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ololo11 [35]
3 years ago
12

Endothermic reactions give off heat as they proceed. a. True b. False

Physics
1 answer:
Temka [501]3 years ago
5 0
B. False
Endothermic reactions absorb heat.
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A gold ball has a mass of 45g. In a speed test, a golf ball was driven from rest to a velocity of 90m/s.
Andrew [12]

Answer:

1)

Acceleration (a)=change in velocity/ change in time

Velocity (v)=90m/s

Time=0.0005s

a=90/0.0005

The acceleration =180000m/s^2 or 180km/s^2

Force = mass x acceleration

m=40g= 0.04kg

F= 0.04x 180000

F= 7200N or 7.2kN

Explanation:

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3 years ago
Which statement is a scientifically accurate description of velocity?
ella [17]

Answer The last one is you answer

Explanation:

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An armadillo and Earth attract each other gravitationally. Which experiences the greater gravitational force, or do they experie
Taya2010 [7]

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3 years ago
What is the net force on charge placed at the center of square of length 1m? All charges have same magnitude of 2 micro coulomb.
Masja [62]

Answer:

Electric Field intensity is zero.

The reason for that is:

All charges are placed at equal distances from the center of the square and have same magnitude and sign. This means they will exert equal and opposite forces on the test charge at the center. Net force will become Zero.

5 0
3 years ago
A skier accelerates to a speed of 56 m/s over a distance of 151 m. Determine the acceleration (assume uniform) of the skier.
creativ13 [48]

The acceleration of the skier over the distance traveled is 10.38 m/s²

The given parameters;

  • Initial velocity of the skier, u = 56 m/s
  • Distance covered by the skier, s = 151 m

Acceleration is defined as the change in velocity per change in time of motion.

The magnitude of the acceleration of the skier is calculated as follows;

v^2 =u^2 - 2as\\\\

where;

<em>v is the final velocity at the end of 151 m = 0</em>

0 = 56^2 -(2\times 151)a\\\\302a = 3136\\\\a = \frac{3136}{302} \\\\a = 10.38 \ m/s^2

Thus, the acceleration of the skier over the distance traveled is 10.38 m/s²

Learn more here:brainly.com/question/20453233

7 0
2 years ago
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