Answer:
d) The molecules in A have more average kinetic energy per molecule than those in B
e) The molecules in A are moving faster than those in B
Explanation:
Given that
Size of boxes are equal
So volume of boxes = V
Temperature in box A =50°C = 323 k
Temperature in box B = 10°C = 283 K
We know that for ideal gas
P V = m R T
The mass of gases is not given so we can not say that which have high temperature.Also be can not say that which box have more molecule.
We know that average kinetic energy is directly proportional to the absolute temperature of gas that is why we can say that box A will have more kinetic energy because it have high temperature.We know that is gas have high kinetic energy then we can say that it have high moving velocity.
So the option d and e is correct.
d) The molecules in A have more average kinetic energy per molecule than those in B
e) The molecules in A are moving faster than those in B
Answer:
B. The maximum angle decreases
Explanation:
If θ be the maximum angle of a slope that allows a crate placed on it to remain at rest , following condition exists .
tanθ = μ , θ is called angle of repose . μ is coefficient of static friction .
So the tan of angle of repose θ is proportional to coefficient of static friction.
If coefficient of static friction is less than .7 , naturally angle of repose will also become less ,ie, it at lower angle of inclination , the object will start slipping .
Answer:
NO decimals after the decimal place.
Explanation:
Recall that the rule for addition of values for measured quantities specifies that the total should be rounded to the number of decimal of the quantity with the less resolution (number of decimals). Then, the given addition should carry NO decimals after the decimal point, limited by the second value added (15) which carries no decimals.
Answer:
a. 2500 cm³.
b. 2.5 litres.
Explanation:
Given the following data:
Density = 0.8g/cm³
Mass = 2000g
To find the volume of the petrol;
Density can be defined as mass all over the volume of an object.
Simply stated, density is mass per unit volume of an object.
Mathematically, density is given by the equation;
Making volume the subject of formula, we have;
Substituting into the equation, we have:
Volume = 2500 cm³
a. The volume of the petrol in the can in cubic centimeters (cm³) is 2000.
b. The volume of the petrol in the can in litres;
1000 cm³ = 1 litre
2500 cm³ = x litres
Cross-multiplying, we have;
1000x = 2500
x = 2500/1000
x = 2.5 litres.
Therefore, the volume of the petrol in the can in litres is 2.5.
Answer:
Answer:
energy
Explanation:
The capacity to do work is called energy.
There are several types of energy. Some of the types of energy are given below:
1. Kinetic energy
2. Potential energy
3. Solar energy
4. thermal energy
5. Sound energy
6. Nuclear energy, etc.
The SI unit of energy is Joule.
Some other units of energy are
erg, eV, etc.
1 J = 10^7 erg
1 eV = 1.6 x 10^-19 J
The commercial unit of energy is kilowatt hour.
1 Kilo watt hour = 3.6 x 10^6 J
Explanation:
