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3 years ago

14

A projectile is fired vertically from earth's surface with an initial speed of 5.3 km/s. neglecting air drag, how far above the

surface of earth will it go?

1 answer:

MaRussiya [10]3 years ago

6 0

It will rise, and then fall back to the Earth’s surface.

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How can people reach their full potential?

PolarNik [594]

If they have self motivation or others motivation, they will show their full potential.

6 0

3 years ago

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.

8 0

2 years ago

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in series with a bat

Aleksandr-060686 [28]

The answer is D. The current in the battery and in each resistor is the same.

If we have two or more components in series, the current that flows through each of them is the same.

In this case, the battery generates the current, and since there must be conservation of electric charge, no current can be lost through the resistors.

7 0

2 years ago

When a positive charge is released and moves along an electric field line: it moves to a position of lower electric potential an

Tju [1.3M]

Hi there!

<u>False. </u>

Imagine if we released a positive charge between two parallel charged plates (one negative, and the other positive).

Since like charge repels, the positive charge would be repelled by the positive plate and would move towards negative plate, as opposite charge attracts.

The Electric potential of the POSITIVE charge increases as you move closer to the positive plate, with the potential decreasing as you move closer to the negative plate. Since the positive charge will accelerate towards the negative plate, it is LOSING electric potential energy.

As it loses electric potential energy, due to the conservation of energy, it must GAIN kinetic energy. There is work being done on the positive charge due to the potential difference between the plates, which increases its kinetic energy.

Therefore, the given statement is false.

8 0

2 years ago

During which time interval does the object travel approximately 10 meters?

olga_2 [115]

ANSWER

C. 5 seconds to 7 seconds

EXPLANATION

This is a velocity time graph.

We can read the final velocity, v,the initial velocity u and the time easily from the graph.

See attachment for the initial and final velocities on each time interval.

So we can use either of the following equations to calculate the distance traveled.

$s=ut+\frac{1}{2}at^2$

Or

$s=(\frac{u+v}{2})t$ .

During the time interval 0 to 3, the distance traveled is,

$s=(\frac{10+6}{2})3=24m$ .

During the time interval 3 to 5 seconds, the distance traveled is,

$s=(\frac{6+5}{2})2=11m$ .

During time interval, 5 to 7 seconds the distance traveled is,

$s=(\frac{5+4.9}{2})2=9.9$ .

$\Rightarrow s\approx 10m$

During time interval 7 to 8 seconds the distance traveled is

$s=(\frac{4.9+3}{2})1=3.95m$ .

During time interval 8 to 10 seconds the distance traveled is

$s=(\frac{3+0}{2})2=3m$ .

The correct answer is C.

8 0

2 years ago