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3 years ago

A farmer places unhatched chicken eggs under a heat lamp. How does the radiation help the eggs?

Physics

2 answers:

guajiro [1.7K]3 years ago

5 0

It keeps the eggs warm until they hatch is your answer

LekaFEV [45]3 years ago

5 0

The correct answer is:

D. It keeps the eggs warm until they hatch.

A farmer places unhatched chicken eggs under a heat lamp. The radiation help the eggs by keeping them warm until they hatch.

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A box is 4 m in the air and has 120 J of potential energy. What is the box's mass

hodyreva [135]

Answer:

Mass of the box is 3.06 kg

Explanation:

Potential energy (that depends on gravity) is the type of energy which is stored that relies on the general position of different parts of a body. It is a property of a framework and not of an individual body or molecule; the framework made out of the Earth and the raised ball.

P.E = m.g.h Equation(1)

as we have to find the mass of the box then the formula for the mass will become

m=P.E/g(h) Equation(2)

as we know

P.E= 120J

h=4m

g=9.8m/s

g is the gravitational acceleration

putting values in the equation(2)

m = 120/9.8(4)

= 120/39.2

= 3.06 kg

mass of the box is 3.06 kg

5 0

4 years ago

A firecracker is thrown downward from a height of 2.75m above the ground, with a speed of 3.15m/s. Ignore air resistance, determ

3241004551 [841]

Here in this question as we can see there is no air friction so we can use the principle of energy conservation

$PE_i + KE_i = PE_f + KE_f$

$mgh_1 + \frac{1}{2}mv_i^2 = mgh_2 + \frac{1}{2}mv_f^2$

now here we know that

$h_1 = 2.75 m$

$v_i = 0$

$v_f = 5.23 m/s$

now plug in all values in above equation

$mg*2.75 + 0 = mgh + \frac{1}{2}m(5.23)^2$

divide whole equation by mass "m"

$9.8*2.75 = 9.8*h + \frac{1}{2}*27.35$

$9.8*h = 13.27$

$h = 1.35 m$

so height of the ball from ground will be 1.35 m

4 0

3 years ago

Pani-rosa [81]

The total displacement is 4.0 m east.

4 0

3 years ago

You have a 1.8m long copper wire. You want to make an N-turn current loop that generates a 2.0mT magnetic field at the center wh

NikAS [45]

Answer:

The diameter is 0.022m.

Explanation:

The magnetic field $B$ at the center of the coil is given by

(1). $B = \dfrac{\mu_0 NI}{d}$

where $\mu_0 = 1.26*10^{-6} m\:kg\:s^{-2} A^{-2}$ is the magnetic constant, $I$ is the current, $N$ number of coils, and $d$ is the diameter of the coil.

Now, if we call $L$ the length of the wire, then it must be true that

$\pi dN = L$ <em>(this says </em> $N$ <em> coil circumferences (</em> $c=\pi d$ <em>) fit into </em> $L$ <em> )</em>

$\therefore N = \dfrac{L}{\pi d }$

putting this into equation (1) we get:

$B = \dfrac{\mu_0 IL }{\pi d^2}$

solve for $d:$

$\boxed{d = \sqrt{\dfrac{\mu_0I L }{\pi B} }}$

putting in the numerical values

$\mu_0 = 1.26*10^{-6} m\:kg\:s^{-2} A^{-2}$

$I =1.3A$

$L= 1.8m$

$B =2.0*10^{-3}T$

we get:

$d = \sqrt{\dfrac{(1.26*10^{-6})(1.3) *1.8 }{\pi (2.0*10^{-3})} }$

$\boxed{d = 0.022m}$

4 0

4 years ago

If a giant molecular cloud is 59 pc in diameter and a shock wave sweeps through at 18 km/s, how long will it take the shock wave

11Alexandr11 [23.1K]

The time it will take for the shock wave in years to sweep through the cloud is 3.2075 x 10⁷ years.

<h3>What is Velocity?</h3>

Velocity is the directional speed of a moving object as an indicator of its rate of change in location as perceived from a certain frame of reference and measured by a specific time standard.

As it is known that one parsec is equal to 3.086×10¹⁶ meters. Therefore, the diameter of the molecular cloud is,

Diameter of the molecule = 59 pc

= 59 × 3.086×10¹⁶ meters

= 1.82074 × 10¹⁸ meters

= 1.82074 × 10¹⁵ kilometres

Given that the shock wave sweeps through at 18 km/s. And as it is known that velocity is the ratio of distance and time. Therefore, the time it will take for the shock wave to sweep through the molecule cloud is,

Velocity = Distance / Time

18 km/s = 1.82074 × 10¹⁵ km / Time

Time = 1.82074 × 10¹⁵ km / 18 km/s

t = 1.01152x10¹⁴ seconds

Since one year is equal to 31,536,000 seconds, therefore, the time in years is equal to,

t = 1.01152x10¹⁵ seconds / 31,536,000 seconds per year

t = 32,075,088.79 years

t = 3.2075 x 10⁷ years

Hence, the time it will take for the shock wave in years to sweep through the cloud is 3.2075 x 10⁷ years.

Learn more about Velocity here:

brainly.com/question/18084516

#SPJ4

7 0

2 years ago