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2 years ago

If a chemical spill reaches groundwater, the availability of which resource will be reduced for people in the area?

Physics

1 answer:

Alenkinab [10]2 years ago

4 0

The answer is fish I’ve had this question before

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An 85.0 kg fisherman jumps from a dock at a speed of 4.30 m/s onto their 135.0 kg boat. If the boat was at rest to begin but mov

jeka94

Answer:

Final speed of boat + man is 1.66 m/s

Explanation:

As we know that there is no friction on the system or there is no external force on this system

So here we can use momentum conservation here

$mv = (m + M)v_f$

so we have

m = 85 kg

M = 135 kg

v = 4.30 m/s

now we have

$85 \times 4.30 = (85 + 135) v$

$v = 1.66 m/s$

4 0

2 years ago

During World War II, mass spectrometers were used to separate the radioactive uranium isotope U-235 from its far more common iso

mariarad [96]

Answer:

21.55 m

Explanation:

6 0

2 years ago

How do charges act on insulators and conductors?

umka2103 [35]

Answer:

An insulator holds charge within its atomic structure. Objects with like charges repel each other, while those with unlike charges attract each other. A conducting object is said to be grounded if it is connected to the Earth through a conductor.

Explanation:

Source:https://courses.lumenlearning.com/physics/chapter/18-2-conductors-and-insulators/

5 0

3 years ago

An airplane traveling at half the speed of sound emits a sound of frequency 4.68 kHz. (a) At what frequency does a stationary li

kkurt [141]

Answer:

(a) 9.36 kHz

(b) 3.12 kHz

Explanation:

(a)

V = speed of sound

$v$ = speed of airplane = (0.5) V

f = actual frequency of sound emitted by airplane = 4.68 kHz = 4680 Hz

f' = Frequency heard by the stationary listener

Using Doppler's effect

$f' = \frac{Vf}{V-v}$

$f' = \frac{V(4680)}{V-(0.5)V)}$

f' = 9360 Hz

f' = 9.36 kHz

(b)

V = speed of sound

$v$ = speed of airplane = (0.5) V

f = actual frequency of sound emitted by airplane = 4.68 kHz = 4680 Hz

f' = Frequency heard by the stationary listener

Using Doppler's effect

$f' = \frac{Vf}{V+v}$

$f' = \frac{V(4680)}{V+(0.5)V)}$

f' = 3120 Hz

f' = 3.12 kHz

6 0

3 years ago

Which statement is true about the gravitational force?

topjm [15]

Hello,

I think that A is the right one.

6 0

3 years ago

Read 2 more answers