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jonny [76]
3 years ago
11

4. With a diameter that's 11 times larger than Earth's, _______ is the largest planet.

Physics
1 answer:
Komok [63]3 years ago
7 0

The answer is B.Jupiter

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A ramp is used to load furniture onto a moving truck. The person does 1240 J of work pushing
Len [333]

Answer:

The efficiency of the ramp is, Eff = 6.63 %

Explanation:

Given,

The work done by the person pushing the furniture up the ramp is, W₁ = 1240 J

The work done by the ramp is, W₀ = 822 J

The efficiency of the ramp is given by the formula,

                                 <em> Eff = ( W₀ / W₁ ) x 100%</em>

                                        = ( 822 / 12400 ) x 100%

                                        = 6.63 %

Hence, the efficiency of the ramp is, Eff = 6.63 %

6 0
3 years ago
The law of reflection is quite useful for mirrors and other flat, shiny surfaces. (This sort of reflection is called specular re
Sever21 [200]

Answer:

Explanation:

Suppose initially the plane was horizontal and light was reflected back at some angle θ from the normal .

Now the reflecting surface is twisted so that is becomes inclined at angle alpha .

The reflected light will be deviated from its original direction by angle

2 x alpha .

Similarly when the reflecting surface is further twisted so that it becomes inclined at angle beta then again the reflected beam will deviated by angle

2 x beta

Hence angle between these two reflected beam

= 2 beta - 2 alpha

= 2 ( β - α )

So, angular separation between the rays reflected from the two surfaces

= 2 ( β - α ) .

5 0
3 years ago
A 0.25-kg ball attached to a string is rotating in a horizontal circle of radius 0.5 m twice every second, what is the tension i
Svetradugi [14.3K]

Answer:

T = 19.75 N

Explanation:

given,

mass of ball = 0.25 Kg

radius = 0.5 m

frequency = 2 s⁻¹

tension in the string = ?

angular velocity

ω = 2 π f

ω = 2 π x 2

ω = 12.57 rad/s

tension on the string is equal to the centripetal force

T = m ω² r

T = 0.25 x 12.57² x 0.5

T = 19.75 N

Tension in the string is equal to T = 19.75 N

3 0
3 years ago
You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to h
Ber [7]
20km every 1 hr is what 20km/hr means.

so 3hrs is 20km*3=60km.
6 0
3 years ago
What is the lupac<br>name<br>H3C – CHT<br>the H₂ - CH - CH2<br>CH₂<br>CH₂<br>CH3​
dimulka [17.4K]

Answer:??

Explanation:

5 0
3 years ago
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