Answer:
60 seconds
Explanation:
bxdnfjrjrjjrjrjrj
What is the efficiency of a ramp if 2,000 joules of energy results in 1.200 joules of work? (1 point)
O 32%
O 80%
60%
0 24%
[tex]\boxed{\sf Efficiency=\dfrac{E}{∆E}\times 100}[/tex]
[tex]\\ \sf\longmapsto Efficiency=\dfrac{1200}{2000}\times 100[/tex]
[tex]\\ \sf\longmapsto Efficiency=\dfrac{3}{5}\times 100[/tex]
[tex]\\ \sf\longmapsto Efficiency=60\%[/tex]
What is the density of the football in g/cm
Answer: see below.
Explanation:
Your question is lacking the necessary parameters, so I will assume the values to enable me to solve it:
Mass of football = 20 grams
Volume of football = 100[tex]cm^{3}[/tex]
To find the density of the football;
Density is simply mass per unit volume of an object such as a football.
Mathematically, the density of an object is given by the formula;
Density=[tex]\frac{Mass}{Volume}[/tex]
Substituting the assumed values into the above formula;
Density=[tex]\frac{20}{100}[/tex]
Density= 0.2g/[tex]cm^{3}[/tex]
Therefore, the density of the football is 0.2g/[tex]cm^{3}[/tex] .
For you: You can substitute the appropriate parameters into the formula to get the exact density of the ball.
Explain why a clothes iron with a metal base must be connected to the mains by a three-core cable.
The earth connection is because the earth connection(third cable) helps to prevent the casing from turning into a live wire.
What are the three cables?It is normal to find that the cable that is used in the pressing iron has three wires that connect to live, neutral and earth. The earth connection is very important in the pressing iron.
The reason why we ought to have the earth connection is because the earth connection helps to prevent the casing from turning into a live wire.
Learn more about pressing iron:https://brainly.com/question/9664475?
#SPJ9
What is the weight force of a 10 kg object on the sun? (The sun's acceleration due to gravity is 275 m/s^2)?
Answer:
f=mass × acceleration
f=10×275
f=2750N
Explanation:
PLS MARK BRAINLIEST
Which statement best describes the air in Earth's atmosphere?
- a pure substance made of one kind of gas
- a solution of gases that are physically mixed
- a compound made of two or more kinds of gases
- a mixture of two gases that are chemically combined
Explanation:
Please Tell me About this question if you know que is transformer is used in rectifier to step up or step down voltage?
Biểu diễn những lực sau đây:
a. Trọng lực của một vật 300N ( tỉ xích 0.5cm ứng với 50N )
b. Lực kéo tác dụng vào điểm A của một vật có độ lớn 1500N theo phương nằm ngang, chiều từ trái sang phải ( 1cm ứng với 500N )
Answer:
Explanation: HIII
If the distance between the first and the ninth crests in a string is 320 cm on the way velocity is 8 m/s calculate the periodic time
Áp dụng công thức tính bước sóng nhé
can i get help with this worksheet
Answer:
hi uv f hmm k in vyvj
Explanation:
hujjkiv ghujihtnkbggvhbbbnnjnj
I will give brainliest
Which option works similarly to an ultrasound scanner?
O A. Echo
O B. Hand lens
O C. Rainbow
O D. Shadow
Answer:
A. an echo works similarly with an ultrasound scanner cos they both refract sound
Explanation:
hope it helps
Answer:
A. Echo
Explanation:
I took the quiz and got it right
leftover planetesimals that formed inside the frost line are known as
These are known as dwarf planets.
help2$2$28/?$3!32$?3)3
1. Which of the following does not play a role in convection in the mantle?
A. gravity
B. temperature
C. density
D. magnetism
Answer:
Magnetism
Explanation:
I NEED THE RIGHT ANSWER ASAP IT NEEDS TO BE 100% ACCURATE NO LINKS !!!
Which statement about vectors is true?
1:Vectors are quantities described by both velocity and acceleration.
2: Vectors are quantities described by both magnitude and direction.
