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3 years ago

Type the correct answer in the box. Spell the word correctly.

Physics

1 answer:

Veronika [31]3 years ago

6 0

Answer:

Vaccination is the procedure by which a person can be immunized against a disease.

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If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?

creativ13 [48]

Mechanical energy i think will form

4 0

3 years ago

Read 2 more answers

A thin, uniform stick of length 1.9 m and mass 3.1 kg is pinned through one end and is free to rotate. The stick is initially ha

nirvana33 [79]

Answer:

The acceleration is $\alpha = 7.10 \ rad/s^2$

Explanation:

From the question we are told that

The length of the stick is $d = 1.9 \ m$

The mass of the stick is $m = 3.1 \ kg$

The angular displacement is $\theta = 23.4^o$

Generally the torque of this uniform stick after this displacement is mathematically represented as

$\tau = \frac{1}{2} * d * [m*g]* sin (90 - \theta)$

$\tau = \frac{1}{2} * 1.9 * [3.1*9.8]* sin (90 - 23.4)$

$\tau = 26.49 \ kg\cdot m^2 \cdot s^{-2}$

Generally the moment of inertia of the uniform stick is mathematically represented as

$I = \frac{1}{3} * m * d^2$

=> $I = \frac{1}{3} * 3.1 * 1.9 ^2$

=> $I = 3.73 \ kg \cdot m^2$

Generally the angular acceleration is mathematically represented as

$\alpha = \frac{\tau}{I}$

=> $\alpha = \frac{26.49}{3.73}$

=> $\alpha = 7.10 \ rad/s^2$

7 0

3 years ago

What is the spring potential energy of a spring that is stretched 15 cm if its spring constant is 350 n/m?

VladimirAG [237]

Answer:

Spring potential energy = 7.875Nm

Explanation:

Given the following data;

Extension, e = 15cm to meters = 15/100 = 0.15m

Spring constant, k = 350n/m

To find the force;

Force = spring constant * extension

Force = 350 * 0.15

Force = 52.5 Newton.

Now to find the spring potential energy we would use the formula below;

Spring potential energy = force * extension

Substituting into the equation, we have;

Spring potential energy = 52.5 * 0.15

Spring potential energy = 7.875Nm

6 0

3 years ago

If the current through a 20-Ω resistor is 8.0 A , how much energy is dissipated by the resistor in 1.0 h ? Express your answer w

marshall27 [118]

Answer:

$P(3600)=593.247W$

Explanation:

First, let's find the voltage through the resistor using ohm's law:

$V=IR=20*8=160V$

AC power as function of time can be calculated as:

$P(t)= V*I*cos(\phi)-V*I*cos(2 \omega t-\phi)$ (1)

Where:

$\phi=Phase\hspace{3}angle\\\omega= Angular\hspace{3}frequency$

Because of the problem doesn't give us additional information, let's assume:

$\phi=0\\\omega=2 \pi f=2*\pi *(60)=120\pi$

Evaluating the equation (1) in t=3600 (Because 1h equal to 3600s):

$P(3600)=160*8*cos(0)-160*8*cos(2*120\pi*3600-0)\\P(3600)=1280-1280*cos(2714336.053)\\P(3600)=1280-1280*0.5365255751\\P(3600)=1280-686.7527361=593.2472639\approx=593.247W$

5 0

4 years ago

Two of the types of infrared light, ir-c and ir-a, are both components of sunlight. their wavelengths range from 3000 to 1,000,0

NikAS [45]

The energy of a light wave is calculated using the formula
E = hc/λ
h is the Planck's constant
c is the speed of light
λ is the wavelength
For the ir-c, the range is
6.63 x 10^-34 (3x10^8) / 3000 = 6.63 x 10 ^-29 J
6.63 x 10^-34 (3x10^8) / 1000000 = 1.99 x 10^-31 J

For the ir-a, the range is
6.63 x 10^-34 (3x10^8) / 700 = 2.84 x 10^-28 J
6.63 x 10^-34 (3x10^8) / 1400 = 1.42 x 10^-28 J

6 0

3 years ago

Read 2 more answers