Physics » Page 50

Physics

Georgia Ryan

There are 152 steps between the ground floor and the sixth floor in a building. Each step is 16.2 cm tall. It takes 3 minutes and 35 seconds for a person with a mass of 59.5 kg to walk all the way up. How much work did the person do?

Answer Answers (1)

Physics

Guest

A rock is dropped from the surface into a pit. It hits the bottom of the pit in 5.0 seconds. A second rock is then dropped into a second pit, where it hits the bottom in 10 seconds. How much deeper is the second pit compared to the first pit? Neglect air resistance

Answer Answers (1)

Physics

Hailey Middleton

A group of humans traveling in space discover a habitable planet. They settle down there and start populating it. Their population grows at a steady rate and doubles every 10 years. Thousand years after the first group of humans arrived, the planet is filled to half its carrying capacity. How many more years are there to reach the carrying capacity of the planet? Assume there are no resource crisis and they grow at the same rate. A) 500 years

B) 1000 years

C) 5 years

D) 1 year

E) 10 years

Answer Answers (1)

Physics

Morgan Nixon

A bird can fly 25 km/h how long does it take to fly 3.5km

Answer Answers (1)

Physics

Kathryn Macias

A clam of mass 0.12 kg dropped by a seagull takes 3.0 s to hit the ground. [Neglect friction.]

What is the velocity of the clam when it strikes the ground? [Show all work, including the equation and substitution with units.]

Answer Answers (1)

Physics

Garrett Fisher

What could cause a physical change in a bar of steel

Answer Answers (2)

Physics

Cassie Snyder

A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. At 30.1°, the block starts to slide down the incline, traveling 3.40 m down the incline in 2.30 s. Calculate the coefficient of static friction between the block and the plank. Motion of a block Submit Answer Tries 0/12 Calculate the kinetic coefficent of friction between the block and the plank.

Answer Answers (1)

Physics

Rin Tin Tin

A quarterback throws a football down the field to the receiver. What type (s) of energy does the football possess? Check all that apply. chemical electrical kinetic mechanical potential

Answer Answers (2)

Physics

Guest

Is the author of the article suggesting that we will be able to maintain CO2 levels in the future? Which selection from the article BEST supports your answer?

A.

Yes. "The average growth rate is remaining on the high end. The increase from last year will probably be around three parts per million whereas the recent average has been 2.5 ppm."

B.

No. "Their work is responsible for creating the Keeling Curve, a graph that shows CO2 accumulations. In May 2018, CO2 concentrations reached 410 ppm."

C.

No. "Looking ahead, a study from the University of Michigan found that CO2 emissions could soar to levels not seen in 56 million years by the middle of the next century."

D.

Yes. "Though it won't happen in our lifetimes, it could very well happen in the lives of our grandchildren or great-grandchildren."

Answer Answers (2)

Physics

Jayda Clarke

What is the mechanical adventure of a machine with an input force of 63 pounds and an output force of 275 pounds?

Answer Answers (1)

Physics

Hugh Bartlett

Consider the equation S + O2 - S02. What is the product?

Answer Answers (1)

Physics

Tia Walters

The fine detail of Saturn's rings provides evidence that the planet may be:

A. young

B. millions of years old

C. in a state of growing larger

Answer Answers (2)

Physics

Rohan Hickman

What energy transformation occurs when a skydiver first jump off a plane

Answer Answers (1)

Physics

Gordon Carpenter

How much current would flow in a device powered by four 1.5 V batteries through a bulb that had a resistance of 51.0 ohms?

Answer Answers (1)

Physics

Tyshawn Swanson

A 20-N force applied to the handle of a door produces a 44-N output force. What is the AMA of the handle?

Answer Answers (1)