All categories

3 years ago

Which of these physical quantities varies as an object changes its velocity? A. pressure B. mass C. weight D. momentum

Physics

2 answers:

kompoz [17]3 years ago

5 0

I believe the answer is B

Leokris [45]3 years ago

3 0

Answer: Option (D) is the correct answer.

Explanation:

Momentum means the ability of an substance or object to continue moving. In general, momentum is the product of mass and velocity. Momentum is a physical quantity.

Mathematically, p = m × v

where, p = momentum

m = mass

v = velocity

Momentum and velocity of an object can change whereas mass or weight is a fixed quantity, so mass will not change whether the object will move or not.

Therefore, when an object changes its velocity then there will also be change in its momentum.

You might be interested in

What is resistivity?

Rom4ik [11]

Answer:

Resistivity, electrical resistance of a conductor of unit cross-sectional area and unit length.

Explanation:

A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents. High resistivity designates poor conductors.

3 0

3 years ago

4. A vehicle

Gnom [1K]

Answer:

Average acceleration, $a=2.77\ m/s^2$

Explanation:

Given that,

Initial velocity, u = 0 km/h

Final velocity, v = 100 km/h = 27.77 m/s

Time, t = 10 s

We need to find the average acceleration of the vehicle. It is given by the change in velocity divided by time. Som,

$a=\dfrac{v-u}{t}\\\\a=\dfrac{27.77-0}{10}\\\\a=2.77\ m/s^2$

So, its average acceleration is $2.77\ m/s^2$ .

5 0

4 years ago

at what position an object be placed in front of a concave mirror of radius of curvature 40cm so that an erect image of magnific

Thepotemich [5.8K]

C=40cm
f=C/2=40/2=20

$\\ \sf\longmapsto m=\dfrac{f}{f-u}$

$\\ \sf\longmapsto 3=\dfrac{20}{20-u}$

$\\ \sf\longmapsto 3(20-u)=20$

$\\ \sf\longmapsto 60-3u=20$

$\\ \sf\longmapsto 3u=40$

$\\ \sf\longmapsto u=13.3cm$

m=magnification
f is focal length
C is radius of curvature
u is object distance

8 0

3 years ago

: Modeling Chemical Reactions

77julia77 [94]

Answer:

A Matter is not created or destroyed and the same amount of mass remains

Explanation:

In a chemical reaction, according to the law of conservation of matter, "matter is neither created nor destroyed and the same amount of mass remains in such a process".

New kinds of products are formed in a chemical reaction because they undergo chemical changes.
The chemical changes results in energy changes and formation of new kinds of substances.
Based on the law of conservation of matter, mass is constant.
Mass is not lost or gained.

8 0

3 years ago

Which statement is not true about plasm

Ivahew [28]

Where’s the statements?

6 0

3 years ago

Read 2 more answers