Answer:
3.91m/s
Explanation:
We can use the equation h=16t^2 to find the height in feet for a free-falling object. The height from the bridge to the water is h=16(0.4)^2=16(0.16)=2.56 ft
Next, we use the equation v=sqrt(2gh) to determine velocity from vertical height. First we must convert feet to meters as velocity is measured in m/s. 2.56ft is about 0.78 meters. Since h=0.78m from the previous equation and g=9.81m/s^2, then your velocity is v=sqrt(2*9.81*0.78)=sqrt(15.3036)=3.911981595
So, your speed/velocity is approximately 3.91m/s
the centre of mass of a metre rule is at the 50cm mark. state what is meant by Centre of mass
Answer:
Centre of mass of any body is a point where all mass of a body is supposed to be concentrated
it lies in geometrical centre....
In which position is it winter in North America? *
10 points
The model shows Earth in several positions relative to the sun.
3
2
North America
Equator
Position 1 because North America receives the most direct Sun
Position 2 because North America is tilted towards the Sun
Position 3 because North America is parallel to the Sun
Position 4 because North America is tilted away from the Sun
Answer:
position 4
Explanation:
if the north is tilted away it gets no sunlight, so its winter
It is winter in North America in position 4 because North America is tilted away from the Sun.
What is cycle of seasons of Earth?The "cycle of seasons" is caused by the occurrence of each season one after the other throughout the year. The seasons are also influenced by variations in the atmosphere, air vapour, wind, and precipitation.
A season other than summer and winter is created when rain falls continuously throughout a certain time. Other than summer and winter, seasons are seen to occur in different regions due to the local conditions.
As shown in the figure, at position 4, North America is tilted away the Sun, the sun light falls on America in tilted manner. Hence, It is winter in North America in position 4. Whereas at position 2, North America is tilted towards the Sun and It is summer in North America in position 2.
Learn more about Earth here:
https://brainly.com/question/989580
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explain the intermittent reinforcement schedules in your own words
In behaviorism, Intermittent Reinforcement is a conditioning schedule in which a reward or punishment (reinforcement) is not administered every time the desired response is performed. ... On an intermittent reinforcement schedule the mouse would only receive food every few times (it is typically random and unpredictable).
How do we calculate the restoring force according to Hooke’s law?
Answer:
Accordng to Hook's law
F=kx
So
spring constant × displacement
Explanation:
Answer: A) spring constant × displacement
Accordng to Hook's law
F=kx
So
A) spring constant × displacement
Explanation: hope this helps pls mark me brainliest
what is this.
best answer gets brainiest
Answer:
the Thanksgiving turkey
which type of energy is the energy of a moving tennis ball
Answer:
Kinetic energy.
The explanation never existed
Answer: Kinetic Energy
Please Help!!
What is the potential energy of a spring that is compressed 0.75 m by a 25 kg block if the spring constant is 85 N/m?
24
34
87
797
Answer:
Potential energy of spring = 24 Joules.
Explanation:
Given the following data;
Spring constant = 85N/m
Extension, e = 0.75m
Mass = 25kg
To find the potential energy of a spring
Potential energy of a spring is given by the formula;
P.E = ½ke²
Substituting into the equation, we have
P.E = ½*85*0.75²
P.E = 42.5 * 0.5625
P.E = 23.91 ≈ 24 Joules
P.E = 24 Joules
Which direction do fluids (air and water) always move
Answer:
fluids always move from an area of higher pressure to an area of lower pressure.
Explanation:
A spring with a spring constant of 300Nm is compressed 0.4m. What is the potential energy stored in the spring?
Group of answer choices
60
120
48
24
Answer: The answer is 120
Explanation:
write a vector equation
Answer:
In general, a vector equation is any function that takes any one or more variables and returns a vector. The vector equation of a line is an equation that identifies the position vector of every point along the line. This works for straight lines and for curves.
Explanation:
1.A vector has magnitude (size) and direction:
2.a − b.
3.A vector is often written in bold, like a or b.
4.The vector a is broken up into.
5.We can then add vectors by adding the x parts and adding the y parts:
6.When we break up a vector like that, each part is called a component:
7.|a|
8.||a||
(hope this helps can i plz have brainlist :D hehe)
Sam drives her scooter 7 kilometres north. She stops for lunch and then drives
5 kilometres east. What distance did she cover? What was her displacement?
