All categories

3 years ago

5. A little boy tries to push a heavy cupboard. He uses a force of 400 N, but he is unable to move

Physics

1 answer:

ad-work [718]3 years ago

8 0

Answer:

NO HAY TRABAJO REALIZADO YA QUE EL NIÑO NO PUDO MOVER

EL ARMARIO, PARA QUE HAYA TRABAJO DEBE HABER DESPLAZAMIENTO.

Explanation:

You might be interested in

PLEASE HELP ME I REALLY NEED HELP

allochka39001 [22]

Answer:

The answer is A.

Explanation:

The graph would show the unit rate otherwise known as a ratio

3 0

3 years ago

What are the two most common ways to produce hydrogen gas used in fuel cells?

Natali5045456 [20]

Answer:

Steam-methane reforming

Electrolysis of water

Explanation:

Steam methane reforming involves reaction of methane with water in the presence of a catalyst such as nickel to form Carbon oxides and Hydrogen.

CH4 + H2O ⇌ CO + 3 H

Electrolysis of water involves splitting of water through application of electric current to give Hydrogen and Oxygen gas.

2 H2O(l) → 2 H2(g) + O2(g)

8 0

3 years ago

A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.7 1010 m (inside the orbit

Lubov Fominskaja [6]

Answer:

58515.9 m/s

Explanation:

We are given that

$d_1=4.7\times 10^{10} m$

$v_i=9.5\times 10^4 m/s$

$d_2=6\times 10^{12} m$

We have to find the speed (vf).

Work done by surrounding particles=W=0 Therefore, initial energy is equal to final energy.

$K_i+U_i=K_f+U_f$

$\frac{1}{2}mv^2_i-\frac{GmM}{d_1}=\frac{1}{2}mv^2_f-\frac{GmM}{d_2}$

$\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2}=\frac{1}{2}v^2_f$

$v^2_f=2(\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2})$

$v_f=\sqrt{2(\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2})}$

Using the formula

$v_f=\sqrt{v^2_i+2GM(\frac{1}{d_2}-\frac{1}{d_1})}$

$v_f=\sqrt{(9.5\times 10^4)^2+2\times 6.7\times 10^{-11}\times 1.98\times 10^{30}(\frac{1}{6\times 10^{12}}-\frac{1}{4.7\times 10^{10})}$

Where mass of sun= $M=1.98\times 10^{30} kg$

$G=6.7\times 10^{-11}$

$v_f=58515.9 m/s$

4 0

3 years ago

Can somebody answer these I'm suspended and I have to catch up on my work and I dont have any notes.

ANTONII [103]

I can barley see turn it so I can see

8 0

3 years ago

Read 2 more answers

Nitrogen fixation is the conversion of

Varvara68 [4.7K]

Answer:

D IS MY ANSWER N2 TO UREA HOPE ITS HELFUL

6 0

3 years ago