3 years ago

An object traveling at a constant speed has balanced forces?

Physics

1 answer:

Orlov [11]3 years ago

5 0

An object is moving at a constant speed in a straight line, the forces are balanced

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Calculate the change in temperature of 20 kg of water if 30 kg of aluminum is dropped in the water and the aluminum changes temp

vivado [14]

<span>ΔE = 0

(m_alum) (c_alum) Δt - (m_water)(c_water) Δt' = 0

(30) (897) (20) - (20)(4186) Δt' = 0

Δt' = 6.42857 °C</span>

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4 years ago

Two large parallel conducting plates are 8.0 cm apart and carry equal but opposite charges on their facing surfaces. The magnitu

Pepsi [2]

Answer:

18.1 V

Explanation:

The electric field between two parallel plates is given by the equation:

$E=\frac{\sigma}{\epsilon_0}$

where

$\sigma$ is the charge surface density

$\epsilon_0 = 8.85\cdot 10^{-12} F/m$ is the vacuum permittivity

For the plates in this problem,

$\sigma = 2.0 nC/m^2 = 2.0\cdot 10^{-9} C/m^2$

So, the magnitude of the electric field is

$E=\frac{2.0\cdot 10^{-9}}{8.85\cdot 10^{-12}}=226.0 V/m$

Now we can find the potential difference between the plates, which is given by

$\Delta V = E d$

where

d = 8.0 cm = 0.08 m is the separation between the plates

Substituting,

$\Delta V=(226.0)(0.08)=18.1 V$

8 0

3 years ago

A hiker yells out "Hello!" into a canyon. If the echo of their voice

Tasya [4]

D 193 is the right answer if not try c because it is in between them both

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3 years ago

at 25°c three moles of gas occupy a volume of 4.0L at 1.9 kpa. if the volume increases to 8.0L what will the new pressure be

ki77a [65]

Answer:0.95kPa

Explanation:

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3 years ago

A Ping-Pong ball has a mass of 2.3 g and a terminal speed of 9.2 m/s. The drag force is of the form bv2 What is the value of b?

Bingel [31]

Drag force is a force that resist the motion of a certain body through a fluid like air or water. This can be calculated through the equation,
D = 0.5Cρv²
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b = 0.5Cρ

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3 years ago