Answer:
1. Distance travelled = 12 km.
2. Displacement = 8.6 km
Explanation:
From the question given above, the following data were obtained:
Distance 1 (d₁) = 7 km
Distance 2 (d₂) = 5 km
Total distance =?
Displacement =?
1. Determination of the distance travelled.
Distance 1 (d₁) = 7 km
Distance 2 (d₂) = 5 km
Total distance (dₜ) =?
dₜ = d₁ + d₂
dₜ = 7 + 5
dₜ = 12 km
2. Determination of the displacement.
In the attached photo, R is the displacement.
We can obtain the value of R by using the pythagoras theory as illustrated below:
R² = 7² + 5²
R² = 49 + 25
R² = 74
Take the square root of both side
R = √74
R = 8.6 km
Research all three options: diet, exercise, combination of diet and exercise, Write a one page, typed, double-spaced summary of which you think is better and why.
Answer:
EXERCISE
It is very useful than diet and better than diet. All cannot do diet also exercise some of them will do but if we do exercise it is very helpful for health but diet is not much helps regular exercise helps body fitness and health it will burn fat fast if we do regularly or else no and if we do exercise even our face glows naturally. Morning exercise helps to refresh our mind and our full day will be active.For me EXERCISE is better than diet
Ca(s) + PbCl2(aq) → CaCl2(uq) + Pb(s)
Answer: It is a balance equation
Explanation:
2. What is the reason for spherometer stands on three legs?
Answer:
tis unknown
Explanation:
dan dan duuun dun dun
1)Pulmonary artery
2)Pulmonary vein
3)Aorta
4)Inferior vena cava
Answer and I will give you brainiliest
see the picture and here is the name of it
A = Pulmonary artery
B = inferior vena cava
C = aorta
D = left ventricle
E = right ventricle
F = pulmonary system in kidney
G = Pulmonary system
H = Pulmonary vein
For moderators that see this#Moderators please don't be mean, dont delete my answers just to get approval from your senior or just to get the biggest moderation daily rank.
A square metal plate of edge length 12 cm and negligible thickness has a total charge of 5.6 × 10-6 C. (a) Estimate the magnitude E of the electric field just off the center of the plate (at, say, a distance of 0.49 mm from the center) by assuming that the charge is spread uniformly over the two faces of the plate. (b) Estimate E at a distance of 29 m (large relative to the plate size) by assuming that the plate is a charged particle.
Answer:
a) 2.2*10^7 N/C
b) 60 N/C
Explanation:
To start with, we say that the
Area charge of the plate, σ = q/2A
σ = 5.6*10^-6 / 2(12*10^-2)²
σ = 5.6*10^-6 / 0.0288
σ = 1.944*10^-4 C²/m
Next, we find the electric field
Electric field, E = σ/Eo
Electric field, E = 1.944*10^-4 / 8.85*10^-12
Electric field, E = 2.2*10^7 N/C
b)
E = kq/r²
E = [8.99*10^9 * 5.6*10^-6] / 29²
E = 50344 / 841
E = 60 N/C
This means that the E at a distance of 29 m is 60 N/C
1. А 3 kg red ball moves at 4.50 m/s. How fast must a 50 g white ball move to
have the same kinetic energy as the red ball?
help me please!!!!!!
if 3kg moves at 4.50 so 50 is 225
What’s E=1/2m v^2
Find v
Answer peek a boo
Explanation:
Answer:
v is the velocity of a object
A measurement of low pressure means that warm air is ________________ and cooling down, which causes ___________ weather.
Answer:
A measurement of low pressure means that warm air is rising and cooling down, which causes stormy weather.
Understand how to apply the equations for 1-dimensional motion to the y and x directions separately in order to derive standard formulae for the range and height of a projectile.
Answer:
the equations of motion can be separated into an equation that depends on a single variable.
Explanation:
he one-dimensional kinematics equations can be applied to two-dimensional systems because we can write the equations in such a way that each one of them depends on variables in a single dimension plus time, which, because it is a scalar, can be used in all dimensions.
