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DENIUS [597]
4 years ago
15

Joan is setting up an experiment in the lab to observe newton's second law of motion. she has a model car that has a mass of 45

kg, and it is accelerating at 7 m/s/s. she then increases the acceleration to 28 m/s/s. what happens to the force of the car?
Physics
1 answer:
Radda [10]4 years ago
8 0
The force of the car increases because it is proportional to the acceleration of the object (as stated in the second law). If the object accelerates then the force accelerates, if the acceleration decreases then the force decreases. Same for mass. The force of the car would have changed from 315 newtons of force to 1,260 newtons of force.
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A (nonconstant) harmonic function takes its maximum value and its minimum value
AURORKA [14]

Answer:

Explanation:

Consider that F (any function) <0 .

u(x,y) is a coontinuous function in the closed interval or region R.

Let us consider a point (p,q) that is inside the region and it is a maximum point.

Then it should be must

uxx (p,q) <0 where uxx means double differentiation

and uy(p,q) >0

Since ux(p,q) = 0 = uy(p,q) where ux and uy means single differentiation with respect to x and y respectively.

Say, Maximum limits of the region is T

therefore q<T

then uy (p,q) = 0 if q<T

if q = T then

point (p,q) = (p,T) will be on the boundary of R then we claim that

uy(p,q) >0

Similarly for the minimum also it will work

3 0
3 years ago
Global average temperature increases when energy absorbed by the surface ___?
MAXImum [283]

Answer:

se elevator a maas eneergia mas alta

8 0
3 years ago
When the net forces equal 0 N, they are which of the following? A. Balanced B. Unbalanced C. A push D. A pull
kvv77 [185]
When the net forces equal 0 Newtons, they are a balanced force.
5 0
3 years ago
A bird flies from the ground to a height of 200 m if the bird has a mass of 1.5 kg how much gravitational potential energy does
Serjik [45]
Gravitational potential energy is equal to (mgh) so 1.5•9.8•200=2940
Or C
3 0
3 years ago
Read 2 more answers
5. A student is investigating the relationship between pressure,
sergey [27]

Answer:

The <u>water vapor</u> will have the greatest entropy at the triple point

Explanation:

At the triple point of water, which has the properties of 0.0075°C temperature and 6.11657 mbar pressure, solid ice, liquid water and water vapor exist together in a location

According to Professor Stephen Lower on LibreTexts website entropy  is a measure the extent to which thermal energy is shared and spread in a system

The change in entropy, ΔS = ΔH/T

The heat change in \Delta H_{melting} = 6.01 kJ/mol

The heat change in vaporization, \Delta H_{vaporization} = 45.05 kJ/mol

The heat change in sublimation, \Delta H_{sublimation} = 51.06 kJ/mol

Therefore, the entropy of the water vapor S_{water \ vapor}} > The entropy of liquid water, S_{Liquid \ water} > The entropy of the solid ice, S_{Solid \, ice}

The portion with the highest entropy at the triple point is the water vapor

The water vapor will have the greatest entropy at the triple point

4 0
3 years ago
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