Answer:300 joules
Explanation:The formula for specific heat is:
E
=
m
c
θ
, where:
E
is the energy needed in joules,
m
is the mass in kilograms,
c
is the specific heat,
θ
is the change in temperature, Celsius of Kelvin doesn't matter.
Here,
m
=
0.125
kg
c
=
480
J/kg
∘
C
θ
=
5
∘
C
, and inputting:
E
=
0.125
⋅
480
⋅
5
E
=
300
J
of energy is needed.
Each of the choices may be considered right depending on the use
of context or on how terms are defined, but the one that is most correct is:
"Controlled experiments
produce valid data"
Controlled experiments are experiments in which factors which are
not the interest of the study or which are not being studied are controlled or
accounted for in the design, so that resulting data are less likely to be
caused by some anomaly or by some variable other
than those being
studied. In usual research scenarios it is not the data itself that
is acted upon in the <span>experiment - it is the experiment itself, the
factors and the physical processes that will eventually yield data.</span>
Answer:
The order of steps for writing a chemical formula is 3, 2, 1, 5, 4
Explanation:
Balance the charges. Identify the negative ion and charge. Identify the positive ion and charge. Use the information in the ratio to write the chemical formula. Write the ratio of ions that balances the charges.
The order of steps for writing a chemical formula from the options above is:
3.) Identify the positive in and charge.
2.) Identify the negative ion and charge.
1.) Balance the charges.
5.)Write the ratio of ions that balances the charges.
4.) Use the information in the ratio to write the chemical formula.
F = applied force on the wheelbarrow in forward direction = 600 N
f = frictional force pushing in backward direction of wheelbarrow = ?
m = mass of the wheelbarrow = 28 kg
Since wheelbarrow moves forward at a constant velocity
a = acceleration of the wheelbarrow in forward direction = 0 m/s²
force equation for the motion of wheelbarrow in forward direction is given as
F - f = ma
inserting the above values in the formula
600 - f = (28) (0)
600 - f = 0
f = 600 N
hence the frictional force comes out to be 600 N
