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4 years ago

Question 8, is it A or B?

Physics

1 answer:

Brrunno [24]4 years ago

7 0

Answer:

Explanation:

protons are the postive charge in your nucleus in the cell

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A pitcher releases a fastball that moves toward home plate.

Vsevolod [243]

The two additional forces that act on the ball as it travels between the pitcher and the home plate are air resistance and gravity.

<h3>What are the forces that affect object in motion;</h3>

Air resistance: this is the force that oppose the motion of an object in air due to frictional force
Gravity: this is the force due to weight of the object and acts downwards.

The two additional forces that act on the ball as it travels between the pitcher and the home plate include:

Air resistance and
Gravitational force

<h3>How the forces affect the motion of the ball</h3>

Air resistance oppose the motion of the ball as it travels in air.
Gravity is the force due to weight of the ball and acts downwards.

Learn more about forces on object in motion here: brainly.com/question/10454047

5 0

3 years ago

A force of 25 N acts on an object at an angle of 30 degrees above the horizontal. How much work does the force do if the object

8_murik_8 [283]

We can find the x-component of the force vector, so Fx = 25N(cos30). Then, we can sub this into the work equation W = Fs or W = Fd.
Therefore, W = (25N(cos30))(3m) = 64.95 J.
With sig figs, it is 60 J.

3 0

3 years ago

Minnie sota hits the end of a bar 1. 2 m long with a hammer. Sketch the standing wave on the bar for the following situations. T

ella [17]

(a) The wavelength of the wave for the fundamental mode is 2.4 m.

(b) The fundamental frequency of the wave is 2,708.33 Hz.

<h3>Wavelength of the wave for fundamental mode</h3>

The wavelength of the wave for the fundamental mode is calculated as follows;

Node to Node, N → N = λ/2

L = λ/2

λ = 2L

λ = 2 x 1.2

λ = 2.4 m

<h3>Fundamental frequency of the wave</h3>

The fundamental frequency of the wave is calculated as follows;

f = v/λ

f₀ = v/2L

f₀ = (6500)/(2 x 1.2)

f₀ = 2,708.33 Hz

The diagram of the wave for the fundamental mode is in the image uploaded.

Learn more about wavelength here: brainly.com/question/10728818

5 0

2 years ago

Expressing Experimental Error If the accepted value of π is 3.1416, what are the fractional error and the percent error of the e

LUCKY_DIMON [66]

Answer:

1) Δx = 0.16 m / s² , Δx = 9.72-9.8 = 0.08 m / s²

2) e% = 1.63% , , e% = 0.816%

3) 1e% = 0.04

Explanation:

The fractional error in a quantity is the absolute error between the accepted value of the quantity and the percentage error is the fractional error per 100

In this case, it is not indicated which is the measured experimental value of pi, suppose that a value of 3.142 is measured

fractional error

e = (ax - ax_average) / x_average

e = (3.142 - 3.1416) / 3.1416

e = 1.27 10⁻⁴

the percentage error is

% = e 100

% = 1.27 10-4 100

% = 1.27 10⁻²%

1) Δx = 9.96-9.8 = 0.16 m / s²

Δx = 9.72-9.8 = 0.08 m / s²

2) the percentage difference

x = 9.96 m / s2

e% = (9.96 - 9.80) / 9.80 100

e% = 1.63%

x = 9.72 m / s2

e% = (9.72 -9.80) / 9.80 100

e% = 0.816%

3) the mean value is

x_average = (x1 + x2) / 2

x_average = (9.96 + 9.72) / 2

x_average = 9.84 m / s2

e% = (9.84 - 9.80) / 9.80 100

1e% = 0.04

7 0

3 years ago

When a liquid is heated to a high temperature, it can become a gas. Which term is used to describe this change of state?

IrinaK [193]

Its called evaporation so its B

7 0

3 years ago