Answer:
~3.77 m/s²
Explanation:
We can use the equation for finding the acceleration due to gravity on a planet:
[tex]\displaystyle g=G\frac{M}{r^2}[/tex] G = 6.67 * 10^(-11) N m²/k² M = mass of the planet (kg)r = radius of the planet (m)We are given the mass of the planet, 6.42 * 10^23 kg, and the radius of the planet, 3370 km.
Let's first convert the radius of the planet to m:
3370 km → 3370000 mNow, we can plug all of these variables into the equation and solve for g, the acceleration due to gravity on this planet; which, in this case, is Mars.
[tex]\displaystyle g=6.67\cdot10^-^1^1 \frac{6.42\cdot10^2^3}{(3370000)^2}[/tex] [tex]\displaystyle g=\frac{4.28214\cdot 10^1^3}{(3370000)^2}[/tex] [tex]g=3.77051836[/tex]The acceleration due to gravity on Mars is about 3.77 m/s².
3. You have $20, and Uncle Harny gives you $10 each second
for 3 seconds. How much money do you have after 3 seconds?
A box of books weighing 215 N moves at a constant velocity across the floor when the box is pushed with a force of 135 N exerted downward at an angle of 30° with the horizontal. Find μk between the box and the floor.
Answer:
μk ≈ 0.414
Explanation:
The normal force at the box/floor interface is the sum of the weight and the vertical component of the applied force:
normal force = 215 N + (135 N)sin(30°) = 282.5 N
The tangential force is the horizontal component of the applied force:
tangential force = (135 N)cos(30°) ≈ 116.91 N
Then the coefficient of friction is ...
μk = (tangential force)/(normal force) = (116.91 N)/(282.5 N)
μk ≈ 0.414
8
A tennis ball machine fires a ball vertically upwards at time
t=0 at 19.6 m/s. Assume that air resistance is negligible and
take g =9.8 m/s
a) Calculate the displacement and velocity of the ball at
t=1.0 s, 2.0 s, 3.0 s and 4.0 s.
b) Use your answers to part a) to draw
i) a graph of displacement against time for the ball
ii) a graph of velocity against time for the ball.
Answer:
table and graph are attached
Explanation:
a) The velocity of the ball will be ...
v(t) = v0 -at
v(t) = 19.6 -9.8t
The position of the ball will be the integral of this:
h(t) = ∫v(t)·dt = 19.6t -(1/2)(9.8t^2)
The attached table calculates the vertical position in meters for the required times.
__
b) Graphs of displacement (h(t)) and velocity (h'(t)) are shown in the attachment.
Why does carbon dioxide have a higher bond order than water?
Answer:
This is due to the stronger bond that forms between carbon and oxygen, which is greater than the bond between hydrogen and oxygen.
Explanation:
Answer:
Carbon dioxide has a higher bond order compared to water. This is due to the stronger bond that forms between carbon and oxygen, which is greater than the bond between hydrogen and oxygen.hope it helps and brainliest if helped........
I need help with these questions :
(see image)
Answer:
I think it's letter b.
correct me if my answer is wrong.
Initial velocity = [tex]V_0 = 50\frac{m}{s}[/tex]
Height = H = 100 m
Acceleration due to gravity = g = 10 m/s^2
Time of flight = ?
Angle of projection= θ(theta) = ?
Range attained = ?
_____________________________________A) The Relation between Height and Total time of flight is given by,
[tex]T = 2(\sqrt\frac{2H}{g})\\\\T = 2( \sqrt\frac{2x100}{10})\\\\T = 2(\sqrt\frac{200}{10})\\\\T = 2(4.47)\\\\T = 8.94 seconds[/tex]
_____________________________________B) Total time of flight is given by,
[tex]H = \frac{V_0^2Sin^2(theta)}{2g}\\\\100 x2x10 = 50^2Sin^2(theta)\\\\2000 = 2500Sin^2(theta)\\\\\frac{2000}{2500} = Sin^2(theta)\\\\Sin^2(theta)= \frac{4}{5}\\\\[/tex]
Square root on both sides,
[tex]Sin(theta) = \frac{2}{\sqrt{5}}\\\\theta = Sin^{-1}(\frac{2}{\sqrt{5} })\\\\theta = 63.4 degrees[/tex]
_____________________________________C) The range attained is given by,
[tex]R = \frac{V_0^2}{g} xSin2(theta)\\\\R = \frac{50^2}{10} x Sin(2x63.4)\\\\R = 250 x 0.8\\\\R = 200meters[/tex]
_____________________________________Best Regards,'Borz'A number of energy transformations occur when water that is stored behind a dam is changed into electrical energy. For each step listed, identify the energy transformation. Lake water flows downward through tunnels. Flowing water turns turbines. Turbines generate electricity.
