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nika2105 [10]
3 years ago
7

7. Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a

Physics
1 answer:
patriot [66]3 years ago
4 0

Answer:

222.3 s

Explanation:

From Newton’s law, F=ma hence a=\frac {F}{m}

a=\frac {31}{65000}=0.000477

Time, t=\frac {\triangle v}{acceleration}

Where \triangle v is change in velocity

The change in velocity is equivalent to 0.106 m/s

t=\frac {0.106}{0.000477}=222.2581

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For a demonstration, a professor uses a razor blade to cut a thin slit in a piece of aluminum foil. When she shines a laser poin
Art [367]

Answer:

width of slit(a)≅ 0.1mm

Explanation:

Wave length of laser pointer =λ = 685 nm

Distance between screen and slit = L = 5.5 m

Width of bright band = W=8.0cm=0.08m

width of slit=a

recall the formula;

W=(2λL)/a

a=2λL/W

a=(2 *685*10⁻⁹*5.5m)/0.08m

a=7535*10⁻⁹/0.08

a=94187.5 *10⁻⁹

a=0.0000941875m

a=0.0941875mm

a≅0.1mm

5 0
3 years ago
Read 2 more answers
Help me find the answer from the given options. ​
jonny [76]

Note: If the question asked for work done by the car, then it will be equal to the kinetic energy of the body.

6 0
3 years ago
Plz help me
Reil [10]

Answer:

Yes

Explanation:

When an object has more mass it takes more gravity to keep it down therefore producing friction which in return reduces the amount of kinetic energy created. A change in an object's speed has an greater effect on its kinetic energy. than a change in its mass has, because kinetic energy is proportional to.

3 0
4 years ago
Determine the components, the magnitude and the angle (counter-clockwise with respect to the positive x axis) of the resultant v
LenKa [72]

Answer:

Explanation:

We shall represent vector B and C in terms of i and j .

B = 5 cos115 i + 5 sin115 j

= -2.11 i + 4.53j

Similarly

C = 4 cos255 i + 4 sin225 j

= -1.04 i -3.86 j

R = B + C

= -2.11 i + 4.53j  -1.04 i -3.86 j

= -3.15 i + .67 j

magnitude of R

= √( 3.15² + .67² )

= √( 9.92 +.45 )

= 3.22

Angle Ф

TanФ = - .67 / 3.15

= - .21

Ф = - 12⁰

= 180 - 12

= 168 degree counterclockwise from positive x axis.

3 0
3 years ago
A description of a phenomenon
Shalnov [3]

Answer:

A phenomenon is an extraordinary occurrence or circumstance. ... Like many words with Greek roots, phenomenon started out as a science term. Scientists used it (and still do) to describe any event or fact that could be observed, amazing or not.

Explanation:

도움이 되기를 바랍니다.... 미리 환영합니다.

6 0
3 years ago
Read 2 more answers
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