Answer:
P = 5400[W]
Explanation:
We must use the following equation of kinematics to calculate the acceleration.
[tex]v_{f}=v_{o}+a*t[/tex]
where:
Vf = final velocity = 9 [m/s]
Vo = initial velocity = 0 (starting from rest)
a = acceleration [m/s²]
t = time = 1.5 [s]
[tex]9=0+a*1.5\\a=9/1.5\\a=6[m/s^{2} ][/tex]
Now with this second equation of kinematics, we can determine the distance traveled.
[tex]v_{f}^{2}=v_{o}^{2}+2*a*x[/tex]
where:
x= distance [m]
[tex]9^{2} = 0 +2*6*x\\12*x=81\\x=6.75[m][/tex]
Now we must use Newton's second law which tells us that the sum of forces is equal to the product of mass by acceleration.
∑F = m*a
Now replacing:
[tex]F=100*6\\F=600[N][/tex]
Ahora la potencia se puede calcular por medio del producto de la fuerza por velocidad.
[tex]P=F*v[/tex]
where:
P = power [W]
F = force = 600 [N]
v = velocity = 9 [m/s]
[tex]P=9*600\\P=5400[W][/tex]
The planet Venus has a mass of 4.87 × 1024 kg and a radius of 6.05 × 106 km. What is the magnitude of the gravitational force that an 81-kg person would experience while standing on the surface of Venus?
Answer:
7.2 x 10⁻⁶N
Explanation:
Given parameters:
Mass of Venus = 4.87 x 10²⁴kg
Radius = 6.05 x 10⁶km = 6.05 x 10⁹m
Mass of person = 81kg
Unknown:
Gravitational force = ?
Solution:
To solve this problem, we use the Newtons law of universal gravitation:
Fg = [tex]\frac{G x mass of venus x mass of person}{radius^{2} }[/tex]
G is the universal gravitation constant = 6.67 x 10⁻¹¹
Fg = [tex]\frac{6.67 x 10^{-11} x 4.87 x 10^{22} x 81 }{(6.05 x 10^9)^{2} } }[/tex]
Fg = 7.2 x 10⁻⁶N
You and your little cousin sit on a see-saw. You sit 0.5 m from the fulcrum, and your cousin sits 1.5 m from the fulcrum. You weigh 600 N. How much does she weigh?
Answer:
200N
Explanation:
Distance from fulcrum by you = 0.5m
Distance from fulcrum by cousin = 1.5m
Your weight = 600N
Unknown:
Weight of my cousin = ?
Solution:
From the principle of moment, when an object is balanced, the sum of the clockwise moment is equal to the sum of the anti-clockwise moment.
So;
Your weight x distance from fulcrum by you = Weight of cousin x her distance from the fulcrum
600 x 0.5 = weight of cousin x 1.5m
Weight of cousin = 200N
When a skydiver is falling and the force of air resistance is equal to the force of gravity, what happens to the skydiver's motion?
Answer:
Terminal Velocity
Explanation:
A difference between mechanical and electromagnetic waves is
a. Only mechanical waves can measure frequency
b. Only electromagnetic
waves travel through gas particles
c. Only electromagnetic waves travel
through space
d. Only mechanical waves include light
Answer:
c. Only electromagnetic waves travel through space
Explanation:
Electromagnetic waves are the only waves that travels through space or vacuum.
These waves do not require any material medium for their propagation as the case may be.
Mechanical waves requires a material medium before they can be propagated. But mechanical waves do not require any medium. They readily move through space without any attenuation. This is the salient difference between electromagnetic and mechanical waves.help please.
How many days occur between a new moon and a first quarter moon?
Answer:
7 days or a week
Explanation:
what is the acceleration of a 10kg mass pushed by a 5N force?
Answer:
0.5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
From the question we have
[tex]a = \frac{5}{10} = \frac{1}{2} \\ = 0.5[/tex]
We have the final answer as
0.5 m/s²Hope this helps you
How does a lid slow down evaporation cooling??
