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3 years ago

Physics class 9 chapter 8 please tell please

Physics

1 answer:

natali 33 [55]3 years ago

7 0

Answer:

(a) The motion is uniform

(b) 11.11 m/s

Explanation:

(a)

From the table below, the motion of the bus is uniform.

(b)

Speed(s) = Δd/Δt

s = Δd/Δt............. Equation 1

From the table,

Given: Δd = 10 km = 10000 m, Δt = 15 minutes = (15×60) = 900 seconds

Substitute these values into equation 1

s = 10000/900

s = 11.11 m/s

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The eccentricity of an asteroid's orbit is 0.0442, and the semimajor axis is 1.12 x 1011 m. The Sun's center is at one focus of

nadezda [96]

Answer:

a. $d=99x10^{8}m$

b. $r=14.22 R_s$

Explanation:

The eccentricity of an asteroid's is 0.0442 so

to find the focus distance between both focus is

$d=2*e*a$

$e=1.12x10^{11}m\\a=0.0442$

So replacing numeric

$d=2*1.12x10^{11}m*0.0442=9900800000$

$d=99x10^{8}m$

Now to find the ratio of that distance between the solar radius and the distance

$r=\frac{d_1}{d_s}$

$r=R_s*\frac{99x10^8m}{6.96x10^8m}$

$r=14.22 R_s$

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4 years ago

2. Determine the units of the quantity described by each of the following

notka56 [123]

Explanation:

a.) kg(m/s)(1/s) = force (N)

b.) (kg/s)(m/s) = force (N)

c.) (kg/s)(m/s) = force (N)

d.) (kg/s)(m/s) = force (N)

3 0

3 years ago

What is the acceleration of a sinking rock if it has a mass of 0.25 kg and has a net force of 0.44 N acting on it?

charle [14.2K]

Answer: 1.76 m/s²

Explanation:

F = mass x acceleration

0.44 N = (0.25)(a)

0.44/0.25 = 1.76

a = 1.76

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3 years ago

DNA ___ occurs during the s phase of Interphase.

diamong [38]

Answer:

Explanation:

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A small uniform disk and a small uniform sphere are released simultaneously at the top of a high inclined plane, and they roll d

barxatty [35]

Answer:

(D) the sphere

Explanation:

The bodies given are Disk and Solid sphere (uniform sphere)

Moment of inertia of the bodies are

I(disk) = $\frac{MR^2}{2}$

I(sphere) = $\frac{2MR^2}{5}$

Since the moment of inertia of sphere is less than that of disk, therefore sphere will reach the bottom first.

3 0

3 years ago

Physics class 9 chapter 8 please tell​ please

Physics class 9 chapter 8 please tell please