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ossidianaZ
2020-12-01
Answered

Here is problem, please help

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2k1enyvp

Answered 2020-12-02
Author has **94** answers

Solution

asked 2021-02-18

In an industrial cooling process, water is circulated through a system. If the water is pumped with a speed of 0.45 m/s under a pressure of 400 torr from the first floor through a 6.0-cm diameter pipe, what will be the pressure on the next floor 4.0 m above in a pipe with a diameter of 2.0 cm?

asked 2021-01-31

For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed out of the heart in a direction that is nearly parallel to the platform. Since momentum must be conserved, the body and the platform recoil, and this recoil can be detected to provide information about the heart. For each beat, suppose that 0.050 kg of blood is pushed out of the heart with a velocity of +0.30 m/s and that the mass of the patient and the platform is 85 kg. Assuming that the patient does not slip with respect to the platform, and that the patient and the platform start from rest, determine the recoil velocity.

asked 2021-02-21

A 1.0-m rope is used to whirl a 0.75-kg ball in a vertical circle. When the tension is greater than 450 N, the rope will snap. How fast can the ball travel at the bottom of the circle before the rope snaps?

A) 38 m/s

B) 16 m/s

C) 12 m/s

D) 24 m/s

E) 32 m/s

asked 2021-04-25

A stunt man whose mass is 70 kg swings from the end ofa 4.0 m long rope along thearc of a vertical circle. Assuming that he starts from rest whenthe rope is horizontal, find the tensions in the rope that are required to make him follow his circular path at each of the following points.

(a) at the beginning of his motion N

(b) at a height of 1.5 m above the bottom of the circular arc N

(c) at the bottom of the arc N

(a) at the beginning of his motion N

(b) at a height of 1.5 m above the bottom of the circular arc N

(c) at the bottom of the arc N

asked 2022-01-14

I need help with a few introductory physics prelab questions.

1) An object moves 15 meters in 3 seconds. What is its velocity (in m/s)?

2)What is the velocity (in cm/s) of an object which moves 44 m in 2 s?

3) The charge of an electron is$-1.60\times {10}^{-19}$ C. Determine the charge to mass ratio of the electron (in 1011 C/kg). (Hint: divide the electron's charge by its mass; the answer is a negative number with a positive exponent)

4) What is the average velocity (in kilometers per hour) of a cart that travels 100 km in 5 hours?

1) An object moves 15 meters in 3 seconds. What is its velocity (in m/s)?

2)What is the velocity (in cm/s) of an object which moves 44 m in 2 s?

3) The charge of an electron is

4) What is the average velocity (in kilometers per hour) of a cart that travels 100 km in 5 hours?

asked 2021-04-26

A girl and her bicycle have a total mass of 35 kg. At the top of a hill her speed is5 m/s. The hill is 11 m high and 100 m long. If the force of frictionas she rides down the hill is 15 N,what is her speed at the bottom?

asked 2021-12-16

Find the centroid of the region bounded by the given curves.

$y={x}^{3},\text{}x+y=30,\text{}y=0$