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3 years ago

A larger truck takes more force to move What law of motion is it?

1 answer:

6 0

Newton's Second Law would probably best describe this.
F = ma
Where F = force
m = mass
a = acceleration

The force required is dependant on the mass, and where the mass is greater, the force required will be greater.

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What do we mean when we say the universe is expanding, and how does expansion lead to the idea of the big bang and our current e

lions [1.4K]

God made earth the big bang theory is not real

4 0

4 years ago

Determine the farthest away a car can be at night so that your eyes can resolve the two headlights. Assume that the the diameter

Zigmanuir [339]

Answer:

The farthest distance is $L_{max}=11.48 km$

Explanation:

The angular resolution is mathematically represented as

$\theta = \frac{Z}{L} = \frac{1.22 \lambda}{d}$

Where Z is the distance between the car head lamp with a value Z = 1.4 m

L is the distance between the eye and the car

$\lambda$ is the wavelength with a value 500 nm = $= 500 *10^{-9}m$

d is the diameter of the eye with a value d = 0.50 cm = $= \frac{0.50}{100} = 0.005m$

The maximum distance $L_{max}$ is given as

$L_{max} = \frac{(1.4) *0.005}{1.22 * (500 *10^{-9})}$

$= 11.48*10^{3}m$

$=11.48 km$

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8 0

4 years ago

Consider an electron with charge −e and mass m orbiting in a circle around a hydrogen nucleus (a single proton) with charge +e.

alexandr1967 [171]

Answer:

$v=\sqrt{k\frac{e^2}{m_e r}}$ , $2.18\cdot 10^6 m/s$

Explanation:

The magnitude of the electromagnetic force between the electron and the proton in the nucleus is equal to the centripetal force:

$k\frac{(e)(e)}{r^2}=m_e \frac{v^2}{r}$

where

k is the Coulomb constant

e is the magnitude of the charge of the electron

e is the magnitude of the charge of the proton in the nucleus

r is the distance between the electron and the nucleus

v is the speed of the electron

$m_e$ is the mass of the electron

Solving for v, we find

$v=\sqrt{k\frac{e^2}{m_e r}}$

Inside an atom of hydrogen, the distance between the electron and the nucleus is approximately

$r=5.3\cdot 10^{-11}m$

while the electron mass is

$m_e = 9.11\cdot 10^{-31}kg$

and the charge is

$e=1.6\cdot 10^{-19} C$

Substituting into the formula, we find

$v=\sqrt{(9\cdot 10^9 m/s) \frac{(1.6\cdot 10^{-19} C)^2}{(9.11\cdot 10^{-31} kg)(5.3\cdot 10^{-11} m)}}=2.18\cdot 10^6 m/s$

7 0

4 years ago

Explain how you would draw magnetic field lines in the vicinity of this magnet (it is a normal north and south magnet)

sammy [17]

Can someone please answer this question I'm doing the test now?

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3 years ago

Mangrove forests play an important role in _______.

AysviL [449]

D. All of the above

At high tide fish will feed among the mangrove roots - rich fishing ground

The trees trap sediment and soil in the river that would flow out to sea which also helps stop erosion

Wildlife utilise almost every part of the tree, with insects and birds, monkeys and lizards in the branches, shrimps and fish in the roots, and snails and clams in the soil

4 0

2 years ago