Answer: 28.1
Explanation:
The total energy of the ball is the sum of its kinetic and potential energy. It is equal to 792 J. Then, the final velocity of ball when its strikes the ground is 28.1 m/s.
What is kinetic energy?Kinetic energy of an object is the energy gained by its motion whereas, potential energy is stored on the object when the object is at rest.
The total mechanical energy of the ball = Ke + Pe
given, mass of the ball = 2 Kg
height h= 20 m
initial velocity = 20 m/s
Then total energy = 1/2 mv² + mgh = 2 kg [(1/2(20 m/s)² + 9.8 m/s² ×20 m ] = 792 J.
The final velocity Vf = √(2E/m) =√(2×792 J/m)/2 Kg = 28.1 m/s
Therefore, the final velocity of the ball will be 28.1 m/s.
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An object is raised by a height of 8.95 m and gains 3099.1 J in its gravitational potential store. If the object has a mass of 961.1 kg, what is the strength of the gravitational field in N/kg? Give your answer to 2 decimal places.
Answer: Calculate GPE for different gravity of different enviornments - Earth, the Moon, ... kg, g, lb, oz ... variable in the physics equation for gravitational potential energy, when three of ... PEg or PE = gravitational potential energy; m = mass of an object ... have 147.15 Joules of potential energy, PE = 3kg * 9.81 m/s2 * 5m = 147.15 J.
What is the momentum of a car that is 12000 g and is traveling at 45 m/s? (LOOK AT THE UNITS)
a)
267 kg*m/s
b)
540000 kg*m/s
c)
540 kg*m/s
d)
.27 kg*m/s
e)
54000kg*m/s
Answer:
e
Explanation:
If an engine can produce 670 J of energy in 1 min, how many watts can it output?
Answer:
11.2Watts
Explanation:
Given parameters:
Energy produced by the engine = 670J
Time taken = 1min = 60s
Unknown:
Number of watts it can output = ?
Solution:
This problem entails finding the power of the engine.
Power is the rate at which work is being done.
So;
Power = [tex]\frac{Work done }{time}[/tex]
Power = [tex]\frac{670}{60}[/tex] = 11.2Watts
How does the sun maintain its high temperature and energy output?
Answer:
The core of the sun is the region that extends from the center to about 20–25% of the solar radius. It is here, in the core, where energy is produced by hydrogen atoms (H) being converted into nuclei of helium (He). ... The core is the only part of the sun that produces an appreciable amount of heat through fusion.
Explanation:
I got you
By not running out of fuel (Hydrogen).
Rest assured ... When the sun runs low on Hydrogen, it'll go through several complex changes, and it'll end up at much much lower temperature, with much much lower energy output.
light waves from the sun can travel trough outer space and reach the earth
Answer:
this is true
Explanation:
Use the equation d = st, where d = distance, s = speed, and t= time. If you ride
a skateboard at a speed of 8 m/s for 12 seconds, how far do you travel?
O A. 48 m
B. 1.5 m
C. 96 m
D. 4 m
Answer:
C- 96 m
Explanation:
d= st
d= 8 m/s x 12 seconds
d= 96 metres
Is a violin and battery potential energy?
Explanation:
In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. Common types of potential energy include the gravitational potential energy of an object that depends on its mass and its distance from the center of mass of another object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field. The battery is storing the energy but give it something to power and it'll give its energy to the object and a violin strings are like ruber band and if you play the violin it releases a new type of energy sound energy.
what is the difference between the pressure exerted by a soild and by a liquid ?
The
of a wave is the maximum distance that the
particles in a medium move from their rest position as the wave passes.
The AMPLITUDE of a wave is the maximum distance that the particles in a medium move from their rest position as the wave passes.
Jeremy walked at an average rate of speed of 5 km/h. how far had Jeremy walked in 15 minutes?
Answer:
1 half kilometer is right answer
When power and current are known use R = P/I^2 to calculate the resistance.
P = 300 watts
C = 30amps
R = ?
