Explanation:
The kinetic energy of a moving object is directly proportional to its mass and directly proportional to the square of its velocity. This means that an object with twice the mass and equal speed will have twice the kinetic energy while an object with equal mass and twice the speed will have quadruple the kinetic energy.
A 55.0 kg person, having a density of
1010 kg/m3, is underwater. What is the
buoyant force acting on the person?
[?]N
Pwater = 1,000 kg/m3
Answer:
534.7
Explanation:
55/1010 = 0.0545m^3
1000(0.0545)(9.81) = 534.7 N (kept at 4 sig figs)
Please answer correctly cause I am not really sure..
Is this statement true or false?
There are SEVEN days between a NEW MOON and a FIRST QUARTER MOON.
The full cycle of moon phases averages 29.531 days. A quarter of that is 7.38 days. So "7 days" is a pretty good approximation for casual conversation. It's true.
Answer:True
Explanation:
The full cycle of the moon is 29.631 or we could say 29.5 and the quarter is 7.34 I think so yes it’s true it’s appropriately a full average and if you subtract this two it true
Your friend says that if Newton’s third law is correct, no object would ever start moving. Here is his argument: You pull a sled exerting a 50 N force on it. According to Newton’s third law the sled exerts the force of 50 N on you in the opposite direction. The total force is zero, thus the sled should never start moving. But it does. Thus Newton’s third law is wrong. What is your opinion about this answer? How can you convince your friend of your opinion?
pls help
Answer:
Explanation:
You pull a sled exerting a 50 N force on it , sled also exerts a force on you . These forces are action and reaction force , as per third law of Newton . These two forces are equal and opposite . But they do not act on the same object so they do not cancel each other . They act on different objects , one on the sledge and the other on you . Due to force on sledge , sledge moves in the direction of force or towards you . You will start moving in opposite direction if frictional force of ground is nil or less .
Which equation is the slope-intercept form of this equation? y+8=4(x−3) 4x−y=−20 y+8=4x−12 y=4x−20 x=14y+5
Answer:
y=4x−20
Explanation:
The given equation is :
y+8=4(x−3)
Using distributive property at RHS.
y+8=4x−12
Taking variables to the one side and constant terms to another side.
y-4x = -12-8
y-4x=-20
or
y = 4x-20
Hence, the correct option is (c).
Complete the following table.
Answer:
Prats of the bicycle are a seat and tires
Simple Machines are brakes and a handler
A hot drink in a room is at a temperature of 20 C
What has happened to the drink after 10 minutes?
Answer: the drink cooled down to the same temperature as the room it was in.
Explanation: due to the change and temperature of the room, it cause the heat particles to exchange, causing it cool
In an inverse relationship, when one variable increases, the other___
Answer:
In an inverse relationship, when one variable increases, the other variable decreases.
Explanation:
Hope this helps! ^^
a body of mass 0.6kg is thrown vertically upward from the ground with a speed 20m/s. calculate potential energy at the maximum height reached
Answer:
120J
Explanation:
Given parameters:
Mass of the body = 0.6kg
Speed = 20m/s
Unknown:
Potential energy at maximum height = ?
Solution:
The potential energy at maximum height is equal to the kinetic energy that the body has gained.
Kinetic energy = [tex]\frac{1}{2}[/tex] mv²
Kinetic energy = [tex]\frac{1}{2}[/tex] x 0.6 x 20² = 120J
At the maximum height, the potential energy will be 120J
Where on the track would the cart have the most kinetic energy?
Group of answer choices
Position A
Position B
Position C
Position D
Answer:
Position C
Explanation:
Position A has the highest amount of potential energy. At position C, most of that potential energy was transformed to kinetic energy. Because it is at the bottom part of the hill, and is beginning to reclimb, point C has the highest kinetic energy.
The energy of the body by the virtue of its motion is known as the kinetic energy of the body. At position C on the track would the cart have the most kinetic energy.
What is kinetic energy?The energy of the body by the virtue of its motion is known as the kinetic energy of the body. It is defined as the product of half of mass and square of the velocity.
According to the law of conservation of energy can not be created nor be destroyed can be transferred from one form to another form.
The total energy is defined as the sum of kinetic energy and potential energy.
