Q2. Zara travelled in a train moving at an average speed of 120km/h and covered a distance of 40km towards East. Calculate the time taken by the train to cover this distance.

Answers

Answer 1
Answer:

Answer: 20 minutes

Explanation:

Given the following :

Average speed of train = 120km/hr

Distance = 40km.

The time take by the train moving at an average speed of 120km/hr to cover a distance of 40km due is ;

Recall:

Speed = distance / time

Therefore,

Time taken = distance covered / speed

Time taken = 40km / 120km/hr

Time taken = 1/ 3 hr

Therefore, 1/3 rd of an hour equals

1/3 × 60 = 20 minutes.

Time taken) 20 minutes

Answer 2
Answer:

Time taken by tain to cover distance is 20 minutes as:

Distance= 40 km

Speed= 120 km/h

Time= distance/speed

= 40/120

= 1/3 hour

= 20 min

or  =0.33 hrs

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What factors could slow down a reaction time?

Answers

Answer: To keep it basic start with temprature and inhibitors such as drugs that slow enzymes

surface area, temperature, concentration, and the presence of catalysts and inhibitors

Explanation:To slow down a reaction, you need to do the opposite. Factors that can affect rates of reactions include surface area, temperature, concentration, and the presence of catalysts and inhibitors. Temperature - Changing the temperature of a chemical reaction also affects the reaction rate.

Answer:

In driving, changes by fractions of a second in reaction time may mean the difference between a collision or the avoidance of one. On the road, distractions, speed, driving experience, and physical and cognitive fitness can seriously affect reaction times.

Explanation:

ig this

A diver who weighs 500 N steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of 8) _______ A) 10 J. B) 500 J. C) 5000 J. D) more than 5000 J. E) 510 J.

Answers

Answer:

C) 5000 J

Explanation:

when diver is at some height , he is having some energy in the form of potential energy. when he dives, his potential energy is converted into kinetic energy . so kinetic energy and potential energy are equal.

Kinetic energy of diver = potential energy of diver

= mgh

= 500 x 10

= 5000 J .

What is electromagnetic radiation?

Answers

Electromagnetic radiation is a form of energy that is produced by oscillating electric and magnetic disturbance. Visible light is one type of electromagnetic radiation. Like X-rays and infrared lights which are visible to human eyes.

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The acceleration due to gravity on the surface of Jupiter is about 2.5 times the acceleration due to gravity on Earth’s surface. What would be the weight of a space probe on the surface of Jupiter?A.2.5 times lighter than on Earth
B.6.25 times heavier than on Earth
C.2.5 times heavier than on Earth
D.6.25 times lighter than on Earth

Answers

Answer: The correct answer is option C.

Explanation:

Weight = Mass × Acceleration

Let the mass of the space probe be m

Acceleration due to gravity on the earth = g

Weight of the space probe on earth = W

W=m* g

Acceleration due to gravity on the Jupiter = g' = 2.5g

Weight of the space probe on earth = W'

W'=mg'=m* 2.5g

(W')/(W)=(m* 2.5g)/(m* g)

W'=2.5* W

The weight of the space probe on the Jupiter will be 2.5 times the weight of the space probe on earth.

Hence, the correct answer is option C.

Answer:

2.5 times heavier than on Earth

Explanation:

Which principle of training type overload time reversibility?

Answers

Answer:

The principle of training that is related to overload and time reversibility is the principle of Specificity.

A substance has a melting point of 0 degrees celsius and a boiling point of 100 degrees celsius. The substance is most likelya. water
b. hydrogen
c. gold
d. table salt

Answers

water. These physical properties are specific to water.