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Lorico [155]
3 years ago
9

Can anyone please answer both of these questions?

Physics
1 answer:
Anestetic [448]3 years ago
6 0
A. YES. As speed is a scalar quantity, direction of movement doesn’t affect it.

B. Because the friction force due to air acting on the upper part of body of the person who is traveling on the roof of the running bus try to turn over which is dangerous for passengers while the lower portion remain at rest.
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An 80-kg hiker climbs to the top of a tall hill and builds up 470,000 J of gravitational potential energy. How high did the hike
nekit [7.7K]

Answer:

599 meters is the answer rounded to the nearest whole number and 599.489795918 meters is the complete answer

Explanation:

to find gravitational potential energy you multiply mass x acceleration due to gravity (always 9.8 on earth) x hight

since we know the gravitational potential energy and want to find out the hight, we take the gravitational potential energy (470,000) and divide it by the product of acceleration due to gravity x mass (9.8 x 80)

so how high the hiker climbed is equal to 470,000 divided by (9.8 x 80)

hight = 470,000 / (9.8 x 80)

hight = 470,000 / 784

hight = 599.489795918 meters

as for rounding, if the decimal is less than 5 you round "down" and keep the current whole number, if the decimal is 5 or greater you round "up" and add 1 to get your new number

5 0
3 years ago
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When grocery shopping, the mass of the cart changes as you start to fill up your cart. How does the change in mass of your cart
Tasya [4]

Answer:

b

Explanation:

4 0
3 years ago
2. Draw a ray diagram that shows the image
Lunna [17]

you have to draw diagram

6 0
2 years ago
Two dogs are pulling a disk, but the disk is not moving. The disk does not move because the forces are (select one: unbalanced,
tiny-mole [99]

Answer:

balanced?

Explanation:

because if it wasn't moving that means they are pulling at a similar strength

8 0
3 years ago
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You are leaving for a party at your cousin’s house in a city that is 150 km away. You will travel at an average rate of 50 km/hr
choli [55]
3 hours, because for every 50 km equals one hour 150 divided into 50 equals 3
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