Answer:
student 2 is correct.
Explanation:
isotopes of the same element have the same number of protons in the nucleus but a different number of neutrons.
Answer:
14.44 revolutions
Explanation:
unit conversion:
85mile/hour = 85mile/hour * 5280ft/mile * 1/3600hours/second = 448800ft/hour = 124.67 ft/s
1800rev/min = 1800rev/min * 1/60min/seconds = 30 rev/s
The time it takes for the 85mph base ball to travel 60 ft is
t = s/v = 60 / 124.67 = 0.4813 seconds
By that time, the number of revolution it would make is:
r = 30 * 0.4813 = 14.44 revolutions
The correct option is B.
There are four basic factors which affect the properties of stringed instruments, these are frequency, diameter [thickness], tension and density.
Diameter refers to the thickness of the string. Thick strings with large diameter vibrate slower and thus they have lower frequency and lower pitch compared with thin strings.<span />
Answer:
The elastic potential energy of the spring is 0.28 J
Explanation:
Given;
mass of the block, m = 0.05 kg
spring constant, k = 350 N/m
extension of the spring, x = 4 cm = 0.04 m
The elastic potential energy of the spring is calculated as;
Therefore, the elastic potential energy of the spring is 0.28 J
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: