This girl named Emma she my crush what do I say to her.
Answer:
you gotta shoot your shot.
Explanation:
look for the signs. ask her out before someone else does. you got this dawg
1.A motorcycle’s velocity at the top of the hill is 11.0 m/s. 4.0 seconds later it reaches the bottom of the hill with a velocity of 20.0 m/s. What is the acceleration of the motorcycle?
2.A motorcycle’s velocity at the top of the hill is 11.0 m/s. 4.0 seconds later it reaches the bottom of the hill with a velocity of 20.0 m/s. What is the acceleration of the motorcycle?
Answer:
1) as far as I remember
Let's take 20 as vf (final velocity) and 11 as (initial velocity) and 4 as time
So we would use this formula a=vf-vi/t
So 20-11/4
Asnwer 2.25
How is a circuit formed
Answer:
An electrical circuit is composed of a source of electrical power, two wires that can carry electric current, and a light bulb. One end of both the wires is attached to the terminal of a cell while their free ends are connected to the light bulb. The electrical circuit is broken when the bulb is switched off.
What's Inertia ????☁️☁️
Explanation:
the inability to change the position from rest to motion or motion to rest by themselves is inertia.
Answer:
Inertia is the property of a body in rest to resist motion or a body in motion to continue to its state of motion unless acted by external forces.
A copper wire loop has a circular shape, with a radius a (see below). The loop is put perpendicularly to the uniform magnetic field, which changes with time according to the next function (α and β are both constant and positive): B = α + βt. Is there an electromotive force induced in the loop? If yes, calculate its value and find its direction. If not, explain why there is no electromotive force induced in the loop.
Answer:
fem = -A β
Explanation:
Faraday's law gives the induced electromotive source (emf)
fem = [tex]- \ \frac{d \phi_B }{dt}[/tex]
the magnetic flux is
[tex]\phi_B[/tex] = B. A = B A cos θ
the bold are vectros. In this case the normal to the ring is parallel to the magnetic field so the angle is zero cos 0 = 1, also the area of the ring is constant
fem = -A [tex]\frac{dB}{dt}[/tex]
we carry out the derivative of the function B = α + β t
fem = -A β
so we see that there is an electromotive force in the ring.
Potential Energy: A cat which weighs 10 kg walks up a ladder. The ladder has a height of 15 m. How many joules of gravitational
potential energy does the cat have?
Human resource professionals are reviewing the needs of a company that is
building a new factory. The company needs people who can weld electronic
elements together, test them, and package them securely. The HR
professionals conclude that four kinds of workers could complete this
process. Their work is the HR function of
A. employee retention
B. recruitment
C. selection
D. job design
Where on the periodic table are metal elements most likely found?
A. Along the stairstep line
B. In the main groups
C. On the left side
D. On the right side
Metal elements are most likely found on the left side of the periodic table. Details about periodic table can be found below.
What is periodic table?Periodic table is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group or column.
Metallic elements are one of the group of elements found on the periodic table and they include the following:
CalciumPottasiumScandiumMetallic elements are located on the left hand side of the periodic table.
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Answer: (A) Along the stairstep line
Explanation:
What is the relationship between potential and kinetic energy and electricity
Answer:
The primary relationship between the two is their ability to transform into each other. In other words, potential energytransforms into kinetic energy, andkinetic energy converts into potential energy, and then back again.
PLEASEHELP THANK YOU SM
Answer:
I belive it would be the first answer choice.
Explanation:
When the Mass is lower, the ball moves faster so it would have more kintetic energy
When naming the compound containing lithium and chlorine, change the
suffix of the anion's name to
O A. ide
B. ite
C. cation
D. anion
Ape_x
Answer: Ide
Explanation:
Just got it right on the quiz
Answer:Ide
Explanation: thats the answer for a pex
An 88.0 kg passenger is inside a 1450.0 kg elevator that rises 30.0 m in exactly 1.0 minutes. How much power is needed for the elevator's trip?
Answer:
Explanation:
what is the average of this set of data 5, 18, 8, 4, 10
answer:
9
Explanation:
add them all together then divide
If a 96 n force of gravity is happening to a falling basketball what is the ball mass? The accelydue to gravity is 9.8m/s^2
Answer:
9.80 kg
Explanation:
F = ma
96 N = m(9.8 m/s^2)
m = 9.80 kg
The mass of the ball will be m= 9.8 kg
What is Newton's second law of motion?
