer is 120 seconds, and converted to 2 minutes. Hope it helps!
Whats the atmosphere?
Answer: The atmosphere of Earth is the layer of gases, commonly known as air, retained by Earth's gravity, surrounding the planet Earth and forming its planetary atmosphere.
Explanation:
If the x-component of velocity is 27m/s and the y-component of velocity is -23 m/s, what is the resultant vector?
Answer:
35.47 m/s
Explanation:
[tex]r = \sqrt{( - 23)^{2} + (27) ^{2} }[/tex]
=35.57