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2 years ago

What does it mean for a reaction to be endothermic? choose 2 of the following

Physics

2 answers:

trapecia [35]2 years ago

5 0

Answer:

A. to stop the reaction and C. to warm up reaction

Explanation: birb

Rainbow [258]2 years ago

3 0

Answer: I would choose options C and D

Explanation:

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Which best describes the transition from gas to liquid? (2 points) Select one: a. Energy must be removed because particles in li

Alenkinab [10]

Which best describes the transition from gas to liquid?

gas is @ higher energy state than liq. so the transition must remove energy. so ans is a. Energy must be removed because particles in liquid move more slowly.

8 0

3 years ago

Read 2 more answers

when mary took a cold thick-walled glass out of the refrigerator and placed it in boiling water, the glass cracked. Explain why

goldfiish [28.3K]

The outer surface of the glass expands faster than the inside surface since glass is a fairly good thermal insulator. The outer surface tries to expand without the inner surface doing so at the same time. This is the secret of Pyrex glass. It is more conductive to heat and the inner and outer surface expand (and contract) at the same time.

4 0

3 years ago

Momentum,

Serggg [28]

Answer:

THE WALL MOVES AWAY FROM THE BALL

Explanation:

NEWTON'S THIRD LAW STATES THAT THERE IS A OPPOSITE REACTION

5 0

3 years ago

The best way to reduce the number of disasters related to mass movements is to relocate people.

Kitty [74]

Answer:

The statement is false.

Explanation:

The downward movement of rock and boulders due to the force of gravity is known as mass movement.
Mass movement takes place continuously and is seen to occur in all slopes, some take place slowly and cause no damage while some are disastrous.
The best way to reduce the number of disasters related to mass movement is by educating the people about these and how to protect themselves, not by relocating.

4 0

3 years ago

An airplane has mass of 5,320 kg. At takeoff, how much lift force is necessary to accelerate the plane upward at a rate of 1.40m

Ira Lisetskai [31]

Answer:

<u>59637.2 N</u> force is required to lift the plane upward.

Explanation:

Mass of the aeroplane (m) = 5320 kg

Acceleration of the plane upward at a rate (a) = 1.40 m/s

"Newton's second law of motion", F - R = ma, where, "force" (F) acting on an object, (R) "resistive force", "mass" (m) of an object and "acceleration" (a).

Force = Resistive force + (mass × acceleration)

Resistive force = mass of an object × acceleration due to gravity. ( we know that acceleration due to gravity is $\left.9.8 \mathrm{m} / \mathrm{s}^{2}\right)$

Resistive force = 5320 × 9.81

Resistive force = 52189.2 N

Force = 52189.2 + (5320kg × 1.40 m/s)

Force = 59637.2 N

At takeoff, <u>59637.2 N</u> force is necessary to accelerate the plane upward at a rate of 1.40 m/s .

7 0

3 years ago