You shoot a model rocket into the air with a speed of 18.2 m/s. now high does the rocket go?
Answers
how long it burns after launch, how much force it exerts, how much
impulse or acceleration it imparts to the rocket, etc.
The only thing we can do with this question is to think of the craft as
a rock instead of a rocket ... assume that after launch, there are no
forces on it except the force of gravity.
Acceleration of gravity = 9.8 m/s²
This is the amount of speed lost each second.
So the rocket continues to climb for (18.2)/(9.8) = 1.857 seconds
At the bottom, its speed is 18.2 .
At the top, its speed is zero.
Its average speed during the climb is (1/2) (18.2 + 0) = 9.2 m/s .
It climbs at an average speed of 9.2 m/s for 1.857 seconds.
It reaches the altitude of (9.2) x (1.857) = 17.09 meters above the launch pad.
v² = u² + 2gh
as final velocity is 0 m/s ; accleration due to gravity = 9.8 m/s²
(0)²=(18.2)²+2(-9.8)(h)
0=331.24 - 19.6(h)
(-331.24) ÷ (-19.6) = h
therefore h = 16.9 meters
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The energies of two photons you might detect emitted by hydrogen atoms are 10.2 and 2.1 eV. Which photon has the longest wavelength? A.) the 10 eV photonB.) They both have the same wavelength C.) the 2.1 eV photon
A ball rolls down an incline with an acceleration of 10 cm/s^2. If it starts with an initial velocity of 0 cm/s and has a velocy of 50 cm/s when it reaches the bottom of the ramp, how long is the ramp?
Self restraint
b.
Fairness
c.
Caution
d.
Honesty
Answers
By definition we have to:
It is the capacity that the human being has to think at the moment of acting before certain activities, about the possible risks that these can have, and modify their behavior so as not to receive or produce unnecessary damages.
In other words we can say that prudence means acting with caution in certain activities.
Answer:
Prudence means acting with caution.
c.Caution
Answers
The wind machine on an average operates for a time of about .
Explanation:
The wind energy is the method of using the energy carried by the wind to generate the power. The wind energy is the considered as the conventional and clean source of energy.
The wind machines require the high power winds to rotate the blades of the windmill and produce power using the energy of the moving wind.
The winds blow at such high speed for a very small time during the day, the wind machine cannot be expected to work for a longer time during the whole day.
The wind energy can be obtained form a wind mill for a limited time unlike the other form of energy like thermal energy or even the solar energy. The thermal energy can be obtained at anytime due to burning of fuel whereas the solar energy can at least be obtained during the whole day time.
Thus, the wind machine on an average operates for a time of about .
Learn More:
1. Acceleration of the box under friction brainly.com/question/7031524
2. The kinetic energy of an object depends on the brainly.com/question/137098
3. The approximate time taken to walk for 2000 miles brainly.com/question/3785992
Answer Details:
Grade: Middle School
Subject: Physics
Chapter: Energy
Keywords:
wind energy, conventional source, energy, thermal, solar, 3-4 hours, high speed, machine, time, operate.
c. identify the problem
b. select a solution
d. examine pros and cons
Answers
The first step in problemsolving is identifying problem. The correct option is c.
What is problem solving?
Problemsolving, which is a common part of most activities, is the process of achieving a goal by overcoming obstacles.
Problems that require resolution range from simple personal tasks to complex issues in business and technology.
7 Steps can be followed to allow the problem solving success
- Step 1: Identifying the Problem.
- Step2: Establishing Objectives.
- Step three is brainstorming.
- Step 4: Evaluate Alternatives
- Step 5: Selecting a Solution
- Step 6: Active Implementation of the Selected Solution
- Step 7 is an evaluation.
Fearless problem solvers share five key characteristics: they are unafraid, optimistic, driven, smart, and empathetic.
Thus, the correct option is c, i.e., identifying the problem.
For more details regarding problem solving, visit:
#SPJ2
all planets look as though they lie along a flattened circular plane or disk
the Sun and planets rotate in the same direction
all moons orbit planets in a counterclockwise direction
Answers
Our solar system is made up of an ordinary star known as the Sun. All moons orbit planets in a counterclockwise direction are not one of the observed characteristics of our solarsystem.
What is the solar system?
Our solar system is made up of an ordinary star known as the sun, as well as the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
It contains the planets' satellites, as well as countless comets, asteroids, and meteoroids, as well as the interplanetarymedium.
When viewed from the Northpole or the North star Polaris, the Moon and all other typical non-asteroid size moons in our solar system orbit their host planet in a counter-clockwise manner.
To learn more about the solar system refer to the link;
The answer is: all moons orbit planets in a counterclockwise direction
b. False
Answers
Answer:
A. True
Explanation:
find the anguler momentum of a body if K.E = 4 jule and M.I = 2kg m2.
Answers
Answer:
KE = 1/2 I ω^2
Given I = 2 kg m^2 and KE = 4 J
ω = (2 KE / I)^1/2 = (2 * 4 / 2)^1/2 = 2^1/2 sec
P = I ω definition of angular momentum
P = 2 kg m^2 * (2 KE / I)^1/2 / sec = 2 * 2^1/2 kg m^2 / sec