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3 years ago

What is the average rate of change for this exponential function for the interval from x = 2 to x= 4 ?

Physics

2 answers:

irina [24]3 years ago

8 0

The answer is D. 6 . This is because it is a positive slope so you can cancel out B and C and then, you count your boxes

fiasKO [112]3 years ago

7 0

Answer:

Option D) 6

Explanation:

As we know that average rate of change will be given by

$Rate = \frac{\Delta y}{\Delta x}$

now here we know that

at x = 2 the value of y coordinate will be 4

also at x = 4 the value of y coordinate will be 16

now we know that

$Rate = \frac{y_2 - y_1}{x_2 - x_1}$

$Rate = \frac{16 - 4}{4 - 2}$

$Rate = 6$

so rate of change of Y coordinate with respect to x coordinate will be 6

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28. Identify whether the following objects are in

Marianna [84]

Answer:

a. A baseball after it has been hit - not in free fall

b. A rock that is thrown in the air - not in free fall

c. The moon - free-fall

d. A paper airplane - not in free fall

e. A bird flying - not in free fall

Explanation:

The free-fall is defined as the falling of an object due to the action of gravity. The object is not experiencing any other force neglecting the air resistance.
If an object is in free-fall, the direction of its motion is directed towards the center of the earth. It does not have a horizontal component of velocity.
If the body is under free-fall, but a centripetal force acts on it where it is equal to the gravitational force at that point. The object will have two components of velocity along the tangential line, perpendicular to the radius of the orbit.

a. A baseball after it has been hit - not in free fall according to point 1 & 2.

b. A rock that is thrown in the air - not in free fall according to point 1.

c. The moon - free-fall according to point 3.

d. A paper airplane - not in free fall according to point 1 & 2.

e. A bird flying - not in free fall according to point 1 & 2.

7 0

3 years ago

A boy exerts a 36-N horizontal force as he pulls a 52-N sled across a cement sidewalk at a constant speed. What is the coefficie

Vesna [10]

Answer:

0.69

Explanation:

Sum of the forces on the sled in the y direction:

∑F = ma

Fn - 52 N = 0

Fn = 52 N

Sum of the forces on the sled in the x direction:

∑F = ma

36 N - Fn μ = 0

Fn μ = 36 N

μ = 36 N / Fn

Substitute:

μ = 36 N / 52 N

μ = 0.69

7 0

3 years ago

Read 2 more answers

A 5.6 cm diameter parallel-plate capacitor has a 0.58 mm gap. What is the displacement current in the capacitor if the potential

BARSIC [14]

Answer:

$1.88\cdot 10^{-5} A$

Explanation:

The capacitance of a parallel plate capacitor is given by:

$C=\frac{\epsilon_0 A}{d}$ (1)

where

$\epsilon_0$ is the vacuum permittivity

A is the area of the plates

d is the separation between the plates

The charge stored on the capacitor is given by

$Q=CV$ (2)

where C is the capacitance and V is the voltage across the capacitor.

The displacement current in the capacitor is given by

$J=\frac{Q}{t}$ (3)

where t is the time elapsed

Substituting (1) and (2) into (3), we find an expression for the displacement current:

$J=\frac{CV}{t}=\frac{\epsilon_0 A}{d} \frac{V}{t}$

where we have

$A=\pi (\frac{d}{2})^2=\pi (\frac{0.056 m}{2})^2=2.46\cdot 10^{-3} m^2$

$d = 0.58 mm = 5.8\cdot 10^{-4} m$

$\frac{V}{t}=500,000 V/s$

Substituting into the equation, we find

$J=\frac{(8.85\cdot 10^{-12} F/m)(2.46\cdot 10^{-3} m^2)}{5.8\cdot 10^{-4}m}(500,000 V/s)=1.88\cdot 10^{-5} A$

6 0

3 years ago

What is the function of the phytoplankton in ocean ecosystems?

vesna_86 [32]

Ok ok! It's A. Producer

5 0

3 years ago

What is the mass defect of lithium? Assume the following: Atomic number of lithium = 3 Atomic mass of lithium = 7.0144 atomic ma

Mice21 [21]

3 protons x 1.0073amu = 3.022 
4 neutrons x 1.0087amu = 4.035 

mass = 7.0567amu 
mass defect = 7.0567 - 7.0144 = 0.0423amu.....B with your mass of Li

6 0

3 years ago