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mylen [45]
4 years ago
8

What is evaluating?

Physics
1 answer:
SSSSS [86.1K]4 years ago
3 0

Answer:

D. Drawing a conclusion about something

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Suppose humans have weights which are normally distributed with mean 170 lbs and SD 50 lbs. If 400 humans are selected at random
MrRa [10]

Answer:

 P(x< 175)= 0.9772

Explanation:

given,

mean weight of human = μ = 170 lbs

standard deviation = SD = 50 lbs

N = 400 humans

By using central limit theorem,

P (x< 175)

P(x< 175)= P(z

P(x< 175)= P(z

P (x< 175)= P(z

P (x< 175)= P(z

using z-table

 P (x< 175)= 0.9772

hence, the probability that total weight is less tan 175 lbs is equal to

 P(x< 175)= 0.9772

7 0
3 years ago
Help me please asap :(
mixer [17]
17. a
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19. a
20. c
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8 0
3 years ago
(i) (a) what is the force per meter of length on a straight wire carrying a 9.75 a current when perpendicular to a 0.81 t unifor
Andrew [12]
The force generated by a magnetic field B perpendicular to a wire carrying a current I is
F=ILB
where L is the length of the wire.

If we divide both sides for L, we get
\frac{F}{L}=IB
where the ratio on the left is the force per meter of length, which is exactly what we want to find. So:
\frac{F}{L}=IB=(9.75 A)(0.81 A)=7.90 N/m
5 0
4 years ago
Physics students study a piano being pulled across a room on a rug. They know that when it is at rest, it experiences a gravitat
Vanyuwa [196]
The static frictional force is greater than the kinetic frictional force, so the static frictional force is greater than 1200 N.
5 0
3 years ago
Read 2 more answers
In principle, the motion of a simple pendulum and an object on an ideal spring can both be used to provide the basic time interv
stich3 [128]

Answer:

Explanation:

The time period of the pendulum containing simple pendulum is given by

T = 2\pi \sqrt{\frac{L}{g}}

where, L is the length of the pendulum and g is the value of acceleration due to gravity.

The time period of the clock using the spring mechanism is given by

T = 2\pi \sqrt{\frac{m}{k}}

where, m is the mass of the block attached to the spring and k is the spring constant.

here we observe the time period of the pendulum depends on the value of acceleration due to gravity. The value of acceleration due to gravity decreases as we go on the heights that means when the clock is taken to the mountain, the value of g decreases and thus, the value of time period increases and the clock runs slow.

So, the clock containing the spring system gives the accurate reading rather than the clock containing simple pendulum.

5 0
3 years ago
Read 2 more answers
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