science(physics)

Most popular questions
1. science(physics)

Why a minibus is more likely to topple over when the roof rack is heavily loaded than when the roof rack is empty?

asked by annie on January 17, 2017
2. Science(physics)

A spring 20cm long is stretched to 25cm by a load of 50N. What will be its length when stretched by 100N assuming that the elastic limit is not reached? I want the answer abd solving to this question and also the formula for young modulus of elasticity

asked by Rachel on January 19, 2016
3. science(physics)

the sum of three forces f1=100n, f2=80n, f3=60n acting on a particle is zero. The angle between f1 and f2 is: Please solve

asked by marley on June 9, 2011
4. science(physics)

a force f= 3i+cj+2k acting on a particle causes displacement , d=-4i+2j+3k. If the work done is 6 joule then the value of c. Plz. Solve

asked by marley on June 10, 2011
5. science(physics)

A powerful motorcycle can accelerate from rest to 28m/s in only 4 second . a.what is its average acceleration? b.how far does it travel in that time

asked by nancy on September 21, 2016
6. Science(physics)

A car of mass 1120 kg descends a hill of slope 1 in 5.calculate using the energy theory methods the average braking force required to bring the car to rest from 20m/s in 60m,assume the frictional resistance is 260N

asked by Ephraim on April 18, 2019
7. science(physics)

A bullet of mass 100g moving with20m/sec .Strikes a wooden plank and peretrates up to 20cm.Calculate the resistance offered by the wooden plank.

asked by Raj on July 27, 2016
8. Science(physics)

A fire hose held near the ground shoots water at a speed of 6.38 m/s. The water rises upwards in an arc then falls back to the ground. If the nozzle is pointed upwards at an angle of 56.53degrees, what distance away from the nozzle, in metres, does the

asked by melissa on October 1, 2009
9. Science(physics)

A boy while driving to his school covers at the average speed of 15km/h.On his return trip along the same route, covers at the average speed of 25km/h due to less traffic.What is the average speed for the whole trip

asked by Henry on January 8, 2017
10. SCIENCE(PHYSICS)

A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train

asked by YASH on May 22, 2011
11. science(physics)

a car of mass 100kg travering at 36km/h is brought to rest over a distance of 40m.calculate(a)accelaration(b)the average abreaking force

asked by luckson on January 28, 2016
12. science(physics)

two forces are in the ratio 1:2 named p and q.if their resultant is at an angle tan inverse root 3 /2 to vector p then the angle between p and q is ? Plz solve.

asked by marley on June 9, 2011
13. science(physics)

A 2kg stone is droped from the top of a 20m building a)what potential energy does it posses b)At what height does its potential energy become equal to its kinetic energy? c)what is its kinetic energy just before it hits the ground? d)With what velocity

asked by joe john on March 17, 2016
14. science(physics)

a object potential energy is described as 1/2kx^2. what does k and x represent? thanks. This is the PE in a stretched spring. k is the spring constant, x is the distance the spring is stretched (or compressed). Read up on Hookes' law.

asked by john on June 13, 2007
15. Science(physics)

A stone falls from rest for 8.0 second. a.)Calculate the stones velocity after 8.o second

asked by Rhea Mae on July 19, 2011
16. science(physics)

when two forces of magnitude p and q are perpendicular to each other their resultant is of magnitude 'r'. When they are at an angle of 180 degree to each other their resultant is 'r root 2'find the ratio of p and q.

asked by marley on June 9, 2011
17. SCIENCE(PHYSICS)

A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. My Solution:-1st hr. distance=40 multiplied by 0.2=8km 2nd hr.= 50 multiplied by 0.2=10km 3rd hr. =60 multiplied by 0.4=24 km

asked by YASH on May 25, 2011
18. science(physics)

