Ask question

Ask question

All categories

katen-ka-za [31]

3 years ago

7

A substance has a boiling point of 220 degrees Celsius and a melting point of −120 degrees Celsius. What state will it be at roo

m temperature?

1 answer:

ozzi3 years ago

7 0

Room temperature is 36 degrees celsius

You might be interested in

Which fossil fuel is produced as a by-product that occurs when bacteria decompose organic material under anaerobic conditions?

Mumz [18]

Bio-gas is the naturally produced fossil fuel, a by-product when bacteria decompose organic material under anaerobic conditions.

<h3><u>Explanation:</u></h3>

Organic matter particularly waste material is broken down by bacteria through fermentation in an environmental condition without any presence of oxygen. This process of decomposition leads to formation of bio-gas with "carbon dioxide and methane" in a 2:3 ratio.

The above biological process is termed as bio-digestion or anaerobic digestion. Methane is flammable and thus bio-gas can be used as "energy source", a waste-to-energy transformation. The remaining decomposed matter is ideal as manure for plants due to its rich nutrient level.

5 0

3 years ago

If you increase the mass but keep force constant what will happen to the acceleration of the object

drek231 [11]

Answer:accelaration will decrease because forse is inversly proportional to mass.

Explanation:

3 0

4 years ago

At Magic Mountain there is a ride in which people stand up against the inside wall of a large cylinder of radius 3 m. The cylind

mafiozo [28]

Answer:

0.1308

Explanation:

To keep the rider from sliding down, then the friction force $F_f$ must at least be equal to gravity force $F_p$

$F_f = F_p$

$\mu N = mg$

where μ is the coefficient, N is the normal force acted by the rotating cylinder, m is the mass of a person and g = 9.81 m/s2 is the gravitational acceleration.

According to Newton's 3rd and 2nd laws, the normal force would be equal to the centripetal force $F_c$ , which is the product of centripetal acceleration $a_c$ and object mass m

$N = F_c = a_cm$

Therefore

$\mu a_cm = mg$

$\mu a_c = g$

The centripetal acceleration is the ratio of velocity squared and the radius of rotation

$a_c = v^2/r = 15^2 / 3 = 75 m/s^2$

Therefore

$\mu = g/a_c = 9.81 / 75 = 0.1308$

3 0

3 years ago

A wire of resistance R is cut into ten equal parts which are then connected in parallel. The equivalent resistance of the combin

Greeley [361]

Answer:

<em>The equivalent resistance of the combination is R/100</em>

Explanation:

<u>Electric Resistance</u>

The electric resistance of a wire is directly proportional to its length. If a wire of resistance R is cut into 10 equal parts, then each part has a resistance of R/10.

Parallel connection of resistances: If R1, R2, R3,...., Rn are connected in parallel, the equivalent resistance is calculated as follows:

$\displaystyle \frac{1}{R_e}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+...+\frac{1}{R_n}$

If we have 10 wires of resistance R/10 each and connect them in parallel, the equivalent resistance is:

$\displaystyle \frac{1}{R_e}=\frac{1}{R/10}+\frac{1}{R/10}+\frac{1}{R/10}...+\frac{1}{R/10}$

This sum is repeated 10 times. Operating each term:

$\displaystyle \frac{1}{R_e}=\frac{10}{R}+\frac{10}{R}+\frac{10}{R}+...+\frac{10}{R}$

All the terms have the same denominator, thus:

$\displaystyle \frac{1}{R_e}=10\frac{10}{R}=\frac{100}{R}$

Taking the reciprocals:

$R_e=R/100$

The equivalent resistance of the combination is R/100

6 0

3 years ago

If the net work done on an object is zero, what can you determine about the object's kinetic energy?(A) The object's kinetic ene

aev [14]

Answer:

(D) The object's kinetic energy is zero.

Explanation:

Work theory

Work (W) is defined as the product of force F) by the distance (d)the body travels due to this force:

W= F*d Formula ( 1)

The component of the force that performs work must be parallel to the displacement.

Kinetic Energy Theory

Kinetic energy is the energy associated with bodies that are in motion, depends on the mass and speed of the body.

Ek =(1/2)*m*v²

The kinetic energy, Ek, is measured in joules (J), the mass, m, is measured in kilograms (kg) and the velocity, v, in meters / second (m / s).

Relationship between work and kinetic energy

A body remains at rest if the force applied is zero or if it does not move. In both cases the work will be zero.

For work and kinetic energy to have a non-zero value, the body must be in motion.

In other words, the work is equal to zero if there is no displacement, so its speed will be zero, the same as its kinetic energy.

7 0

4 years ago