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Leto [7]
3 years ago
7

If a 40-kg object is moving with a velocity of 65 m/s to the right, for how many minutes must a force of 4n be applied in the op

posite direction to result in a final velocity of the object of 10 m/s in the opposite direction?
Physics
1 answer:
AVprozaik [17]3 years ago
6 0
F = ma
4 = 40a
a = 0.1 m/s

v = u + at
-10 = 65 - 0.1t
t = 750s = 12.5 min
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Bob and Lily are riding on a typical carousel. Bob rides on a horse near the outer edge of the circular platform, and Lily rides
alukav5142 [94]

Answer:

Bob's angular speed is the same as that of lily

Explanation:

Because for a carousel the angular speed remains the same since velocity at center and edge are the same

6 0
3 years ago
Each level in a food chain contains less energy than the one below it because some energy is
Ira Lisetskai [31]

Answer:

Because some of the energy is dissipated in the metabolic activities such as digestion and maintaining the warmth of the body of the organism at each level.

Explanation:

Food chain is the sequential chain of energy transfer from one onrgaanism at a trophic level to another organism at the other trophic level. Autotrophs receive the energy from the sun and prepare their own food. Autotrophs then get consumed by the primary heterotrophs and further primary heterotrophs by the secondary heterotrophs. When the secondary heterotrophs die they are then consumed by the scavangers and decayed by the micro-organisms in to the soil which finally help the autotrophs (plants) in their growth.

At each trophic level of the food chain the energy does not gets completely transferred because the organisms also spend some energy in search of the food and the processing of food is also an energy consuming process.

The energy is also used in combating the climatic conditions and predators for the survival.

7 0
3 years ago
9. Seismic waves are
Brilliant_brown [7]

d. both a and b

Explanation:

Seismic waves are both transverse and compressional or longitudinal waves.

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Learn more:

Seismograph brainly.com/question/11292835

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6 0
3 years ago
There is a naturally occurring vertical electric field near the Earth’s surface that points toward the ground. In fair weather c
Neko [114]

Answer:

0.00110616446408

Explanation:

r =  Radius of sphere = 11 μm

V = Volume = \dfrac{4}{3}\pi r^3

\rho = Density of pollen = 1000 kg/m³

q = Charge = − 0.550 fC

E = Electric field = 110 N/C

g = Acceleration due to gravity = 9.81 m/s²

Mass is given by

m=\rho V\\\Rightarrow m=1000\times \dfrac{4}{3}\pi (11\times 10^{-6})^3\ kg

Force due to gravity is given by

F_g=mg\\\Rightarrow F_g=1000\times \dfrac{4}{3}\pi (11\times 10^{-6})^3\times 9.81\\\Rightarrow F_g=5.4693494471\times 10^{-11}\ N

Electric force is given by

F_e=qE\\\Rightarrow F_e=-0.55\times 10^{-15}\times 110\\\Rightarrow F_e=-6.05\times 10^{-14}\ N

The ratio is

\dfrac{F_e}{F_g}=\dfrac{6.05\times 10^{-14}}{5.4693494471\times 10^{-11}}\\\Rightarrow \dfrac{F_e}{F_g}=0.00110616446408

The ratio is 0.00110616446408

7 0
3 years ago
A 3.0 N force and a 5.0 N force are acting in opposite directions on the same 5.0 kg ball. What is the magnitude of the accelera
Nataly [62]
F(net)=ma

(5-3)=5a
2=5a
a=0.4

Hope I can help u
4 0
3 years ago
Read 2 more answers
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