# Muhammad Umer

### How many types of Space exploration?

1 AnswerMathematics1 month ago### Suppose that G is a group with the property that for every choice of elements in G, axb = cxd but ab = cd. Prove that G is Abelian. ?

("Middle cancellation" implies commutativity.)

1 AnswerMathematics2 months ago### In a finite group, show that the number of nonidentity elements that satisfy the equation x^5 = e is a multiple of 5.?

If the stipulation that the group be finite is omitted, what can you say about the number of nonidentity elements that satisfy the equation x^5 = e?

Mathematics2 months ago### Here are four descriptions of the position (in meters) of a puck as it moves in an xy-plane:?

(1) x = -3t2 + 4t - 2 and y = 6t2- 4t

(2) x = - 3t3 - 4t and y = -5t2 + 6

(3) r = 2t2i – (4t+3) j

(4) r = (4t3– 2t) i +3 j

Is acceleration vector constant?

1 AnswerHomework Help3 months ago### A woman in a small motor-boat is trying to cross the river that flows due east with a strong current (high speed).?

The woman starts on the south bank and is trying to reach the north bank directly north from her starting point. In what direction she should move?

2 AnswersPhysics3 months ago### Two balls are thrown in the air at different angles, but each reaches the same height.?

Which ball remains in the air longer: the one thrown at steeper angle or the one thrown at shallower angle?

5 AnswersPhysics3 months ago### An ant starts at x = 20 cm on a piece of graph paper and walks along the x axis to x = -20 cm.?

It then turns around and walks back to -10 cm. What is the ant’s displacement and total distance covered?

1 AnswerPhysics3 months ago### Can an object have zero velocity and still be accelerating? (b) Can an object have a constant velocity and still have a varying speed?

In each case, give an example if your answer is yes; explain why if

your answer is no.

6 AnswersPhysics3 months ago### An object projected upward with initial velocity Vo attains a height h.?

Another object projected up with initial velocity 2va will attain a height of (a) ½ h, (b) 3h, (c) 4h, (d) same.

2 AnswersPhysics3 months ago