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Dvinal [7]
3 years ago
12

Science please help!​

Physics
1 answer:
IceJOKER [234]3 years ago
7 0

Explanation:

spherical lenses which are curved outward are CONVEX lenses

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What is the efficiency of the<br> machine if the input is 263 J and<br> the output is 142 J?
Papessa [141]

Answer: 57.79%

Explanation: 152J/263J=.577946768 or 57.79% or roundedthe nearest whole percent is 58%

7 0
3 years ago
In what ways water helps in germination?​
quester [9]

Answer:

Water can spread germs through bacteria.

Explanation:

Bacteria can live in water and can spread to new locations when water is moved.

6 0
3 years ago
The quantities that have only magnitude are called vector quantities​.(T or F)
Afina-wow [57]

Answer:

F

Explanation:

When comparing two vector quantities you have to compare both magnitude and direction,but for scalar you only compare magnitude

8 0
2 years ago
Read 2 more answers
. On a safari, a team of naturalists sets out toward a research station located 9.6 km away in a direction 42° north of east. Af
Elden [556K]

Answer:\theta =49.76^{\circ} North of east

Explanation:

Given

Research station is 9.6 km away in 42^{\circ}North of east

after travelling 3.1 km 25^{\circ} north of east

Position vector of safari after 3.1 km is

r_2=3.1cos25\hat{i}+3.1sin25\hat{j}

Position vector if had traveled correctly is

r_0=9.6cos42\hat{i}+9.6sin42\hat{j}

Now applying triangle law  of vector addition we can get the required vector(r_1)

r_1+r_2=r_0

r_1=(9.6cos42-3.1cos25)\hat{i}+(9.6sin42-3.1sin25)\hat{j}

r_1=4.325\hat{i}+5.112\hat{j}

Direction is given by

tan\theta =\frac{y}{x}=\frac{5.112}{4.325}

\theta =49.76^{\circ}

8 0
3 years ago
What is the Coriolis Force?
lys-0071 [83]

It's a virtual force ... one that seems to be there but isn't really there.

When something tries to fly or flow straight, through a rotating neighborhood, it ends up flying or flowing in a curved path, AS IF there were a force acting on it to make it curve. THAT apparent force is the Coriolis force.

It's what makes air, flowing away from high pressure or into low pressure, form the big rotating pressure systems on the rotating Earth.

7 0
3 years ago
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