Answer:
Acceleration a =-1.75 m/s²
Explanation:
Given:
Initial speed u = 24 m/s
Final speed v = 10 m/s
Time taken t = 8 sec
Find:
Acceleration a
Computation:
a = (v-u)/t
a = (10-24)/8
a = -14 / 8
Acceleration a =-1.75 m/s²
Answer: c. The Gravitational Force forms an action-reaction pair
Explanation:
Newton's third law of motion talks about how for every amount of force exerted, there is an equal yet opposite reaction force exerted. This gives rise to Action-Reaction pairs.
Gravitational force forms an action-reaction pair when it is exerted for instance, the Gravitational force exerted on a person by the Earth is a person's weight. At the same time however, the person is exerting a gravitational force on the earth in the form of their weight.
Answer:
A balance and a graduated cylinder.
Explanation:
<u><em>Density</em></u> is the relationship between mass and volume of a substance, the formula is:
ρ
Where m is the substance mass, and v is the volume.
If a student wants to measure the density of seawater, he or she should use a Balance, to measure the mass of the sample. And then use a Graduated cylinder, is a volumetric instrument that allows to contain liquids and then measures the exact volume of the sample.
Once the student obtains the mass and the volume, he/she has to replace the data in the density formula and so obtain the density of seawater.
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