Please help. Having a hard time figuring out

Solar panels allow us to harness ___________ energy and convert it to __________ energy to heat water.

vichka [17]

Solar energy
thernal energy

3 0

4 years ago

9) What would be the weight of a 59.1-kg astronaut on a planet with the same density as Earth and having twice Earth's radius?

Hunter-Best [27]

The weight of the astronaut is given by
$W=mg$
where m=59.1 kg is his mass and $g=9.81~m/s^2$ is the gravitational acceleration on Earth.

To solve the problem, we must find the value of g on the new planet. g is given by
$g= \frac{GM}{r^2}$
where G is the gravitational constant, M the mass of the planet and r its radius.
The mass of the planet can be written as
$M=dV$
where d is the density and V the volume.
We can assume that the planet is a sphere, therefore the volume is proportional to $r^3$ :
$V= \frac{4}{3}\pi r^3$
and we can write the mass as
$M= \frac{4}{3} \pi d r^3$
and then, g becomes
$g= \frac{GM}{r^2}= \frac{4}{3} \frac{G \pi d r^3}{r^2}= \frac{4}{3} G \pi d r$
So, in the end g is proportional to the radius of the planet, r (because the density of the new planet d is the same as the Earth's one. If the radius of the new planet is twice the Earth's radius, g will be twice the value of g on Earth:
$g_{new}=2g=2\cdot9.81~m/s^2=19.62~m/s^2$
And since the mass of the astronaut is always the same, the weight on the new planet will be twice the weight on Earth:
$W_{new}=mg_{new}=2mg=1159~N$

5 0

4 years ago

When a tiger drinks water, it makes portion of water oscillating up and down two complete cycles per second. As the water wave s

Stolb23 [73]

The wave's speed is 1.25 m/s.

<h3>What is Wavelength?</h3>

The distance over which a periodic wave's form repeats is known as the wavelength in physics. It is a property of both travelling waves and standing waves as well as other spatial wave patterns. It is the distance between two successive corresponding locations of the same phase on the wave, such as two nearby crests, troughs, or zero crossings.

The spatial frequency is the reciprocal of wavelength. The Greek letter lambda (λ) is frequently used to represent wavelength.

The term wavelength is also occasionally used to refer to modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids.

to learn more about Wavelength go to - brainly.com/question/10750459

#SPJ4

7 0

2 years ago

This version of Einstein’s equation is often used directly to find what value?

Setler [38]

This version of Einstein’s equation is often used directly to find what value? E = ∆mc2

Answer: This version of Einstein’s equation is often used directly to find the mass that is lost in a fusion reaction. Therefore the correct answer to this question is answer choice C).

I hope it helps, Regards.

8 0

3 years ago

Read 2 more answers

The drag on a pitched baseball can be surprisingly large. Suppose a 145 g baseball with a diameter of 7.4 cm has an initial spee

kupik [55]

Answer:

<h2>Part A)</h2><h2>Acceleration of the ball is 10.1 m/s/s</h2><h2>Part B)</h2><h2>the final speed of the ball is given as</h2><h2> $v_f = 35.3 m/s$ </h2>

Explanation:

Part a)

As we know that drag force is given as

$F = \frac{C_d \rho A v^2}{2}$