Answer:
2.41m/s
Explanation:
Given parameters:
Initial velocity = 1.5m/s
Acceleration = 0.275m/s²
Distance = 6.45m
Unknown:
Final velocity = ?
Solution:
To solve this problem, we apply the kinematics equation below:
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the acceleration
S is the distance
v² = 1.5² + (2 x 0.275 x 6.45)
v = 2.41m/s
If an object is not moving, does that mean there are no forces acting up on it? Why or why not?
Answer:
If an object is at rest, then there are no forces acting upon the object.
Explanation:
It would take an unbalanced force to keep an object in motion at a constant velocity. It is the natural tendency of all objects to eventually come to a rest position.
What is the momentum of a 1.5 * 10 ^ 3 - kil kilogram car as it travels at 30. meters per second due east for 60. seconds ?
Answer:
45000kgm/s due east
Explanation:
Given parameters:
Mass of the car = 1.5 x 10³kg
Velocity = 30m/s
Time taken = 60s
Unknown:
Momentum = ?
Solution:
Momentum is the quantity of motion a body possess,
Momentum = mass x velocity
So;
Momentum = 1.5 x 10³ x 30 = 45000kgm/s due east
Which of these should be avoided in order to prevent heart diseases and disorders?
yoga and meditation
fruits and vegetables
drugs and alcohol
jogging and skating
Answer:
drugs and alcohol
Explanation:
All the others will help your body, while drugs and alcohol will only harm it .
Answer:
drugs and alcohol
Explanation:
because drugs and alchol isnt healty for your body and it causes diseases .
A 60-kg skate boarder is standing on his stationary board. A bigger, out of control 75-kg skate boarder crashes into him with a velocity of 4 m/s. Their boards get stuck together in this inelastic collision. How fast are the moving after the collision?
Answer:
2.22m/s
Explanation:
Given parameters:
M1 = 60kg
M2 = 75kg
V1 = 0m/s
V2 = 4m/s
Unknown;
Velocity after collision = ?
Solution:
To solve this problem, we must understand that the momentum before and after collision of the bodies must be the same;
M1 V1 + M2 V2 = v(M1 + M2)
So;
60 x 0 + 75 x 4 = v (60 +75)
300 = 135v
v = 2.22m/s
Which is a statement of the law of conservation of mass? The total mass before a chemical reaction is the same as the total mass after the reaction. O Mass can be created or destroyed in a reaction. The total amount of mass is equal to the volume of both chemicals in the reaction. Every reaction creates an equal amount of mass related to the amount of energy required for the reaction.
Answer:
Every reaction creates an equal amount of mass related to the amount of
energy required for the reaction.
b. The total mass before a chemical reaction is the same as the total mass after
the reaction.
c. Matter can not be conserved.
d. The total amount of mass is equal to the volume of both chemicals in the
reaction.
Kinetic Friction force is always less than Static Friction force.
True
False
Answer and I will give you brainiliest
heeeeelp please
Answer:
true
Explanation:
because u will use more force to start an object rather than to push moving object
Hey, I need help can someone help me out, please?
Explanation:
6) newton
7) f =ma = 15*15 = 225N
8) a= 100/20 = 5ms^-2
Answer:
6 newton
7) f =ma = 15*15 = 225N
8) a= 100/20 = 5ms^-2
Explanation:
this is right pls mark as brainliest
In the diagram, the Sun, Earth, and Moon are in perfect alignment. Which two conclusions can be drawn based on the diagram?
a diagram showing Earth between the Sun and Moon and casting a shadow on the Moon; Remove the text "Figure 1" and use upper and lower text: Sun, Earth, Moon, Earth's shadow. (MORE THAN 1 ANSWER)
An observer on the Moon sees a solar eclipse.
An observer on the Moon sees a lunar eclipse.
An observer on the Moon sees a partial eclipse.
An observer on Earth sees a lunar eclipse.
An observer on Earth sees a solar eclipse.
Answer:
I know one answer is an observer on earth sees a lunar eclipse
Answer:An observer on the Moon sees a solar eclipse. and An observer on Earth sees a lunar eclipse.
Explanation:from the moon the sun is completly if not just mostly invisible(solar eclipse) and from earth the moon would be in lunar eclipse from the earth blocking the sun.
A planet with half Earth’s mass and half Earth’s radius is discovered. What would an astronaut who weighs 800 N on Earth weigh on the planet?
