Answer:
Plate tectonics is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of Earth's lithosphere, since tectonic processes began on Earth between 3.3 and 3.5 billion years ago
Hello anyone I need the answer to this, thank you!
Answer:
yes
yes yes yes yes
yes yes yes
Sam, whose mass is 60 Kg, is riding on a 5.0 kg sled initially traveling at 8.0 m/s. He
brings the sled to a stop in 4.0 seconds. What amount of force is applied to the sled in
bringing it to a stop?
===============================================================
Explanation:
We'll need the acceleration first.
The initial speed (let's call that Vi) is 8.0 m/sThe final speed (Vf) is 0 m/s since Sam comes to a complete stop at the end.This happens over a duration of t = 4.0 secondsThe acceleration is equal to the change in speed over change in time
a = acceleration
a = (change in speed)/(change in time)
a = (Vf - Vi)/(4 seconds)
a = (0 - 8.0)/4
a = -8/4
a = -2
The acceleration is -2 m/s^2, meaning that Sam slows down by 2 m/s every second. Negative accelerations are often associated with slowing down. The term "deceleration" can be used here.
Here's a further break down of Sam's speeds at the four points of interest
At 0 seconds, he's going 8 m/sAt the 1 second mark, he's slowing down to 8-2 = 6 m/sAt the 2 second mark, he's now at 6-2 = 4 m/sAt the 3 second mark, he's at 4-2 = 2 m/sFinally, at the 4 second mark, he's at 2-2 = 0 m/sNext, we'll apply Newton's Second Law of motion
F = m*a
where,
F = force appliedm = massa = accelerationWe just found the acceleration, and the mass is fairly easy as all we need to do is add Sam's mass with the sled's mass to get 60+5.0 = 65 kg
So the force applied must be:
F = m*a
F = 65*(-2)
F = -130 newtons
This force is negative to indicate it's pushing against the sled's momentum to slow Sam down.
The magnitude of this force is |F| = |-130| = 130 newtons
Explain how the readings on both meters change when the environmental conditions change.
Help please :'0
Answer:
* Temperature changes
* Changes in the tension
* Errors in the meter marks
Explanation:
When we are using several meters to make a measurement we have several aspects that can cause the readings to differ.
* Temperature changes make the dilation between readings different, at higher temperatures the material of the meter expands and the reading decreases.
* Changes in the tension with which the meter is pulled to keep it straight, in general all materials bend under the action of gravity, so you have to pull them to make them straight, if the forces are different from the material is lengthened decide Young's modulus, inducing different readings
* Errors in the meter marks, especially in the initial part that is covered by a hook, different positions of the hook change the readings.
* Structural problems, such as rust, bends that create changes in the length of the meter material.
A 6kg bowling ball is rolled down the bowling lane with a force of 42N, what is the acceleration of the ball?
Answer:
7 m/s²
Explanation:
F= ma
A= F/m = 42/6 = 7 m/s²
the total amount of energetic does not change. this is known as the principle of (blank) energy
Answer:
Conservation
Explanation:
An object’s momentum includes its __________.
Answer: Momentum can be defined as "mass in motion
Explanation:
is an increase in speed in a certain time .
a. Acceleration
b. ActionReaction Pairs
c. Force
d. Inertia
It's Acceleration
We can calculate the average speed by finding the total distance traveled divided by the elapsed time: Average speed=–s=Total distanceElapsed time. Average speed = s – = Total distance Elapsed time.
_____ is a area of darkness
Answer:
Shadow
Explanation:
Shadow is a area of darkness.
When sunlight falls on an object ot blocks the light from getting onto the surface . Hence, as light does not falls on that region it is dark. Hence, the shadow is the area of darkness.
Answer:
shadow is a area of darkness
Which of the following statements is NOT true about chemical reactions?
A. A chemical reaction produces new substances with different properties.
B. Chemical reactions result in products that have characteristics that are not the same as the reactants.
C. During chemical reactions, chemical bonds break and/or new bonds form.
D. When a chemical reaction releases energy, it is an example of an endothermic reaction.
Answer:
D. When a chemical reaction releases energy, it is an example of an endothermic reaction.
Explanation:
"Endo" means within. Therefore, an endothermic reaction releasing energy makes no sense.
p.s.
