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Alex_Xolod [135]
3 years ago
9

What is an understood decimal

Physics
1 answer:
Citrus2011 [14]3 years ago
7 0
The decimal place accuracy of a number is the number of digits to the right of the decimal point. ... If there is no decimal point, it is understood to be after the last digit on the right and there is no place (zero place) accuracy. The significant digits of a number are those digits that are most accurate.
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A 3.9 kg crate is accelerated from 7.0 m/s to 9.5 m/s. What is the amount of work needed to accelerate the crate to the nearest
yKpoI14uk [10]
Force equals mass times acceleration
5 0
3 years ago
Consider a drug that is taken in 40 mg doses daily. suppose that the first dose is taken when t = 0 and that t is measured in ho
yulyashka [42]
There are 4 questions related to this problem:
1 If the half-life of the drug is 7.3 hours, what fraction of the drug remains in the patient after 24 hours?The amount of the drug is halved every 7.3-hour period, and 24 hours equals 24/7.3 of these halving periods. 
So the portion of the drug left over after 24 hours is (1/2) ^ (24/7.3) = 0.10224 2 Write a general expression for the amount of the drug in the patient immediately after taking the nth dose of the drug
One method is to combine the residual amounts from each amount, when the nth dose arises; this will contain adding a finite geometric series
So the total amount of the drug immediately after the nth dose, in mg, is An = 40+ 40(0.10224) + 40(0.10224)^2 + ... + 40(0.10244)^(n-1) 
An = 40[1 - (0.010224)^n]/(1 - 0.10224) 
3 Write a broad expression for the quantity of the drug in the patient directly before taking the nth dose of the drug
Pn = An – 40
= 40(0.10224) + 40(0.10224)^2 + ... + 40(0.10244)^(n-1) 
= 40(0.10224) [1 - (0.10224)^(n-1)]/(1 – 0.10224) 
= 4.0895 [1 - (0.10224)^(n-1)]
4 What is the long-term minimum amount of drug in the patient?
= lim n-->infinity of Pn 
= lim n-->infinity of 4.0895[1 - (0.10224)^(n-1)] 
= 4.0895(1 - 0) 
= 4.0895 mg. 
4 0
4 years ago
An object moves in a circular path at a constant speed. What is the relationship between the directions of the object's velocity
Reil [10]

Answer:

b

Explanation:

When an object is in circular motion, the direction of velocity is in the direction of tangent to the circle and acceleration is always directed towards the radial direction. This means that velocity is always perpendicular to acceleration of the object.

Hence option  (b)-The velocity and acceleration vectors are perpendicular is correct.

3 0
3 years ago
Glaciers, weather, and water shape Earth by _____.
Luden [163]
Glaciers, weather, and water shape Earth by (B.) the erosion.

Hope it helped you!

Have a great day!

-Charlie
6 0
3 years ago
Read 2 more answers
Light rays in a material with index of refrection 1.29 1.29 can undergo total internal reflection when they strike the interface
deff fn [24]

Answer:

The second material's index of refraction is 1.17.

Explanation:

Given that,

Refractive index of the material, n = 1.29

Critical angle is 65.9 degrees.

We need to find the second material's index of refraction. We know that at critical angle of incidence, angle of refraction is equal to 90 degrees. Using Snell's law as:

n_1\sin \theta_c=n_2\sin (90)\\\\n_2=n_1\sin \theta_c\\\\n_2=1.29\times \sin (65.9)\\\\n_2=1.17

So, the second material's index of refraction is 1.17.

7 0
3 years ago
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