10. The following are the statements regarding the human

"The x component of the force on an object varies as shown in Fig. 6-36.

Lelu [443]

Well 0 because if you multiply anything by 0 it will conclude to 0 and number 2 is the same answer hope you got it

4 0

3 years ago

Youare on a train travelling northat 80.0m/s relative to the ground. The air is still relativetothegroundwhen you hear the whist

AURORKA [14]

To solve this problem we will apply the concepts related to the Doppler effect. This is understood as the change in apparent frequency of a wave produced by the relative movement of the source with respect to its observer. Mathematically this is given as,

$f = \frac{v \pm v_r}{v \pm v_s}(f_0)$

Here,

v = Speed of the waves in the middle

$v_r$ = Speed of the receiver in relation to the medium (Positive if the receiver is moving towards the transmitter or vice versa)

$v_s$ = Speed of the source with respect to the medium (Positive if the source moves away from the receiver or vice versa)

Our values are given as,

$v = 342m/s$

$f_0 = 262Hz$

$v_r = 80m/s$

$f = 350Hz$

Replacing,

$350 = \frac{342+80}{342-v} (262)$

Solving for the velocity of the source,

$v = 26.1m/s$

Therefore the speed of the other train is 26.1m/s

3 0

3 years ago

Which planet has the most important role in changing the direction of a comet's path?

borishaifa [10]

Answer:

C.

Jupiter because of its strong gravitational force

Explanation:

6 0

3 years ago

The displacement of particle moving along on x axis is given by x = 18t + 5.0t^2, where x is in meters and t is in seconds Calcu

Masja [62]

Answer:

38 m/s

43 m/s

Explanation:

x = 18t + 5.0t²

The instantaneous velocity is the first derivative:

v = 18 + 10.t

At t = 2.0:

v = 18 + 10.(2.0)

v = 38 m/s

The average velocity is the change in position over change in time.

v = Δx / Δt

v = [ (18t₂ + 5.0t₂²) − (18t₁ + 5.0t₁²) ] / (t₂ − t₁)

Between t = 2.0 and t = 3.0:

v = [ (18(3.0) + 5.0(3.0)²) − (18(2.0) + 5.0(2.0)²) ] / (3.0 − 2.0)

v = [ (54 + 45) − (36 + 20.) ] / 1.0

v = 99 − 56

v = 43 m/s

6 0

3 years ago

A rod of propoer length l0 is at rest in frame S'. it ilies in the x',y' plane and amkes an angle of sin^-1(3/5) What must be th

Blizzard [7]

Answer:

v = 1.98*10^8 m/s

Explanation:

Given:

- Rod at rest in S' frame

- makes an angle Q = sin^-1 (3/5) in reference frame S'

- makes an angle of 45 degree in frame S

Find:

What must be the value of v if as measured in S the rod is at a 45 degree)

Solution:

- In reference frame S'

x' component = L*cos(Q)

y' component = L*sin(Q)

- Apply length contraction to convert projected S' frame lengths to S frame:

x component = L*cos(Q) / γ (Length contraction)

y component = L*sin(Q) (No motion)

- If the rod is at angle 45° to the x axis, as measured in F, then the x and y components must be equal:

L*sin(Q) = L*cos(Q) / γ

Given: γ = c / sqrt(c^2 - v^2)

c / sqrt(c^2 - v^2) = cot(Q)

1 - (v/c)^2 = tan(Q)

v = c*sqrt( 1 - tan^2 (Q))

For the case when Q = sin^-1 (3/5)::

tan(Q) = 3/4

v = c*sqrt( 1 - (3/4)^2)

v = c*sqrt(7) / 4 = 1.98*10^8 m/s

5 0

3 years ago