A mathematical way of saying this is that the equations of motion can be separated into an equation that depends on a single variable.
Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee I am going to follow youuu
Answer:
Answer 11
Explanation:
. Newton's law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them
Ken Warby holds the world record speed
on water. If he drove his motorboat a
distance of 1000.0 m in 7.045 s, how fast
was his boat moving?
Know
Find
Equation
Solve
Answer:
141.9m/s
Explanation:
know:
distance = 1000.0m
time = 7.045s
find:
speed = ?
equation:
v = d/t
solve:
v = d/t
= 1000.0m/7.045s
= 141.9m/s
therefore, his boat was moving 141.9m/s
Please help, these questions are actually irritating me
**If the simple machine reduces the amount of force, what must be increased? (Think of using an inclined plane)**
A.) the speed of the input force
B.) the distance over which the force is applied
C.) the work the simple machine performs
D.) the size of the simple machine
**What is an input force?**
A.) the force a simple machine applies to an object
B.) the force a person applies to a simple machine
C.) the applied force on a system
D.) the net force on a system
**A pair of scissors is which category of lever?**
A.) 1st class
B.) 2nd class
C.) 3rd class
D.) 4th class
1.The distance over which the force is applied
2. The force a person applies to a simple machine
3. 1st Class
Select the correct answer.
Which astronomical advancement was attributed to the Mayans?
A.
They calculated the exact solar year as 365.25 days.
B.
They observed the moons of Jupiter.
C.
They were aware that Earth orbits the Sun.
D.
They calculated the various phases of the Moon.
Answer:
D.They calculated the various phase of the Moon is Answer.
Explanation:
I hope it's helpful!
Elevated water tanks are used in a municipal water distribution system to provide adequate pressure. Compute the height (h) of the water tank above the ground surface to provide a static pressure of 410 kPA (60 psi). Compute the pressure in a building that is 12 m (40ft) above the ground surface. Typically, the pressure in a water distribution will range from (275 to 620 kPa) (40-90 psi). Compute the range in h corresponding this range in pressure. If the range in pressure is greater than this, multiple pressure zones may be required for the water distribution system. Are multiple pressure zones needed
Answer:
a) h = 53.8 m, b) h_minimum = 28 m, h_maximum = 63.3 m
Explanation:
a) For this exercise let's use Bernoulli's equation.
The subscript 1 is for the tank and the subscript for the building
P₁ + ½ ρ g v₁² + ρ g y₁ = P₂ + ½ ρ g v₂² + ρ g y₂
In general, the water tanks are open to the atmosphere, so P1 = Patm, also the tanks are very large so the speed of the water surface is very small v₁=0 and as they give us the precious static, this it is when the keys are closed so the output velocity is zero, v₂= 0. The height of the floors in a building is y₂ = 12 m
we substitute in Bernoulli's equation
P_{atm} + 0 + ρ g h = P₂ + 0 + ρ g y₂
h = [tex]\frac{(P_2 - P_{atm}) + \rho \ g \ y_2}{\rho \ g}[/tex]
h = [tex]\frac{\Delta P}{\rho g}[/tex] + y₂
indicate that the value of ΔP = 410 10³ Pa
we calculate
h = 410 10³ / (1000 9.8) + 12
h = 53.8 m
b) ask for the height range for the minimum and maximum pressure
h =[tex]\frac{\Delta P}{\rho g}[/tex] ΔP / rho g
minimum
h_minimum = 275 103/1000 9.8
h_minimum = 28 m
maximums
h_maximo = 620 103/1000 9.8
h_maximum = 63.3 m
The changing appearance of the Moon during the lunar cycle is the result of the changing -
relative positions of Earth, the Moon and the Sun.
Earth's shadow on the surface of the Moon.
amounts of light emitted by the Moon.
gravitational pull of the Moon as it orbits Earth.
Answer:
relative positions of Earth, the Moon and the Sun.
Explanation:
A lunar eclipse is a phenomenon that occurs when the Earth comes between the Moon and the Sun thereby causing it to cover the Moon with its shadow.
Simply stated, lunar eclipse takes place when the Moon passes or moves through the Earth's shadow thereby blocking any ray of sunlight from reaching the Moon. Thus, the full moon appears deep red (blood moon).
