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Paladinen [302]

2 years ago

6

Which term below describes a measurement of how hard an object pushes against a surface?

2 answers:

Scilla [17]2 years ago

8 0

I hope the answer is D. Pressure

expeople1 [14]2 years ago

3 0

Answer:

like the other guy, the answer is pressure

Explanation:

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Calculate the power required of a 60-kg person who climbs a tree 5 meters high in 10 seconds.

Alina [70]

Answer:

Explanation:

Power = Energy/time

-Don't have energy so I'm gonna solve for it

Gravitational Potential Energy = mass x gravity x height

= 60 kg x 9.8 m/s2 x 5m

= 2940 J

Power = Energy/time

=2940 J/10 s

= 294 W

3 0

1 year ago

Pure sodium metal placed in water will spark and ignite, as well as form bubbles and gas. What are the signs that this is a chem

ad-work [718]

<h3><u>Answer;</u></h3>

Heat is produced
Light is produced
Bubbles appear

<h3><u>Explanation;</u></h3>

Chemical reactions involve the chemical interaction of two or more chemical substances, result in a new substance being formed, and are usually irreversible.
The signs of chemical reactions include gas formation, energy release in the form of light or flame, heat absorption, precipitate formation, and color change.

7 0

2 years ago

Read 2 more answers

You are exploring a distant planet. When your spaceship is in a circular orbit at a distance of 630 km above the planet's surfac

Anarel [89]

Answer:

$R = 24.3 m$

Explanation:

As we know that the orbital speed is given as

$v = \sqrt{\frac{GM}{R + h}}$

here we know that

v = 5500 m/s

$R = 4.48 \times 10^6 m$

$h = 630 km$

now we have

$5500 = \sqrt{\frac{(6.6 \times 10^{-11})M}{4.48 \times 10^6 + 6.30\times 10^5}}$

$M = 2.34 \times 10^24 kg$

now acceleration due to gravity of planet is given as

$a = \frac{GM}{R^2}$

$a = \frac{(6.6 \times 10^{-11})(2.34 \times 10^{24})}{(4.48\times 10^6)^2}$

$a = 7.7 m/s^2$

now range of the projectile on the surface of planet is given as

$R = \frac{v^2 sin2\theta}{g}$

$R = \frac{14.6^2 sin(2\times 30.8)}{7.7}$

$R = 24.3 m$

3 0

3 years ago

Which of the examples below is an example of convection?

nasty-shy [4]

Basking in the sun :)

3 0

2 years ago

You want to estimate the diameter of a very small circular pinhole that you've made in a piece of aluminum foil. to do so, you s

Leya [2.2K]

Central maximum = d* wavelength/ D
thus
12*10-^3 = 3.4*6.32*10-^7/D
D = 3.4*6.32*10-^7/12*10-^3
D = 1.79*10-^4 m

3 0

2 years ago