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3 years ago

I need help I'm stuck on a question it's a cross word "the measure of energy of motion of particles of matter

2 answers:

7 0

Temperaturea measure of the average energy of random motion of particles of matterThermal Energythe total energy of all the particles of matterExothermic changea change in which energy is given offKinetic energythe energy of matter in motion

natima [27]3 years ago

3 0

When you ask for help with a crossword clue, don't forget to tell us how many letters it has. For this one, see if "temperature" fits the space.

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Explain in detail why insulating you’re house will reduce your energy bills.

Anni [7]

Answer:

By insulating our homes, we reduce the demand for energy and burn less fuel, which helps combat climate change and protects the planet. Insulating the loft, walls and floor of your home is a great way to reduce energy bills every year from a one-off activity!

Explanation:

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3 years ago

Which of these best describes how an appropriate star chart is selected to locate objects in the sky

Umnica [9.8K]

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3 years ago

A proton and an electron are moving in the +x direction in a magnetic field in the +z

Aleksandr [31]

Answer:

Explanation:

Force on a moving charge is given by the following relation

F = q ( v x B )

for proton

q = e , v = vi , B = Bk

F = e ( vi x Bk )

= Bev - j

= - Bevj

The direction of force is along negative of y axis or -y - axis.

for electron

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F = - e ( vi x Bk )

= - Bev - j

= Bevj

The direction of force is along positive of y axis or + y - axis.

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3 years ago

12. Unmanned Space Probe A 2500 kg unmanned space probe is moving in a straight line at a constant speed of 300 m/s. Control roc

Lena [83]

answer of both parts are attached below

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4 years ago

Read 2 more answers

The 1000-lb elevator is hoisted by the pulley system and motor M. If the motor exerts a constant force of 500 lb on the cable, d

Nezavi [6.7K]

Answer:

the power that must be supplied to the motor is 101.45 hp

Explanation:

Given that,

The weight of elevator = 1000lb

The motor exerts a constant force of 500 lb on the cable

The load has been hoisted s = 15 ft starting from rest

The motor has an efficiency of e = 0.65

According to the equation of motion:

F = ma

$3(500) - 1000 = \frac{1000}{32.2} * aa = 16.1 ft/s^2$

$v^2 - u^2 = 2a (S - So)\\\\v^2 - (0)^2 = 2 * 16.1 (15-0)\\\\v = 21.98m/s$

To calculate the output power:

P(out) = F. v

P(out) = 3 (500) * 21.98

P(out) = 32970 lb.ft/s

As efficiency is given and output power is known, we can calculate the input power.

ε = P(out) / P(in)

0.65 = 32970 / P(in )

P(in) = 50,723 lb.ft/s

P(in) = 50,723 / 500 hp

= 101.45 hp

the power that must be supplied to the motor is 101.45 hp

5 0

4 years ago