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3 years ago

What would happen if you try to put two balloons with the same charge together

Physics

2 answers:

iris [78.8K]3 years ago

5 0

They would repel because of there same charge

ivanzaharov [21]3 years ago

3 0

Answer:

they would repel because they have the same charge. Charges that are different will stick together.

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2000, the Millennium Bridge, a new footbridge over the River Thames in London, England, was opened to the public. However, after

sweet [91]

Answer:

n = 1810

A = 25 mm

Explanation:

Given:

Lateral force amplitude, F = 25 N

Frequency, f = 1 Hz

mass of the bridge, m = 2000 kg/m

Span, L = 144 m

Amplitude of the oscillation, A = 75 mm = 0.075 m

time, t = 6T

now,

Amplitude as a function of time is given as:

$A(t)=A_oe^{\frac{-bt}{2m}}$

or amplitude for unforce oscillation

$\frac{A_o}{e}=A_oe^{\frac{-b(6T)}{2m}}$

$\frac{6bt}{2m}=1$

$b=\frac{m}{3T}$

Now, provided in the question Amplitude of the driven oscillation

$A=\frac{F_{max}}{\sqrt{(k-m\omega_d^2)+(b\omega_d^2)}}$

the value of the maximum amplitude is obtained $(k=m\omega_d^2)$

thus,

$A=\frac{F_{max}}{(b\omega_d}$

Now, for n people on the bridge

Fmax = nF

thus,

max amplitude

$0.075=\frac{nF}{((\frac{m}{3T})2\pi}$

n = 1810

hence, there were 1810 people on the bridge

b) $A=\frac{F_{max}}{(b\omega_d}$

since the effect of damping in the millenium bridge is 3 times

thus,

b=3b

therefore,

$A=\frac{F_{max}}{(3b\omega_d}$

$A=\frac{1}{(3}A_o$

$A=\frac{1}{(3}0.075$

A = 0.025 m = 25 mm

6 0

3 years ago

Calculate the heat gained by 100 grams of ice at -20°C in order to become water at 50°C. ( C = .5 for ice and C = 1 for water, Q

Korvikt [17]

Answer:

$6008$ cal

Explanation:

$m_{i}$ = mass of ice = 100 g = 0.1 kg

$c_{i}$ = specific heat of ice = 0.5 cal/(kg°C)

$c_{w}$ = specific heat of water = 1 cal/(kg°C)

$L$ = Latent heat of fusion of ice = 80 J/g

$T_{i}$ = initial temperature of ice = - 20 °C

$T_{f}$ = final temperature of ice = 50 °C

Q = Heat gained

Heat gained is given as

$Q = m_{i} c_{i}(0 - (T_{i}))+ m_{i}L + m_{i}c_{w}(T_{i} - 0)$

$Q = (100) (0.5) (0 - (- 20))+ (0.1)(80) + (100) (1)(50 - 0)$

$Q = 6008$ cal

8 0

4 years ago

How far does a 26" bicycle wheel travel at 8 miles per hour?

Luda [366]

Well if it was traveling for an hour then the answer is 8 miles.

8 0

4 years ago

Read 2 more answers

Someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (The block of wood is sitting on a frictionless sur

d1i1m1o1n [39]

Answer:

The speed of bullet and wooden bock coupled together, V = 22.22 m/s

Explanation:

Given that,

Mass of the bullet, m = 0.04 Kg

Mass of the wooden block, M = 0.5 Kg

The initial velocity of the bullet, u = 300 m/s

The initial velocity of the wooden block, U = 0 m/s

The final velocity of the bullet and wooden bock coupled together, V = 0 m/s

According to the conservation of linear momentum, the total momentum of the body after impact is equal to the total momentum before impact.

Therefore,

mV + MV = mu + MU

V(m+M) = mu

V = mu/(m+M)

Substituting the values in the above equation,

V = 0.04 Kg x 300 m/s / (0.04 Kg+ 0.5 Kg)

= 22.22 m/s

Hence, the speed of bullet and wooden bock coupled together, V = 22.22 m/s

8 0

3 years ago

Newton's second law of motion describes inertia.<br> True<br> False

ladessa [460]

False. the first law describes inertia

7 0

4 years ago

Read 2 more answers