Choose all the answers that apply.

1 answer:

8 0

<span>According to Newton's first law of motion:

-- objects at rest will remain at rest unless acted upon by an outside force

-- objects in motion will remain in motion unless acted upon by an outside force

</span>

You might be interested in

A comet with a mass of 7.85 × 1011 kg is moving with a velocity of 25,000 m/s. calculate its kinetic energy.

Nadusha1986 [10]

The kinetic energy of an object is given by:
$K= \frac{1}{2}mv^2$
where
K is the kinetic energy
m is the mass of the object
v is its velocity.

The comet in our problem has a mass of $m=7.85 \cdot 10^{11} kg$ and a velocity of $v=25000 m/s$ , so its kinetic energy is:
$K= \frac{1}{2}(7.85 \cdot 10^{11} kg)(25000 m/s)^2=2.45 \cdot 10^{20}J$

6 0

3 years ago

An increase of 50 dB increases the sound intensity by a factor of

Artemon [7]

A factor of 50dB = a factor of 10^(50/10) = 10^5 = a factor of <em>100,000</em> .

5 0

4 years ago

Twoâ cars, 405 kilometersâ apart, begin driving toward each other on aâ long, straight highway. one car travels 70 kilometers pe

mart [117]

The space between the cars closes at (70+65)=135 km/hr. They collide in (405/135)=3 hours after they start moving. In 3 hours, the canary covers (100km/hr x 3)= 300 km.

8 0

4 years ago

The radius of wheel is 20 cm & that of axle is 5 cm in a wheel & axle. Calculate the velocity ratio of the machine. plea

kari74 [83]

Answer:

180 cm, what

2. The triangular side walls of a flyover have been used for advertisements. Theses

the walls are 122 m, 22 m and 120 m (see Fig. 12.9). The advertisements a

earning of 5000 per m per year: A company hired one of its walls for 3 months

much rent did it pay

Explanation:

3 0