Answer:
It reflects the gas from entering the air and the other gases from the bottom, pushes the top gases that can't get through making it slow down, and eventually stop.
Explanation:
Ex: When you go on a slide and sit at the bottom, the other kids go down and stop behind you. So does the next kid and the next stopping the process of kids going down the slide.
What is the average velocity of atoms in 2.00 mol of neon (a monatomic gas)
at 308 K? Use the equation: -mv2=nRT
For m, use 0.02000 kg. Remember that R = 8.31 J/(mol-K).
O
A. 876 m/s
O
B. 87.6 m/s
O
C. 1540 m/s
O
D. 15,400 m/s
Answer:
876m/s
Explanation:
Using the formula
1/2mv² = 3/2nRT
mv² = 3nRT
m is the mass = 0.02kg
v is the average velocity of atom
n is the mole = 2.00atm
T is the temperature = 308K
R is the Boltzmann constant = 8.31 J/(mol-K).
Get the velocity
v² = 3nRT/m
Substitute the given values into the formula
v² = 3×2(8.31)(308)/0.02
v² = 3×5,118.96/0.02
v² = 15356.88/0.02
V = √767844
v = 876.27m/s
Hence the average velocity of the atom us 876m/s
I will award brainliest...Please what is the work done by a man who is pulling a box of 45kg of mass by means of rope which makes angle of 45 degrees?
Answer:
No work is done since no distance is given
Explanation:
Since no distance is given, the force is not doing any work
No work is done by the man since we do not know the distance or displacement.
Work is only said to be done when the force applied on an object moves it through a particular distance.
Work done = Force x distance.
Since no distance is given in this problem, we can as well assume that the force applied is doing no work on the object.
Helppp me obi-wan canobi. you are my only hope ;) hehe
Answer:
A
Explanation:
Answer:
A.
Explanation:
explain what is meant by pressure.
Answer:
Pressure means physical force that is another person or object.
To remove a nut from an old rusty bolt, you apply a 100-N force to the
end of a wrench perpendicular to the wrench handle. The distance from
the applied force to the axis of the bolt is 25 cm. What is the torque
exerted on the bolt in N-m?
Answer:
yes its 25cmjdj8dnen8dnejdid
Select the correct answer.
An electric bell is placed inside a transparent glass jar. The bell can be turned on and off using a switch on the outside of the jar. A vacuum is created inside the jar by sucking out the air. Then the bell is rung using the switch. What will we see and hear?
A.
We’ll see the bell move, but we won’t hear it ring.
B.
We won’t see the bell move, but we’ll hear it ring.
C.
We’ll see the bell move and hear it ring.
D.
We won’t see the bell move or hear it ring.
E.
We’ll see the sound waves exit the vacuum pump.
Answer:
An electric bell is placed inside a transparent glass jar. The bell can be turned on and off using a switch on the outside of the jar. A vacuum is created inside the jar by sucking out the air. Then the bell is rung using the switch. What will we see and hear?
A.
We’ll see the bell move, but we won’t hear it ring.
B.
We won’t see the bell move, but we’ll hear it ring.
C.
We’ll see the bell move and hear it ring.
D.
We won’t see the bell move or hear it ring.
E.
We’ll see the sound waves exit the vacuum pump.
Explanation:
so, the answer to the question is
A.
We'll see the bell move, but we won’t hear it ring.
Answer:
A.
We’ll see the bell move, but we won’t hear it ring.
Explanation:
Sound waves need a medium to travel and cannot travel in vaccuum
How many significant figures below?
3.7 x 10^-3 L
A. 1
B. 2
C. 3
D.4
E. 0
Answer:C.3
Explanation:
PLEASE HELP ME I WILL GIVE BRAINLYEST!!
The gravitational pull of Jupiter is greater than the gravitational pull of Earth. How would adding a “JUPITER MODE” to the virtual activity change the results of Galileo’s experiment?
Answer:
It wouldn't do this because the gravity of Jupiter is 2 and ½ times more powerful than here on Earth.
Explanation:
Brainliest?
No change in the results of Galileo’s experiment happens on adding a “JUPITER MODE” to the virtual activity .