It states that the force is equal to the rate of change of momentum . For a constant mass , force is equal to mass times acceleration
given :
Force due to gravity = 96 N
g = acceleration due to gravity = 9.8 m /s^2
using Newton's second law of motion
Since , F = ma
96 = m g
m = 96/9.8
m= 9.8 kg
The mass of the ball will be m= 9.8 kg
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A 90° elbow in a horizontal pipe is used to direct water flow upward at a rate of 40 kg/s. The diameter of the entire elbow is 10 cm. The elbow discharges water into the atmosphere, and thus the pressure at the exit is the local atmospheric pressure. The elevation difference between the centers of the exit and the inlet of the elbow is 50 cm. The weight of the elbow and the water in it is considered to be negligible. Determine (a) the gage pressure at the center of the inlet of the elbow and (b) the anchoring force needed to hold the elbow in place. Take the momentum-flux correction factor to be 1.03 at both the inlet and the outlet.
Answer:
(a) The gauge pressure is 4,885.3 Pa
(b) The anchoring force needed to hold the elbow in place is approximately 296.5 N
The direction of the anchoring force is approximately ≈ 134.8
Explanation:
The given parameters in the fluid dynamics question are;
Pipe elbow angle, θ = 90°
The mass flowrate of the water, [tex]\dot m[/tex] = 40 kg/s
The diameter of the elbow, D = 10 cm
The pressure at the point of discharge of the fluid = Atmospheric pressure
The elevation between the inlet and exit of the elbow, z = 50 cm
The weight of the elbow and the water = Negligible
(a) The velocity of the fluid, v₁ = v₂ = v is given as follows;
ρ·v·A = [tex]\dot m[/tex]
v = [tex]\dot m[/tex]/(ρ·A)
Where;
ρ = The density of the fluid (water) = 997 kg/m³
A = The cross-sectional area of the of the elbow = π·D²/4 = π×0.1²/4 ≈ 0.00785398163
A = 0.00785398163 m²
v = 40 kg/s/(0.00785398163 m² × 997 kg/m³) ≈ 5.1083 m/s
Bernoulli's equation for the flow of fluid is presented as follows;
[tex]\dfrac{P_1}{\rho \cdot g} +\dfrac{v_1}{2 \cdot g} + z_1 = \dfrac{P_2}{\rho \cdot g} +\dfrac{v_2}{2 \cdot g} + z_2[/tex]
v₁ = v₂ for the elbow of uniform cross section
P₁ - P₂ = ρ·g·(z₂ - z₁)
P₁ - P₂ = The gauge pressure = [tex]P_{gauge}[/tex]
z₂ - z₁ = z = 50 cm = 0.5 m
∴ [tex]P_{gauge}[/tex] = 997 kg/m³ × 9.8 m/s² × 0.5 m = 4,885.3 Pa
The gauge pressure, [tex]P_{gauge}[/tex] = 4,885.3 Pa
(b) The forces acting on the elbow are;
[tex]F_{Rx}[/tex] + [tex]P_{gauge}[/tex]·A = -β·[tex]\dot m[/tex]·v
[tex]F_{Ry}[/tex] = β·[tex]\dot m[/tex]·v
∴ [tex]F_{Rx}[/tex] = -β·[tex]\dot m[/tex]·v - [tex]P_{gauge}[/tex]·A
[tex]F_{Rx}[/tex] = -1.03 × 40 kg/s × 5.1083 m/s - 4,885.3 Pa × 0.00785398163 m² ≈ -208.83 N
[tex]F_{Ry}[/tex] = 1.03 × 40 kg/s × 5.1083 m/s = 210.46196 N
The resultant force, [tex]F_R[/tex], is given as follows;
[tex]F_R[/tex] = √([tex]F_{Rx}[/tex]² + [tex]F_{Rz}[/tex]²)
∴ [tex]F_R[/tex] = √((-208.83)² + (210.46196)²) ≈ 296.486433934
Therefore;
The anchoring force needed to hold the elbow in place, [tex]F_R[/tex] ≈ 296.5 N
The direction of the anchoring force, θ
[tex]\theta = tan^{-1}\left( \dfrac{F_{Ry}}{F_{Rx}} \right)[/tex]
∴ θ = arctan(210.46196/(-208.83)) = -45..2230044°
θ = 180° + -45.2230044° = 134.7769956°
∴ The direction of the anchoring force is approximately, θ ≈ 134.8°
Two swimmers competed in a race. The graph shows how the position of both swimmers
changed over time during the race.
Two swimmers competed in a race. The graph shows how the position of both swimmers
At what rate of speed did Swimmer 1 travel throughout the race?
