All categories

1 year ago

PLEASE HELP

Physics

2 answers:

Semenov [28]1 year ago

3 0

Answer:

it take 687 days for Mars orbit around the sun

elena-s [515]1 year ago

3 0

Answer:

it takes mars 687 days to orbit around the sun so about 2 earth years

Explanation:

You might be interested in

You are on a sled at the top of a hemispherical, snowy hill of radius 13 m. You begin to slide down the hill. How fast are you m

8_murik_8 [283]

Answer:

Explanation:

There will be loss of potential energy due to loss of height and gain of kinetic energy .

loss of height = R - R cos 14 , R is radius of hemisphere .

R ( 1 - cos 12 )

= 13 ( 1 - .978 )

h = .286 m

loss of potential energy

= mgh

= m x 9.8 x .286

= 2.8 m

gain of kinetic energy

1/2 m v ² = mgh

v² = 2 g h

v² = 2 x 9.8 x 2.8

v = 7.40 m /s

4 0

2 years ago

Read 2 more answers

The average diameter of one tennis ball in a package of three is 6.8 cm. Which of the following is the combined volume of all th

Crank

We want to find the combined volume of 3 tennis balls. We will get that the combined volume is 493.7 cm^3

First, remember that for a sphere of diameter D, the volume is:

$V = \frac{4}{3}*3.14*(\frac{D}{2})^3$

Where 3.14 is pi.

Here we know that the average diameter of a tennis ball is 6.8cm, then we can replace that in the above equation to find the volume (in average) of a single tennis ball:

$V = \frac{4}{3}*3.14*(\frac{6.8cm}{2})^3 = 164.5 cm^3$

Now, in 3 balls of tennis, the combined volume will be 3 times the above one, this is:

$3*V = 3*164.5cm^3 = 493.7 cm^3$

If you want to learn more about volumes, you can read:

brainly.com/question/10171109

4 0

1 year ago

What is one way you could reduce the friction between two surfaces

Vlad [161]

You could put ice, put it on wheels!

6 0

3 years ago

A man pushes a box along a flat, frictionless surface using a force of 500 N. The box was moved a distance of 2.5 m. The actual

andrey2020 [161]

Answer:

Workdone = 1250Nm

Explanation:

<u>Given the following data;</u>

Force, F = 500N

Distance, d = 2.5m

Workdone is given by the formula;

$Workdone = force * distance$

Substituting into the equation, we have

$Workdone = 500 * 2.5$

Workdone = 1250Nm

Therefore, the actual work done by the worker is 1250 Newton-meter.

4 0

2 years ago

Calculate the speed of a proton after it accelerates from rest through a potential difference of 380 v .

nikitadnepr [17]

The magnitude of the change in potential energy is equal to the kinetic energy,

$\left | \Delta U \right |= K$

$qV=\frac{1}{2} mv^{2}$

Here, V is potential difference, q is charge, m is mass and v is velocity.

We can also write,

$v=\sqrt{\frac{2qV}{m} }$

Given $V=380 V$

Substituting this value with mass of proton, $m=1.672\times10^{-27} kg$ and charge of proton, $q= 1.6\times10^{-19} C$ we get

$v=\sqrt{\frac{2\times1.6\times10^{-19}C \times 380V}{1.672\times10^{-27} kg} }\\\\v= 727.27\times10^{8} m/s =7.27\times10^{6}m/s$

Therefore, the speed of proton is $7.27\times10^{6}m/s$ .

7 0

2 years ago

Read 2 more answers