Accelaration is a derived quantity .Give reason

Answers

Answer 1

Answer:

Answer:

The accerlation is a derived from the other quantities like change in velocity/time take etc.

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According to the information in your study unit, which of the following locations requires the highest illuminance? A. A residential stairway
B. A school locker room
C. A bank lobby
D. A study area

Answers

The correct answer is letter D. A study area. According to the information in your study unit, the location that requires the highest illuminance is the study room because it is the place the students can stay to study. The more brighter the place is, the more people are using that area.

A force of 1500 pounds drags a truck 40 feet in 20 seconds. How much work is accomplished? How much power was required?

Answers

Answer:

The work done and power are 60000 Pounds-feet and 3000 Pounds-feet/sec.

Explanation:

Given that,

Force F = 1500 pounds

Distance d = 40 feet

Time t = 40 sec

Work done :

The work done is the product of the force and distance.

The work done is defined as,

$W = F * d$

Where, W = work

F = force

d = distance

Put the value into the formula of work

$W= 1500*40$

$W = 60000\ Pounds-feet$

Power:

The power is equal to the work done divided by time.

The power is defined as,

$P = (W)/(t)$

Where, P = power

W = work

t = time

Put the value into the formula of power

$P = (60000)/(20)$

$P=3000\ Pounds-feet/s$

Hence, The work done and power are 60000 Pounds-feet and 3000 Pounds-feet/sec.

work = f x s = 1500 x 40
power = w/t = (1500 x 40) / 20

The mass of a lamb that weighs 110 n is about a. 1 kg.
b. 11 kg.
c. 110 kg.
d. 1100 kg.
e. none of the above

Answers

A lamb that weighs 110 N has a mass of around 11 kg. Hence, option B is correct except B all options are incorrect.

What are Mass and Weight?

The mass of a physical body is a measure of its entire makeup. Inertia, or the body's resistance to acceleration when a net force is applied, is also measured by this term. The strength of a body's gravitational pull on other bodies is also influenced by its mass. The kilogram is the fundamental mass unit of the SI.

In physics and engineering, the weight of an object refers to the gravitational force that pulls on it. Weight is the term used in many widely used textbooks to describe the gravitational force acting on the object. Some people think of weight as a scalar quantity that gauges the gravitational force's strength.

According to the question, the given values are :

Weight, w = 110 N and,

Taking value of g = 10 m/s²

As we know that :

w = m × g

110 = m (10)

m = 11 kg

Hence, the mass of the lamb will be 11 kg.

To get more information about Mass and weight :

brainly.com/question/28122305

#SPJ5

g = 10 m/s²
w = 110 N

w = m x g
110 = m x 10
110 = 10 m
m = 110/10 = 11 kg

How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m? the acceleration due to gravity is 9.8m / s^2

Answers

$E_k=mgh\n\nm=7.2\ kg\n\ng=9.8\ m/s^2\n\nh=1.2\ m\n\nE_k=7.2\cdot9.8\cdot1.2=84.672\ \left[(kgm^2)/(s^2)\right]=84.672\ [J]$

Assuming that no energy is wasted,
Use the equation Gpe=mgh
Mass*gravity*height
1.2*7.2*9.8=
84.672
(The answer might be wrong I did it in my head)

If the current in the circuit above is 10 amps and the resistance is 3 ohms, what is the voltage?

Answers

It's really difficult to make out the circuit above. Quite frankly, your
question leaves me to wonder how far 'above' it may be.
The best I can do will be to try and fabricate an answer based on the
information given in the text of the question, augmented only by my own
training, chutzpah, and life experiences.

If the circuit ... wherever it is ... consists entirely of the single 3-ohm
resistance and no other components, and the current through the
resistance is 10 Amperes, then

Voltage = (Current) x (resistance) = 30 volts .

In which of these cases do we have enough information to say that the atom is electrically neutral? A. The atom has 4 neutrons and 4 protons.
B. The atom has 7 protons and 7 electrons.
C. The atom has 19 electrons and 19 neutrons.
D. The atom has 15 neutrons and 15 electrons.

Answers

So we want to know when do we have enough information about the atom that we can say that it is electrically neutral. So the information we need to know is the number of protons, whic are positively charged particles and the number of electrons which are negatively charged particles. Number of protons has to be equal to number of electrons for the atom to have neutral charge. Neutrons are electrically neutral so their number doesn't change the charge of the atom. So the correct answer is B.

b. 7 protons and 7 electrons, just took the test

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