3: Vectors are quantities described by both speed and movement.
4: Vectors are quantities described by both force and gravity.
Answer:
I will answer before the bot in comments
why are protons and electrons attracted to each other
Answer:
electrons have a negative charge, while protons have a positive charge
Explanation:
In science "opposites attract"
If a truck starts from rest and it has acceleration of 4 m/s for 5 second calculate its final velocity. What will be the distance travelled by the truck during the time interval?
Answer:
20m/s final velocity, 60meters is the distance
Explanation:
since it accelerates 4m/s we can assume every second it goes up by 4 so we do 5×4=20...
while for the distance we have to think about the fact that every second the speed changes (precisely every second adding 4m/s) so in the first second its going to travel 4 meters in the second 8m in the third 12m in the fourth 16m and in the fifth 20m... so we just calculate them for addition and get 60 meters
Let’s say someone drops to Waterman off a skyscraper. The second watermelon is released 1s after The first watermelon. Will the vertical distance between the watermelons always be the same
Answer:
Yes
Explanation:
They will reach the ground right after each other.
can someone help please
Hi there!
We know that:
Potential energy = mgh, where:
m = mass
g = acceleration due to gravity
h = height
We know that ΔPE = mgΔh = 1.47 kJ, so:
1.47kJ = mgΔh
Remember to convert kJ to J for simplicity: (1 kJ = 1000J)
1470J = mgΔh
Rearrange to solve for Δh:
1470/mg = Δh
1470/(60 · 9.8) = 2.5m
What is the mass of an object if it accelerates at 3 m/s? and has a force of
1 N?
Answer:
1 / 3 or 0.33
that is if you meant that the object accelerates at 3 m / s² not 3 m / s
for the unit of acceleration is m / s²
Explanation:
m = ?
a = 3
f = 1N
where;
m = mass ( kg )
a = acceleration ( m / s² )
f = force ( N )
from all the parameters we are given, we can use Newton's second law of motion to solve it
that is;
a = f / m
to make m the subject of the formula, we have to cross multiply to give us;
m( a ) = f
divide through by a to give us;
m ( a ) / a = f / a
therefore,
m = f / a
so, we substitute our values to give us;
m = 1 / 3
therefore. m = 1 / 3 or 0. 33
hope this helps
thank you!!!!
calculate the work done by a girl of mass 40 kg when she climbs a stair case of 20 steps each of height 10 cm and acceleration is 10Nkg^-1
Answer:
i think its a 800x² hope you like it
Answer:
8964
Explanation:
465
the perimeter of a rectangle is 28 inches if the width of the rectangle is 7 inches what is the length
A 1.11 kg ball sits at rest on a table 1.72 m above the ground. What is the potential energy of the ball?
Answer:
18.71 joules
Explanation:
The formula to solve for potential energy is PE = mgh
where m = mass, g = force of gravity, and h = height.
m = 1.11 kg
g = 9.8 m/s^2
h = 1.72 meters
PE = (1.11)(9.8)(1.72)
PE = 18.71016
Therefore, the potential energy of the ball is 18.71 joules.
Answer:
The formula to solve for potential energy is PE = mgh
where m = mass, g = force of gravity, and h = height.
m = 1.11 kg
g = 9.8 m/s^2
h = 1.72 meters
PE = (1.11)(9.8)(1.72)
PE = 18.71016
Therefore, the potential energy of the ball is 18.71 joules.
A tennis ball is tossed upward with a speed of 3.0 m/s. We can ignore air resistance.
What is the velocity of the ball 0.40 s after the toss?
Answer: Hello, The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).
Explanation: The equation for the velocity of an object thrown upward is the following:
v = v0 + g · t
Where:
v = velocity of the ball.
v0 = initial velocity.
g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).
t = time.
To find the velocity of the ball at t = 0.40 s, we have to replace "t" by 0.40 s in the equation:
v = v0 + g · t
v = 3.0 m/s - 9.8 m/s² · 0.40 s
v = -0.92 m/s
The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).