What is the results of Galileo’s experiment (Pisa tower experiment)?Galileo noticed that when two objects are dropped from a certain height, they both fall to the ground at the same time.From a specific height, all bodies of any mass will fall simultaneously and at the same moment. That means that all bodies in free fall accelerate at the same rate. We are aware that the force to mass ratio determines acceleration.In the same force field, a larger body experiences more force than a smaller one. This means that for all free-falling bodies, acceleration is constant.The gravitational pull of Jupiter is greater than the gravitational pull of Earth. But these pulls are same for all masses. So, again all bodies of any mass will fall simultaneously and at the same moment. Hence, no change in the results of Galileo’s experiment happens.
Learn more about gravity here:
https://brainly.com/question/4014727
#SPJ2
a brick 25cm long ,9cm wide 5cm thick has a mass of 1000g determine the greatest pressure that can be exerted by the brick on a flat surface
Answer:
The greatest pressure is 2178 Pa
Explanation:
Pressure
It's the force applied perpendicular to the surface of an object per unit area over which the force is distributed.
If F is the force applied and A is the surface area, the pressure is calculated as:
[tex]\displaystyle P=\frac{F}{A}[/tex]
The brick has dimensions of 25 cm by 9 cm by 5 cm. There are three possible areas of contact:
[tex]A_1=25*9 = 225 cm^2=0.0225\ m^2[/tex]
[tex]A_2=25*5= 125 cm^2=0.0125\ m^2[/tex]
[tex]A_3=9*5= 45 cm^2=0.0045\ m^2[/tex]
The brick has a mass of m=1000 g = 1 Kg and exerts a force equal to its weight when placed on a flat surface, thus:
F = m.g = 1 * 9.8 = 9.8 N
The greatest possible pressure will occur when the area is the least possible [tex](0.0045\ m^2)[/tex], since the pressure and the area are inversely proportional, thus:
[tex]\displaystyle P_{max}=\frac{9.8}{0.0045}[/tex]
[tex]\displaystyle P_{max}=2178 \ Pa[/tex]
The greatest pressure is 2178 Pa
PLEASE HELP ME
When an object is struck and sound is produced, explain the direction of the sound wave.
Answer:
The sound goes in every direction, except into the two objects that make contact.
Explanation:
The waves need somewhere to go, but can't travel into the two objects that were struck, so therefore the sound explodes forth in every which way and ends up in your ear.
At the time when the object should be struck and the sound should be generated so here the direction should be at each and every direction but does not make any contact.
What is a sound wave?It is the wave that develop the disturbance pattern which leads into the energy movement that should be traveled via the medium like the air, water, etc. Also, it leads to the vibration like when the phone is ringed or the vocal cords of the person.
hence, At the time when the object should be struck and the sound should be generated so here the direction should be at each and every direction but does not make any contact.
Learn more about waves here: https://brainly.com/question/21849636
What is the mass of an object if it has a momentum of 18 kg m/s and a velocity of 3.0 m/s?
Answer:
Mass, m = 6 kg
Explanation:
Given that,
The momentum of the object, p = 18 kg-m/s
Velocity, v = 3 m/s
We need to find the mass of an object.
The momentum of an object is given by :
p = mv
m is mass of the object
[tex]m=\dfrac{p}{v}\\\\m=\dfrac{18\ kg-m/s}{3\ m/s}\\\\m=6\ kg[/tex]
So, the mass of the object is 6 kg.
Choose one thing in each label to identify the parts of DNA
Label A: Chorosome, genes, nitrogen bases, or sugar phosphate backbone
Label B: Chorosome, genes, nitrogen bases, or sugar phosphate backbone
P.S (WILL GIVE BRAINILIST IF YOU HELP! P.P.S (I don’t know what subject of science this is so I just picked physics)
change 200km/hr into m/sec
Answer:
hey there!Explanation:
hope it is correct
it is. 55.556 metres per second
hope it helps. and have a nice day!when will an object accelerate in terms of force
Answer:
when an external force applied on an object
Explanation:
there will be a change in velocity this means it is accelerating
WILL MARK BRAINLIEST (real answers only please)
A driver on a rural road slams on the brakes to avoid hitting a cow and comes to a stop. Skid marks made while the brakes were applied are 280 feet long. If the tread on the tires produced a coefficient of kinetic friction of 0.3 with the road, how fast was the car moving? 1 m/s=2.237 mph.