Thank you very much for your help--I'm having trouble with this problem: what do i do? There are three point charges along the x axis: -4nC(0.5m left of y axis) 5nC(at origin) 3nC(0.8 right of y axis) I have to say what the electric field is at the point

asked by APPRECIATIVE STUDENT on January 20, 2011
19. science(physics)

Density is the ratio of mass to volume. Mercury has a density of 1.36 x 10^4 kg/m^3. What is the density of mercury in units of g/cm^3?

asked by jen on September 5, 2007
20. science(physics)

a ball of mass 8kg falls from rest from a height of 100m negleting a resistant calculate its kinetic energy after falling a distance of 30m (take gravity as 10m/s?

asked by williams on June 27, 2013
21. SCIENCE(PHYSICS)

A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. PLEASE SOLVE THE QUESTION WITH ANSWER AS I WAS NOT ABLE TO GET THE ANSWER

asked by YASH on May 23, 2011
22. SCIENCE(PHYSICS)

a train is moving on a straight track n travels at a speed of72km/hr and passes a pole in 3 seconds. find the time taken by the train to pass the bridge of length of 540 m?

asked by YASH on May 27, 2011
23. science(physics)

vector a+ vector b= 2i Vector a+ vector b=4j Then the angle between vector a and vector b is ? Plz.solve

asked by marley on June 10, 2011
24. science(physics)

two perons watch the sameobject move marty says it accleartes downward but joanne clams it falls along a curved path describe the condtions under which each person would be reporting correclty what they see.

asked by chris on March 31, 2011
25. science(physics)

hi -- thank you for your help before-- that makes sense-- also, im stuck on this: if there is a negative2.5 microcoulomb charge 1 m away from a 6microcoulomb charge, then at what point (other than infinity) is the electric field = zero? Sorry, i have no

asked by APPRECIATIVE STUDENT on January 20, 2011
26. science(physics)

A car goes from a dead stop to 25m/s in 5s going east. It keeps going then slows down after it reaches 60m/s. It is being drived on level ground. For the first 5s the magnitude of the velocity vector increases at a constant rate. What is the Instantaneous

asked by ~christina~ on August 1, 2007
27. science(physics)

the no of wave in 6cm of vacum is same as that of no of wave in xcm of medium refractive index of given medium is 3/2 find the value of x

asked by Anonymous on January 26, 2016
28. science(physics)

The stream of a river is flowing with velocity 1 km/h.What should be the direction of a swimmer to cross the river straight if he can swim at the rate of 2 km/h in still water.

asked by Anonymous on May 13, 2015
29. science(physics)

what is the distinction between magnitude of displacement over an interval of time and the total length of path covered by a particle over the same interval

asked by feven on May 8, 2012
30. science(physics)

given vectors , Vector a= 2i + 3j, then the angle between vector a and y axis is? Plz solve

asked by marley on June 10, 2011
31. SCIENCE(PHYSICS)

a train is moving on a straight track n travels at a speed of72km/hr and passes a pole in 3 seconds. find the time taken by the train to pass the bridge of length of 540 m? Sir in the solution i understood why we will get27 sec. but why we will add 3 sec?

asked by YASH on May 27, 2011
32. SCIENCE(PHYSICS)

A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED OF 72KM/HR AND PASSES A POLE IN 3 SECONDS. FIND THE TIME TAKEN TO PASS A BRIDGE OF LENGTH 540m. PLEASE SOLVE THE QUESTION AND ANSWER IT AS I WAS NOT ABLE TO ANSWER IT.

asked by YASH on May 23, 2011
33. SCIENCE(PHYSICS)

A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED OF 72KM/HR AND PASSES A POLE BIN 3 SECONDS. FIND THE TJME TAKEN TO PASS A BRIDGE OF LENGTH 540m

asked by YASH on May 22, 2011
34. science(physics)

give an example of projectile motion;include in your explantion the term velocity , accleration and displacement orginality in your example will be appreciated?

asked by chris on March 31, 2011
35. science(physics)

What is applied force?

asked by mark lester on August 12, 2008