Also, a lunar eclipse would occur only when the Sun, Earth, and Moon are closely aligned to form a straight line known as the syzygy.
There are three (3) types of lunar eclipse and these are;
1. Total lunar eclipse.
2. Partial lunar eclipse.
3. Penumbra lunar eclipse.
Hence, the changing appearance of the Moon during the lunar cycle is the result of the changing relative positions of Earth, the Moon and the Sun.
Gravity Rocks!
Three friends were talking about gravity. One friend
held up a rock and asked his friends whether the gravi-
tational force on the rock depended on where the rock
was located. Each friend had a different idea about a
place where the gravitational force on the rock would
be the greatest. This is what they said:
Lorenzo: "I think if you put the rock on the top of a very tall mountain, the gravita-
tional force on the rock will be greatest."
Eliza: "I think the gravitational force will be greatest when the rock is resting on
the ground near sea level."
Flo: "I think you have to go really high up. If you drop the rock out of a high-
flying plane, the gravitational force will be greatest."
Explain why you agree with
Which friend do you most agree with?
that friend.
Answer:
Eliza’s suggestion is the most promising
Explanation:
Newton’s law of universal gravitation is [tex]F = G\frac{m_1m_2}{r^2}[/tex] where G is a constant and both masses are constant in this experiment as well. So it only depends on r, the distance between the center of mass of both objects.
Bringing it high in the sky, as Flo suggests, is definitely not a good idea because it only increases the distance from the center of the Earth mass.
A mountain contains significant mass, so the center of the Earth mass is somewhat shifted to regions with the largest mountains. However, standing on top of a mountain, as Lorenzo suggests, doesn’t help since the shift of the center of mass, if any, is far smaller than the height of the mountain.
Standing near sea level, as Eliza suggests, is a good way to minimize the distance to the center of the Earth mass.
A train is moving with a velocity of 70 km/h. If north is taken as the positive direction, what is the direction of movement of the train?
Answer:
+70 km/h north
Explanation:
Answer:North/speeding up
Explanation:
Consider the following scenario. A car for which friction is NOT negligible accelerates from rest down a hill, running out of gasoline after a short distance. The driver lets the car coast farther down the hill, then up and over a small crest. He then coasts down that hill into a gas station, where he brakes to a stop and fills the tank with gasoline. Identify the forms of energy the car has,
Answer:
The answer is below
Explanation:
Gravitational Potential energy is the energy stored by an object as a result of its vertical position or height.
Kinetic energy is the energy an object possesses due to its motion.
The law of conservation of energy states that energy cannot be created or destroyed but can be transformed from one form to another.
As the car accelerates down the hill, there is a change in gravitational potential energy as a result of decrease in vertical height. Some of the gravitational potential energy would be changed into work done by friction while the rest would cause an increase in kinetic energy due to the car acceleration. Lastly, when the brake is applied to stop the car, the car would lose its kinetic energy.
Over an interval of 4.0 s the average rate of change of the concentration of B was measured to be -0.0760 M/s. What is the final concentration of A at the end of this same interval if its concentration was initially 1.600 M?
Complete question:
Consider the hypothetical reaction 4A + 2B → C + 3D
Over an interval of 4.0 s the average rate of change of the concentration of B was measured to be -0.0760 M/s. What is the final concentration of A at the end of this same interval if its concentration was initially 1.600 M?
Answer:
the final concentration of A is 0.992 M.
Explanation:
Given;
time of reaction, t = 4.0 s
rate of change of the concentration of B = -0.0760 M/s
initial concentration of A = 1.600 M
⇒Determine the rate of change of the concentration of A.
From the given reaction: 4A + 2B → C + 3D
2 moles of B ---------------> 4 moles of A
-0.0760 M/s of B -----------> x
[tex]x = \frac{4(-0.076)}{2} \\\\x = -0.152 \ M/s[/tex]
⇒Determine the change in concentration of A after 4s;
ΔA = -0.152 M/s x 4s
ΔA = -0.608 M
⇒ Determine the final concentration of A after 4s
A = A₀ + ΔA
A = 1.6 M + (-0.608 M)
A = 1.6 M - 0.608 M
A = 0.992 M
Therefore, the final concentration of A is 0.992 M.