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Alecsey [184]
3 years ago
9

An experiment would have a low validity if it had _____.

Biology
2 answers:
marysya [2.9K]3 years ago
7 0

Answer:c

Explanation:

ANEK [815]3 years ago
4 0
The answer is a. no controls
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The nucleus of "Lead-208", 208 82 Pb, has 82 protons within a sphere of radius 6.34×10-15 m. Each electric charge has a value of
jarptica [38.1K]

Answer:

2.94 × 10²⁰ N/C

Explanation:

Given that:  

The nucleus of "Lead-208 has 82 protons,

with a radius (r) 6.34×10-15 m, &

each electric charge has a value of 1.60218 × 10^-19 C

∴ The formula for calculating an electrical field at the surface of the nucleus is:

 E=\frac{k*q}{r^2}  

Substituting our values into the equation above, we have;

 E = \frac{8.98755*10^8*82(1.60218*10^{-19C)}}{(6.34*10^{-15}_m)^2}

E = 2.93870499×10²⁰ N/C

E ≅ 2.94 × 10²⁰ N/C

6 0
3 years ago
Although there is an overpopulation problem with white-tailed deer in the Southeastern United States, hunting is regulated. Why
dimaraw [331]
Hunting is regulated because plants still need to be eaten by the deer. if they arent, a plant species grows uncontrollably and kills off other plants.
3 0
3 years ago
11. What is speed?
Harrizon [31]

11. In everyday use and in kinematics, the speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

12. Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector. In its simplest form, average velocity is calculated by dividing change in position (Δr) by change in time (Δt).

13. Here we will learn the mathematical relation between the speed, distance and time. The speed of a moving body is the distance travelled by it in unit time. If the distance is in km and time is in hours, then the speed is km/hr. If the distance is in m and the time is in seconds, then the speed is m/sec.

14. Average speed is the distance traveled divided by elapsed time. We have noted that distance traveled can be greater than displacement. So average speed can be greater than average velocity, which is displacement divided by time

15. Both have the same average speed, so neither is the fastest. (Please see the solution in the picture)

16. Acceleration is a vector quantity which is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

3 0
3 years ago
The diagram shows the structure of an animal cell.
quester [9]

Answer:

4

Explanation:

Number 4 is the cytoplasm.

5 0
3 years ago
How are the cells in the skeletal system helping me in the action of kicking a ball?​
vesna_86 [32]

Answer:

Flexion of the hip joint occurs when the femur (upper leg) moves forwards, which happens when long jumpers land or at the end of kicking a ball.

Explanation:

6 0
3 years ago
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