Let,
The mass of planet, [tex]M' = \frac{1}{2} M_\bigoplus[/tex]The radius of planet, [tex]R = \frac{1}{2} R_\bigoplus[/tex]here,
[tex]M_\bigoplus[/tex] = Mass of earth[tex]R_\bigoplus[/tex] = Radius of earthNow,
The gravitational acceleration of the planet will be:
→ [tex]g' = \frac{GM'}{R^2}[/tex]
[tex]= \frac{2G M_\bigoplus }{R_\bigoplus ^2}[/tex]
[tex]= 2g[/tex]
hence,
The weight will be:
= [tex]2\times 800[/tex]
= [tex]1600 \ N[/tex]
Thus the above answer is appropriate.
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Question 6 / 6
When you visited that last website, there were two animations. What was the unbalanced force in the animation with the skateboarder?
A. The skateboard
B. The rock in the road
C. The skateboarder
How does the force of the car change as the mass of the car is increased?
yes
Explanation:
because if a car is 100 pounds then it will have less force than a 250 pound car
Please help ASAP I will mark brainliest
Answer:
arrow c tell me if im incorect
Explanation:
Which of the following elements has a mass number of 19 and contains 10 neutrons?
A. potassium (K)
B. neon (Ne)
O c. fluorine (F)
D. copper (Cu)
Which of the following would have the least impact on physical health?
o communicating well with others
getting plenty of rest
taking part in regular physical activity
O making responsible choices
Is soil a product of photosynthesis?
Answer:
yes
Explanation:
The plants use water (H2O) from the soil and carbon dioxide (CO2) from the air and recombine them to form carbohydrates (CH2O) and oxygen (O2).
How is a coil of current carrying wire similar to a bar magnet
Answer:
When an electric current flows, the shape of the magnetic field is very similar to the field of a bar magnet
Explanation:
Why losing is an important aspects of sports
Answer:
It reminds us that we need to work harder. It allows us to make adjustments in the way and manner in which we train and practice. In a loss, we are able to identify our vulnerabilities and weaknesses, and work to improve.
Explanation:
can somewon help me with this qustion?
You want to calculate how long it takes a ball to fall to the ground from a height of 20 m. Which equation can you use to calculate the time? (Assume no air resistance.)
Answer:it’s B.
Because it’s said in the fhoto
What is the period of a wave that has a frequency of 3 Hz?
A. 30 s
B. 0.3 s
C. 300 S
D. 3 S
Answer:
B.) 0.3s
Explanation:
The period of a wave that has a frequency of 3 Hz is 0.3s. Hence option B is correct.
What is wave ?Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.
Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.
There are two types of the wave longitudinal wave and transverse wave.
Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave. Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a transverse wave.
Time period of the wave is inverse to the frequency of the wave.
T = 1/f
T = 1/3
T = 0.333 s
Hence option B is correct.
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You walk across a carpet and you end up negatively charged. Explain how this happens
Answer:
it transfers to other objects so as time goes on it becomes negative
Explanation:
In other words, the carpet took the charge from your socks
Which does NOT affect how much a building shakes in an earthquake?
*If it is on soft sediment or hard rock.
*How close it is to the fault.
*If it is in a valley or on a hill.
*The weather.
*How the building is constructed.
Which descriptions apply to Mendels pea plant experiments ? Select three options
used cross breeding to purposely breed plan
studied a variety of pea plant traits
studied several generations of plants
In order to breed or cross one plant with another, Mendel opened the petals and removed the anthers from the flower and dusted the pistil with pollen from the plant he wished to cross it with and covered the flower with a small bag to prevent the pollen in the air from landing in the pistil. This process is called cross pollination.
Mendel considered 7 characters of pea plant for his study and did the study for several generations.
How is an object’s position in the solar system affect its motion and temperature?
Answer:
it will be base on the climate change.
Explanation: so let just say tomorrow it will be cold so the atmosphere will circle on the coolest atmosphere away from the sun.
An object's position in the solar system affects both its motion and temperature. Objects closer to the Sun experience a stronger gravitational force, causing faster or slower orbits. Other planets and moons also influence an object's orbit and speed. Objects closer to the Sun receive more solar radiation and are hotter, while those farther away receive less radiation and are colder. Additionally, the composition of an object's surface can affect its temperature.
What is the solar system?The solar system refers to the group of celestial bodies that orbit around the Sun, including planets, dwarf planets, moons, asteroids, comets, and other small bodies. It is located in the Milky Way galaxy and spans a distance of about 4.6 billion years in age. The eight planets in the solar system, in order from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The solar system is held together by the gravitational force of the Sun and is a subject of scientific study to understand the formation and evolution of our own planet and the other bodies in the solar system.
