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Physics

Keely Bell

What do cell phones require to work?

A. The GPS system

B. Ultraviolet rays

C. A cellular system

D. X-rays

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Physics

Konnor Bates

Josiah is going to have a cup of hot cocoa. If he wants the cocoa to stay warm as long as possible, which type of cup should he put his hot cocoa in? A.

a foam cup B.

a glass cup C.

an aluminum cup D.

an iron cup

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Physics

Gloria

Lightning is more likely to strike a metal tower than a rubber hose because:

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Physics

Dayanara Choi

Hi.

Indicate which of the following physics symbols denote units and which denote variables or quantities.

a. C

b. c (cursive)

c. C (cursive)

d. t (cursive)

e. T

f. T (cursive)

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Physics

Guest

Is the multiverse theory plausible?

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Physics

Odin Dunn

Is a theory related to perspective

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Physics

Guest

At which temperature will water boil when the external pressure is 31 kpa

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Physics

River Love

13.00 cm + 2.56 mm + 0.0047 = cm? Solve problem with correct number of significant digits

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Physics

Juliet Moore

Form of energy that exhibits wavelength behavior as it travels through space. Example: Mircrowave rays, U. V. rays.

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Physics

Hugh Skinner

Which of the following is the primary medium for beach erosion? ice gravity wind water

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Physics

Guest

A 75-kg snowboarder has an initial velocity of 5.0 m/s at the top of a 28 ∘ incline. after sliding down the 110-m long incline (on which the coefficient of kinetic friction is μk = 0.18), the snowboarder has attained a velocity v. the snowboarder then slides along a flat surface (on which μk = 0.15) and comes to rest after a distance x. part a use newton's second law to find the snowboarder's acceleration while on the incline and while on the flat surface.

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Physics

Aliyah Richardson

How chemical displacement reactions differ from a chemical decomposition reaction? "

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Physics

DJ

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 0.8 m/s2 for 4.4 seconds. It then continues at a constant speed for 13.5 seconds, before getting tired and slowing down with constant acceleration coming to rest 61.0 meters from where it started. The tortoise accelerates uniformly for the entire distance, finally catching the hare just as the hare comes to a stop.

1. How fast is the hare going 2.2 seconds after it starts?

2. How fast is the hare going 15.1 seconds after it starts?

3. How far does the hare travel before it begins to slow down?

4. What is the acceleration of the hare once it begins to slow down?

5. What is the total time the hare is moving?

6. What is the acceleration of the tortoise?

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Physics

Barney

You drive a car for 2.2 h at 45 km/h, then for another 2.2 h at 60 km/h. what is your average velocity?

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Physics

Evan Lam

What is the mass of a 735-N weight on Earth?

A. 73.5 kg

B. 75.0 kg

C. 334.1 kg

D. 725.2 kg

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