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3 years ago

5kg of copper ball and I kg of water are at the same temperature of 31 C. Which

Physics

1 answer:

blagie [28]3 years ago

8 0

Answer:

Explanation:

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What description uses the senses to describe an observation

Elan Coil [88]

I would say all of them, because when making an observation you use, sight,sound,taste,touch, and smell

6 0

4 years ago

A 495-kg dragster accelerates from rest to a final speed of 105 m/s in 395 m, during which it encounters an average frictional f

drek231 [11]

Answer:

Explanation:

According to energy conservation which states that the workdone is equal to change in the system

Workdone = change in kinetic energy + (frictional force * distance)

Workdone = ΔK + fd

Workdone = kf-Ki + fd

Workdone = = 1/2(m(v-u)^2) + fd

Given

Mass m = 495kg

final velocity v = 105m/s

initial velocity = 0m/s

Force f= 1400N

distance d = 395m

Substitute

Workdone = 1/2(495(105-0)^2) + 1400(395)

Workdone = 2,728,687.5+553000

Workdone = 3,281,687.5 Joules

Time = 8.2secs

Power output = Workdone/Time

Power output = 3,281,687.5/8.2

Power output = 885,766.768

Power output = 8.858 * 10^5 watts

3 0

4 years ago

What is pmolecule and hmolecules

Sedbober [7]

Answer:

Compound Basics

Explanation:

Molecule is the general term used to describe any atoms that are connected by chemical bonds. ... Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.

3 0

3 years ago

What is the mechanical energy of a 500kg rollercoaster car moving with a speed of 3m/s at the top hill that is 30m high

koban [17]

K.E = 1/2*m*v^2 = 1/2(500)(3)^2 = 2250 J

m*g*h = 500(9.8)(30) = 147000 J

2250 + 147000 = 149250

4 0

3 years ago

A 1250kg car driving 1200km to Florida in 19.5 hours gets a speeding ticket for traveling 120km/h in Turbeville South Carolina.

IRINA_888 [86]

Answer:

v = 61.54 km/h

Explanation:

The average speed of the car can be found by using the total distance covered by the car and the total time taken for that distance to be traveled. Therefore, the average speed of the car can be found by the following formula:

$v = \frac{d}{t}\\$

where,

v = average speed during the trip = ?

d = total distance driven by the car = 1200 km

t = time taken for the traveling = 19.5 hr

Therefore,

$v = \frac{1200\ km}{19.5\ hr}\\\\$

3 0

3 years ago