Answer:
Explanation
✔ potential to kinetic
✔ kinetic to mechanical
✔ mechanical to electrical
Answer:
b , c , b is the answer
Explanation:
You can only score 1 point when shooting a free throw. Group of answer choices True False
Answer:
true
Explanation:
When shooting a free throw you can only receive 1 point for the team
2. What causes a repelling force?
Answer:
If two magnetic south poles or two magnetic north poles are brought near each other, the magnetic force is repulsive and the magnets will push against each other in opposite directions. If opposite poles are brought near, it is attractive. But the fundamental origin of the magnetic field is moving charge.
When sunlight shines on a leaf the leaf looks green why does the leaf look green
It absorbs all the white light and turn most of it into green light
It absorbs only the green part the light
It reflects the green light waves and absorbs most of the rest
It gives off its own green light
Answer:
Green light is not absorbed but reflected, making the plant appear green. Chlorophyll is found in the chloroplasts of plants. There are various types of chlorophyll structures, but plants contain chlorophyll a and b. These two types of chlorophyll differ only slightly, in the composition of a single side chain.
Explanation:
Hope that helps.
Using snell's law. Determine what angle a light wave bends at when it
leaves air and enters water at an angle of 30 degrees.
Answer:
Angle of refraction is 23° .
Explanation:
[tex] \frac{ \sin(0w) }{ \sin(0a) } = \frac{n \: a}{n \: w} [/tex]
[tex] \frac{ \sin(30) }{ \sin \: 0a } = \frac{1.3}{1.0} [/tex]
[tex] \sin \: 0w \: = \: \frac{ \sin(30) }{1.3} [/tex]
[tex] = 0.3846153846[/tex]
[tex] \sin^{ - 1} (0.3846153846[/tex]
[tex]0w \: = \: 23 ^{o} [/tex]
5. What is the amplitude and wavelength of the wave?
Answer:
Amplitude = 5 cm
Wavelength = 30 m
Explanation:
Amplitude is the maximum displacement. According to the graph, the maximum height is the maximum displacement which is equal to 5cm.
Wavelength is the same distance between two successive Crest or trough.
From the graph the wavelength is 30 metres.
That is,
Amplitude = 5 cm
Wavelength = 30 m
The acceleration produce by a force 100N in a mass 50kg is?
Answer:
a = 2 m/s2
Explanation:
DATA
GIVEN:
m = 50 kg
f = 100 N
REQUIRED:
a = ?
FORMULA:
newtons second law states
F = ma
a = f/ m
SOLUTION:
a = 100 / 50
a = 2 m/s2
ANSWER:
a = 2 m/s 2
Answer:
2 m/[tex]s^{2}[/tex]
Explanation:
You can get the acceleration of an object if you know the formula for "Force."
The formula for Force is:
F = m x aF = Force
m = mass
a = acceleration
Now that you know the formula for force, you can get the formula for acceleration.
a = [tex]\frac{F}{m}[/tex]a = [tex]\frac{100 N}{50 kg}[/tex]1 N = 1 kg.m/[tex]s^{2}[/tex]
a = [tex]\frac{100kg.m/s2}{50 kg}[/tex]a = 2 m/[tex]s^{2}[/tex]Therefore, the acceleration produced is 2 m/[tex]s^{2}[/tex].
What is the current in a 160V circuit if the resistance is 10Ω?
Hello!!
