4 years ago

Do you wont to be friends

Physics

1 answer:

Angelina_Jolie [31]4 years ago

8 0

Answer:

shore

Explanation:

You might be interested in

What are the strengths and limitations of the doppler and transit methods? What kind of planets are easiest to detect with each

Arturiano [62]

$\huge\mathfrak\red{✔Answer:-}$

Strength: able to detect planets in a wide range of orbits, as long as orbits aren't face on

Limitations: yield only planet's mass and orbital properties

3 0

4 years ago

A sprinter has a mass of 80 kg and a kinetic energy of 2500 J. What is the sprinter's speed?

nata0808 [166]

Using KE = 1/2mv^2
m = mass (80kg)
v = velocity (?)
KE = kinetic energy (2500J)
2500/((1/2) x (80)) = v^2
Square root the answer to get: 7.91 m/s

3 0

2 years ago

A simple pendulum is used to determine the acceleration due to gravity at the surface of a planet. The pendulum has a length of

SVEN [57.7K]

Answer:

Acceleration due to gravity is 20 $m/sec^2$

So option (E) will be correct answer

Explanation:

We have given length of the pendulum l = 2 m

Time period of the pendulum T = 2 sec

We have to find acceleration due to gravity g

We know that time period of pendulum is given by

$T=2\pi \sqrt{\frac{l}{g}}$

$2=2\times 3.14 \sqrt{\frac{2}{g}}$

$0.3184= \sqrt{\frac{2}{g}}$

Squaring both side

$0.1014= {\frac{2}{g}}$

$g=19.71=20m/sec^2$

So acceleration due to gravity is 20 $m/sec^2$

So option (E) will be correct answer.

8 0

3 years ago

Describe the energy of a playground swing at its highest point

Korvikt [17]

At the hightest point it would be potential energy, because the energy is stored and then when it is rocking back and forth it has kinetic energy

8 0

4 years ago

Due to design changes, the efficiency of an engine increases from 0.28 to 0.51. For the same input heat |QH|, these changes incr

Volgvan

Answer:

the ratio of the heat rejected to the cold reservoir for the improved engine to that for the original engine is 0.68

Explanation:

Given information

initial efficiency, η $_{1}$ = 0.28

final efficiency, η $_{2}$ = 0.51

ratio of the heat rejected = (1 - η $_{2}$ )/(1 - η $_{1}$ )

= (1 - 0.51)/(1 - 0.28)

= 0.68

4 0

3 years ago