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Naddika [18.5K]
4 years ago
12

Please help! Science and force stuff. (picture included)

Physics
1 answer:
Nikitich [7]4 years ago
4 0
#4. It says "someone sitting in a chair" So the objects involved are the person and the chair. D is the answer because it talks about the action/reaction forces between the person and the chair.

#5. Work = Force (parallel to direction of distance) * distance. A, B and D are not correct because there is no distance.  C. is the best answer
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A transverse traveling wave on a cord is represented by, where D and x are in meters and t is in seconds.
yarga [219]

Answer with Explanation:

We are given that a transverse travelling wave on a cord is represented by

D=0.51sin(6.1x+76t)

Where D and x in meters

t(in seconds)

a.General equation of transverse wave

y=Asin(kx+\omega t)

By comparing we get

A=0.51

k=6.1

k=\frac{2\pi}{\lambda}

Wavelength,\lambda=\frac{2\pi}{k}=\frac{2\pi}{6.1}=1.03

b.\omega=76

Frequency,f=\frac{\omega}{2\pi}=\frac{76}{2\pi}=12.096Hz

c.Velocity,v=f\lambda=12.096\times 1.03=12.46m/s

Direction:Towards negative x- axis

d.Amplitude,A=0.51 m

e.Maximum speed,v_{max}=A\omega=0.51\times 76=38.76 m/s

Minimum speed,v_{min}=0

6 0
4 years ago
5. A student travels 11 m north and then turns around to travel 25 m south. If the total time of travel is 12 sec., find a) The
11111nata11111 [884]

Explanation:

Given that,

A student travels 11 m north and then turns around to travel 25 m south.

Total time, t = 12 s

The total distance or the total path covered by the student is equal to 11 m + 25 m = 36 m

Displacement of the student or the shortest path covered is d = 25-11 = 14 m

(a) The student's average speed = total distance/total time

s=\dfrac{36\ m}{12\ s}\\\\s=3\ m/s

(b) The student's average velocity = total displacement/total time

v=\dfrac{14\ m}{12\ s}\\\\v=1.17\ m/s

4 0
3 years ago
Define Stokes law??<br><br><br><br>bored...........anyone free​
elena-14-01-66 [18.8K]

Answer:

A law stating that in fluorescence the wavelength of the emitted radiation is longer than that of the radiation causing it. This is not true in all cases.

Explanation:

3 0
3 years ago
Read 2 more answers
the base of a rectangular vessel measure 10m by 18cm. water is poured into a depth of 4cm. (a) what is the pressure on the base?
Alex787 [66]

Answer:

a) P =392.4[Pa]; b) F = 706.32[N]

Explanation:

With the input data of the problem we can calculate the area of the tank base

L = length = 10[m]

W = width = 18[cm] = 0.18[m]

A = W * L = 0.18*10

A = 1.8[m^2]

a)

Pressure can be calculated by knowing the density of the water and the height of the water column within the tank which is equal to h:

P = density * g *h

where:

density = 1000[kg/m^3]

g = gravity = 9.81[m/s^2]

h = heigth = 4[cm] = 0.04[m]

P = 1000*9.81*0.04

P = 392.4[Pa]

The force can be easily calculated knowing the relationship between pressure and force:

P = F/A

F = P*A

F = 392.4*1.8

F = 706.32[N]

4 0
3 years ago
What two quantities affect the force of attraction between two charges
miss Akunina [59]
1. the amount of electric charge that they carried
2. the distance between them
 
5 0
3 years ago
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