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3 years ago

As you brake your bicycle, your velocity changes from 20 east m/s to 10 east m/s in 5 seconds.

Physics

1 answer:

Dmitry_Shevchenko [17]3 years ago

7 0

Answer:

-2 would be your acceleration

Explanation:.

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The ability to clearly see objects at a distance but not close up is properly called ________. The ability to clearly see object

melamori03 [73]

Answer:

Hyperopia

Explanation:

In hyperopia ,people face difficulties to see close up object , but can see object easily which are at a distance.

The main reason of hyperopia is our eyeball.When our eyeball become too short , then light focus behind the retina. Sowe will face problem to see near object but we can see distance object easily. Hyperopia is the opposite of nearsightedness. Hyperopia can be corrected by using contact lenses.

5 0

3 years ago

A student walks (2.9±0.1)m, stops and then walks another (3.9 ±0.2)m in the same directionWith the given uncertainties, what is

Anika [276]

Answer:

The smallest distance the student that the student could be possibly be from the starting point is 6.5 meters.

Explanation:

For 2 quantities A and B represented as

$A\pm \Delta A$ and $B\pm \Delta B$

The sum is represented as

$Sum=(A+B)\pm (\Delta A+\Delta B)$

For the the values given to us the sum is calculated as

$Sum=(2.9+3.9)\pm (0.1+0.2)$

$Sum=6.8\pm 0.3$

Now the since the uncertainity inthe sum is $\pm 0.3$

The closest possible distance at which the student can be is obtained by taking the negative sign in the uncertainity

Thus closest distance equals $6.8-0.3=6.5$ meters

3 0

3 years ago

How does energy from the sun affect the motion of molecules in a gas compared to molecules in a liquid?

AnnZ [28]

Molecules in a gas move faster than in a liquid.

hope it helps.

3 0

3 years ago

Read 2 more answers

758 j of heat are added to 0.750 kg of copper. how much does its temperature change?(unit=degrees c) PLEASE HELPPPPPPP MEEEEEE

DiKsa [7]

Answer:

$2.6^{\circ}C$

Explanation:

When a substance is supplied with a certain amount of heat energy, the temperature of the substance increases according to the equation

$Q=mC\Delta T$

where

m is the mass of the substance

Q is the amount of energy supplied

C is the specific heat of the substance

$\Delta T$ is the temperature change

In this problem:

Q = 758 J is the energy supplied

m = 0.750 kg is the mass of the sample

$C=385 J/kg^{\circ}C$ is the specific heat of copper

Re-arranging the equation, we can find the increase in temperature:

$\Delta T=\frac{Q}{mC}=\frac{758}{(0.750)(385)}=2.6^{\circ}C$

5 0

3 years ago

The activities of people traveling to and staying in places outside their usual environments for not more than one consecutive y

RUDIKE [14]

tourism

The activities of people traveling to and staying in places outside their usual environments for not more than one consecutive year for leisure, business,and other purposes is called

tourism

NOT:
hospitality
travel
transportation

6 0

3 years ago

Read 2 more answers