Hope That Helps
напряженность поля в некоторой точке 0,8 кН/кл определите величину силы,с которой поле будет в этой точке действовать на заряд 2,5мкКл
Answer:
напряженность поля в некоторой точке 0,8 кН/кл определите величину силы,с которой поле будет в этой точке действовать на заряд 2,5мкКл 00
Conservation of Momentum
No one likes you little trolls please send an actual answer
Hello!
This is an example of an inelastic collision, where the two objects "stick" to each other after their collision. (The Goalkeeper CATCHES the puck).
We can write out the conservation of momentum formula:
m1vi + m2vi = m1vf + m2vf
Let:
m1 = mass of puck
m2 = mass of the goalkeeper
We know that the initial velocity of the goalkeeper is 0, so:
m1vi + m2(0) = m1vf + m2vf
m1vi = m1vf + m2vf
The final velocities will be the same, so:
m1vi = (m1 + m2)vf
Plug in the given values:
(0.16)(40)/ (0.16 + 120) = vf ≈ 0.0533 m/s
Using the equation for momentum:
p = mv
The object with the LARGER mass will have the greater momentum. Thus, the Goalkeeper has the largest momentum as p = mv; a greater mass correlates to a greater momentum since the velocity is the same between the two objects. The puck would have a momentum of p = (.16)(0.0533) = 0.008528 kgm/s, whereas the goalkeeper would have a momentum of
p = (120)(0.0533) = 6.396 kgm/s.
bus slows down uniformly from 21 m/s to 0 m/s in 21 s. How far does it travel before stopping?
Answer:
1 hour = 3,600 seconds
1 km = 1,000 meters
75 km/hour = (75,000/3,600) m/s = 20-5/6 m/s
The average speed of the bus while it slows down is
(1/2)(20-5/6 + 0) = 10-5/12 m/s .
Traveling at an average of 10-5/12 m/s for 21 seconds,
the bus covers
(10-5/12) x (21) = 218.75 meters .
do not own the answer
answer by (AL2006 from brainly)
A car starts from rest and retains the acceleration of 4m/s² in 20 second. calculate its final velocity.
step by step
Answer:
80m/s
Explanation:
[tex](acceleration)= \frac{(change \: in \: velocity)}{(change \: in \: time)}[/tex]
4 = v/20
V = 4 * 20
V = 80( final velocity)
when the weight of the object increase block what is the force of friction applied? Explanation?
Answer:
There is absolutely No relationship between the weight of an object (which is constant) and the frictional force. If a block is sliding on a surface, that surface will be exerting a force on the block. That force can be resolved into a component parallel to the surface (which we call the frictional component), and a component perpendicular to the surface (called the normal component). For many situations, we find experimentally that the frictional component is approximately proportional to the normal component. The frictional component divided by the normal component is defined to be a quantity called the coefficient of kinetic or sliding friction. The coefficient of kinetic friction obviously depends on the nature of the surfaces involved. The normal component on an object can be decreased if you pull in the direction of the normal component (the weight does not change). However pulling this way on the object not only decreases the normal component, but it also decreases the frictional component since they are proportional. This is why it is easier to slide something if you pull up on it while you push it. If you push down, the normal and frictional components increase so it is harder to slide the object. The weight of an object is the downward force exerted by Earth’s gravity on that object, and it does not change no matter how you push or pull on the object.
4. What is the purpose of the corneal reflex?
Please help me! Today's Daily Question is:
What color is the sky when a volcano erupts?
I will give Brainliest to the correct answer, or whoever answers first. Have a great day or night.
Answer:
Red I'm pretty sure
Explanation:
Vocanic ash and sunsets. Volcanic eruptions can inject millions of tonnes of dust and gaseous sulfur dioxide into the stratosphere. ... The dust and aerosol produce vivid sunset and twilight effects like the intense yellow-red horizon and purple-pink glows of the photograph.
The sky is a Dark Black.
Explanation:
The smoke from the volcano fills the sky with black smoke
I need help with some physics stuff HELP
Answer:
You just double the number of boxes it goes higher. Then triple the number for the second question. But don't change the time.