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agasfer [191]
2 years ago
15

If you measured 25 g jelly beans and 25 g of gumdrops, the number of jellybeans would be

Physics
2 answers:
Ivahew [28]2 years ago
8 0

B. More than the gum drops

KengaRu [80]2 years ago
7 0

The number of jellybeans would be B.more than the gumdrops.

Please rate brainliest.

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A car whose total mass is 800kg travelling with a uniform velocity of 20m/s suddenly observes a stationary dog 50m ahead on its
maxonik [38]

Answer:

The driver hits the stationery dog because the applied force is less than required force

Explanation:

Kinetic energy will be given by

KE=0.5mv^{2} where m is the mass of the vehicle and v is the speed/velocity of the vehicle.

Substituting 800 Kg for m and 20 m/s for v we obtain

KE=0.5*800*(20 m/s)^{2}=160,000

Frictional force by vehicle pads is given by

Fr=\frac {KE}{d} where d is the distance moved

Substituting 160000 for KE and 50 m for d we obtain

Fr=\frac {160000}{50}=3200 N

Therefore, the vehicle hits the dog since the required force is 3200N but the driver applied only 2000 N

7 0
2 years ago
Why is a specimen smaller than 200 nm not visible with a light microscope?
kifflom [539]
Because the specimen is very small with a light microscope
8 0
2 years ago
A child with mass of 25 kg gets into a toy car with mass of 80 kg on a playground, causing it to sink on its springs (with effec
Bess [88]

Answer:

The frequency of the oscillation is 0.9Hz

Explanation:

This problem bothers on simple harmonic motion of a spring

Given data

Mass of the child m= 25kg

Spring constant k=791 N/m

Amplitude a= 31cm

But the period of the motion as a result of the adults sholve is expressed as

T=2π√m/k

T=2*3.142√25/791

T=6.284√0.031

T=6.284*0.176

T=1.11 sec

But frequency F=1/T

F=1/1.11

F=0.9Hz

4 0
3 years ago
A ball is attached to a vertical spring. The ball is initially supported at a height y so that the spring is neither stretched n
scoundrel [369]

Answer:

All the three quantities will have non zero joules.

Explanation:

At the initial position of rest the system will have only gravitational potential energy while the other 2 quantities will be zero.

when the system reaches a height (y-h) only kinetic energy will be zero while the other 2 quantities will be non zero

At the position of (y-h/2) all the 3 quantities will be non zero.

3 0
2 years ago
How can we maximise the rate of energy transfer to keep things cool?
faltersainse [42]
To do this we may use things that are good conductors - are painted dull black -
Have a air flow around them Maximised.


6 0
3 years ago
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