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3 years ago

A red pool ball is rolling directly east before it collides with the

Physics

1 answer:

ikadub [295]3 years ago

7 0

Answer: North East

Explanation: Trust me, I was just doing this on the Ck-12 and this the answer I choose and It said I'm correct.

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d) To calculate air pressure, the volume occupied by air is assumed constant. Why is this incorrect? Explain how the vapor press

Aleks [24]

Answer:

the volume occupied by air is not constant because as we add ethanol in it it will keep decreasing.

vapor pressure calculated and clausius-Claperon plot are affected because volume and vapor pressure are directly proportional.

Explanation:

by charle's law volume and temperature are directly proportional and vapor pressure is directly proportional to temperature thus volume and vapor pressure are also directly proportional by this relation

3 0

3 years ago

Imagine That Kevin can instantly transport himself between Planet X and planet Y. Which statement could be said about Kevin in t

Svetradugi [14.3K]

When Kevin pulls off this stunt, his average speed is (distance) / (time).

So, whatever the distance may be, his average speed for the trip is

(some distance)/0 = infinite speed.

Now, stay with me here:

His acceleration at the beginning of the trip is

(change in speed) / (time to change)

Whatever speed he started at, his acceleration had to be

(infinite change in speed)/(no time).

That's a big acceleration doncha know.

He needed an infinite force and an infinite amount of energy from somewhere to achieve that acceleration, and as soon as he started accelerating, his insides got totally shredded.

Whatever arrived on Planet-Y looked like a pile of overcooked pasta.

It wasn't worth the trip.

7 0

3 years ago

The density of gold is 19.3 g cm³. What is the mass of a bar of gold in Kg that measures 6 cm x 4 cmx to 2 cm ?

klemol [59]

Answer: 0.9264 kg

Explanation: [I'll use "cc" for cubic centimeter, instead of cm^3.

The volume is 6cm*4cm*2cm = 48 cm^3 (cc).

Density of Au is 19.3 g/cc

Mass of gold = (48 cc)*(9.3 g/cc) = 926.4 grams Au

1 kg = 1,000 g

(926.4 grams Au)*(1 kg/1,000 g) = 0.9264 kg, 0.93 kg to 2 sig figs

At gold's current price of $57,500/kg, this bar is worth $53,268. Keep it hidden from your lab partner (and instructor).

3 0

3 years ago

Operating speed of an automatic washing machine is 5.5 rad s-1 . After loading dirty clothes and pressing a start button, the tu

Solnce55 [7]

The rotational kinematics allows finding that the response for the time to reach the washing speed is

t = 4.26 s

Kinematics studies the motion of bodies, in the special case that the motion is circular is called rotational kinematics.

θ = w₀ t + ½ α t²

Where θ is the angle, w₀ are the initial angular velocity, α is the angular acceleration and t is the time

Rotational kinematics is written in units of radians, therefore all magnitudes must be reduced,

θ = 6 rev ( $\frac{2\pi }{1rev}$ ) = 12π rad

In this case the washing machine starts from rest, therefore the initial rotational velocity is zero

θ = ½ α t²

t = $\sqrt{\frac{2 \theta}{\alpha } }$

t = $\sqrt{\frac{2 \ 12\pi }{4.15} }$

t = 4.26 s

In conclusion using rotational kinematics we can find that the answer for the time to reach the washing speed is

t = 4.26 s

Learn more about rotational kinematics here:

brainly.com/question/20338754

4 0

3 years ago

a 40 kg-skier starts at the top of a 12-metter high slope. at the bottom she is travling 10 m/s. how much energy dose she lose t

jekas [21]

Potential energy at the top = (mass) x (gravity) x (height)

= (40 kg) x (9.8 m/s²) x (12 m)

= 4,704 Joules

Kinetic energy at the bottom = 1/2 (mass) x (speed)²

= 1/2 (40 kg) x (10 m/s)²

= 2,000 Joules .

Energy lost between the top and the bottom

(4,704 joules) - (2,000 joules)

= 2,704 Joules

3 0

4 years ago