R = resistance, P = Power, 1 = Current
[tex] \sf• \: Power \:( P) = 300 \: watts[/tex]
[tex] \sf• \: Current \: (I) = 30 \: amps[/tex]
[tex] \\ [/tex]
[tex]\bf{ \underline{To \: Find:- }}[/tex][tex] \sf• \: The \: Resistance [/tex]
[tex] \\ [/tex]
[tex] \huge\bf{ \underline{Solution :-:- }}[/tex]
[tex] \bf \red {\bigstar{ Formula \: of \: Power \: (P) = \frac{ {I}^{2} }{R}}}[/tex]
[tex] \sf \rightarrow 300= \frac{ {30}^{2} }{ R} [/tex]
[tex] \sf \rightarrow 300 = \frac{900}{ R} [/tex]
[tex] \rightarrow \sf R = \frac{300}{900} [/tex]
[tex] \rightarrow \sf R = \frac{1}{3} [/tex]
[tex] \rightarrow \sf R = 0.33[/tex]
[tex] \bf \purple{Hence, \: the \: resistance \: is \: 0.33 \: Ω \: . }[/tex]
For an ideal gas, the change in internal energy AU is zero during an
A. isobaric process
B. isochoric process
C. isothermal process
D. adiabatic process
Tafu is working with subatomic particles in the physics lab. a positron is traveling in a straight line down the particle accelerator. tafu models its position with the function p(t)= t2 t â 1 where t>1. in the limit calculations below, if you need to use -â or â, enter -infinity or infinity. (a) calculate the limit
Answer:
Infinity
Explanation:
When you have a limit approaching infinity one method you can use is to remember that the highest power dominants all of the other ones so when we have (t^2)/t-1 like in your problem, we see that t^2 has the highest power of 2 so if that's going to infinity and it's not being divided by any powers higher than it will just be inifinity.
We have that for the Question, it can be said that in the limit calculations below, if you need to use -â or â, enter -infinity or infinity. the limit is
[tex]Lim_{t->\infty} p(t)= \infty[/tex]
From the question we are told
Tafu is working with subatomic particles in the physics lab. a positron is traveling in a straight line down the particle accelerator.tafu models its position with the function
p(t)= t2 t â 1 where t>1.
in the limit calculations below, if you need to use -â or â, enter -infinity or infinity.
(a) calculate the limit
Generally the equation for the Question is mathematically given as
[tex]p(t)=\frac{t^2}{t-1}\\\\Therefore\\\\For Lim_{\infty}\\\\We have\\\\ Lim_{t->\infty} p(t)= Lim_{t->\infty}\frac{t^2}{t-1}\\\\[/tex]
Since, the equivalent degree of numerator (t^2) is greater than that of the denominator
[tex]Lim_{t->\infty} p(t)= \infty[/tex]
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The cheetah can run a distance of 275 m for 9 seconds. Calculate its speed.
Answer: 110000
Explanation:
26/9=30.5555555556
30.5555555556 x 60=1833.33333333
110000 x 60=110000
Need help ASAP
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4. Which of the following sets of EM radiation can harm your body cells?
a. Gamma ray, microwaves, infrared
b. Light, ultraviolet, x-ray
c. Microwaves, ultraviolet, infrared
d. Ultraviolet, x-ray, gamma ray
4) A boy pulls a wagon with a force of 6N to the
left as another boy pushes it with a force of 4N to
the left. What is the net force?
Plss help with my science
Answer:
rotates, axis,not sure,day, not sure, night, revolves, not sure, hemisphere, towards, summer, away, winter
Explanation:
please help! you are awesome! also brainliest :)
The diagram below shows the two forces that keep Earth in orbit around the Sun.
What is responsible for Earth's movement toward the Sun?
A. Sun's forward motion
B. Earth's forward motion
C. Expansion of the universe.
D. force of gravity
Answer:
It's d
Explanation:
Answer: D
Explanation:
Force of gravity
what would the answer be
Answer:
D
Explanation:
The density has a formula of d = m / V.
The volumes are given as the same.
The density will be
d_lead = 113/ V
d_aluminum = 27/V
It does not matter for this question what the volume actually is. Just note that the value of the volume is the same for each ball.
A: incorrect. If the volumes are the same, the density is not the same because the masses are different.
B: incorrect. If the density of the two balls was less than water, the two balls would float. Never going to happen unless the balls are thin shells.
C: incorrect. The exact opposite is the answer.
