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Oksanka [162]
3 years ago
9

Average velocity is different than average speed because calculating average velocity involves

Physics
1 answer:
Artemon [7]3 years ago
8 0

Answer:

calculating displacement.

Explanation:

It's not true that displacement and distance would be the same always. Displacement is always smaller than or equal to distance as it is the smallest path between the initial and final point whereas distance is the measure of the total path covered.

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Through what media does mechanical waves move
Aleks [24]
A mechanical wave moves through all matter
6 0
3 years ago
you weight 650 N. What would you wieght if the Earth were four times as massive as it is and its raduis were three times its pre
LiRa [457]

To solve this problem we will apply the concept given by the law of gravitational attraction, which properly defines gravity under the function

g = \frac{GM}{r^2}

Here,

G = Gravitational Universal Constant

M = Mass of Earth

r = Distance between the human and the center of mass of the Earth

The acceleration due to gravity when is 4 times the mass of Earth and 3 times the radius would be given as,

g_1 = \frac{GM}{r^2}

g_2 = \frac{G(4M)}{(3r)^2}

g_2 = \frac{4GM}{9r^2}

g_2 = \frac{4}{9} g_1

The weight is defined as

W = mg_1

So the new weight would be given as

W' = mg_2

W' = m(\frac{4}{9} g_1 )

W' = \frac{4}{9} mg_1

W' = \frac{4}{9} W

W' = \frac{4}{9}(650)

W' = 288.8N

Therefore the weight under this condition is 288.8N

5 0
3 years ago
A bar of silicon is 4 cm long with a circular cross section. If the resistance of the bar is 280 Ω at room temperature, what is
monitta

Answer:

r = 17.05 cm

Explanation:

Given that,

Length of silicon bar is 4 cm or 0.04 m

Resistance of the bar is 280 ohms

We know that the resistivity of the silicon is 640 Ωm

We need to find the cross-sectional radius of the bar. Let it is r.

Using definition of resistance of an object. It is given by :

R=\rho\dfrac{l}{A}

A is area of bar, A = πr²

So,

R=\rho\dfrac{l}{\pi r^2}\\\\r^2=\dfrac{\rho l}{R\pi}\\\\r^2=\dfrac{640\times 0.04}{280\pi}\\\\r=0.1705\ m\\\\r=17.05\ cm

So, the cross-sectional radius of the bar is 17.05 cm.

4 0
4 years ago
Which formula can be used to find the tangential speed of an orbiting object?
emmasim [6.3K]

Answer: A.) v = 2πr/T

Explanation:

The tangential speed of an orbiting object can be obtained by the product of the radius of the orbit and the angular speed of the object in a circular motion.

This the tangential seed can be represented mathematically as :

Tangential speed (v) = angular speed(ω) × radius(r)

v = r × ω --------(1)

Recall:

ω = 2π/T

Substituting ω = 2π/T in equation (1)

v = r × 2π/T

v = 2πr/T

5 0
4 years ago
Hi my points are free. im quitting so take em all
noname [10]

Answer:

why are you quitting ?????

Explanation:

3 0
3 years ago
Read 2 more answers
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