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larisa86 [58]
3 years ago
8

Describe a device that transforms thermal energy into another useful form. tes that

Physics
1 answer:
spin [16.1K]3 years ago
4 0

Answer: heat engine

Explanation:

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an object weighting 100g is thrown upwards from the ground at a speed of 100 m/s.where will the potential energy of the object b
Kay [80]

Answer:

333.3 m

Explanation:

Given

m =100g\ =\  0.1kg\\v = 100 m/s\\g = 10 m/s ^2

Potential energy =\frac{2}{3}\  of\  Kinetic\  energy......Equation(1)

We know that

Potential energy=mgh

Kinetic energy =\frac{1}{2} mv^{2}

Now From the Equation(1)

mgh=\frac{2}{3}*\frac{1}{2} mv^{2}\\  gh=\frac{v^{2} }{3} \\10 * h=\ \frac{10000}{3}\\ h=\ \frac{1000}{3} \\h=333.3\  m

3 0
3 years ago
While standing atop a building 49.6 m tall, you spot a friend standing on a street corner. Using a protractor and a dangling plu
olga nikolaevna [1]

Answer:

75degree don't forget wind and gravity force pulling down

6 0
3 years ago
Which statement is not a good practice when working inside a computer case?
lozanna [386]

Answer:

a. be sure to hold expansion cards by the edge connectors

Explanation:

Removal of loose jewelry is a good safety practice. Also not touching a microchip with a magnetized screwdriver is also a good practice.

But holding expansion cards by the edge connectors is not a good practice, so it is the odd one in the question. Therefore answer option a provides the correct and best answer to the question

3 0
3 years ago
a car traveling north at 17.7 m/s. after 12 seconds its velocity is 14.1 m/s in the same direction. find the magnitude and direc
elixir [45]
Acceleration is equal to the change in velocity per unit time. In this case, velocity has changed from 17.7 m/s to 14.1 m/s, which is a decrease of 3.6 m/s. This takes place in 12 seconds, so the average acceleration is 3.6 m/s / 12s = 0.3 m/s^2. The direction of this acceleration is south, since the car's northbound speed is decreasing.
7 0
3 years ago
S To minimize neutron leakage from a reactor, the ratio of the surface area to the volume should be a minimum. For a given volum
goblinko [34]

To minimize neutron leakage from a reactor, the ratio of the surface area to the volume should be a minimum. For a given volume V ,  ratio for (c) a parallelepiped of dimensions × 2 a will be \frac{6.29961}{c^\frac{1}{3} }

What will be the ratio of surface area and the volume of the parallelepiped

We will proceed by stating the equations of the surface area and the volume of each shape, and then identifying each of the surface area and the volume, we will take their ratios, and as it is asking for the shape which has the minimum surface area to volume ratio, therefore at some given volume, V=const.

The parallelepiped whose dimension is given as

2a,a,a

the surface area and the volume is given respectively by:

A=2(2a \times a)+2(a \times 2a)+2(a \times a)=10a^{2}

V=2a^{3}

Let the volume be equal to the constant c, we get:

V=c=2a^{3}\\a=(\frac{c}{2} )^\frac{1}{3}

Hence the ratio is given by:

\frac{A}{V} =\frac{10a^{2}}{2a^{3}}=\frac{5}{a}

Calculating the constants, by substituting the value of a in (3), we get:

\frac{A}{V}=\frac{6.29961}{c^\frac{1}{3} }

To learn more about parallelepiped, refer to:

brainly.com/question/27975136

#SPJ4

5 0
1 year ago
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