PHYSICS HIGH SCHOOL

Question 1 (Mandatory) (1 point)An 8 kg basketball is dropped from a height of 10 m. Calculate the Gravitational
Potential Energy of the ball.
0784 Joules
7,683 Joules
80 Joules
O 0.8 Joules

Answers

Answer 1
Answer:

Answer:

P.E=mgh \n = 8kg * 9.81m {s}^( - 2) * 10m = 784J

Related Questions

An engineer in India (standard household voltage = 220 volts) is designing a transformer for use on herupcoming trip to Canada (standard household voltage = 120 volts). If her input coil has 240 turns, how many turns should her output coil have?
Forces of attraction limit the motion of particles most inA. a solid. B. a liquid. C. a gas. D. both b and c
Four power transistors, each dissipating 12 W, are mounted on a thin vertical aluminum plate 22 cm 3 22 cm in size. The heat generated by the transistors is to be dissipated by both surfaces of the plate to the surrounding air at 25°C, which is blown over the plate by a fan. The entire plate can be assumed to be nearly isothermal, and the exposed surface area of the transistor can be taken to be equal to its base area. If the average convection heat transfer coefficient is 25 W/m2·K, determine the temperature of the aluminum plate. Disregard any radiation effects.
A 5,400 W motor is used to do work. If the motor is used for 640 s, about how much work could it do?
What properties are those that describe what happens when a substance reacts with another substance?

If you want to decrease the current created by a generator what can you do?

Answers

Answer:

To decrease the current;

1) Use fewer loops or number of turns

2) Use a lower speed of rotation of the coil in the magnetic field

3) Use a weaker magnetic

Explanation:

According to Faraday's Law of induction, which is the basis of the electromagnetism, electromagnetic induction and therefore the basis of the  electric generator, can be written as follows;

\epsilon = -N \cdot (\Delta \phi)/(\Delta t)

Where;

ε = The induced voltage

N = The number of turns (loops)

ΔФ = The change in the magnetic flux

Δt = The change in the time (the duration)

Given that voltage is directly related to the current, decreasing the voltage, decreases the current

To decrease the voltage, and therefore, the current we can;

1) Reduce the number of loops in the coil

2) Increase the time change per unit change in flux by slowing down the speed of rotation of the generator

3) Decrease the amount of change in the magnetic field per turn, by using a weaker magnetic

Explain why dissolving is a physical change

Answers

It's a physical change because it is changing from one matter to another.
because the kinetic energy start to decrease, for example if we put sugar in a high temperature tea and we shake it what will happen to the sugar will the kinetic energy increase or decrease, it will probably decrease, just like us the people when we enter a cold room and we have a hot temp.

Air pollution affects everyone equally. true or false

Answers

This is false. People with asthma or allergies are affected more than people without those conditions. 
False. There are people in different locations that do not use anything to pollute the air, so they have less pollution. There is also people who have asthma or react to pollution. Hope this helped!

Doing a warmup before exercise is important because it

Answers

Doing a warm-up before exercise is important because it strengthens your body and gets your body ready for the exercise you are about to do. If you do not do a warm-up, your body may grow tired a bit more quickly.

Hope this helped!

The least common shape for a galaxy is ______. irregular elliptical cluster spiral spherical

Answers

Answer:  cluster

Explanation:

There are four main shapes of galaxies: spiral, galaxies are divided into four main groups: spiral, lenticular, elliptical, and irregular, elliptical, and irregular.

The least common shape is cluster

Spiral galaxies- These are the most common. These have arms extending from a bright bulge in spiral shape.

Elliptical galaxy have ellipsoidal shape.

Lenticular galaxies - Intermediate between elliptical and spiral galaxies.

Irregular shape- No well defined shape

Spherical - Nearly spherical galaxies. These are least

cluster- group of galaxies having irregular shape is the least common shape.

Question: The least common shape for a galaxy _____.

Answer:Cluster

Climate gets colder closer to the poles becausea, the ice at the poles absorbs the Sun`s rays.

, atmospheric and oceanic clrulation patterns move cold air toward the poles.

c, heat from the poles is transferred toward the equaror.

d. the Sun`s rays are less concentrated near the poles.

Answers

Answer: The correct answer is- the Sun's rays are less concentrated near the poles.

The axis of the Earth is tilted, which causes the temperature difference between the Equator and polar regions of Earth.

Equator gets direct sunlight during the entire year whereas due to the tilted axis, polar regions are prevented to receive direct sunlight.

Also equator is aligned at 90 degrees to the sun, but as we move towards the poles, the angle of incident sunlight is increased exponentially.

So the intensity of the sun's rays is decreased or sunlight becomes less concentrated near the poles, resulting in colder climate closer to the poles.

Climate gets colder closer to the poles because the Sun`s rays are less concentrated near the poles. The answer is letter D. Also, the Earth is tilted causing the Sun’s ray to be farther from the poles.
Other Questions
Describe Earth's three global wind belts
What is the magnitude of the force a 1.5 x 10-3 C charge exerts on a 3.2 x 10-4 C charge located 1.5 m away?
The waves produced by earthquakes are known as seismic waves.
Help me on this question? log x-log 9=1