All categories

3 years ago

Please help I will fail

Physics

1 answer:

Mandarinka [93]3 years ago

4 0

Answer:

6. A

7. C

8. B

9. The average speed is the distance (a scalar quantity) per time ratio. Speed is ignorant of direction. The average velocity is the displacement or position change (a vector quantity) per time ratio.

You might be interested in

Jim and Sally both do identical jobs. Jim works quickly while Sally works slowly. Which of the following is true?

Lynna [10]

The answer should be C

5 0

3 years ago

4. An object is moving with an initial velocity of 9 m/s. It accelerates at a rate of 1.5

Nata [24]

Answer:

11.9 m/s

*But if you need the answer with sig figs it should be 10m/s (1sf) or 12m/s (2sf)

Explanation:

${vf}^{2} - {vi}^{2} = 2ad$

${vf}^{2} = 2ad + {vi}^{2}$

${vf}^{2} = 2 \times 1.5 \times 20 + {9}^{2}$

${vf}^{2} = 60 + 81$

${vf}^{2} = 141$

$vf = \sqrt{141}$

$vf = 11.874$

best answer if it worked

3 0

3 years ago

qizlet, The concentration of a diluted "wine" sample was found to be 0.32 %(v/v) ethanol. Assuming the wine was diluted by 50x b

Semmy [17]

Answer:

The original concentration of ethanol is 16%(v/v)

Explanation:

concentration before dilution, C1 = ?

Concentration after dilution, C2 = 0.32% (v/v)

Volume before dilution, V1 = x

Volume after dilution, V2 = 50x

From the dilution principle

C1V1 = C2V2

(C1) * x = (0.32) * 50x

C1 = (16x)/x

C1 = 16%(v/v)

6 0

4 years ago

If a wave y(x, t) (6.0 mm) sin(kx (600 rad/s)t f) travels along a string, how much time does any given point on the string take

kipiarov [429]

Answer:

t₁ - t₂ = 0.0011 s

Explanation:

given,

y(x, t) = (6.0 mm) sin( kx + (600 rad/s)t + Φ)

now,

y m = 6 mm ω = 600 rad/s

y₁ = + 2.0 mm y₂ = -2 .0 mm

now,

2 = (6.0 mm) sin( kx + (600 rad/s)t + Φ)

-2 = (6.0 mm) sin( kx + (600 rad/s)t + Φ)

so,

kx + (600 rad/s)t₁ + Φ = $\dfrac{\pi}{180}sin^{-1}(\dfrac{1}{3})$ ......(1)

we have multiplied with π/180 to convert angle into radians

kx + (600 rad/s)t₂ + Φ = $\dfrac{\pi}{180}sin^{-1}(-\dfrac{1}{3})$ ......(2)

subtracting both the equation (1)-(2)

600(t₁-t₂) = $\dfrac{2\pi}{180}sin^{-1}(\dfrac{1}{3})$

now,

t₁ - t₂ = 0.0011 s

time does any given point on the string take to move between displacements is equal to 0.0011 s

3 0

4 years ago

An action that has the ability to change an object’s state of motion is

Aleksandr-060686 [28]

Answer:

An unbalanced force

Explanation:

7 0

2 years ago