Sar watts (12 risultati)

Paperback. Condizione: Very Good. The 73 scientific experiments described in this book can easily be done by children on their own, without the supervision of a parent or teacher. Explicit directions are given for each step, and the only equipment required can be found around the house. By working with such simple materials as steel wool, cotton, candles, eye-dropper, compass, cork, rubber tubing, coins and magnets, the young experimenter will become acquainted with dozens of the basic principles of physics, chemistry, mechanics, engineering, and many other fields.Following the step-by-step instructions, a child can learn to make an air-screw, mariner's compass, simple siphon, pinhole camera, thermometer, invisible ink, simple electric motor, periscope, boomerang, 3-D viewer, and many other interesting things. The exercises and demonstrations also show how to burn steel, find a center of gravity, make a vacuum with a radish, electrify a bubble, reflect sound, make water denser, compress air under water, carry a column of water, make a liquid sandwich, watch a pulse at work, etc. Each article gives some background information along with an explanation of why the experiment works the way it does.Over 100 photographs show children performing the experiments, and numerous line drawings depict the materials used, the set-up of equipment, and the desired result.…

Trade Paperback. Condizione: Like New. Trade Paperback. Fine. 73 Easy Experiements (No Special Equipment Needed).

Paperback. Condizione: New.

Paperback. Condizione: Very Good. The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged.

Paperback. Condizione: new. Paperback. The 73 scientific experiments described in this book can easily be done by children on their own, without the supervision of a parent or teacher. Explicit directions are given for each step, and the only equipment required can be found around the house. By working with such simple materials as steel wool, cotton, candles, eye-dropper, compass, cork, rubber tubing, coins and magnets, the young experimenter will become acquainted with dozens of the basic principles of physics, chemistry, mechanics, engineering, and many other fields.Following the step-by-step instructions, a child can learn to make an air-screw, mariner's compass, simple siphon, pinhole camera, thermometer, invisible ink, simple electric motor, periscope, boomerang, 3-D viewer, and many other interesting things. The exercises and demonstrations also show how to burn steel, find a center of gravity, make a vacuum with a radish, electrify a bubble, reflect sound, make water denser, compress air under water, carry a column of water, make a liquid sandwich, watch a pulse at work, etc. Each article gives some background information along with an explanation of why the experiment works the way it does.Over 100 photographs show children performing the experiments, and numerous line drawings depict the materials used, the set-up of equipment, and the desired result. Seventy-three easy experiments - requiring only materials found at home or easily available, such as candles, coins, steel wool, etc. - illustrate basic phenomena like vacuum, simple chemical reactions, and more. All safe. Modern, well-planned. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Paperback. Condizione: New.

Paperback. Condizione: New.

Soft cover. Condizione: Good - Age Spots and Marks. First Edition. S.A.R. Watts (illustratore).

Hardcover. Condizione: Good. Condizione sovraccoperta: Fair. Illustrated laminated boards with a little wear at the top and base of the spine. The jacket is not price-clipped but has some marks and some handling wear including rubbing and small creases, in places at the edges, chipping at the top and base of the spine with a little loss from the top. No publication date printed but is probably 1960s and must be before 1971 because the price on the jacket is in shillings. Photographed by S.A.R. Watts (illustratore).…

Paperback. Condizione: New.

Paperback. Condizione: New.

Paperback. Condizione: new. Paperback. The 73 scientific experiments described in this book can easily be done by children on their own, without the supervision of a parent or teacher. Explicit directions are given for each step, and the only equipment required can be found around the house. By working with such simple materials as steel wool, cotton, candles, eye-dropper, compass, cork, rubber tubing, coins and magnets, the young experimenter will become acquainted with dozens of the basic principles of physics, chemistry, mechanics, engineering, and many other fields.Following the step-by-step instructions, a child can learn to make an air-screw, mariner's compass, simple siphon, pinhole camera, thermometer, invisible ink, simple electric motor, periscope, boomerang, 3-D viewer, and many other interesting things. The exercises and demonstrations also show how to burn steel, find a center of gravity, make a vacuum with a radish, electrify a bubble, reflect sound, make water denser, compress air under water, carry a column of water, make a liquid sandwich, watch a pulse at work, etc. Each article gives some background information along with an explanation of why the experiment works the way it does.Over 100 photographs show children performing the experiments, and numerous line drawings depict the materials used, the set-up of equipment, and the desired result. Seventy-three easy experiments - requiring only materials found at home or easily available, such as candles, coins, steel wool, etc. - illustrate basic phenomena like vacuum, simple chemical reactions, and more. All safe. Modern, well-planned. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…