Total energy = kinetic energy+potential energy
Position A contains the most potential energy. The majority of that potential energy was converted to kinetic energy at location C.
Point C has the most kinetic energy since it is at the bottom of the slope and is starting to climb again.
Hence at position C on the track would the cart have the most kinetic energy.
To learn more about kinetic energy refer to the link;
brainly.com/question/999862
Two identical projectiles were projected at 200 km/h the first one is at an angle 60 to the horizontal while the second one is at angle of 60 to vertical which projectile reaches a greater horizonatal range
Answer:
The angle that will have the most range (Goes further) will be the one that is shot with 60 ° with the horizontal.
Since the one that shoots with respect to the vertical, it will only reach higher. And it won't go as far as the horizontal.
Greetings.
Danna.
How does the plastic become positively charged
how does the use of fertilizer affect the nitrogen cyle
Answer:
The nitrogen cycle is a natural process that adds nitrogen to the soil. However, the use of fertilizers has increased the amount of usable nitrogen in the soil. The extra nitrogen seems appealing from the agricultural viewpoint that more nutrients in the soil means higher yield crops...
thanks ❤Calculate kinetic energy of a 1.2 kg cart moving at 20.0 m/s.
Answer:
240 J :)
Explanation:
A crate of toys remains at rest on a sleigh as the sleigh is pulled up a hill with an increasing speed. The crate is not fastened down to the sleigh. What force is responsible for the crates increase in speed up the hill
Answer: the force of static friction of the sleigh on the crate
Explanation:
The force that is responsible for the crates increase in speed up the hill is the force of static friction of the sleigh on the crate.
When a light horizontal push is applied and which isn't enough to move the box, the static friction force will also be directly opposite to the push.
When an individual pushes harder, the force of the friction will then be enough to create a push.
A bus is moving with an acceleration of 4 m/s^2. If it was initially at rest,
what will be its speed at the end of 2 seconds? *
a) 8 m/s
b) 6 m/s
c) 2 m/s
d) 0.5 m/s
A person is standing on a raft; their
combined mass is 233 kg. What is the
volume of water displaced by the raft?
[?] m3
Pwater = 1,000 kg/m3
Answer:
The volume of water displaced by the raft is 0.233 m³
Explanation:
The question relates to Archimedes' principle which states that the buoyant force experienced by an object immersed in a fluid is equal to the weight of (the force of gravity on) the displaced fluid
The given parameters are;
The combined mass of the person and the raft, m = 233 kg
The liquid on which the raft is located = Water
The density of water, [tex]\rho _{water}[/tex] = 1000 kg/m³
Weight = Mass, m × g
Where;
m = The mass of the object
g = The acceleration due to gravity = 9.8 m/s²
Given that the raft is on the surface of the water (floating), the buoyant force is equal to the combined weight of the person and the raft = 233 kg
The combined weight of the person and the raft, [tex]W_{combined}[/tex] = 233 kg × 9.8 m/s² = 2,283.4 N
Therefore;
The buoyant force = 2,283.4 N = The weight of the water displaced
The mass of the water displaced, [tex]m_{water}[/tex], = 2,283.4 N/(9.8 m/s²) = 233 kg
Density = Mass/Volume
The volume of water displaced by the raft = The mass of the water displaced/(The density of the water) = 233 kg/(1,000 kg/m³) = 0.233 m³.
Answer:
the volume displaced by the raft = 0.233 m3
Explanation:
correct for Acellus
A car is traveling at 21m/s. It accelerates at 1.4m/s2 for 11s. How fast is the car moving after the acceleration?
Answer:
v=u+at
v=21+1.4(11)
v=21+15.4
v=36.4
Shawn uses 45 N of force to stop the cart 27 meter from running his foot over. How much work does he do?
Answer:
W=f×d
w=45×27
w=1215 j.............
why is it possible for iron ships to float o water,but needles sink when dropped in water
Explanation:
Needles sinks in water due to the more density of needles than the density of water. But ship is made hollow and contains air. So it's average density Is less than that of water. It displaces the liquid of it's own weight causing the ship to float on water.
So, it it possible for iron ships to float on water,but needles sink when dropped in water.
Hope it will help :)❤
If the captain of a ship observes that the star Polaris is 15° above the horizon, what is this ship's latitude?
