Which of these is always true about a real image?

The Burj Khalifa is the tallest building in the world at 828 m. How much work would a man with a weight of 700 N do if he climbe

8090 [49]

Answer:

579600J

Explanation:

Given parameters:

Height of the building = 828m

Weight of the man = 700N

Unknown:

Work done by the man = ?

Solution:

The work done by the man is the same as the potential energy expended.

Work done:

Work done = Weight x height = 700 x 828

Work done = 579600J

7 0

3 years ago

two bowling balls, a and b, each having a mass of 7.00 kilograms, are placed 3.00 meters apart. what is the magnitude of the gra

avanturin [10]

The magnitude of the gravitational force exerted by ball A on ball B is equal to 36.31 × 10⁻¹¹ N.

<h3>What is gravitational force?</h3>

Newton’s law of gravitation can be defined as every particle of matter in the universe attracting every other particle with mass with a certain force. The magnitude of gravitational force has a direct relationship with their masses.

Therefore, the gravitational force between two bodies can be written as:

$\displaystyle F =G\frac{M_1M_2}{r^2}$

Where G denotes the universal gravitational constant.

Given, the mass of the Ball A = Ball B = 7 Kg

The separation between the two balls, r = 3 m

The magnitude of the gravitational force applied by ball A on ball B can be determined as:

$\displaystyle F =6.67 \times 10^{-11} \times \frac{7\times 7}{(3)^2}$

F = 36.31 × 10⁻¹¹ N

Therefore, the gravitational force is equal to 36.31 × 10⁻¹¹ N.

Learn more about gravitational force, here:

brainly.com/question/12528243

#SPJ1

5 0

1 year ago

What voltage (potential difference)must be applied to a 26 1

12345 [234]

Answer:

26v

....................

3 0

3 years ago

a) Two protons in a molecule are 3.40 10-10 m apart. Find the electric force exerted by one proton on the other. magnitude 1.99e

kap26 [50]

Answer: a) $F_{e}=$ 1.99 x 10⁻⁹N

b) Electric force is 1.24 x 10³⁶ times larger than gravitational force

Explanation: Electric Force is an interaction between two charges at a distance. It is calculated as

$F_{e}=k\frac{|q||Q|}{r^{2}}$

k is electric constant that values 9 x 10⁹N.m²/C²

q and Q are the quantity of charges

r is distance between the charges

a) For the two protons, charge = 1.602 x 10⁻¹⁹C:

$F_{e}=9.10^{9}\frac{(1.602.10^{-19})(1.602.10^{-19})}{(3.4.10^{-10})^{2}}$

$F_{e}=$ 1.99 x 10⁻⁹ N

Magnitude of electric force between 2 protons is 1.99 x 10⁻⁹ N and it is repulsive because they are both positive

Gravitational Force is the force of attraction that acts between all materials.

It is proportional to the object's masses and inversely proportional to their squared distance:

$F_{g}=G\frac{mM}{r^{2}}$

G is gravitational constant that values G = 6.67 x 10⁻¹¹ N.m²/kg²

b) For the two protons, m = 1.67 x 10⁻²⁷kg

$F_{g}=6.67.10^{-11}\frac{(1.67.10^{-27})(1.67.10^{-27})}{(3.4.10^{-10})^{2}}$

$F_{g}=$ 1.61 x 10⁻⁴⁵N

Comparing electrical and gravitational forces:

$\frac{F_{e}}{F_{g}} =\frac{1.99.10^{-9}}{1.61.10^{-45}}$

$\frac{F_{e}}{F_{g}}=$ 1.24 x 10³⁶

This shows that electrical force is 1.24 x 10³⁶ times greater than gravitational force.

4 0

3 years ago

Technician A says that it is normal to find a little brake fluid behind the dust boot when you pull the dust boot from the wheel

fomenos

Answer:

Technician B

Explanation:

7 0

3 years ago