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2 years ago

2. Keith took a cube and measured the mass and volume of a

Physics

1 answer:

galben [10]2 years ago

7 0

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 36 g

volume = 6 cm³

We have

$density = \frac{36}{6} = 6 \\$

We have the final answer as

Hope this helps you

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Which quantities below of a solid object on this planet are NOT the same as on Earth?

AysviL [449]

Answer:

Weight, acceleration when it falls vertically, are not same as that of earth.

Explanation:

Weight of the object is given by the product of mass of the object and the acceleration due to gravity of the planet.

So, the weight of object is not same as that on earth.

The mass is defined as the amount of matter contained in the object.

So, the mass of the object is same as that of earth.

The volume of the object is defined as the space occupied by the object.

So, the volume of the object is same as that of earth.

The density is defined as the ratio of mass of the object to its volume.

So, the density of the object is same as that of earth.

The acceleration due to gravity on a planet depends on the mass of planet and radius of planet.

So, the acceleration is not same as that of earth.

The color of the object is its characteristic.

It is same as that of earth.

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2 years ago

.a car increases its speed from 10 m/s to 20/s in 2.5. seconds calculate it’s acceleration

Mekhanik [1.2K]

Answer:

$\boxed {\boxed {\sf 4\ m/s^2}}$

Explanation:

Acceleration is the rate of change of an object with respect to time. It is the change in velocity over the time.

$a= \frac{v_f-v_i}{t}$

The car starts at 10 meters per second and increases to 20 meters per second in 2.5 seconds.

$v_f$ = 20 m/s
$v_i$ = 10 m/s
t= 2.5 s

Substitute the values into the formula.

$a= \frac{ 20 \ m/s - 10 \ m/s}{2.5 \ s }$

Solve the numerator.

$a= \frac{10 \ m/s}{2.5 \ s}$

Divide.

$a= 4 \ m/s/s$

$a= 4\ m/s^2$

The acceleration of the car is <u>4 meters per second squared.</u>

3 0

2 years ago

If momentum is conserved, what happened to velocity when mass changes?

kifflom [539]

Explanation:

The momentum of an object is given in terms of its mass and its velocity. The law of conservation of momentum says that the net momentum of a system remains conserved for an isolated system.

Momentum is given by :

p = m × v

If p is conserved, velocity is inversely proportional to the mass of an object. When mass changes, velocity also changes but inversely.

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3 years ago

Which of the following statements about the motion of an object is correct?

xxMikexx [17]

Answer:

Velocity describes how fast something is going, whereas Speed describes how fast something is going and in which direction.

Explanation:

. If the above statement is true, then describe an example of such a motion. ... b. What was the displacement for the entire trip? 0 miles (You finish where you started) ... Speed is a quantity that describes how fast or how slow an object is moving.

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3 years ago

A 9Ω resistance is cut into three equal parts and connected in parallel. Find the equivalent resistance of the combination.

sammy [17]

Answer:

the ans i 1 ohm

Explanation:

if i cut a resistor of 9 ohm into 3 equal parts then each resistor will have a resistance of 3 ohm and if they are in parallel combination the net resistance will be R

so 1/R=1/R1+1/R2+1/R3

1/R=1/3+1/3+1/3

R=1

7 0

2 years ago