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2 years ago

Answer the following below.

Physics

1 answer:

Levart [38]2 years ago

3 0

Answer:

1. Radiation

2.Conduction

3.Radiation

4.Convertion

5.Convection

6.Conduction

7.Convertion

8.Conduction

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Where does matter come from?

Pie

The Big Bang theory is matter and energy in the universe exploded out from one point. As the explosion occurred, energy and matter spread outward and formed the universe. The matter from the Big Bang formed clouds of gas.

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2 years ago

An electron moving parallel to a uniform electric field increases its speed from 2.0 × 107 m/s to 4.0 × 107 m/s over a distance

jeka94

Answer:

$1.8\times 105 N/C$

Explanation:

We are given that

$u=2\times 10^7 m/s$

$v=4\times 10^7 m/s$

d=1.9 cm= $\frac{1.9}{100}=0.019 m$

Using 1m=100 cm

We have to find the electric field strength.

$v^2-u^2=2as$

Using the formula

$(4\times 10^7)^2-(2\times 10^7)^2=2a(0.019)$

$16\times 10^{14}-4\times 10^{14}=0.038a$

$0.038a=12\times 10^{14}$

$a=\frac{12}{0.038}\times 10^{14}=3.16\times 10^{16}m/s^2$

$q=1.6\times 10^{-19} C$

Mass of electron,m $=9.1\times 10^{-31} kg$

$E=\frac{ma}{q}$

Substitute the values

$E=\frac{9.1\times 10^{-31}\times 3.16\times 10^{16}}{1.6\times 10^{-19}}$

$E=1.8\times 105 N/C$

7 0

3 years ago

HELP I RLLY NEED HELP WITH THIS PLEASE HELP ME WHAT IS PHYSICAL SCIENCE ANYBODY???

Paul [167]

The sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects.

7 0

2 years ago

The gradient of a displacement-time graph gives

Drupady [299]

Answer:

Velocity

Explanation:

The gradient= change in velocity

——————————

Change in time

7 0

3 years ago

An 80-kg man climbs a 6-m ladder in 12 seconds. what is his average power expended?

Molodets [167]

If the ladder is vertical, then the work done in ascending equals his increase in potential energy.
For a man of mass (m) climbing height (h), the PE is (mgh), where g is the acceleration due to gravity.

If he does this in time t, his average power (rate of working) is:
mgh / t
= 80 * 9.81 * 6 / 12
= 392.4 W.

If the ladder is not vertical but inclined at an angle the horizontal, the power is mgh sin(a) / t.

7 0

2 years ago