Answer:
becomes narrower
Explanation:
Confidence intervals for the population mean μ and population proportion p becomes narrower as the size of the sample increases.
As,the sample size increases,standard error decreases,so margin of error decreases and hence width of CI decreases.
Answer:
Potential energy is the energy that is stored in an object. ... When you park your car at the top of a hill, your car has potential energy because the gravity is pulling your car to move downward; if your car's parking brake fails, your vehicle may roll down the hill because of the force of gravity.
Answer:
m = 15 kg
Explanation:
Applied force to the cart, F' = 18 N
Force of friction, f = 15 N
Net force acting on the cart,
F = F' - f
F = 18 - 15
F = 3 N
The change in velocity of the cart is 1 m/s every 5 s.
We need to find the mass of the cart.
The formula of net force is given by :
F = ma, where a is the acceleration of the cart
So, the cart's mass is 15 kg.
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