Answer:
Walking
1914000 J
Explanation:
P = Power
Time is given by
Energy is given by
Running
Walking
It can be seen that the energy walking requires more energy
Because the time taken cycling is less the energy is less.
Answer:
1.8 = relative density (there are no units for relative density)
Explanation:
It displaces water equal to it's volume and gets buoyancy equal to that amount of water
2.7 - 1.2 = 1.5 N of buoyancy
density of water = 1 gm /cc
1.5 N = m (9.81)
m of water displaced = .1529 kg
152.9 cc of water will produce this buoyancy....this is the volume of the object
find mass of object 2.7 = m (9.81) shows m = .2752 kg = 272.5 gm
density = mass/ volume = 272.5 / 152.9 = 1.8 gm / cc
Relative to water (which is 1 gm / cc) the relative density is 1.8
====> it is 1.8 times denser than water and will sink when in water....
The temperature of the copper sample increases by
Explanation:
When energy is supplied to a substance, the temperature of the substance increases according to the equation:
where
is the increase in temperature
Q is the amount of energy supplied
m is the mass of the substance
is the specific heat capacity of the substance
For the sample of copper in this problem,
m = 538.0 g
Q = 8373 cal
Therefore, substituting we have:
Learn more about specific heat here:
brainly.com/question/3032746
brainly.com/question/4759369
#LearnwithBrainly
Answer:
The answer is C
Explanation:
Scalar is a quantity that has magnitude but<u> </u><u>w</u><u>i</u><u>t</u><u>h</u><u>o</u><u>u</u><u>t</u><u> </u><u>d</u><u>i</u><u>r</u><u>e</u><u>c</u><u>t</u><u>i</u><u>o</u><u>n</u>.
So in this case, option A, B and D is a <u>vector</u>.
Answer:
Atomic number is the number of protons in the nucleus. The mass number of an atom tells you the total number of protons and neutrons in the nucleus.