A. 75° north
B. 15° north
C. 30° north
D. Unable to determine based on the information given
In your own words, why does a car have negative acceleration when it stops at a stop light
Answer:
Explanation:A driver slowing down to stop at a light is accelerating. ... acceleration is opposite to the motion, the speed of the object decreases. The car slows down. Slowing down is also called negative acceleration.
What happens to an object's mass as the object's acceleration increases but the force stays the same
Question 2 options:
°The mass increases
°The mass is zero
°The mass decreases
°The mass stays the same
⊃°ω°⊃
Answer:
the mass stays the same
Explanation:
the more mass the faster
Answer:
The mass stays the same
Explanation:
i had this question and got it right
help i need an explanation
Answer:
125.44 N
Explanation:
From the question given above, the following data were obtained:
Weight on earth = 784 N
Acceleration due to gravity of the moon (gₘ) = 1.6 m/s²
Weight on moon =?
Next, we shall determine the mass of the person. This can be obtained as follow:
Weight on earth (Wₑ) = 784 N
Acceleration due to gravity of earth (gₑ) = 10 m/s²
Mass (m) =?
Wₑ = m × gₑ
784 = mass × 10
Divide both side by 10
Mass = 784 / 10
Mass = 78.4 Kg
Finally, we shall determine the weight of the person on moon. This can be obtained as follow:
Mass (m) = constant = 78.4 Kg
Acceleration due to gravity of the moon (gₘ) = 1.6 m/s²
Weight on moon (Wₘ) =?
Wₘ = m × gₘ
Wₘ = 78.4 × 1.6
Wₘ = 125.44 N
Therefore, the weight of the person on moon is 125.44 N.
2. If, in the previous question, there is a 15 N kinetic frictional force opposing the motion, how much work is
done by the force of friction? Does friction do positive work or negative work on the block? Draw a free-body
diagram to support your answer.
Answer:
this answer your question
Fill in the blank for the following statement: Physical weathering is the ________.
Answer:
Breakdown of rocks
Hope this helps :)
Answer:
Disintegration of rocks without chemical change.
Which planet in our solar system is considered the most thoroughly studied?
1. Mars
2. Pluto
3. Venus
4. Jupiter
Answer:
Mars
Explanation: Because we have sent a actual robot there to gather intel
Why cloth and leather are used to make safety clothing for people who work with heat. A.they are both good sources of heat. B they both can produce electrical energy C they both can absorb light energy. D they are both poor conductors of heat
Answer:
D
Explanation:
they are both poor conductors of heat so that people who works with heat won't get affected by heat
Jin is standing still and watching an archer on a horse traveling away from a target. The archer is moving at a speed of 4 m/s and shoots the arrow toward the target with a speed of 17 m/s. Which statement is supported by this scenario?
-For Jin, the speed of the arrow is 21 m/s, and for the archer, the speed of the arrow is 4 m/s.
-For Jin, the speed of the arrow is 13 m/s, and for the archer, the speed of the arrow is 17 m/s.
-For both Jin and the archer, the speed of the arrow is 21 m/s.
-For both Jin and the archer, the speed of the arrow is 17 m/s.
Answer:
For Jin, the speed of the arrow is 13 m/s, and for the archer, the speed of the arrow is 17 m/s.
Explanation:
EDGE2020 :)
B
Answer:
B.
Explanation:
Edge 2021
10)
The population of humans living on the Earth has increased tremendously due to scientific discoveries and technology. Which
statement BEST summarizes how science and technology have contributed to human population growth?
A)
Science and technology have increased the human birth rate.
B)
Science and technology have been crucial in opening up new areas for
human development.
Science and technology have allowed for an increased emphasis on
education and the arts.
C)
D)
Science and technology have increased food and reduced death rates due
to illness and malnutrition.
The correct answer would be
D. Science and technology have increased food and reduced death rates due to illness and malnutrition.
I took this on USATestPrep, it's 100% right
How long would it take a 400 W motor to transfer 2000 J of energy
5s
50s
0.2s
0.02s
Answer:
it's answer is 5 seconds,
Explanation:
Given
Power (p) = 400 watt
work (w) = 2000 J
time taken (t) = ?
we know that,
p = w/t
400 = 2000 / t
t = 2000/400
Therefore t = 5 sec