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netineya [11]
3 years ago
10

How can you differentiate between elements and compounds​

Physics
1 answer:
scZoUnD [109]3 years ago
6 0

Answer: An element is one singular molecule.

ie: Potassium

A compound is multiple elements fused together.

ie: Water or H2O

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A crane lifts a 1,750 kg mass using a steel cable whose mass per unit length is 0.88 kg/m. What is the speed of transverse waves
Sauron [17]

Answer:

139.6m/s

Explanation:

Calculate the tension first, T=m*g

mass(m): 1750kg, gravity(g): 9.8m/s^2

T= 1750*9.8

 =17150N

Then calculate the wave speed using the equation v = √ (T/μ)

v= √(17150N)/(0.88kg/m)

 =139.6m/s

4 0
3 years ago
What is the frequency heard by a person driving at 15 m/s toward a factory whistle emitting a
zmey [24]

Answer:

835.29 Hz

Explanation:

When moving towards the source of sound, frequency will be given by

f*=f(vd+v)/v

Where f is the freqiency of the source, vd is the driving speed, v is the speed of sound in air, f* is the inkown frequency when moving forward.

Substituting 800 Hz for f, 340 m/s for v and 15 m/s for vd then

f*=800(15+340)/340=835.29411764704 Hz

Rounded off, the frequency is approximately 835.29 Hz

4 0
3 years ago
What is one effect of the uneven heating of Earth caused by the Sun?
vladimir1956 [14]

Answer:

The uneven heating results in some of the atmosphere to be warmer than other parts and changes in volume and pressure which result in updrafts and can cause thunderstorms and other violent weather.

Explanation:

Generation of wind

8 0
3 years ago
Read 2 more answers
A variable that is not changed.
AleksAgata [21]

Answer:

A controlled variable does not change during a experiment

Explanation:

it's c

5 0
3 years ago
A train travels southwest from point A to point B through the Arizona desert at 55 mi/h. How far will the train travel six-and-a
TiliK225 [7]

Explanation:

Distance = speed × time

d = (55 mi/hr) (6.5 hr)

d = 357.5 mi

4 0
3 years ago
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