PHYSICS HIGH SCHOOL

If a wave has a wavelength of 9 meters and a period of 0.006, what is the velocity of the wave?A. 1,285 m/s

B. 1,200 m/s
C. 1,800 m/s
D. 1,500 m/s

Answers

Answer 1
Answer:

Answer

D. 1,500 m/s

Explanation

the wave equation states that,

V = λf

Where V ⇒ Velocity

λ ⇒ wavelength

f ⇒ Frequency

F = 1/T

Where T ⇒ period

F = 1/0.006

= 166.667

∴ V = 9 × 166.667

= 1,500 m/s
Answer 2
Answer: D.1500m/s Speed= Distance/Time : .You simply divide 9metres (distance) by 0.006 (time)

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A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 min. How fast (in m/s) is the car moving after this time?

Answers

Answer:

24.1 m/s

Explanation:

Using newton's equation of motion,

s = (v+u)t/2 .............................. Equation 1

Where s = distance,  v = Final velocity, u = initial velocity, t = time.

making v the subject of the equation,

v = (2s/t)-u........................... Equation 2

Given: s = 3.2 km= ( 3.2×1000) m = 3200 m , t = 3.5 min = (35× 60 ) s = 210 s, u = 6.4 m/s.

substitute into equation 2

v = (2×3200/210)-6.4

v = 24.076 m/s

v ≈ 24.1 m/s

Having some knowledge of psychology, you'll shine your shoes and "dress for success" before going to a job interview because you want to

Answers

You do these things before a job interview because you want to benefit from primacy effect. Primacy effect refers to the fact that the things that people notice first about other people are likely to be remembered more easily, meaning that first impressions matter. So if you turn up to your job interview in a neat manner, and you are very presentable, you will be more likely to get that job than if you looked like a hobo.

Answer:

benefit from primacy

Explanation:

WOlf93 I 100% agree with you... dont look like a hobo ppl lol

Calculate the Energy (E) in joules for that wavelength and record it in the table below. Remember that E = HF, where h the Planck constant (6.6 *10^-34 j*s)

Answers


In that formula for Energy, 'F' is the frequency of the photon.
But Frequency = (speed)/(wavelength), so we can write the
Energy formula as
                                 E = h c / (wavelength) .

So the energy, in joules, of a photon with that wavelength, is . . .

                                 E = (6.6 x 10⁻³⁴) x (3 x10⁸) / (that wavelength)

                                    = (1.989 x 10⁻²⁵) / (that wavelength, in meters) .

What is the potential energy of a 1-kilogram ball is thrown into the air with an initial velocity of 30m/sec?

Answers

the ball thrown from height=0
potental energy(PE) =0
kinetic energy(KE) = 0.5mv^2 = 0.5(1)(30^2) = 450

at the highest point the ball does not moved, v=0
potential energy at its maximum
kinetic energy = 0

Energy is conserved then
total energy before = after
PE1 + KE1 = PE2 + KE2
0 + 450 = PE2 + 0

conservation of energy is fun fact
mass=1kg
g=10m/s^2 (assuming)
u=30m/s
height(h)=u^2/2g
=900/20=45m
P.E.=mgh
=1×10×45=450 joules

Two objects are traveling on the same track. for 10 s, object x has an average acceleration of 3.0 m/s/s. if object y has an initial velocity of 0 m/s and a final velocity of 25 m/s after 10 s, how does it acceleration compared to object x's?

Answers

Final answer:

The acceleration of object Y is 2.5 m/s/s which is less than the acceleration of object X which is 3.0 m/s/s.

Explanation:

The acceleration of an object is calculated using the formula: a = (v_f -v_i) / t, where v_f is the final velocity, v_i is the initial velocity and t is time. For object Y, the final velocity is 25m/s, the initial velocity is 0m/s and the time is 10s, hence its acceleration will be (25-0)/10 = 2.5 m/s/s. This indicates that Object Y's acceleration is less compared to Object X's acceleration of 3.0 m/s/s.

Learn more about Acceleration here:

brainly.com/question/12550364

#SPJ3
       v=at 
       v=10a
25/10=a
    2.5=a

object x accelerates 0.5m/s faster than object  y
 

A jeep-like vehicle has a canvas top that seals around all sides. When the jeep is at rest, the canvas roof is flat and level. If all the windows of the jeep are rolled up, and the jeep is traveling along the road at high speed, how does the canvas roof react?

Answers

When Jeep is in motion the Canvas top is initially flat

so when Jeep is in motion the air at the top of the Jeep is in high speed

while the air inside the jeep is not moving that fast

so as per Bernuolli's Theorem we know

P + (1)/(2)\rho v^2 = constant

so if we increase the speed the pressure will decrease

so the canvas will experience less pressure at the top of canvas while at the bottom it will have more pressure from inside

so the Canvas will bulge outside or curved outside

Answer:

it flops, duh

Explanation:

I own a jeep
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