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belka [17]
3 years ago
8

A particle is moving along the x-axis so that its position at any time t is greater than and equal to 0 is given by x(t)=2te^-t?

Physics
1 answer:
erastovalidia [21]3 years ago
6 0
For speed you can differentiate the equation, for acceleration you can again differentiate the equation .
at t=0 the particle is slowing down , when you get equation for velocity put t=0 then only -1 is left
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The resistance of the coil of a
ololo11 [35]

Answer:

54 is the correct answer to this question

7 0
3 years ago
If you see orange construction signs and cones on a freeway, you must:
dimaraw [331]
Reduce speed or slow down.

Orange signs and cones are usually present when a path is diverted or is not entirely available for cars to drive on. The diversion may be due to hazards present due to the construction or for the safety for the construction workers. One must slow down when passing through such construction zones in order to prevent collisions and injuries.
7 0
4 years ago
A 50.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300 and the
Dimas [21]

Answer:

98N and 147N

Explanation:

We have the following information:

m=50kg\\\mu_s =0.4\\\mu_k = 0.2\\F=140N

We can find the static fricton force as follow,

F=\mu_s * N

Where N is the normal force (mg)

F=0.3*50*9.8\\F=147N

Static friction force at 147N is greater than the force applied hence body does not move.

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3 0
4 years ago
The iron content of iron ore can be determined by titration with a standard solution. The iron ore is dissolved in , and all the
GalinKa [24]

Answer:

2.11 %

Explanation:

In acidic medium iron is in Fe ⁺³ oxidation state .

Equivalent weight = 56 / 3

= 18.33 gm

acid used in titration

= 16.37 mL of .0233 M

= 16.37 x .0233 mL of M soln

= .38 mL of M soln

.38 mL of M soln reacts with .3298 gm of ore

1000 mL of M soln = (.3298 / .38)  x 1000 gm of iron ore

867.89 gm

This must contain one gm equivalent of iron

or 18.33 gm

867.89 gm of ore contains 18.33 gm of iron

mass % of iron in the given ore

= (18.33 / 867.89)  x 100

= 2.11 %

7 0
3 years ago
What is the function of the cardiovascular system?
Lena [83]
The main function of the cardiovascular system is therefore to maintain blood flow to all parts of the body, to allow it to survive. Veins deliver used blood from the body back to the heart.
7 0
3 years ago
Read 2 more answers
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