Here in the Question,
An object's position in the solar system can affect both its motion and temperature. Here's how:
Motion: The motion of an object in the solar system is affected by its distance from the Sun and the gravitational forces of other celestial bodies. An object closer to the Sun will experience a stronger gravitational force than an object farther away. This can cause the object's orbit to be faster or slower depending on its position. Additionally, the gravitational pull of other planets and moons can affect the object's orbit and speed.
Temperature: An object's temperature in the solar system is affected by its distance from the Sun and the composition of its surface. Objects closer to the Sun receive more solar radiation and thus have a higher temperature. Objects farther away receive less radiation and are colder. Additionally, the composition of the object's surface can affect its temperature. For example, objects with high albedo (reflectivity) will reflect more solar radiation and have a lower temperature than objects with low albedo.
Therefore, an object's position in the solar system has a significant impact on its motion and temperature. By studying the positions of celestial bodies and their effects on each other, scientists can gain a better understanding of the dynamics of the solar system and the properties of objects within it.
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7. How much energy is stored in a rubberband that is stretched 0.5 meters if the
spring coefficient of the rubberband is 2.2 N/m?*
Answer?
Answer:
0.275J
Explanation:
Given parameters:
Extension = 0.5m
Spring coefficient = 2.2N/m
Unknown:
Energy stored in the rubberband = ?
Solution:
The elastic potential energy is given as:
Elastic potential energy = [tex]\frac{1}{2}[/tex] k e²
k is the spring constant
e is the extension
Elastic potential energy = [tex]\frac{1}{2}[/tex] x 2.2 x 0.5² = 0.275J
An airplanes velocity has an x-component of -155 mph and a y-component of -45 mph. What are the magnitude and direction of the plane's velocity
Answer:
161.4 mph due southwest
A scientist studies what makes leaves fall off trees. Which of the following is
a testable question about this topic?
A. Do leaves still look beautiful once they reach the ground?
B. Should people be allowed to burn leaves?
C. Are trees an interesting topic to study?
D. Do stronger winds make more leaves fall?
SUBMIT
Answer:
A.
Explanation:
During the fall the day gets shorter hence less sunlight this results to leaves stopping their food making process. The chlorophyll breaks down, the green color disappears and the yellow to orange color becomes visible
A 5Kg ball rolling to the right at a velocity of 5m/s hits a stationary 10Kg ball. It is an elastic collision and the final velocity of the 5Kg ball is 0m/s. What is the final velocity of the 10Kg ball?
Answer:
magnitude of v = 2.5 m/s, and in the same direction as the initial velocity of the 5 kg ball.
Explanation:
We use conservation of linear momentum in an elastic collision to solve for the unknown velocity v:
Pi = Pf
5 kg * 5 m/s + 10 kg * 0 m/s = 5 kg * 0 m/s + 10 kg * v
25 kg m/s = 10 kg * v
v = 25/10 m/s
v = 2.5 m/s
and in the same direction as the initial velocity of the 5 kg ball.
explain the law of conversion of energy with an example and explain it
Energy can neither be created nor destroyed. It can be converted from one form to another. The total energy before and after conversion remains the same. The Law of Conservation of Energy is universal.
The law of energy conservation says that energy can be transformed from one type to another type, for example, if a ball is thrown upward the kinetic energy as the ball goes upward decreases, and the potential energy increases.
What is the conversion of energy?Energy conversion is the process by which energy is changed from forms supplied by nature to forms used by people.
For this goal, a huge variety of tools and systems have been created over the years. A few of these energy converters are really straightforward. Early windmills, for instance, used wind's kinetic energy to drive machinery that pumped water and ground grain.
A body's kinetic energy was thought to be transformed into potential energy as it slowed down while moving upward against the pull of gravity.
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A 2000 Kg car is driving 15 m/s. It drives head-on into a giant spring attached
to a brick wall. The spring compresses 8 meters after the impact. What is the
spring coefficient of the giant spring? *
Answer:
The spring constant is k=7031.25
Explanation:
We start by using the conservation of mechanical energy:
Ui + Ki = Uf + Kf
the Ui (initial potential energy) is zero since the spring is relaxed.
In the final situation, the Kf (final kinetic energy is zero since the car and spring are NOT in motion)
Then we have:
[tex]K_i=U_f\\\frac{1}{2} m*v^2=\frac{1}{2} k*(\Delta x)^2\\\frac{1}{2} 2000*15^2=\frac{1}{2} k*(8)^2\\k=7031.25[/tex]