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LUCKY_DIMON [66]
3 years ago
9

If you and your friend EACH apply 55N of force pushing against a wall for 10 minutes. How much work did you do? ​

Physics
1 answer:
iris [78.8K]3 years ago
8 0

Answer:

0 Joules

Explanation:

If you are pushing against a wall, the wall is not moving, so no work is being done.

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When electrons are removed from an atom, the atom becomes positively charged and is referred to as a(n)
sesenic [268]

Answer is Cation

whilst an anion is the one that is negatively charged after gaining electrons

7 0
3 years ago
For copper, ρ = 8.93 g/cm3 and M = 63.5 g/mol. Assuming one free electron per copper atom, what is the drift velocity of electro
viktelen [127]

Answer:

V_d = 1.75 × 10⁻⁴ m/s

Explanation:

Given:

Density of copper, ρ = 8.93 g/cm³

mass, M = 63.5 g/mol

Radius of wire = 0.625 mm

Current, I = 3A

Area of the wire, A = \frac{\pi d^2}{4} = A = \frac{\pi 0.625^2}{4}

Now,

The current density, J is given as

J=\frac{I}{A}=\frac{3}{ \frac{\pi 0.625^2}{4}}= 2444619.925 A/mm²

now, the electron density, n = \frac{\rho}{M}N_A

where,

N_A=Avogadro's Number

n = \frac{8.93}{63.5}(6.2\times 10^{23})=8.719\times 10^{28}\ electrons/m^3

Now,

the drift velocity, V_d

V_d=\frac{J}{ne}

where,

e = charge on electron = 1.6 × 10⁻¹⁹ C

thus,

V_d=\frac{2444619.925}{8.719\times 10^{28}\times (1.6\times 10^{-19})e} = 1.75 × 10⁻⁴ m/s

4 0
3 years ago
Read 2 more answers
A high-intensity portable lantern is powered by several batteries that are connected in series. The lantern’s bulb uses 86 W of
maxonik [38]

Answer:

28.6666666667 or 29

Explanation:

the formula for voltage (if power is involved)

V = P/i

86 ÷ 3

28.6666666667

if you want your can round to get a more simple answer

29

5 0
4 years ago
An old clock has a spring that must be wound to make the clock hands move. Which statement describes the energy of the spring an
topjm [15]

Answer:

c

Explanation:

neither the spring or hands are in the action of movemnet

8 0
3 years ago
How is shooting a shotgun related to newtons third law ? why does a rifle have less “kick” then a shotgun ?
Mazyrski [523]
Newton’s third law is a force is a push or pull that acts upon an object as a result of another object.. A shot gun when fired pulls back when a force (you pulling the trigger) is acted upon it. This is how it relates. A rifle has less kick than a shot gun because the rifle is smaller and has less of a force than a shot gun.
5 0
3 years ago
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