I owe you for your help.
Thank you so much!
The statement that is not true about the chemical reaction is when a chemical reaction releases energy, it is an example of an endothermic reaction, therefore the correct answer is option D.
What is a chemical reaction?A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products.
A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Substances with novel characteristics are created through chemical reactions.
Products of chemical reactions differ from the reactants in terms of their features.
Chemical bonds may break or produce new ones during interactions.
The excess energy is released during an exothermic reaction, making the potential energy of the reactant higher than the potential energy of the product. The right response is D.
To learn more about chemical reactions, refer to the link;
brainly.com/question/22817140
#SPJ2
i need help it is psychology
Answer:
C. Forebrain
Explanation:
The Basil Ganglia, sits on the base of the forebrain.
Which planet has the least gravitational pull?
Answer:
Mercury
Explanation:
How are the sun and Earth's moon different?(2 points)
The sun is a ball of gases that revolves around Earth, while the moon is the center of the solar system,
The sun is a ball of rock and gas, while the moon is a ball of rock that revolves around the sun.
The sun is the center of the solar system, while the moon is a ball of rock that revolves around Earth
The moon is the center of the solar system, while the sun is the center of the Milky Way.
Answer: The Sun measures 1.4 million km across, while the Moon is a mere 3,474 km across. In other words, the Sun is roughly 400 times larger than the Moon. But the Sun also happens to be 400 times further away than the Moon, and this has created an amazing coincidence.
Explanation:
A 100-newton object is lifted 100 meters in 100 seconds. What is the
power generated in this situation?
Which type of coolant(s) usually is (are) used to remove heat from a nuclear reactor core?
a.
water only
c.
liquid sodium or water
b.
liquid sodium only
d.
CFCs
Answer:
(B). Liquid sodium or water
Explanation:
I don't know how to explain this But hope it right!
If I'm wrong I'm sorry
If I'm right Thank you and (brainliest plz)
1. Choose the statement that does not accurately describe observations
Answer:What are the statements?
Explanation:
Answer:
obtuse, oblique, unaware, over stimulate, distracted, undrewhelmed...
An 850 kg elevator is accelerating upwards at 3.0 m/s2. Calculate the tension in the cable.
Answer:
10880N
Explanation:
We are given that
Mass of elevator, m=850 kg
Acceleration, [tex]a=3m/s^2[/tex]
[tex]g=9.8m/s^2[/tex]
We have to find the tension in the cable.
We know that
When elevator is accelerating upward then tension in the cable
[tex]T=m(a+g)[/tex]
Using the formula
[tex]T=850(3+9.8)[/tex]
[tex]T=10880N[/tex]
A dog runs down his driveway with an initial speed of 5.0 m/s for 8 seconds then uniformly increases his speed to 10 m/s in 5 seconds, how long is the driveway? SHOW WORK
Answer:
to find the displacement, or delta x (change in position) on a velocity graph, you can find the area under the line on the graph: between 1 and 8 seconds, the dog was going at 5m/s, so 5m/s x 8s=40m, for the second part, you have to find the area of both a triangle and a rectangle, so the rectangle would be 5m/s x 5s=25m and the area under the triangle would be (5m/s x 5s)/2=25m/2=12.5m -you divide by 2 because it's a triangle
-afterwards, you would add the area of the 2 sections together, so 40m+25m+12.5m=77.5m
Explanation:
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Answer:A
Explanation:
It’s bigger I am not sure
Answer:
For the first question, the answer is
B. Kettle
Unlike Electromagnetic waves, Mechanical waves need a to
transfer energy
Plzzz help. Will give branliest.
Why should experiments be replicable?
A. So that the materials used can be validated.
B. So that scientists can gain popularity in the community.
C. So that fewer errors will be made and the data appear to be more correct.
D. So that others can repeat experiment and obtain similar results.
D. So the scientists can repeat the same experiment and get the same or similar results.
Answer:
C
Explanation:
What was an ill effect of the industrial revolution?
