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3 years ago

A speeding car collides with an unlucky bug flying across the road

2 answers:

7 0

The car has more momentum. (A)*
Also, the car is made out of more resilient material than the bug is.

* Unless the bug is much bigger than the car.

guapka [62]3 years ago

6 0

Answer:

A: The car has more momentum

Explanation:

When we discuss collisions, we are usually referring to a change in momentum. If a car crashes into a wall, then all the momentum that the car had acts on the wall and either decreases (this is where a car would drive through a wall), or change to zero (where the wall would withstand the force).

In this case, the bug and the car have different values of momentum. The car obviously has more because it is both heavier and can be assumed to be travelling a lot faster, this means that there is a negligible amount of force in the opposite, from the bug.

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You can make a solute dissolve more quickly in a solvent by

Gekata [30.6K]

Answer:Stirring.

Explanation:Stirring a solute into a solvent speeds up the rate of dissolving because it helps distribute the solute particles throughout the solvent. For example, when you add sugar to iced tea and then stir the tea, the sugar will dissolve faster.

3 0

3 years ago

The y-axis of a position-time graph represents__________.

Sladkaya [172]

Answer:position relative to the starting point

Explanation:

5 0

3 years ago

Calculate the mass of air of density 1.2kgm-3 in a room of dimensions 8m by 6m by 4m.

77julia77 [94]

Answer:

230.4kg

Explanation:

volume of the room = l× b×h

volume= 8×6×4

volume=192m3

density= mass/volume

hence mass= density × volume

mass= 1.2kgm-3 × 192m3

mass= 230.4kg

5 0

2 years ago

An object moving with constant acceleration near the surface of the earth

ziro4ka [17]

The answer is C because if it’s moving with a constant speed it’s gonna be balanced and there will be no force

6 0

3 years ago

Answer it asap I promise i will mark them the Brainly

nataly862011 [7]

Answer:

A) The acceleration is zero

B) The total distance is 112 m

Explanation:

Velocity vs Time Graph

It shows the behavior of the velocity as time increases. If the velocity increases, then the acceleration is positive, if the velocity decreases, the acceleration is negative, and if the velocity is constant, then the acceleration is zero.

The graph shows a horizontal line between points A and B. It means the velocity didn't change in that interval. Thus the acceleration in that zone is zero.

A. To calculate the acceleration, we use the formula:

$\displaystyle a=\frac{v_2-v_1}{t_2-t_1}$

Let's pick the extremes of the region AB: (0,8) and (12,8). The acceleration is:

$\displaystyle a=\frac{8-8}{12-0}=0$

This confirms the previous conclusion.

B. The distance covered by the body can be calculated as the area behind the graph. Since the velocity behaves differently after t=12 s, we'll split the total area into a rectangle and a triangle.

Area of rectangle= base*height=12 s * 8 m/s = 96 m

Area of triangle= base*height/2 = 4 s * 8 m/s /2= 16 m

The total distance is: 96 m + 16 m = 112 m

4 0

3 years ago