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2 years ago

Riddle of the day What is so fragile that saying its name breaks it?

Physics

2 answers:

lidiya [134]2 years ago

7 0

Silence i’m pretty sure^

anyanavicka [17]2 years ago

6 0

answer:

The answer to this specific riddle is silence.

<em>-- please mark the brainliest and click the thanks button if correct :)</em>

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Indicate whether a change in the value of each of the following determinants of demand leads to a movement along the demand curv

Inessa05 [86]

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
Change in market price is m<span>ovement along the demand curve. </span>

4 0

3 years ago

Photovoltaic cells: a) have become more economical to produce and use over the past 25 years. b) are the most efficient means of

Yanka [14]

Photovoltaic cells are the most efficient means of converting solar energy to electricity. Option b is correct.

A cell is a voltage and current-producing device that consists of a single anode and cathode separated by an electrolyte.

One or more cells can make up a battery. One cell, for example, is one AA battery.

Light intensity on a solar cell is often measured in "suns," with one sun roughly equivalent to 1 kW/m².

Concentrated sunlight improves the ratio of current generated while the device is lighted vs when it is dark, hence enhancing output voltage and efficiency.

Photovoltaic cells are the most efficient means of converting solar energy to electricity.

Hence, option b is correct.

To learn more about the cell refer to:

brainly.com/question/3142913

#SPJ1

8 0

1 year ago

Spaceship 1 and spaceship 2 have equal masses of 200 kg. Spaceship 1 has a speed of 0 m/s, and spaceship 2 has a speed of 10 m/s

m_a_m_a [10]

Answer:

2000 kg m/s

Explanation:

The momentum of an object is a vector quantity whose magnitude is given by

$p=mv$

where

m is the mass of the object

v is the velocity of the object

and its direction is the same as the velocity.

In this problem, we have:

- Spaceship 1 has

m = 200 kg (mass)

v = 0 m/s (zero velocity)

So its momentum is

$p_1 =(200)(0)=0$

- Spaceship 2 has

m = 200 kg (mass)

v = 10 m/s (velocity)

So its momentum is

$p_2=(200)(10)=2000 kg m/s$

Therefore, the combined momentum of the two spaceships is

$p=p_1+p_2=0+2000=2000 kg m/s$

3 0

3 years ago

Sally accelerates a 250 kg cart at 3 m/s/s. What must be the net force?

Vlad1618 [11]

750 N is what I got...

7 0

3 years ago

During soccer practice, Maya kicked a soccer ball 37° off the ground at 25 m/s. Max, the goalie, caught the ball 60 m away from

amid [387]

Answer:

3.0 seconds

Explanation:

We can solve the problem by considering the horizontal motion of the ball only. In fact, the ball moves by uniform motion (constant speed) along the horizontal direction, since there are no forces acting in this direction. The horizontal speed of the ball is given by:

$v_x = v_0 cos \theta = (25 m/s)(cos 37^{\circ})=19.97 m/s$

and it does not change during the motion.

We also know that the ball travels a horizontal distance of d = 60 m, so we can find the time it takes to cover the distance by using the equation:

$t=\frac{d}{v}=\frac{60 m}{19.97 s}=3.0 s$

8 0

3 years ago

Read 2 more answers