A)air pollution
B)crowded and unhealthy conduction in cities
C)child labor
D)all of the above
Answer:
answer is option (c) child labour
What type of wave is this. I can figure it out
lab number 14: sudden stops hurt newtons first law
Answer:
you want to know newtons first law here.
Explanation:
An object that is at rest stays at rest or stays in motion.
A 10 kg boat is moving 3 m/s. Find kinetic energy. Use KE = (mv^2)/2
2x+1-2x=8. solve this problem math
Answer:
x=7
Explanation:
2x+1-2x=8
or,2x-2x=8-1
x=7
2.2 State the dependent variable.
Answer:
The dependent variable is the variable being tested and measured in an experiment, and is 'dependent' on the independent variable. An example of a dependent variable is depression symptoms, which depends on the independent variable
Explanation:
I HOPE FOR A GOOD RESPONSE
HAVE A NICE DAY
White light is an _____________ mixture of all the colors.
a) observable b) unequal c) equal
Answer:
unequal
Explanation:
White light is a combination of all colors in the color spectrum.
Answer: C) equal
If you use a glass prism, you can split white light into a rainbow which shows all of the colors along a spectrum. Each little color slice is the same width. In other words, something like green doesn't dominate the spectrum and take up a wider portion compared to other colors.
pls help i’ll give brainliest if you give a correct answer!!
Answer:
the applied force is greater than the force of friction
Explanation:
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Answer:
hi!
Explanation:
The answer is option b.
A box can definitely not move on it's own unless an external force is applied i.e muscular force. If the applied force would have been less than the force of friction then the box would have never displaced. But, since the box is able to move, we can imply that, the applied force is greater than the frictonal force leading in the displacement of the box.
Wave Properties
With the help of their science teacher, Kaden and Mariam made a machine that can move a slinky back and forth. This motion
creates a fast-moving wave in the slinky. The image below is a model of a wave that is generated by the machine. The frequency of
the wave modeled in the image is 4 Hz.
3 m
What is the speed of the wave?
OA. 24 m/s
ОВ.
1.25 m/s
OC.
0.75 m/s
OD
12 m/s
the wave has a speed of 12 m/s.
Explanation:
Speed is directly proportional to wavelength and frequency. The wave has a frequency of 4 Hz. One Hertz (Hz) is equal to one cycle per second. The image shows that the wave has a wavelength of 3 m. Using the given speed and frequency, the wavelength can be calculated as shown below.
speed= wave length x frequency
speed = 3m x 4Hz
speed = 12m m/6
DEFINE KINETIC ENERGY AND PATAINTIA ENERGY please
Answer:
1. Kinetic energy is the energy possessed by a body due to its motion. Potential energy is the energy possessed by a body due to its position or state. Kinetic energy can be transferred from one object to another, in case of collisions. Potential energy cannot be transferred. Thus, the potential energy is stored in the object due to its position, whereas the kinetic energy is possessed by an object due to motion.
Eg: A ball kept on the edge of the table possesses potential energy due to its height, whereas a ball falling down from the table will possess kinetic energy due to its motion.
2. The formula for Kinetic energy is as below: This means that kinetic energy is directly proportional to mass as well as velocity. But it is proportional to 1 unit of mass and a square of velocity. Hence, velocity has a greater effect on kinetic energy.…show more content…
3. The equation for kinetic energy is: .
Let’s calculate the kinetic energy of a 40 kg object traveling 15 m/s.
Solution: mass= 40kg, velocity= 15 m/s, so putting these numbers into the kinetic energy equation,
Now, let’s calculate the kinetic energy of a 40 kg object traveling 30 m/s.
Solution: mass= 40kg, velocity= 30 m/s, so putting these numbers into the kinetic energy equation, Thus, when we double the velocity of an object, its kinetic energy increases by four times. Hence the velocity of an object has more impact on kinetic energy than the mass of an object.
Explanation:
