PHYSICS MIDDLE SCHOOL

35m/s west can be an answer in velocity true or false

Answers

Answer 1
Answer:

Answer:

True........................
Answer 2
Answer:

Yes, it has a speed and a direction, and that makes a velocity. So it's True.

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Answer my question plzz !!
any body

Answers

Answer:

The height is 80 meters.

Explanation:

The equation for the distance in the second segment of the fall is as below. In it, we use the initial velocity v1 that the ball had after completing the first segment. From this equation, v1 can be determined:

h_2 = (1)/(2)gt_2^2+v_1t_2=0.5\cdot 10(m)/(s^2)\cdot 4 s^2+v_1\cdot 2 s=60m\implies\nv_1 = 20(m)/(s)

Next, we use the kinematic equation for velocity at the end of the first segment of a free fall, to determine h1:

v_1^2 = 2gh_1+v_0^2 = 2gh_1\implies h_1 = (v_1^2)/(2g)=20m

The total height is then

h = h_1 + h_2 = 20m + 60 m = 80m

What is average kinetic energy

Answers

The average kinetic energy of all the particles inside a substance is the temperature.

Which of the following has the lowest U value?a. plywood
b. poured concrete
c. expanded polyurethane
d. asbestos shingles

Answers

Answer:

c. expanded polyurethane

Explanation:

Thermal performance of a building fabric is measured in terms of heat loss and is expressed as U-value or R-value. U-value is the rate of heat transferred through a structure divided by the difference in temperature across the structure with a unit of measurement of W/m²K.You can calculate the U-value of a by getting the reciprocal of the sum of thermal resistances , R, making the building material.

If you have the value of R, then U=1/R

Material                         size            R                      U

plywood                          1"              1.25                0.8

Poured concrete            2"              0.99               1.010

Expanded polyurethane  1"            6.5                   0.1538

Asbestos shingles            1"             0.03                33.33

The material with lowest U-value is expanded polyurethane

What occurs when the moons shadow falls on the earth's surface

Answers

the term for this is "solar eclipse" and it's when the moon comes between the sun and earth casting a shadow over earth.

Which of the following statements best describes the movement of particles in a liquid?A.
they do not move
B.
they vibrate
C.
they slide around each other
D.
they fly around freely

Answers

Matter is anything that is made up of atoms. The matter word is mainly used in science. Therefore Option C are correct option.

What is matter?

Matter is a substance that has some mass and can occupy some volume. . Matter can be solid, liquid or gas.

In case of solid, particles are fixed at its mean position, they do not move at all. In gas, particles move very fast. They do not remain at its mean position. They continuously keep on moving with high kineticenergy called Brownian motion. In liquid particles are moveable, they are neither very stiff nor they move very fast. There is surface tension between the particles and the layers of liquid. Therefore, the layers of liquid just slide around each other. And this property of liquid is the reason for its fluidity.

Thus option c is correct option

To learn more about matter, here:

brainly.com/question/4562319

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Answer:

C

Explanation:

Hope this helps :)

What is the name for the force that pushes electrons along in a circuit?

Answers

You're question should really be "what pushes current through a circuit". Current is simply the flow of electrons in a circuit. Electricity is a quite difficult concept to grasp. If you imagine the current as the water in a pipe then the voltage would be the pressure forcing it through the pipe.

Final answer:

The force that pushes electrons along in a circuit is called the electric field.

Explanation:

The force that pushes electrons along in a circuit is called the electric field. The electric field in a wire points from the higher potential end to the lower potential end and provides the force necessary to keep the electrons moving. The electrons, carrying a negative charge, move on average in the opposite direction of the electric field.

Learn more about electric field here:

brainly.com/question/37315237

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