For this, use the formula:
[tex]\boxed{I=V/R}[/tex]
[tex]\textbf{Being:}[/tex]
[tex]\sqrt{}[/tex] [tex]I = Current = ?[/tex]
[tex]\sqrt{}[/tex] [tex]V = Voltage = 160 \ V[/tex]
[tex]\sqrt{}[/tex] [tex]R = Resistance = 10\ \varOmega[/tex]
[tex]\textbf{If we replace and resolve it}[/tex]
[tex]I = 160\ V / 10\ \varOmega[/tex]
[tex]I = 16\ A[/tex]
[tex]\text{The current of that circuit is \textbf{16 Amperes}}[/tex]
PLS HELP ME WORTH 10 freakin points
1-1
2-3
3-2
4-4
This is the match
PLZZZ HELP!!!
State the forces in a spring, magnets, electric scales, and a newton metre
Answer:
The various kinds of forces that exist in the items below are:
Spring = Spring Force
Magnet = Magnetic Force
Electric Scale = Electric Force
Newton Metre = Spring Force
Explanation:
Spring Force:
When you fix an object unto or upon a spring, the resulting compression or stretching exerted by that object on the spring is called the Spring Force. Conversely, the object is acted upon by the force that brings back the object to its state of equilibrium of rest.
Magnetic Force:
The motion between electrically charged particles always results in magnetic force. This is the primary force that is active in electric motors and normal magnets.
Electric Force
In order to create an electric force, you'd need to charge two particles and bring them in proximity to one another. Usually, they'll either repel or attract one another. This attraction or repulsion is known as an electric force.
Cheers
Un automobil pleaca din dreptul bornei kilometrice 134 la ora 10h si 20 min si ajunge in dreptul bornei kilometrice 219 la ora 11h si 20min.Calculati viteza medie a automobilului
Răspuns: 23. 6 m / s
Explicaţie:
Pentru a obține viteza medie a mașinii:
Luăm viteza medie a mașinii:
Modificarea distanței / schimbarea timpului
Schimbarea distanței:
(219 - 134) KM = 85 km
Schimbarea în timp:
(11 ore 20 min) - (10 ore - 20 min) = 1 oră
Prin urmare, viteza medie:
Schimbarea distanței / schimbarea timpului
85/1 = 85 km / oră
În metru pe secundă:
(85 * 1000) m / 3600
85000/3600 USD = 23,6 m / s
WAVES AND SOUND
A girl, standing 150m in front of a tall building, fires a shot using a starting pistol. A boy, standing
350 m from the girl, hears two bangs 1s apart.
From this information, what is the speed of sound in air?
C 500 m/s
D 650m/s
B 350m/s
A 300 m/s
Answer:
i think it is B
Explanation:
It was a children versus grown-ups competition at school. One event required the adult to throw a basketball as far as he could. When it was the child's turn, he had to throw a baseball instead. The event coordinator said, "It's only fair!" Based on Newton's laws, was this event fair?
Yes, because acceleration doesn't depend on the size of the object.
Yes, because an adult can apply more force than a child can. Making the adult's object bigger than the child's object helps to even out the acceleration.
No, because you must have the same size object in a competition.
No, because a basketball is bigger than a baseball, and objects that are bigger accelerate slower.
Answer:
No, because a basketball is bigger than a baseball, and objects that are bigger accelerate slower.
Explanation:
These the flow of electrons (the current) and where some of the electrons' energy gets converted into heat. (Lessons 5.01-5.03) Question 1 options: electric currents Insulators Resistors Conductors
Answer:
Conductors.
Explanation:
Conductors allow the flow of electrons i. e. the current and where some of the electrons energy gets converted into heat while some electrons energy converted into light. Conductors are the materials which has the ability to allow heat and electricity to flow through them. Metals such as gold, copper, Silver, Aluminum, Mercury, Steel, Iron and salty water etc are good conductors of heat and electricity.
Numerical problems:
A force of 500N acts on the area of 2.5m2; calculate the pressure
exerted,
(Ans: 200 Pa]
b. Calculate the force applied when 400 Pa of pressure is exerted by a box
of surface area 2m2.
(Ans: 800 N]
The weight of a stone is 1400N. If it exerts a pressure of 700 Pa, calculate
the area.
(Ans: 2m]
d. A force of 2000 N acts on 5m² surface area. Calculate the pressure
exerted.
(Ans: 400 Pa]
c.
Answer:
this is answer please mark me as brainlest
Explanation:
A force of 500N acts on the area of 2.5m2; calculate the pressure
exerted,
(Ans: 200 Pa]
b. Calculate the force applied when 400 Pa of pressure is exerted by a box
of surface area 2m2.
