Answer:
Explanation:
Chemical properties only manifest when a chemical reaction occurs. Being reactive, flammable and explosive are chemical properties, because they involve chemical reactions: the substances are changed; the chemical bonds of some substances, called reactants, are broken, and the chemical bonds are created, forming other substances, called products.
Solubility is a<em> physical property</em> because during dissolution no new substances are formed. You can prove it when the solvent evaporates leaving behind the same original substance.
The the observation that the substance is <em>soluble</em> is describing a <em>physical property.</em>
Answer : The mass of the tennis ball is, 58.8 g
Solution : Given,
Momentum of tennis ball =
Velocity of tennis ball =
Momentum : It is equal to the product of the mass of object and the velocity of the object.
Formula used :
where,
p = momentum of an object
m = mass of an object
v = velocity of an object
Now put all the given values in the formula, we get the mass of an object.
(1 Kg = 1000 g)
Therefore, the mass of the tennis ball is, 58.8 g
Answer:
Regular reflection occurs when a beam of light falls on a smooth and polished surface and irregular reflection occurs when a beam of light falls on a rough surface. Since the surface is uneven, from different points light rays get reflected in different directions and give rise to irregular reflection.
Answer:
tensile stress = 55 x 10⁷ Pa
Explanation:
given,
radius of the copper wire = 4.1 mm = 0.0041 m
the wire stretches = 5.0×10⁻³ l
l = original length
young's modulus of copper = 11 x 10¹⁰ Pa
strain =
tensile stress = young's modulus x strain
tensile stress = 11 x 10¹⁰ x 5.0×10⁻³
tensile stress = 55 x 10⁷ Pa
The tensile stress on the wire is equal to 55 x 10⁷ Pa
Answer:
a. 0.00266v
b. -0.0016625
the area should be shrunk
Explanation:
the magnitude of the EMF induced in the loop
= area * rate
= 0.014 * 0.19
= 0.00266 V
B we are to solve for the rate at which the are has to be change with B = 1.6
δA/δt = -A/B * dB/dt
= (-0.014 * 0.19) /1.6
= -0.0016625
the sign is negative so the EMT is negative and so the area has to be shrunk.