D: Correct. This is the answer.
what is the foemula for this problem
is a solenoid a magnet or no ??
Answer the term solenoid refers to a long, thin loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electric current is passed through it. Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets
I hope it is helpful
Show the steps im confused.
The answer is 14 m/s
Answer:
14 m/s
Explanation:
KE=1/2mv^2
5880J= 1/2(60kg)v^2
5880J=(30)(V^2)
5880/30=V^2
196=v^2
square root of 196 is 14
A bag weighing 20 N is pushed horizontally a distance of 35 m across a
level floor by a force of 10 N, How much work is done on the bag in
Joules? W=Fd *
Answer:
350J
Explanation:
Given parameters:
Weight of bag = 20N
Distance moved horizontally = 35m
Force applied = 10N
Unknown:
Work done on the bag = ?
Solution:
Work done is the force applied to move a body through given distance.
Work done = Force applied x distance
So;
Work done = 10 x 35 = 350J
A satellite is in orbit 36000km above the surface of the earth. Its angular velocity is 7.27*10^-5 rad/s. What is the velocity of the satellite? (The radius of the earth is 6400km.)
Answer:
v = 3.08 km/s
Explanation:
Given that,
The angular velocity of the satellite = [tex]\omega=7.27\times 10^{-5} rad/s[/tex]
A satellite is in orbit 36000km above the surface of the earth.
The radius of the earth is 6400 km
Let v is the velocity of the satellite. It can be calculated as :
[tex]v=r\omega\\\\v=(36000\times 10^3+6400\times 10^3)\times 7.27\times 10^{-5}\\\\v=3082.48\ m/s\\\\v=3.08\ km/s[/tex]
So, the velocity of the satellite is 3.08 km/s.
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The NGC 3603 region of space is shown below. It is a cloud of gas and dust. Stars are forming in this cloud. How would NGC 3603 be classified?
A. As a nebula
B. As a galaxy
C. As a planet
D. As a solar system
The NGC 3603 region of space is shown below. It is a cloud of gas and dust. Stars are forming in this cloud. The NGC 3603 be classified as a nebula. The correct option is A.
What is a nebula?A tiny, ball-shaped nebula is known as a planetary nebula. It generates an ionized gas that is luminous. Large and typically erratic clouds are produced by diffuse nebulae.
Due to their big stars, they typically form a cluster of stars. a cloud of gas in space that can be seen in the night sky as a vaguely discernible brilliant patch, as something black, or as a shadow against other luminous objects.
Dust and gases, primarily hydrogen and helium, make up nebulae. The mass of gas and dust eventually grows so large that it is forced to collapse by gravity. The material in the cloud's core heats up as a result of the collapse, and this hot core is the start of a star.
Therefore, the correct option is A. As a nebula.
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What is one way that genetic engineering could help humans?
A. Gene therapy may be able to help people with genetic disorders make cells that work properly and alleviate their symptoms.
B. Genetic engineering may help bring much needed vitamins and vaccines to people living in poverty.
C. Genetic engineering may help remove genetic predispositions for certain diseases, such as cancer, from a person’s DNA.
D. These are all ways genetic engineering could help humans.
Answer:
I Choose C, Because Genetically engineered bacteria and other microorganisms are currently used to produce human insulin, human growth hormone, a protein used in blood clotting, and other pharmaceuticals and the number of such compounds could increase in the future.
So Basically There Saying It Can Be Used To Remove Certain Diseases.
A wave with a frequency of 28 Hz has a wavelength of 6 meters. At what speed will this wave travel?
Answer:
168m/s
Explanation:
Given parameters:
Frequency = 28Hz
Wavelength = 6m
Unknown:
Speed of the the wave travel = ?
Solution:
To solve this problem, we us the wave - velocity equation:
Velocity = Frequency x Wavelength
Velocity = 28 x 6 = 168m/s
HELP PLS MARKING BRANLIST 100 PTS TAKING TEST RN
How long will your trip take if you travel 890 km at an average speed of 92 km/hr?
81,880 hrs
9.67 s
9.67 hrs
81,880 s
how to write it in second?
Answer:
like this
Explanation:
What are 2 benefits from vitamin b and 2 food sources?