(Ans: 800 N]
The weight of a stone is 1400N. If it exerts a pressure of 700 Pa, calculate
the area.
(Ans: 2m]
d. A force of 2000 N acts on 5m² surface area. Calculate the pressure
exerted.
(Ans: 400 Pa]
c.
Explain why an open umbrella will hit the ground after a closed umbrella
Answer:
An open umbrella would not hit the ground before the closed one. Explanation: The closed umbrella would hit first because it doesn't have as much air pressure hitting it. The open one has air pushing against it making it to where the open umbrella floats but falls slowly.
An open umbrella will hit the ground after a closed umbrella because it has
a larger surface area and more air pressure and resistance.
An open umbrella has more surface araea which means more air particles
interacting with it. This slows it down and is the reason it hits the ground
after the closed umbrella.
Closed umbrella on the other hand have a smaller surface area and less air
resistance which is why it hits the ground faster.
Read more on https://brainly.com/question/24882838
What type of energy does friction produce?
Answer: thermal energy
Explanation:
I just want to finish this quiz and go to sleep, please help me get this done.
Using language from newton's laws of motion, describe why the space shuttle seen in the picture is able to take off.
Answer:
newton's inertia law
something goes one way while the other goes the opposite direction.
What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high?
The potential energy is ______ J.
Answer:
15,000 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
PE = 150 × 10 × 10
We have the final answer as
15,000 JHope this helps you
Answer:
14,700
Explanation:
The nuclear power used for electricity is produced by
a. fusion
c. a chemical reaction.
b. fission.
d. radon gas.
Answer:
b.fission.Explanation:
Please mark my answer as a brainliest.Please follow me ❤❤❤If a massive car were brought into space it would have NO (bubble all that apply) a .mass b.) inertia c.) weight
Explanation:
The car still retains its mass because the matter is still there. The particles that make up the car are still present. The car also has inertia since inertia is effectively a measure of mass. We can rule out choices A and B because of these reasons.
The car wouldn't have weight in space because the pull of gravity isn't as strong. The pull of gravity is still there, but it's much more miniscule which produces the weightlessness of the object. Recall that the force of gravity reduces as the distance between the objects increases.
A 4.5 kg rabbit moves with a constant acceleration of 2.1 m/s2. Determine the net applied force responsible for the acceleration. *
Answer:
F = 9.45 N
Explanation:
Given that,
Mass of a rabbit, m = 4.5 kg
It moves with a constant acceleration of 2.1 m/s².
We need to find the net applied force responsible for the acceleration. We know that net force is equal to the product of mass and acceleration. SO,
F = ma
F = 4.5 kg × 2.1 m/s²
F = 9.45 N
So, the net applied force is 9.45 N.
Which organelle in the plant cell would mainly help the cell get rid of water and how do you know
what is the importance of measurement?
Answer:
To know the time ,length area
3. The velocity of sound is 332 m/s. Answer the following questions:
i) What is the minimum and maximum frequency of sound which
is heard to the human ear?
ii) What is the wavelength of the shortest and longest waves heard
to the human ear?
Answer:
3 i) The minimum frequency of sound which is heard by the human ear is 20 Hz
The maximum frequency of sound which is heard by the human ear is 20 kHz
ii) The wavelength, λ, of the shortest wave audible to human hear is 16.6 mm
The wavelength, λ, of the longest wave audible to human hear is 16.6 m
Explanation:
The given parameters are;
The velocity of sound, v = 332 m/s
The frequency, f, of sound is given by the following formula;
v = f × λ
Where;
λ = The wavelength of sound
i) The frequency of sound audible to human hearing are from 20 Hz to 20 kHz, therefore;
The minimum frequency of sound which is heard by the human ear = 20 Hz
The maximum frequency of sound which is heard by the human ear = 20 kHz
ii) The wavelength, λ, of the shortest wave audible to human hear = The wavelength of the highest frequency audible to human hear = v/f = (332 m/s)/(20,000 Hz) = 0.0166 m = 16.6 mm
The wavelength, λ, of the longest wave audible to human hear = The wavelength of the shortest frequency audible to human hear = v/f = (332 m/s)/(20 Hz) = 0.0166 m = 16.6 m.
