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avanturin [10]
3 years ago
11

Using a streak test on a mineral that is harder than 7 on Mohs scale would not be very useful True or False

Physics
1 answer:
aliya0001 [1]3 years ago
8 0

Answer: True true false true

Explanation:

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HELPPPPP !!!!
Nataly [62]

Your answer is C)

a)t=2.78 sec

b)R=835.03 m

c)

Explanation:

Given that

h= 38 m

u=300 m/s

here given that

The finally y=0

So

t=2.78 sec

The horizontal distance,R

R= u x t

R=300 x 2.78

R=835.03 m

The vertical component of velocity before the strike

4 0
2 years ago
A 10n force is applied to a 25kg mass to slide it across a frictional surface. What is the acceleration of the mass?
klasskru [66]

Answer: a = 0.4m/s^2 - 9.8*c where c is the coefficient of kinetic friction of the surface

Explanation: We know that, by the second Newton's law, a = F/m

where a is the acceleration, F is the net force and m is the mass of the object.

Then, if the surface is frictionless, the total force applied in the object is 10N, and the mass of the object is 25kg, so the acceleration is:

a =10N/25kg = 0.4m/s^2.

But if the surface is frictional, there will be a force of friction applied in the mass (this depends on the coefficient of friction and the weight of the mass), this means that the acceleration will be reduced.

If = -(9.8*25)*c

where c is a number that is bigger than 0 and smaller than 1, is called the coefficient of kinetic friction.

So the total force is now:

F = (10 - 9.8*25*c)

Then, the acceleration in a frictional surface is equal to:

a = (10 - 9.8*25*c)/25 = 0.4m/s^2 - 9.8*c

6 0
3 years ago
Read 2 more answers
ONLY TWO ANSWER CHOICES!!
Otrada [13]
A: Buoyant force is equal to the weight
3 0
3 years ago
Use the following terms in the same sentence:proton, neutron ,and isotope
UkoKoshka [18]
Atoms of the same element having equal numbers of protons, but different numbers of neutrons is called isotope.
8 0
3 years ago
What is loess?
Y_Kistochka [10]

A loess is...

<em>A clastic, silt-sized sediment that is formed by the accumulation of wind-blown dust. 10% of the earth's area is covered by loess or similar deposits. </em>

<em>Hope this helps you to find your answer and if you ever need help with anything else I would be happy to help,</em>

~QueenBeauty666~

5 0
2 years ago
Read 2 more answers
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