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3 years ago

Which type of experiment involves changing only one variable at a time

Physics

2 answers:

BlackZzzverrR [31]3 years ago

6 0

Controlled Experiment

muminat3 years ago

3 0

Answer:

Controlled experiment

Explanation:

the correct answer is Controlled experiment

To test certain variable scientist sometimes manipulate the experiment by allowing change of only one variable at one time this experiment is known as a controlled experiment.

A controlled experiment is done in an experiment to get to see the effect on the specimen by changing the variables.

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1)the car's engine power is 44000W. Explain this number in a physical sense

Ratling [72]

Answer:

1) It expresses the rate (top speed) at which it can move with time.

2) P = 20 W

3) h = 18 km

Explanation:

1) Power is the rate of transfer of energy.

⇒ Power = $\frac{Energy(or workdone)}{Time}$

i.e P = $\frac{E}{t}$

Thus a car's engine power is 44000W implies that the engine of the car can propel the car at this rate. This expresses the rate (top speed) at which it can move with time.

2) m = 400g = 0.4 kg

t = 20 s

h = 100m

g = 10 m/ $s^{2}$

P = $\frac{mgh}{t}$

= $\frac{0.4*10*100}{20}$

= $\frac{400}{20}$

P = 20 W

3) u = 600 m/s

g = 10 m/ $s^{2}$

From the third equation of free fall,

$V^{2}$ = $U^{2}$ - 2gh

V is the final velocity, U is the initial velocity, h is the height.

0 = $(600)^{2}$ - 2 x 10 x h

0 = 360000 - 20h

20h = 360000

h = $\frac{360000}{20}$

= 18000

h = 18 km

The maximum height of the bullet would be 18 km.

3 0

3 years ago

You dribble a basketball while walking on a basketball court. List and describe at least 3

Airida [17]

Answer:

1. You push on the ball and the ball pushes on your hand .

2. The ball hits the ground and the ground pushes back on the ball .

3. You walk on the ground with your feet and the ground pushes back on you.

Explanation:

4 0

4 years ago

Read 2 more answers

What is the kinetic energy of a 750 kg car moving at 50.0 km h?

Step2247 [10]

The kinetic energy of a 750 kg car moving at 50.0 km h is 72300 joules.

Given,

mass of car (m)= 750 kg

speed of car (v)= 50 km/h

= 50 x 5/18

= 13.9 m/s

we know that kinetic energy= 1/2 x m x v*v

= 1/2 x 750 x 13.9 *13.9

= 72300 joules

so the kinetic energy is 72300 joules.

Energy is the capacity of an object to do work, and like work, energy's unit is the joule (J). Energy exists in many different forms, but the one we think of most often when we think of energy is kinetic energy. Kinetic energy is often thought of as the energy of motion because it is used to describe objects that are moving.

Learn more about kinetic energy here :-

brainly.com/question/999862

#SPJ4

4 0

1 year ago

The fiugure below shows a birds eye view of ta car going around a highway curve

luda_lava [24]

Okay whats the question though?

5 0

4 years ago

What is the maximum force that could be applied to anterior cruciate ligament (ACL) if it has a diameter of 4.8 mm and a tensile

vovangra [49]

Answer:

Maximum force, F = 1809.55 N

Explanation:

Given that,

Diameter of the anterior cruciate ligament, d = 4.8 mm

Radius, r = 2.4 mm

The tensile strength of the anterior cruciate ligament, $P=100\times 10^6\ N/m^2=10^8\ Pa$

We need to find the maximum force that could be applied to anterior cruciate ligament. We know that the unit of tensile strength is Pa. It must be a type of pressure. So,

$F=P\times A\\\\F=10^8\times \pi (2.4\times 10^{-3})^2\\\\F=1809.55\ N$

So, the maximum force that could be applied to anterior cruciate ligament is 1809.55 N

4 0

4 years ago