Answer:
2m/s
Explanation:
Calculate the slope at any point as the line is linear. i.e. 20/10 = 2/1 m/s
CAN SOMEONE HELP ME WITH THIS
Answer:
D
Explanation:
Please help /Show work
A student has two identical sheets of paper. He crumples one up into a small ball. If he drops the sheet of paper and the ball of paper off a building at the same time, which of the following statements describes the result?
A. The sheet of paper because it is more affected by gravity.
B. The ball of paper hits the ground first because it is more affected by gravity
C. The sheet of paper and the ball of paper hit the ground at the same time.
D. The ball of paper hits the ground first because it has less surface area.
Answer:
B
Explanation:
basically, because the ball "weighs" more now, it will hit the ground quicker. so technically gravity is more affective towards it. the piece of paper kind of floats it's way down. gravity isn't pushing on one force more, but because because the ball weighs more, it technically would be said so. hope this helps!
Answer:
the ball of paper, because it has less surface area.
Explanation:
An object is lifted against gravity from the floor to a tabletop. This is an example of
Answer:
Work done against gravity in lifting an object becomes potential energy of the object-Earth system. The change in gravitational potential energy, ΔPEg, is ΔPEg = mgh, with h being the increase in height and g the acceleration due to gravity.
Explanation:
Which of the following statements about Australian football is TRUE?
A.
The players tend to wear a large amount of padding.
B.
Goals are scored by kicking the ball through goalposts.
C.
Each team has a number of set plays for both offense and defense.
D.
The constant movement of the ball is similar to baseball.
Answer:
B.
Goals are scored by kicking the ball through goalposts.
Explanation:
The amount of potential energy (PE) an object has depends on the object's _____________. *
height
motion
velocity
Joules
The amount of kinetic energy (KE) an object has depends on the object's _____________ *
height
motion
acceleration due to gravity
Joules
What is the law of inertia? Give an example of inertia in action.
Answer:
The law of inertia is another name for Newton's first law. Newton's first law states that an object will not change its motion or direction unless a force acts on it. An object at rest will stay at rest and an object in motion will stay in motion if there isn't any force acting on them.
Example: When a car uses its brakes to stop, you sometimes feel like you are sliding forward. That is because the inertia keeps you moving forward, even though the car stopped.
Explanation:
Answer:
Law of inertia is sometimes called Newtons First law of motion.
Newtons first law of motion states that"A body will continue to its state of rest or motion unless external force acted upon it.
The linear expansivity of metal P is twice that of another metal Q. When these materials are heated through the same temperature change, their increase in length is the same. Calculate the ratio of the original length of P to Q
who Henry Mosléy?!!!
Answer:
Henry Moseley was an English physicist whose contribution to the science of physics was the justification from physical laws of the previous empirical and chemical concept of the atomic number.
1. Find the acceleration of an object when the force is 5.2 N and the mass is 2.6 x 10kg.
Answer:
F=ma
5.2N=26a
a=5.2÷26=0.2
Answer:
0.2 metre square
Explanation:
acceleration=force/mass
When an object is moving to the left and slowing down, what direction is the acceleration?
Answer:
According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object has a negative acceleration. In Example D, the object is moving in the negative direction (i.e., has a negative velocity) and is speeding up.
Explanation:
(True/False) According to Newton’s third law of motion, it is true that an object moving at a constant speed in a straight path will continue to do so until a net force acts upon it.
The statement itself is true. But to be completely and compulsively correct, that's Newton's FIRST law of motion, not the third.
answer this plsss
The range of human hearing is 20 Hz – 20 000 Hz.
Calculate the longest and shortest wavelengths we can hear.
Explanation:
the velocity of sound in air is 330m/s
and v=fh, where h is wavelength f is frequency,
h=v/f.......(1)
longer wavelength
h=330/20,h=16.5m
shorter wavelength
h=330/20000,h=1.65x10-²m
The lesser frequency was used for finding the longer wavelength since wavelength is inversely proportional to frequency,
thus an increase in frequency brings a decrease in wavelength.
and shorter wavelengths are more high and intense
hope this helps
A student is creating a model of a concave lens. The diagram shows her incomplete model.
Which action would best complete her model?
A
The student should draw the light moving into the lens and then exiting in converging lines.
B
The student should draw the rays of light moving into the lens and then exiting at right angles.
C
The student should draw the rays of light moving into the lens and then exiting in a straight path.
D
The student should draw the light moving into the lens and then exiting in lines that are spreading out.
Answer:
D
Explanation:
I’m pretty sure it’s correct but I don’t really know. Just trying to pass science
Answer:
The correct answer is D trust me I did the test
When the concave lens moves in it exit by spreading out like water