Calculate the potential energy of 5.0g (0.005 kg) paper airplane 5.0 meters above the ground

maw [93]

Answer:

Free electrons in a conductor

Explanation:

Current in a conductor is due to flow or motion of the free electrons in it.

The electric current is the flow of electrons in a conductor. The force that causes the current flow through a conductor is called the voltage.

Hope this helps you out! : )

4 0

3 years ago

6. Two blocks are released from rest at the same height. Block A slides down a steeper ramp than Block B. Both ramps are frictio

Stolb23 [73]

Answer:

a. the work done by the gravitational force on Block A is less than the work done by the gravitational force on Block B.

b. the speed of Block A is equal to the speed of Block B.

c. the momentum of Block A is less than the momentum of Block B.

Explanation:

a. The work done by the gravitational force is equal to:

w = m*g*h

where m is mass, g is the standard gravitational acceleration and h is height. Given that both blocks are released from rest at the same height, then, the bigger the mass, the bigger the work done.

b. With ramps frictionless, the final speed of the blocs is:

v = √(2*g*h)

which is independent of the mass of the blocks.

c. The momentum is calculated as follows:

momentum = m*v

Given that both bocks has the same speed, then, the bigger the mass, the bigger the momentum.

8 0

3 years ago

A heating coil inside an electric kettle delivers 2.2 kW of electrical power to the water in the kettle. How long will it take t

Otrada [13]

Answer:

0.04s

Explanation:

Specific heat of water c = 4.186J/g.C

The heat energy it would take to heat up 0.5 kg of water from 30C to 72 C is

$E = mc\Delta T = 0.5 * 4.186 * (72 - 30) = 87.9 J$

If the power of the electric kettle is 2.2kW (or 2200W) and suppose the work efficiency is 100%, then the time it takes to transfer that power is

$t = \frac{E}{P} = \frac{87.9}{2200} = 0.04 s$

8 0

3 years ago

A force is a vector that has both ______ and direction.

My name is Ann [436]

A force is a vector that has both magnitude and direction.

Explanation:

A force is defined as the amount of pull or push experienced by a body. The force acting on a body can bring about the change in the state of rest or motion of a body.

The physical quantities are broadly divided into two categories.

Scalar Quantities
Vector Quantities

The scalar quantities are the quantities that have only magnitude and do not require any direction for their representation whereas the vector quantities on the other hand are the quantities that require the magnitude as well as the direction for their representation.

The speed of a body is considered to be a scalar quantity whereas the velocity of the body considered as the vector because the velocity requires the direction along with the magnitude.

Similarly, the distance of a body is the length of a path covered by the body from the initial point. So, it is scalar but the displacement is the shortest distance between the initial and final point. SO, it is termed as vector as it has direction.

Similarly, the force acting on a body requires the magnitude as well the direction for the complete expression of the force.

Thus, A force is a vector that has both magnitude and direction.

Learn More:

1. The term that identifies scalar quantity brainly.com/question/498779

2. Which one is not a component of a lever brainly.com/question/1073452

3. The amount of kinetic energy of an object depends on brainly.com/question/137098

Answer Details:

Grade: High School

Subject: Physics

Chapter: Scalars and Vectors

Keywords:

force, pull, push, experienced, vector, scalar, magnitude, direction, body, speed, velocity, distance, displacement, representation, quantity.

8 0

3 years ago

You're out for run. Your initial velocity is 1.5 m/s. Suddenly a crazy dog starts chasing you and you accelerate to a velocity o

Stolb23 [73]

The displacement of your motion during the entire motion is 22.5 m

The given parameters;

your initial velocity, u = 1.5 m/s
your final velocity , v = 3 m/s
time of motion, t = 10 s

The displacement of your motion during the entire motion is calculated from your average velocity and time of motion.

This magnitude of this displacement is calculated as follows;

$s = (\frac{u+ v}{2} )t\\\\s = (\frac{1.5 + 3}{2} ) \times 10\\\\s = 22.5 \ m$

Thus, the displacement of your motion during the entire motion is 22.5 m.

Learn more here: brainly.com/question/17345815

7 0

2 years ago