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You can report sexual harassment to all of the above.

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Dr. james van allen and his group of united states scientists discovered a set of ___________.

Lubov Fominskaja [6]

The answer is Radiation Belts.

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4 years ago

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What is science explain

vladimir2022 [97]

Answer:

Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Scientific methodology includes the following: ... Evidence. Experiment and/or observation as benchmarks for testing hypotheses.

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3 years ago

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A ball of 0.5kg slows down from 5m/s to 3m/s. Calculate the work done in the process

ivann1987 [24]

Answer: Cannot determine cause we need to know the change of time to calculate the work.

Explanation:

m = 0.5kg

V = 3m/s - 5m/s = -2m/s

P = W/t = Fv

F = ma

W = Fvt

W = (0.5)(9.8)t = 4.9t

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2 years ago

A boat moves through the water with two forces acting on it. One is a 2000 N forward push by the water on the propeller, and the

jekas [21]

Answer:

a). a=0.2 $\frac{m}{s^{2} }$

b). x=10m

c). v=2 $\frac{m}{s}$

Explanation:

Force forward push = 2000N

Resistive force due water=1800N

Net force=2000N-1800N

Fn=200N

m=1000kg

t=10sec

a).

$F_{n} =m*a\\a=\frac{F_{n}}{m}\\ a=\frac{200N}{1000kg}\\ a=0.2 \frac{m}{s^{2} }$

b).

$x_{f}=x_{o}+ v_{o}*t+\frac{1}{2}*a*t^{2}\\x_{o}=0\\v_{o}=0\\x_{f}=\frac{1}{2}*a*t^{2}\\x_{f}=\frac{1}{2}*0.2*(10)^{2} \\x_{f}=10m$

c).

$v_{f}=v_{o}+a*t\\v_{o}=0\\v_{f}=a*t\\v_{f}=0.2\frac{m}{s^{2} }*10s\\v_{f}=2\frac{m}{s}$

3 0

3 years ago

A concave lens has a focal length of -31 {cm}. Find the image distance and magnification that results when an object is placed 2

kolezko [41]

Answer:

The value is $v = 440 \ cm$

and

$m = 16$

Explanation:

From the question we are told that

The image distance is $v = 29 \ cm$

The focal length is $f = -31 \ cm$

From the lens equation we have that

$\frac{1}{f} = \frac{1}{v} - \frac{1}{u}$

=> $\frac{1}{-31} = \frac{1}{v} - \frac{1}{29}$

=> $v = 450 \ cm$

Generally the magnification is

$m = \frac{v}{u}$

=> $m = \frac{ 450}{29}$

=> $m = 16$

7 0

3 years ago