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4 years ago

A sound wave has a frequency of 192Hz and travels the length of a football field, 91.4m in 0.267s. What is the period?

Physics

1 answer:

Vinvika [58]4 years ago

6 0

Answer:1/192 seconds

Explanation:

Period=1÷frequency

Period=1÷192

Period=1/192 seconds

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Do you think there might be a point in space between Earth and the Moon where the gravity of each would pull on an object equall

Firlakuza [10]

Answer: Yes.

Explanation:

Assuming Earth and Moon are isolated is space, it is possible to have a point where Earth and Moon will pull at an object with equal force.

That point will be closer to the Moon than the Earth because Moon's gravitational field strength is weaker than Earth's gravitational field strength.

7 0

3 years ago

A 5.0 kg block is pushed 2.0 m at a con-

Alona [7]

Answer:

$W_F=127.64283 J$

Explanation:

Information Given:

$m = 5kg$ $v=constant$

Key: μ = Kinetic Friction (Kf) θ = Theta α = 180° N = Normal Force

$W_F=F_ydcos$ θ

$W_F=Fdsin$ θ

$_{net}F_y = sin$ θ-μ $N-mg=0$

$_{net}F_x = 0$

$N=Fcos$ θ

$Fsin$ θ-μ $N=mg$

$Fsin$ θ-μ $Fcos$ θ $=mg$

$F=\frac{mgdsin(theta)}{sin(theta)-(Kf)cos(theta)}$ → $W_F=\frac{mgdsin(theta)}{sin(theta)-(Kf)cos(theta)}$

$W_F=\frac{(2)(9.81)(2)sin(30)}{sin(30)-(0.40)cos(30)}$

$W_F=127.64283 J$

3 0

3 years ago

Friction always opposes an objects?<br><br> A) Power<br> B) Weight<br> C) Motion<br> D) Net force

marin [14]

Friction always opposes motion

8 0

4 years ago

Read 2 more answers

FIGURE 4.1 shows a rectangular wire loop 0.3 m x 0.2 m moving horizontally to the right at 12 ms -1 in a uniform magnetic field

timama [110]

<h3><u>Given :- </u></h3>

Length of the rectangular wire, L=0.3 m
Width of the rectangular wire, b=0.2m
Magnetic field strength, B=0.8 T
Velocity of the loop, v =12 m/s
Induced Current, I = 3 A

$\underline{\underline{\large\bf{Solution:-}}}\\$

(I) Emf developed,E in the loop is given as:

$\begin{gathered}\\\implies\quad \sf E = BLv \\\end{gathered}$

$\begin{gathered}\\\implies\quad \sf E = 0.8 \times 0.3 \times 12 \\\end{gathered}$

$\begin{gathered}\\\implies\quad \sf E = 2.88 V \\\end{gathered}$

$\longrightarrow$ I = E/R

$\quad$ R = E/I

where

R = resistance
E = Induced EMF
I = Current

$\begin{gathered}\\\implies\quad \sf R = \frac{2.88}{3} \\\end{gathered}$

$\begin{gathered}\\\implies\quad \boxed{\sf{ R = 0.96 \;ohm}}\\\end{gathered}$

(ii) The direction of current induced is from P to Q which is given by B × V vector . It may also be explained by Lenz law. Since magnetic field is from S to N . The fingers of the right hand are placed around the wire so that the curling of fingers will show the direction of the magnetic field produced by the wire then the thumb points in the direction of current flow which is from P to Q.

3 0

2 years ago

What is the acceleration, in meters per second squared, of a 2,000,000-kilogram NASA rocket with an applied force of 20,000,000

liubo4ka [24]

Answer:

10m/s^2

Explanation:

Force = mass x acceleration

Acceleration = force/ mass

= 20000000/2000000

=10m/s^2

3 0

3 years ago