35 mph
25 mph
45 mph
50 mph
Answer:
The car moving with speed 50 mph
Explanation:
We are given that
Distance, s=280 feet=85.3 m
1 feet=0.3048 m
Coefficient of kinetic friction=[tex]\mu_s=0.3[/tex]
1 m/s=2.237 mph
We have to find the speed of car moving.
Speed, v=[tex]\sqrt{2\mu_s gs}[/tex]
Where [tex]g=9.8ms^{-2}[/tex]
Using the formula
Speed of the car,v=[tex]\sqrt{2\times 0.3\times 9.8\times 85.3}[/tex]
Speed of the car,v=22.4 m/s
Speed of the car, v=[tex]22.4\times 2.237\approx 50 mph[/tex]
Hence, the car moving with speed 50 mph
Option d is true.
helpp pls .. Which statement is true about the process shown?
Answer:
I think its A
Explanation:
What kinds of stars have either no habitable zones or very inferior ones
Which event in a solar cell uses the photoelectric effect?
A. Electromagnetic waves strike a semiconductor, removing some of
its electrons, which form a current,
B. Electromagnetic waves act according to the wave model of light,
not the particle model.
C. Electrons flow from the negatively charged semiconductor to the
positively charged one.
D. Electromagnetic waves remove electrons from the transparent
glass on the top of the cell.
Explanation:
Photovoltaic energy is a clean, renewable source of energy that uses solar radiation to produce electricity. It is based on the photoelectric effect—the emission of electrons when electromagnetic radiation (i.e. light) hits a material.
Answer:
electromagnetic waves strike a semiconductor , removing some of the electrons ,which form a current
Explanation:
aPe~X!
Please hurry this is urgent right answers only!!!!!
How do you know when forces are balanced (zero net
force) or unbalanced in a system? Draw a labeled
diagram to support your explanation.
Explanation:
if two individual forces are of equal magnitude and opposite direction, then the force is said to be balanced. when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction.
How will this change in income affect consumer spending in the economy?
A Increase spending
B Decrease spending
I need help y’all
Help me out
Answer:. 4+5+34+34+44+53 equals174 divide by 6 equals 29 hope this helps ®:]©™
Explanation:
pls guys what is displacement
Answer:
Displacement is the shortest distance from your initial position to your final position. Therefore, displacement is a measurement of distance and not an "end-point."
Explanation:
Displacement is a difference between an initial value and a final value, not factoring in any changes that happen in between. For example you let an object of a certain volume sink to the bottom of a container of water, the water level will be displaced, or changed, by exactly the volume of that object.
Example: A marble with volume of 3 cm³ is dropped into a graduated cyllinder with 10 mL of water. The water level rises to the 13 mL mark, so the displacement of the water by the marble is exactly 3 mL.
This doesn't just apply to a change in volume: If I move a box 3 meters along an axis in the positive direction, we say its displacement along that axis is 3 meters. If I moved it in the negative direction the same distance, the displacement would be -3 meters.
If a 0.75 efficient motor produces 150 W of useful power, what was the input power? *
Answer:
The input power is 200 W
Explanation:
Motor Efficiency
The efficiency of a motor can be calculated as follows:
[tex]\displaystyle \beta=\frac{P_o}{P_i}[/tex]
Where:
β = efficiency
Po = Output power
Pi = Input power
Solving for Pi:
[tex]\displaystyle P_i=\frac{P_o}{\beta}[/tex]
The efficiency is β=0.75 and the output power is Po=150 W, thus the input power is:
[tex]\displaystyle P_i=\frac{150}{0.75}[/tex]
[tex]P_i=200 \ W[/tex]
The input power is 200 W
