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Physics

1 answer:

enot [183]3 years ago

6 0

Answer: 3 square feet

Explanation: I took the test

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What is the formula for calculating the efficiency of a heat engine? Answers:

Setler [38]

Efficiency of heat engine is determined by the ratio of difference in temperature of cold from hot reservoir to the temperature of hot reservoir over temperature of hot reservoir.

7 0

3 years ago

What is electric force

AysviL [449]

Electric force occurs between positive and negative electric charge. It can be calculated with formula $F=\frac{Q_1Q_2}{A\epsilon_0\epsilon_r}$ where F is force, Q1 and Q2 are charges, A is area of object usually ball ( $A=4\pi r^2$ ) because we describe charges as points in space like electrons and protons, $\epsilon_0$ is a natural dielectric constant of empty space or vacuum ( $\epsilon_0=8.85\times10^{-12}\mathsf{\frac{As}{Vm}}$ ) and $\epsilon_r$ also known as relative dielectric variable.

There are two types of the force:

1. Attractive electric force

2. Repulsive electric force

Attractive electric force occurs between positively and negatively charged objects while repulsive occurs between equally charged objects for eg. (positive and positive will repulse).

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3 years ago

Create your own food chain

laila [671]

Answer:

Food Chain. A food chain shows you how one organism eats another and transfers its energy. For example, a zebra eats grass, and the zebra is eaten by the lion.

5 0

3 years ago

Ned the skydiver weighs 600 N and is falling at terminal speed. That is, he has sped up until air resistance has built up so muc

natali 33 [55]

Answer:

The work done is 120000 J.

Explanation:

Given that,

Weight = 600 N

Distance = 200 m

We need to calculate the work done

Using formula of work done